gpui: Support prompt_for_paths in TestPlatform (#58139)

Implements the previously-`unimplemented!()`
`TestPlatform::prompt_for_paths` so tests can drive the platform Open
dialog deterministically.

Adds `TestAppContext::simulate_path_prompt_response` and
`did_prompt_for_paths`, mirroring the existing `prompt_for_new_path`
test helpers (`simulate_new_path_selection`). The simulated response
validates that callers don't return multiple paths when
`PathPromptOptions::multiple` is false.

Release Notes:

- N/A

.agents/skills/gpui-test/SKILL.md

@@ -0,0 +1,160 @@
+---
+name: gpui-test
+description: >-
+  Use when writing, debugging, or reproducing GPUI tests in Zed, including
+  gpui::test arguments, TestAppContext parameters, scheduler seeds,
+  ITERATIONS/SEED reproduction, parking failures, and pending task traces.
+---
+
+# GPUI Test Debugging
+
+Use this skill when the user asks about `#[gpui::test]`, GPUI test seeds or iterations, deterministic scheduler failures, parking/pending task failures, or how to reproduce a flaky GPUI test.
+
+## What `#[gpui::test]` does
+
+`#[gpui::test]` expands to a normal Rust `#[test]`, so it runs under standard Rust test runners such as `cargo test` and `cargo nextest`.
+
+It wraps the body in GPUI's deterministic test dispatcher/scheduler and can run the same test multiple times with different seeds. The seed controls scheduler task interleavings and any `StdRng` argument injected into the test.
+
+The macro supports both synchronous and asynchronous tests.
+
+### Supported function arguments
+
+The macro recognizes arguments by type name:
+
+| Test kind | Supported arguments |
+| --- | --- |
+| Sync and async | `&TestAppContext`, `&mut TestAppContext`, `StdRng` |
+| Async only | `BackgroundExecutor` |
+| Sync only | `&App`, `&mut App` |
+
+`StdRng` is seeded from the current GPUI test seed, and `BackgroundExecutor` is backed by the same deterministic test dispatcher.
+
+### Attribute arguments
+
+Use these forms on `#[gpui::test(arguments)]`:
+
+- No arguments: runs once with seed `0`, unless `SEED` is set.
+- `seed = N`: adds a single explicit seed.
+- `seeds(...)`: adds multiple explicit seeds.
+- `iterations = N`: runs sequential seeds starting at `0` by default.
+- `retries = N`: retries a failing run up to `N` times before surfacing the failure.
+- `on_failure = "path::to::function"`: calls the function after final failure, before resuming the panic.
+- `iterations` can be combined with explicit `seed` / `seeds`; explicit seeds are appended to the `0..iterations` range.
+- If the `SEED` environment variable is set, it takes precedence over explicit seeds.
+- With `SEED=N` and `ITERATIONS=M` or `iterations = M`, the harness runs seeds `N..N+M`.
+
+## Environment variables
+
+### GPUI test macro / scheduler execution
+
+- `SEED=<u64>` — chooses the scheduler seed. Use this to reproduce a failure printed as `failing seed: N`. It also seeds injected `StdRng` arguments. For `#[gpui::property_test]`, it controls the scheduler seed and GPUI applies it to the proptest config for deterministic case generation.
+- `ITERATIONS=<usize>` — overrides the `iterations = ...` value at runtime. Use to sweep many seeds without editing the test.
+- `PENDING_TRACES=1` or `PENDING_TRACES=true` — captures and prints pending task traces when the test scheduler panics with `Parking forbidden`. Use this when `run_until_parked()` or teardown reports pending work.
+- `GPUI_RUN_UNTIL_PARKED_LOG=1` — logs when `allow_parking()` is enabled. Use to find tests that explicitly permit parking/pending work.
+- `DEBUG_SCHEDULER=1` — prints scheduler clock/timer debugging from `scheduler::TestScheduler`.
+
+### Lower-level scheduler tests
+
+- `SCHEDULER_NONINTERACTIVE=1` — suppresses interactive seed progress output in `scheduler::TestScheduler::many`. This does not affect the `#[gpui::test]` harness path.
+
+### General Rust test debugging vars often useful with GPUI tests
+
+- `RUST_BACKTRACE=1` or `RUST_BACKTRACE=full` — show panic backtraces.
+- `RUST_LOG=<filter>` — enable logs when the test initializes logging.
+- `ZED_HEADLESS=1` — forces GPUI platform guessing toward headless mode; useful for tests that otherwise interact with platform/window setup.
+
+Prefer env vars over editing the test when narrowing a reproduction.
+
+## Reproducing a specific GPUI test
+
+1. Identify the crate/package and test name.
+
+2. Run the narrowest test filter first, skip to 3. if a failing seed is known.
+
+   ```sh
+   cargo -q test -p <crate-name> <test_name> -- --nocapture
+   ```
+
+3. If the failure mentions a seed, rerun exactly that seed.
+
+   ```sh
+   SEED=<seed> cargo -q test -p <crate-name> <test_name> -- --nocapture
+   ```
+
+4. If the failure is flaky and no seed is known, sweep seeds.
+
+   ```sh
+   ITERATIONS=100 cargo -q test -p <crate-name> <test_name> -- --nocapture
+   ```
+
+   When the harness prints `failing seed: <seed>`, switch to `SEED=<seed>` for all future debugging.
+
+5. If the failure is `Parking forbidden`, rerun with pending traces.
+
+   ```sh
+   PENDING_TRACES=1 cargo -q test -p <crate-name> <test_name> -- --nocapture
+   ```
+
+   If a failing seed was printed or is already known, include it too:
+
+   ```sh
+   SEED=<seed> PENDING_TRACES=1 cargo -q test -p <crate-name> <test_name> -- --nocapture
+   ```
+
+   Inspect the pending traces for a task that was spawned but not awaited, detached, completed, or intentionally allowed to park.
+
+6. If timing or timer advancement is involved, prefer GPUI scheduler timers in tests:
+
+   ```rust
+   cx.background_executor().timer(duration).await;
+   ```
+
+   Avoid `smol::Timer::after(...)` in GPUI tests that rely on `run_until_parked()`, because GPUI's scheduler may not track it.
+
+7. Minimize the reproduction.
+   - Keep the failing `SEED` fixed.
+   - Reduce `ITERATIONS` to `1` or remove it once a seed is known.
+   - Remove unrelated setup only after confirming the same seed still fails.
+   - Preserve scheduler-sensitive awaits/yields; removing them can mask the bug.
+   - If randomness is test-controlled via `StdRng`, log or assert the generated scenario after fixing the scheduler seed.
+
+8. Validate the fix.
+   - Run the fixed seed.
+   - Run a modest seed sweep, e.g. `ITERATIONS=20`, if the failure was scheduler-sensitive.
+   - Run the relevant crate's test filter or broader suite if the touched code has shared behavior.
+
+## Common diagnosis patterns
+
+### Seed-dependent assertion failure
+
+Likely caused by a scheduler interleaving or by `StdRng`-driven test data. Fix `SEED`, reproduce, and inspect which task or generated scenario differs.
+
+### `Parking forbidden`
+
+Usually means a foreground/background task is still pending when the scheduler expected the test to make progress or finish. Look for:
+
+- A task that should be awaited but was dropped.
+- A task that should be detached with error logging.
+- A timer or receiver that is waiting forever.
+- A missing `cx.run_until_parked()` after triggering async work in a test.
+- A missing `cx.advance_clock(...)` to wait for debounced work in a test.
+- Use of non-GPUI timers or executors that the test scheduler cannot drive.
+
+Rerun with `PENDING_TRACES=1` before changing code.
+
+### Non-determinism / wrong thread
+
+The scheduler can report activity from an unexpected thread. Look for work escaping GPUI's foreground/background executors, direct thread spawns, or external async runtimes not controlled by the test dispatcher.
+
+### Tests pass alone but fail in sweeps
+
+Use the failing seed from sweep output. Avoid assuming test order unless the runner is explicitly serial. Check globals, leaked entities/tasks, and state not reset by test initialization.
+
+## Writing GPUI tests
+
+- Prefer `#[gpui::test]` for tests that need `TestAppContext`, deterministic executors, fake time, or scheduler interleaving coverage.
+- Add `iterations = N` when the test is intentionally checking interleavings.
+- Use `StdRng` as a test argument when randomized test data should follow the same seed as the scheduler.
+- Use `cx.background_executor().timer(duration).await` for delays/timeouts in GPUI tests.
+- Do not add or increase `retries` while fixing a test unless the user explicitly asks or the test already documents why probabilistic tolerance is intentional. Retries can mask the failure instead of fixing it.

.agents/skills/zed-cherry-pick/SKILL.md

@@ -0,0 +1,175 @@
+---
+name: zed-cherry-pick
+description: Cherry-pick one or more merged PRs and/or commits into Zed's `preview` or `stable` release branch. Use this whenever the user mentions cherry-picking to preview/stable, a failed cherry-pick run, or wants to manually port fix(es) into a release branch.
+---
+
+# Zed Cherry-Pick
+
+Zed ships from two long-lived release branches that live on `origin`:
+
+- `preview` channel → branch like `v1.4.x`
+- `stable` channel → branch like `v1.3.x`
+
+The version numbers change with each release. **Never hardcode them — always discover the current mapping** (see [Finding the target branch](#finding-the-target-branch)).
+
+A merged PR on `main` gets ported to a release branch by `script/cherry-pick`, normally driven by the `cherry_pick` GitHub Actions workflow. When that workflow fails (almost always a merge conflict), use this skill to finish the job locally and open the cherry-pick PR by hand.
+
+## When to use
+
+Use this when the user asks to cherry-pick one or more commits and/or Pull Requests (by number or URL) to `preview` or `stable`.
+Optionally, the user may specify whether to resolve merge conflicts; if unspecified, attempt the cherry-pick, and then if there are merge conflicts in practice, stop and inform the user that there are merge conflicts and offer to resolve them. (Users may prefer to resolve the merge conflicts themselves before continuing.)
+
+## The script you're emulating
+
+The canonical procedure lives in `script/cherry-pick` and the `cherry_pick` GitHub Actions workflow. Read the script first if anything looks off — your local steps must produce the same branch name, PR title, and PR body it would.
+
+Signature: `script/cherry-pick <branch-name> <commit-sha> <channel>`
+
+- `<branch-name>` is the release branch (e.g. `v1.4.x`), **not** the channel name.
+- `<channel>` is `preview` or `stable`, used only for display text in the PR title/body.
+
+It creates a local branch named `cherry-pick-<branch-name>-<short-sha>` (the short SHA is the first 8 chars of the commit), force-pushes it to `origin`, and opens a PR.
+
+## Finding the target branch
+
+The channel→branch mapping changes every release. Find the current one by inspecting the most recent `cherry_pick` workflow runs:
+
+```
+gh run list --workflow=cherry_pick.yml --limit 30 --json displayTitle,databaseId
+# pick a recent run for the channel you want, then:
+gh run view <id> --log 2>&1 | grep -E "BRANCH:|CHANNEL:"
+```
+
+A successful run prints both `BRANCH:` and `CHANNEL:` env vars; that's your mapping.
+
+## Procedure
+
+### 1. Gather context
+
+You need three things: the **merge commit SHA**, the **target branch**, and the **channel name**.
+
+If the user requested multiple PRs and/or commits, gather the metadata for all of them first and cherry-pick them in the order they landed on `main`, oldest to newest. For PRs, order by `mergedAt`; for raw commits, use their order on `main` when available, otherwise commit date. This tends to reduce avoidable conflicts because later changes may depend on earlier ones, but it does not guarantee a conflict-free cherry-pick when the release branch has diverged.
+
+```
+gh pr view <PR_NUMBER> --json title,number,mergeCommit,mergedAt,url
+```
+
+If the user said the workflow failed, fetch its log to see exactly which command failed and which file conflicted:
+
+```
+gh run list --workflow=cherry_pick.yml --limit 10 --json databaseId,displayTitle,status,conclusion
+gh run view <failed_run_id> --log-failed
+```
+
+The failed-run log also confirms the `BRANCH` and `COMMIT` the workflow used — handy if there's any ambiguity.
+
+### 2. Reproduce the script's setup locally
+
+The repository may be a worktree (check `.git` — if it's a file, you're in a worktree pointing at a shared gitdir). That's fine; just operate normally.
+
+```
+git --no-pager fetch origin <branch-name> <commit-sha>
+git checkout --force origin/<branch-name> -B cherry-pick-<branch-name>-<short-sha>
+git cherry-pick <commit-sha>
+```
+
+The branch name **must** match `cherry-pick-<branch-name>-<short-sha>` exactly (script convention; reviewers and tooling expect it).
+
+### 3. Check for missing prerequisite cherry-picks
+
+If the cherry-pick conflicts, do not immediately resolve the conflicts manually.
+
+First determine whether the conflict is likely caused by other PRs or commits that are already on `main` but missing from the release branch. If so, point out those candidate prerequisite PRs/commits to the user, including PR links, and offer to either resolve the conflicts manually or let the user run the GitHub cherry-pick workflow for those commits first.
+
+If the user wants to run the workflow for the missing prerequisites, stop here. This often keeps cherry-picks clean and eligible for automatic approval.
+
+Only resolve conflicts manually if:
+- no likely missing prerequisites are found, or
+- the user chooses manual conflict resolution instead of cherry-picking the prerequisites first.
+
+### 4. Resolve the conflicts manually
+
+Do this only after checking for missing prerequisite cherry-picks.
+
+- Inspect every conflicted file with `grep -n '<<<<<<<\\|>>>>>>>\\|=======' <path>` to find the markers.
+- Conflicts are usually `diff3` style with three sections: HEAD (release branch), `||||||| parent of <sha>` (merge base on `main`), and the incoming change.
+- Read the **original commit** (`git --no-pager show <commit-sha> -- <path>`) to understand the author's intent, then pick the resolution that produces the equivalent end state on the release branch.
+- Don't grab unrelated changes from `main` that happen to surround the conflict — keep the cherry-pick minimal.
+
+### 5. Validate
+
+Always build and (if reasonable) test the affected crate(s) before continuing the cherry-pick.
+
+```
+cargo check -p <affected_crate>
+cargo test  -p <affected_crate>
+```
+
+If validation fails, fix the resolution — do **not** continue with a broken build. If you can't reach a clean state, abort with `git cherry-pick --abort` and report back to the user.
+
+### 6. Finish the cherry-pick
+
+`git cherry-pick --continue` opens an editor by default. Prevent that:
+
+```
+git add <resolved_files>
+GIT_EDITOR=true git cherry-pick --continue
+```
+
+This preserves the original commit message verbatim, which is what the script does.
+
+### 7. Push and open the PR
+
+```
+git push origin -f cherry-pick-<branch-name>-<short-sha>
+```
+
+Then create the PR with the **exact** title and body format `script/cherry-pick` uses, so it's indistinguishable from an automated one.
+
+**Title:**
+
+```
+<original commit subject> (cherry-pick to <channel>)
+```
+
+The original commit subject already ends in ` (#<original_pr_number>)`; keep it.
+
+**Body** (when the original commit title ends in `(#<N>)`, which is the normal case):
+
+```
+Cherry-pick of #<original_pr_number> to <channel>
+
+----
+<original commit body, verbatim>
+```
+
+Create it with `gh pr create`, writing the body to a temp file to keep formatting intact:
+
+```
+git --no-pager log -1 --pretty=format:"%b" > /tmp/cp-body-tail.md
+printf 'Cherry-pick of #%s to %s\n\n----\n' <PR_NUMBER> <channel> | cat - /tmp/cp-body-tail.md > /tmp/cp-body.md
+gh pr create --base <branch-name> --head cherry-pick-<branch-name>-<short-sha> \\
+  --title "<commit subject> (cherry-pick to <channel>)" \\
+  --body-file /tmp/cp-body.md
+```
+
+Do **not** add a `Release Notes:` section — the original commit body already has one (or already says `N/A`), and you don't want it duplicated.
+
+## Final report to the user
+
+Tell the user:
+- The new PR URL.
+- A one-line summary of the conflict and how you resolved it.
+- What validation you ran (commands + result).
+- That their local branch is now `cherry-pick-<branch-name>-<short-sha>`, in case they want you to switch back.
+
+## Gotchas
+
+- **`--no-pager` and `GIT_EDITOR=true`**: required for non-interactive git in this environment. Forgetting `GIT_EDITOR=true` on `cherry-pick --continue` hangs the terminal.
+- **Worktree index lock**: if a previous git command was interrupted, you may see `index.lock` errors. The lock lives at `<gitdir>/index.lock` where `<gitdir>` is what `cat .git` points to (for a worktree). Remove it only if you're sure no git process is running.
+- **Don't expand the cherry-pick's scope**: when resolving conflicts, never pull in unrelated changes from `main` just because they sit next to the conflict region. The PR should be the smallest diff that reproduces the original commit's intent on the release branch.
+- **Channel branches are not called `preview`/`stable`**: don't try to `git fetch origin preview`. Look up the actual `vX.Y.x` branch name first.
+
+## When Finished
+
+After everything is finished, the last thing to do is to provide a link to the opened pull request(s) for the cherry-pick(s).

.github/CODEOWNERS.hold

@@ -55,7 +55,6 @@
 /crates/open_ai/ @zed-industries/ai-team
 /crates/open_router/ @zed-industries/ai-team
 /crates/prompt_store/ @zed-industries/ai-team
-/crates/rules_library/ @zed-industries/ai-team
 # SUGGESTED: Review needed - based on Richard Feldman (2 commits)
 /crates/shell_command_parser/ @zed-industries/ai-team
 /crates/vercel/ @zed-industries/ai-team
@@ -181,7 +180,6 @@
 /crates/fs_benchmarks/ @zed-industries/infrastructure-team
 /crates/http_client/ @zed-industries/infrastructure-team
 /crates/http_client_tls/ @zed-industries/infrastructure-team
-/crates/nc/ @zed-industries/infrastructure-team
 /crates/net/ @zed-industries/infrastructure-team
 /crates/paths/ @zed-industries/infrastructure-team
 /crates/release_channel/ @zed-industries/infrastructure-team

.github/workflows/after_release.yml

@@ -44,6 +44,7 @@ jobs:
     uses: zed-industries/zed/.github/workflows/deploy_docs.yml@main
     secrets:
       DOCS_AMPLITUDE_API_KEY: ${{ secrets.DOCS_AMPLITUDE_API_KEY }}
+      DOCS_CONSENT_IO_INSTANCE: ${{ secrets.DOCS_CONSENT_IO_INSTANCE }}
       CLOUDFLARE_API_TOKEN: ${{ secrets.CLOUDFLARE_API_TOKEN }}
       CLOUDFLARE_ACCOUNT_ID: ${{ secrets.CLOUDFLARE_ACCOUNT_ID }}
     with:

.github/workflows/autofix_pr.yml

@@ -74,8 +74,8 @@ jobs:
             git diff > autofix.patch
             echo "has_changes=true" >> "$GITHUB_OUTPUT"
         fi
-    - name: upload artifact autofix-patch
-      uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4
+    - name: autofix_pr::upload_patch_artifact
+      uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a
       with:
         name: autofix-patch
         path: autofix.patch
@@ -112,7 +112,7 @@ jobs:
         PR_NUMBER: ${{ inputs.pr_number }}
         GITHUB_TOKEN: ${{ steps.generate-token.outputs.token }}
     - name: autofix_pr::download_patch_artifact
-      uses: actions/download-artifact@018cc2cf5baa6db3ef3c5f8a56943fffe632ef53
+      uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c
       with:
         name: autofix-patch
     - name: autofix_pr::commit_changes::apply_patch
@@ -122,10 +122,10 @@ jobs:
         git commit -am "Autofix"
         git push
       env:
-        GIT_COMMITTER_NAME: Zed Zippy
-        GIT_COMMITTER_EMAIL: 234243425+zed-zippy[bot]@users.noreply.github.com
-        GIT_AUTHOR_NAME: Zed Zippy
+        GIT_AUTHOR_NAME: zed-zippy[bot]
         GIT_AUTHOR_EMAIL: 234243425+zed-zippy[bot]@users.noreply.github.com
+        GIT_COMMITTER_NAME: zed-zippy[bot]
+        GIT_COMMITTER_EMAIL: 234243425+zed-zippy[bot]@users.noreply.github.com
         GITHUB_TOKEN: ${{ steps.generate-token.outputs.token }}
 concurrency:
   group: ${{ github.workflow }}-${{ inputs.pr_number }}

.github/workflows/cherry_pick.yml

@@ -45,9 +45,9 @@ jobs:
         COMMIT: ${{ inputs.commit }}
         CHANNEL: ${{ inputs.channel }}
         GIT_AUTHOR_NAME: zed-zippy[bot]
-        GIT_AUTHOR_EMAIL: <234243425+zed-zippy[bot]@users.noreply.github.com>
+        GIT_AUTHOR_EMAIL: 234243425+zed-zippy[bot]@users.noreply.github.com
         GIT_COMMITTER_NAME: zed-zippy[bot]
-        GIT_COMMITTER_EMAIL: <234243425+zed-zippy[bot]@users.noreply.github.com>
+        GIT_COMMITTER_EMAIL: 234243425+zed-zippy[bot]@users.noreply.github.com
         GITHUB_TOKEN: ${{ steps.generate-token.outputs.token }}
 defaults:
   run:

.github/workflows/community_champion_auto_labeler.yml

@@ -1,113 +0,0 @@
-name: Community Champion Auto Labeler
-
-on:
-  issues:
-    types: [opened]
-  pull_request_target:
-    types: [opened]
-
-jobs:
-  label_community_champion:
-    if: github.repository_owner == 'zed-industries'
-    runs-on: namespace-profile-2x4-ubuntu-2404
-    steps:
-      - name: Check if author is a community champion and apply label
-        uses: actions/github-script@f28e40c7f34bde8b3046d885e986cb6290c5673b # v7
-        env:
-          COMMUNITY_CHAMPIONS: |
-            0x2CA
-            5brian
-            5herlocked
-            abdelq
-            afgomez
-            AidanV
-            akbxr
-            AlvaroParker
-            amtoaer
-            artemevsevev
-            bajrangCoder
-            bcomnes
-            Be-ing
-            blopker
-            bnjjj
-            bobbymannino
-            CharlesChen0823
-            chbk
-            davewa
-            davidbarsky
-            ddoemonn
-            djsauble
-            errmayank
-            fantacell
-            fdncred
-            findrakecil
-            FloppyDisco
-            gko
-            huacnlee
-            imumesh18
-            injust
-            jacobtread
-            jansol
-            jeffreyguenther
-            jenslys
-            jongretar
-            lemorage
-            lingyaochu
-            lnay
-            marcocondrache
-            marius851000
-            mikebronner
-            ognevny
-            PKief
-            playdohface
-            RemcoSmitsDev
-            rgbkrk
-            romaninsh
-            rxptr
-            Simek
-            someone13574
-            sourcefrog
-            suxiaoshao
-            Takk8IS
-            tartarughina
-            thedadams
-            tidely
-            timvermeulen
-            valentinegb
-            versecafe
-            vitallium
-            WhySoBad
-            ya7010
-            Zertsov
-        with:
-          script: |
-            const communityChampions = process.env.COMMUNITY_CHAMPIONS
-              .split('\n')
-              .map(handle => handle.trim().toLowerCase())
-              .filter(handle => handle.length > 0);
-
-            let author;
-            if (context.eventName === 'issues') {
-              author = context.payload.issue.user.login;
-            } else if (context.eventName === 'pull_request_target') {
-              author = context.payload.pull_request.user.login;
-            }
-
-            if (!author || !communityChampions.includes(author.toLowerCase())) {
-              return;
-            }
-
-            const issueNumber = context.payload.issue?.number || context.payload.pull_request?.number;
-
-            try {
-              await github.rest.issues.addLabels({
-                owner: context.repo.owner,
-                repo: context.repo.repo,
-                issue_number: issueNumber,
-                labels: ['community champion']
-              });
-
-              console.log(`Applied 'community champion' label to #${issueNumber} by ${author}`);
-            } catch (error) {
-              console.error(`Failed to apply label: ${error.message}`);
-            }

.github/workflows/compare_perf.yml

@@ -69,8 +69,8 @@ jobs:
       env:
         BASE: ${{ inputs.base }}
         HEAD: ${{ inputs.head }}
-    - name: '@actions/upload-artifact results.md'
-      uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4
+    - name: run_bundling::upload_artifact
+      uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a
       with:
         name: results.md
         path: results.md

.github/workflows/compliance_check.yml

@@ -42,9 +42,9 @@ jobs:
         GITHUB_APP_KEY: ${{ secrets.ZED_ZIPPY_APP_PRIVATE_KEY }}
         LATEST_TAG: ${{ steps.determine-version.outputs.tag }}
       continue-on-error: true
-    - name: '@actions/upload-artifact compliance-report-${{ github.ref_name }}.md'
+    - name: run_bundling::upload_artifact
       if: always()
-      uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4
+      uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a
       with:
         name: compliance-report-${{ github.ref_name }}.md
         path: compliance-report-${{ github.ref_name }}.md

.github/workflows/deploy_docs.yml

@@ -16,6 +16,9 @@ on:
       DOCS_AMPLITUDE_API_KEY:
         description: DOCS_AMPLITUDE_API_KEY
         required: true
+      DOCS_CONSENT_IO_INSTANCE:
+        description: DOCS_CONSENT_IO_INSTANCE
+        required: true
       CLOUDFLARE_API_TOKEN:
         description: CLOUDFLARE_API_TOKEN
         required: true
@@ -39,6 +42,7 @@ jobs:
     runs-on: namespace-profile-16x32-ubuntu-2204
     env:
       DOCS_AMPLITUDE_API_KEY: ${{ secrets.DOCS_AMPLITUDE_API_KEY }}
+      DOCS_CONSENT_IO_INSTANCE: ${{ secrets.DOCS_CONSENT_IO_INSTANCE }}
       CC: clang
       CXX: clang++
     steps:
@@ -143,7 +147,7 @@ jobs:
         command: deploy .cloudflare/docs-proxy/src/worker.js
     - name: deploy_docs::docs_deploy_steps::upload_wrangler_logs
       if: always()
-      uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02
+      uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a
       with:
         name: wrangler_logs
         path: /home/runner/.config/.wrangler/logs/

.github/workflows/deploy_nightly_docs.yml

@@ -13,6 +13,7 @@ jobs:
     uses: zed-industries/zed/.github/workflows/deploy_docs.yml@main
     secrets:
       DOCS_AMPLITUDE_API_KEY: ${{ secrets.DOCS_AMPLITUDE_API_KEY }}
+      DOCS_CONSENT_IO_INSTANCE: ${{ secrets.DOCS_CONSENT_IO_INSTANCE }}
       CLOUDFLARE_API_TOKEN: ${{ secrets.CLOUDFLARE_API_TOKEN }}
       CLOUDFLARE_ACCOUNT_ID: ${{ secrets.CLOUDFLARE_ACCOUNT_ID }}
     with:

.github/workflows/extension_bump.yml

@@ -5,7 +5,7 @@ env:
   CARGO_TERM_COLOR: always
   RUST_BACKTRACE: '1'
   CARGO_INCREMENTAL: '0'
-  ZED_EXTENSION_CLI_SHA: 1fa7f1a3ec28ea1eae6db2e937d7a538fb10c0c7
+  ZED_EXTENSION_CLI_SHA: 2a00db06ce6d01089bfafd207b6348078e980df9
 on:
   workflow_call:
     inputs:
@@ -187,10 +187,10 @@ jobs:
       env:
         CURRENT_VERSION: ${{ needs.check_version_changed.outputs.current_version }}
         WORKING_DIR: ${{ inputs.working-directory }}
-    - name: extension_bump::create_version_tag
+    - name: steps::create_tag
       uses: actions/github-script@f28e40c7f34bde8b3046d885e986cb6290c5673b
       with:
-        script: |-
+        script: |
           github.rest.git.createRef({
               owner: context.repo.owner,
               repo: context.repo.repo,
@@ -239,10 +239,9 @@ jobs:
         tag: ${{ needs.create_version_label.outputs.tag }}
       env:
         COMMITTER_TOKEN: ${{ steps.generate-token.outputs.token }}
-    - name: extension_bump::enable_automerge_if_staff
+    - name: enable_automerge_if_staff
       uses: actions/github-script@f28e40c7f34bde8b3046d885e986cb6290c5673b
       with:
-        github-token: ${{ steps.generate-token.outputs.token }}
         script: |
           const prNumber = process.env.PR_NUMBER;
           if (!prNumber) {
@@ -301,6 +300,7 @@ jobs:
           `, { pullRequestId: pr.node_id });
 
           console.log(`Automerge enabled for PR #${prNumber} in zed-industries/extensions`);
+        github-token: ${{ steps.generate-token.outputs.token }}
       env:
         PR_NUMBER: ${{ steps.extension-update.outputs.pull-request-number }}
     defaults:

.github/workflows/extension_tests.yml

@@ -5,7 +5,7 @@ env:
   CARGO_TERM_COLOR: always
   RUST_BACKTRACE: '1'
   CARGO_INCREMENTAL: '0'
-  ZED_EXTENSION_CLI_SHA: 1fa7f1a3ec28ea1eae6db2e937d7a538fb10c0c7
+  ZED_EXTENSION_CLI_SHA: 2a00db06ce6d01089bfafd207b6348078e980df9
   RUSTUP_TOOLCHAIN: stable
   CARGO_BUILD_TARGET: wasm32-wasip2
 on:
@@ -149,7 +149,7 @@ jobs:
     - name: run_tests::run_ts_query_ls
       run: |-
         tar -xf "$GITHUB_WORKSPACE/ts_query_ls-x86_64-unknown-linux-gnu.tar.gz" -C "$GITHUB_WORKSPACE"
-        "$GITHUB_WORKSPACE/ts_query_ls" format --check . || {
+        "$GITHUB_WORKSPACE/ts_query_ls" format --check languages || {
             echo "Found unformatted queries, please format them with ts_query_ls."
             echo "For easy use, install the Tree-sitter query extension:"
             echo "zed://extension/tree-sitter-query"

.github/workflows/extension_workflow_rollout.yml

@@ -56,7 +56,7 @@ jobs:
       env:
         PREV_COMMIT: ${{ steps.prev-tag.outputs.prev_commit }}
     - id: list-repos
-      name: extension_workflow_rollout::fetch_extension_repos::get_repositories
+      name: get_repositories
       uses: actions/github-script@f28e40c7f34bde8b3046d885e986cb6290c5673b
       with:
         script: |
@@ -91,7 +91,7 @@ jobs:
       env:
         COMMIT_SHA: ${{ github.sha }}
     - name: extension_workflow_rollout::fetch_extension_repos::upload_workflow_files
-      uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4
+      uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a
       with:
         name: extension-workflow-files
         path: extensions/workflows/**/*.yml
@@ -132,7 +132,7 @@ jobs:
         repository: zed-extensions/${{ matrix.repo }}
         token: ${{ steps.generate-token.outputs.token }}
     - name: extension_workflow_rollout::rollout_workflows_to_extension::download_workflow_files
-      uses: actions/download-artifact@018cc2cf5baa6db3ef3c5f8a56943fffe632ef53
+      uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c
       with:
         name: extension-workflow-files
         path: workflow-files
@@ -220,10 +220,6 @@ jobs:
         clean: false
         fetch-depth: 0
         token: ${{ steps.generate-token.outputs.token }}
-    - name: extension_workflow_rollout::create_rollout_tag::configure_git
-      run: |
-        git config user.name "zed-zippy[bot]"
-        git config user.email "234243425+zed-zippy[bot]@users.noreply.github.com"
     - name: extension_workflow_rollout::create_rollout_tag::update_rollout_tag
       run: |
         if git rev-parse "extension-workflows" >/dev/null 2>&1; then
@@ -234,6 +230,11 @@ jobs:
         echo "Creating new tag 'extension-workflows' at $(git rev-parse --short HEAD)"
         git tag "extension-workflows"
         git push origin "extension-workflows"
+      env:
+        GIT_AUTHOR_NAME: zed-zippy[bot]
+        GIT_AUTHOR_EMAIL: 234243425+zed-zippy[bot]@users.noreply.github.com
+        GIT_COMMITTER_NAME: zed-zippy[bot]
+        GIT_COMMITTER_EMAIL: 234243425+zed-zippy[bot]@users.noreply.github.com
     timeout-minutes: 1
 defaults:
   run:

.github/workflows/nix_build.yml

@@ -0,0 +1,97 @@
+# Generated from xtask::workflows::nix_build
+# Rebuild with `cargo xtask workflows`.
+name: nix_build
+env:
+  CARGO_TERM_COLOR: always
+  RUST_BACKTRACE: '1'
+on:
+  pull_request:
+    types:
+    - labeled
+    - synchronize
+jobs:
+  build_nix_linux_x86_64:
+    if: (github.repository_owner == 'zed-industries' || github.repository_owner == 'zed-extensions') && ((github.event.action == 'labeled' && (github.event.label.name == 'run-nix' || github.event.label.name == 'run-bundling')) || (github.event.action == 'synchronize' && (contains(github.event.pull_request.labels.*.name, 'run-nix') || contains(github.event.pull_request.labels.*.name, 'run-bundling'))))
+    runs-on: namespace-profile-32x64-ubuntu-2004
+    env:
+      ZED_CLIENT_CHECKSUM_SEED: ${{ secrets.ZED_CLIENT_CHECKSUM_SEED }}
+      ZED_MINIDUMP_ENDPOINT: ${{ secrets.ZED_SENTRY_MINIDUMP_ENDPOINT }}
+      ZED_CLOUD_PROVIDER_ADDITIONAL_MODELS_JSON: ${{ secrets.ZED_CLOUD_PROVIDER_ADDITIONAL_MODELS_JSON }}
+      GIT_LFS_SKIP_SMUDGE: '1'
+    steps:
+    - name: steps::checkout_repo
+      uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd
+      with:
+        clean: false
+    - name: steps::cache_nix_dependencies_namespace
+      uses: namespacelabs/nscloud-cache-action@a90bb5d4b27522ce881c6e98eebd7d7e6d1653f9
+      with:
+        cache: nix
+    - name: nix_build::build_nix::install_nix
+      uses: cachix/install-nix-action@02a151ada4993995686f9ed4f1be7cfbb229e56f
+      with:
+        github_access_token: ${{ secrets.GITHUB_TOKEN }}
+    - name: nix_build::build_nix::cachix_action
+      uses: cachix/cachix-action@0fc020193b5a1fa3ac4575aa3a7d3aa6a35435ad
+      with:
+        name: zed
+        authToken: ${{ secrets.CACHIX_AUTH_TOKEN }}
+        cachixArgs: -v
+        pushFilter: -zed-editor-[0-9.]*
+    - name: nix_build::build_nix::build
+      run: nix build .#default -L --accept-flake-config
+    timeout-minutes: 60
+    continue-on-error: true
+  build_nix_mac_aarch64:
+    if: (github.repository_owner == 'zed-industries' || github.repository_owner == 'zed-extensions') && ((github.event.action == 'labeled' && (github.event.label.name == 'run-nix' || github.event.label.name == 'run-bundling')) || (github.event.action == 'synchronize' && (contains(github.event.pull_request.labels.*.name, 'run-nix') || contains(github.event.pull_request.labels.*.name, 'run-bundling'))))
+    runs-on: namespace-profile-mac-large
+    env:
+      ZED_CLIENT_CHECKSUM_SEED: ${{ secrets.ZED_CLIENT_CHECKSUM_SEED }}
+      ZED_MINIDUMP_ENDPOINT: ${{ secrets.ZED_SENTRY_MINIDUMP_ENDPOINT }}
+      ZED_CLOUD_PROVIDER_ADDITIONAL_MODELS_JSON: ${{ secrets.ZED_CLOUD_PROVIDER_ADDITIONAL_MODELS_JSON }}
+      GIT_LFS_SKIP_SMUDGE: '1'
+    steps:
+    - name: steps::checkout_repo
+      uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd
+      with:
+        clean: false
+    - name: steps::cache_nix_store_macos
+      uses: namespacelabs/nscloud-cache-action@a90bb5d4b27522ce881c6e98eebd7d7e6d1653f9
+      with:
+        path: ~/nix-cache
+    - name: nix_build::build_nix::install_nix
+      uses: cachix/install-nix-action@02a151ada4993995686f9ed4f1be7cfbb229e56f
+      with:
+        github_access_token: ${{ secrets.GITHUB_TOKEN }}
+    - name: nix_build::build_nix::configure_local_nix_cache
+      run: |
+        mkdir -p ~/nix-cache
+        echo "extra-substituters = file://$HOME/nix-cache?priority=10" | sudo tee -a /etc/nix/nix.conf
+        echo "require-sigs = false" | sudo tee -a /etc/nix/nix.conf
+        sudo launchctl kickstart -k system/org.nixos.nix-daemon
+    - name: nix_build::build_nix::cachix_action
+      uses: cachix/cachix-action@0fc020193b5a1fa3ac4575aa3a7d3aa6a35435ad
+      with:
+        name: zed
+        authToken: ${{ secrets.CACHIX_AUTH_TOKEN }}
+        cachixArgs: -v
+        pushFilter: -zed-editor-[0-9.]*
+    - name: nix_build::build_nix::build
+      run: nix build .#default -L --accept-flake-config
+    - name: nix_build::build_nix::export_to_local_nix_cache
+      if: always()
+      run: |
+        if [ -L result ]; then
+          echo "Copying build closure to local binary cache..."
+          nix copy --to "file://$HOME/nix-cache" ./result || echo "Warning: nix copy to local cache failed"
+        else
+          echo "No build result found, skipping cache export."
+        fi
+    timeout-minutes: 60
+    continue-on-error: true
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.ref }}
+  cancel-in-progress: true
+defaults:
+  run:
+    shell: bash -euxo pipefail {0}

.github/workflows/pr_issue_labeler.yml

@@ -0,0 +1,247 @@
+# Labels pull requests by author:
+#  - 'community champion' for community champions
+#  - 'bot' for bot accounts
+#  - 'staff' for staff team members
+#  - 'guild' for guild members
+#  - 'first contribution' for first-time external contributors
+# Labels issues by author:
+#  - 'community champion' for community champions
+
+name: PR Issue Labeler
+
+on:
+  issues:
+    types: [opened]
+  pull_request_target:
+    types: [opened]
+
+permissions:
+  contents: read
+
+jobs:
+  check-authorship-and-label:
+    if: github.repository == 'zed-industries/zed'
+    runs-on: namespace-profile-2x4-ubuntu-2404
+    timeout-minutes: 5
+    steps:
+      - id: get-app-token
+        uses: actions/create-github-app-token@f8d387b68d61c58ab83c6c016672934102569859 # v3.0.0
+        with:
+          app-id: ${{ secrets.ZED_COMMUNITY_BOT_APP_ID }}
+          private-key: ${{ secrets.ZED_COMMUNITY_BOT_PRIVATE_KEY }}
+          owner: zed-industries
+
+      - id: apply-authorship-label
+        uses: actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea # v7.0.1
+        with:
+          github-token: ${{ steps.get-app-token.outputs.token }}
+          script: |
+            const BOT_LABEL = 'bot';
+            const STAFF_LABEL = 'staff';
+            const STAFF_TEAM_SLUG = 'staff';
+            const FIRST_CONTRIBUTION_LABEL = 'first contribution';
+            const GUILD_LABEL = 'guild';
+            const GUILD_MEMBERS = [
+              '11happy',
+              'AidanV',
+              'alanpjohn',
+              'AmaanBilwar',
+              'arjunkomath',
+              'austincummings',
+              'ayushk-1801',
+              'criticic',
+              'dongdong867',
+              'emamulandalib',
+              'eureka928',
+              'feitreim',
+              'iam-liam',
+              'iksuddle',
+              'ishaksebsib',
+              'lingyaochu',
+              'loadingalias',
+              'marcocondrache',
+              'mchisolm0',
+              'MostlyKIGuess',
+              'nairadithya',
+              'nihalxkumar',
+              'notJoon',
+              'OmChillure',
+              'Palanikannan1437',
+              'polyesterswing',
+              'prayanshchh',
+              'razeghi71',
+              'sarmadgulzar',
+              'seanstrom',
+              'Shivansh-25',
+              'SkandaBhat',
+              'th0jensen',
+              'tommyming',
+              'transitoryangel',
+              'TwistingTwists',
+              'virajbhartiya',
+              'YEDASAVG',
+              'Ziqi-Yang',
+            ];
+            const COMMUNITY_CHAMPION_LABEL = 'community champion';
+            const COMMUNITY_CHAMPIONS = [
+              '0x2CA',
+              '5brian',
+              '5herlocked',
+              'abdelq',
+              'afgomez',
+              'AidanV',
+              'akbxr',
+              'AlvaroParker',
+              'amtoaer',
+              'artemevsevev',
+              'bajrangCoder',
+              'bcomnes',
+              'Be-ing',
+              'blopker',
+              'bnjjj',
+              'bobbymannino',
+              'CharlesChen0823',
+              'chbk',
+              'davewa',
+              'davidbarsky',
+              'ddoemonn',
+              'djsauble',
+              'errmayank',
+              'fantacell',
+              'fdncred',
+              'findrakecil',
+              'FloppyDisco',
+              'gko',
+              'huacnlee',
+              'imumesh18',
+              'injust',
+              'jacobtread',
+              'jansol',
+              'jeffreyguenther',
+              'jenslys',
+              'jongretar',
+              'lemorage',
+              'lingyaochu',
+              'lnay',
+              'marcocondrache',
+              'marius851000',
+              'mikebronner',
+              'ognevny',
+              'PKief',
+              'playdohface',
+              'RemcoSmitsDev',
+              'rgbkrk',
+              'romaninsh',
+              'rxptr',
+              'Simek',
+              'someone13574',
+              'sourcefrog',
+              'suxiaoshao',
+              'Takk8IS',
+              'tartarughina',
+              'thedadams',
+              'tidely',
+              'timvermeulen',
+              'valentinegb',
+              'versecafe',
+              'vitallium',
+              'WhySoBad',
+              'ya7010',
+              'Zertsov',
+            ];
+
+            const pr = context.payload.pull_request;
+            const issue = context.payload.issue;
+            const target = pr || issue;
+            const author = target.user.login;
+
+            const listIncludesAuthor = (members, author) => {
+              const authorLower = author.toLowerCase();
+              return members.some((member) => member.toLowerCase() === authorLower);
+            };
+
+            const isStaffMember = async (author) => {
+              try {
+                const response = await github.rest.teams.getMembershipForUserInOrg({
+                  org: 'zed-industries',
+                  team_slug: STAFF_TEAM_SLUG,
+                  username: author
+                });
+                return response.data.state === 'active';
+              } catch (error) {
+                if (error.status !== 404) {
+                  throw error;
+                }
+                return false;
+              }
+            };
+
+            const getIssueLabels = () => {
+              if (listIncludesAuthor(COMMUNITY_CHAMPIONS, author)) {
+                return [COMMUNITY_CHAMPION_LABEL];
+              }
+
+              return [];
+            };
+
+            const getPullRequestLabels = async () => {
+              if (target.user.type === 'Bot') {
+                return [BOT_LABEL];
+              }
+
+              if (await isStaffMember(author)) {
+                return [STAFF_LABEL];
+              }
+
+              // External contributors
+
+              const labelsToAdd = [];
+
+              if (listIncludesAuthor(COMMUNITY_CHAMPIONS, author)) {
+                labelsToAdd.push(COMMUNITY_CHAMPION_LABEL);
+              }
+
+              if (listIncludesAuthor(GUILD_MEMBERS, author)) {
+                labelsToAdd.push(GUILD_LABEL);
+              }
+
+              // We use inverted logic here due to a suspected GitHub bug where first-time contributors
+              // get 'NONE' instead of 'FIRST_TIME_CONTRIBUTOR' or 'FIRST_TIMER'.
+              // https://github.com/orgs/community/discussions/78038
+              // This will break if GitHub ever adds new associations.
+              const association = pr.author_association;
+              const knownAssociations = ['CONTRIBUTOR', 'COLLABORATOR', 'MEMBER', 'OWNER', 'MANNEQUIN'];
+
+              if (knownAssociations.includes(association)) {
+                console.log(`PR #${pr.number} by ${author}: not a first-time contributor (association: '${association}')`);
+              } else {
+                labelsToAdd.push(FIRST_CONTRIBUTION_LABEL);
+              }
+
+              return labelsToAdd;
+            };
+
+            const labelsToAdd = pr ? await getPullRequestLabels() : getIssueLabels();
+
+            if (labelsToAdd.length === 0) {
+              return;
+            }
+
+            try {
+              await github.rest.issues.addLabels({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                issue_number: target.number,
+                labels: labelsToAdd
+              });
+
+              const targetType = pr ? 'PR' : 'issue';
+              const labels = labelsToAdd.map((label) => `'${label}'`).join(', ');
+              console.log(`${targetType} #${target.number} by ${author}: labeled ${labels}`);
+            } catch (error) {
+              if (pr) {
+                throw error;
+              }
+
+              console.error(`Failed to label issue #${target.number}: ${error.message}`);
+            }

.github/workflows/pr_labeler.yml

@@ -1,150 +0,0 @@
-# Labels pull requests by author: 'bot' for bot accounts, 'staff' for
-# staff team members, 'guild' for guild members, 'first contribution' for
-# first-time external contributors.
-name: PR Labeler
-
-on:
-  pull_request_target:
-    types: [opened]
-
-permissions:
-  contents: read
-
-jobs:
-  check-authorship-and-label:
-    if: github.repository == 'zed-industries/zed'
-    runs-on: namespace-profile-2x4-ubuntu-2404
-    timeout-minutes: 5
-    steps:
-      - id: get-app-token
-        uses: actions/create-github-app-token@f8d387b68d61c58ab83c6c016672934102569859 # v3.0.0
-        with:
-          app-id: ${{ secrets.ZED_COMMUNITY_BOT_APP_ID }}
-          private-key: ${{ secrets.ZED_COMMUNITY_BOT_PRIVATE_KEY }}
-          owner: zed-industries
-
-      - id: apply-authorship-label
-        uses: actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea # v7.0.1
-        with:
-          github-token: ${{ steps.get-app-token.outputs.token }}
-          script: |
-            const BOT_LABEL = 'bot';
-            const STAFF_LABEL = 'staff';
-            const GUILD_LABEL = 'guild';
-            const FIRST_CONTRIBUTION_LABEL = 'first contribution';
-            const STAFF_TEAM_SLUG = 'staff';
-            const GUILD_MEMBERS = [
-              '11happy',
-              'AidanV',
-              'AmaanBilwar',
-              'MostlyKIGuess',
-              'OmChillure',
-              'Palanikannan1437',
-              'Shivansh-25',
-              'SkandaBhat',
-              'TwistingTwists',
-              'YEDASAVG',
-              'Ziqi-Yang',
-              'alanpjohn',
-              'arjunkomath',
-              'austincummings',
-              'ayushk-1801',
-              'criticic',
-              'dongdong867',
-              'emamulandalib',
-              'eureka928',
-              'feitreim',
-              'iam-liam',
-              'iksuddle',
-              'ishaksebsib',
-              'lingyaochu',
-              'loadingalias',
-              'marcocondrache',
-              'mchisolm0',
-              'nairadithya',
-              'nihalxkumar',
-              'notJoon',
-              'polyesterswing',
-              'prayanshchh',
-              'razeghi71',
-              'sarmadgulzar',
-              'seanstrom',
-              'th0jensen',
-              'tommyming',
-              'transitoryangel',
-              'virajbhartiya',
-            ];
-
-            const pr = context.payload.pull_request;
-            const author = pr.user.login;
-
-            if (pr.user.type === 'Bot') {
-              await github.rest.issues.addLabels({
-                owner: context.repo.owner,
-                repo: context.repo.repo,
-                issue_number: pr.number,
-                labels: [BOT_LABEL]
-              });
-              console.log(`PR #${pr.number} by ${author}: labeled '${BOT_LABEL}' (user type: '${pr.user.type}')`);
-              return;
-            }
-
-            let isStaff = false;
-            try {
-              const response = await github.rest.teams.getMembershipForUserInOrg({
-                org: 'zed-industries',
-                team_slug: STAFF_TEAM_SLUG,
-                username: author
-              });
-              isStaff = response.data.state === 'active';
-            } catch (error) {
-              if (error.status !== 404) {
-                throw error;
-              }
-            }
-
-            if (isStaff) {
-              await github.rest.issues.addLabels({
-                owner: context.repo.owner,
-                repo: context.repo.repo,
-                issue_number: pr.number,
-                labels: [STAFF_LABEL]
-              });
-              console.log(`PR #${pr.number} by ${author}: labeled '${STAFF_LABEL}' (staff team member)`);
-              return;
-            }
-
-            const authorLower = author.toLowerCase();
-            const isGuildMember = GUILD_MEMBERS.some(
-              (member) => member.toLowerCase() === authorLower
-            );
-            if (isGuildMember) {
-              await github.rest.issues.addLabels({
-                owner: context.repo.owner,
-                repo: context.repo.repo,
-                issue_number: pr.number,
-                labels: [GUILD_LABEL]
-              });
-              console.log(`PR #${pr.number} by ${author}: labeled '${GUILD_LABEL}' (guild member)`);
-              // No early return: guild members can also get 'first contribution'
-            }
-
-            // We use inverted logic here due to a suspected GitHub bug where first-time contributors
-            // get 'NONE' instead of 'FIRST_TIME_CONTRIBUTOR' or 'FIRST_TIMER'.
-            // https://github.com/orgs/community/discussions/78038
-            // This will break if GitHub ever adds new associations.
-            const association = pr.author_association;
-            const knownAssociations = ['CONTRIBUTOR', 'COLLABORATOR', 'MEMBER', 'OWNER', 'MANNEQUIN'];
-
-            if (knownAssociations.includes(association)) {
-              console.log(`PR #${pr.number} by ${author}: not a first-time contributor (association: '${association}')`);
-              return;
-            }
-
-            await github.rest.issues.addLabels({
-              owner: context.repo.owner,
-              repo: context.repo.repo,
-              issue_number: pr.number,
-              labels: [FIRST_CONTRIBUTION_LABEL]
-            });
-            console.log(`PR #${pr.number} by ${author}: labeled '${FIRST_CONTRIBUTION_LABEL}' (association: '${association}')`);

.github/workflows/release.yml

@@ -321,9 +321,9 @@ jobs:
         GITHUB_APP_ID: ${{ secrets.ZED_ZIPPY_APP_ID }}
         GITHUB_APP_KEY: ${{ secrets.ZED_ZIPPY_APP_PRIVATE_KEY }}
       continue-on-error: true
-    - name: '@actions/upload-artifact compliance-report-${{ github.ref_name }}.md'
+    - name: run_bundling::upload_artifact
       if: always()
-      uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4
+      uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a
       with:
         name: compliance-report-${{ github.ref_name }}.md
         path: compliance-report-${{ github.ref_name }}.md
@@ -377,14 +377,14 @@ jobs:
       run: ./script/download-wasi-sdk
     - name: ./script/bundle-linux
       run: ./script/bundle-linux
-    - name: '@actions/upload-artifact zed-linux-aarch64.tar.gz'
-      uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4
+    - name: run_bundling::upload_artifact
+      uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a
       with:
         name: zed-linux-aarch64.tar.gz
         path: target/release/zed-linux-aarch64.tar.gz
         if-no-files-found: error
-    - name: '@actions/upload-artifact zed-remote-server-linux-aarch64.gz'
-      uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4
+    - name: run_bundling::upload_artifact
+      uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a
       with:
         name: zed-remote-server-linux-aarch64.gz
         path: target/zed-remote-server-linux-aarch64.gz
@@ -417,14 +417,14 @@ jobs:
       run: ./script/download-wasi-sdk
     - name: ./script/bundle-linux
       run: ./script/bundle-linux
-    - name: '@actions/upload-artifact zed-linux-x86_64.tar.gz'
-      uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4
+    - name: run_bundling::upload_artifact
+      uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a
       with:
         name: zed-linux-x86_64.tar.gz
         path: target/release/zed-linux-x86_64.tar.gz
         if-no-files-found: error
-    - name: '@actions/upload-artifact zed-remote-server-linux-x86_64.gz'
-      uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4
+    - name: run_bundling::upload_artifact
+      uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a
       with:
         name: zed-remote-server-linux-x86_64.gz
         path: target/zed-remote-server-linux-x86_64.gz
@@ -462,14 +462,14 @@ jobs:
       run: ./script/clear-target-dir-if-larger-than 350 200
     - name: run_bundling::bundle_mac::bundle_mac
       run: ./script/bundle-mac aarch64-apple-darwin
-    - name: '@actions/upload-artifact Zed-aarch64.dmg'
-      uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4
+    - name: run_bundling::upload_artifact
+      uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a
       with:
         name: Zed-aarch64.dmg
         path: target/aarch64-apple-darwin/release/Zed-aarch64.dmg
         if-no-files-found: error
-    - name: '@actions/upload-artifact zed-remote-server-macos-aarch64.gz'
-      uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4
+    - name: run_bundling::upload_artifact
+      uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a
       with:
         name: zed-remote-server-macos-aarch64.gz
         path: target/zed-remote-server-macos-aarch64.gz
@@ -507,14 +507,14 @@ jobs:
       run: ./script/clear-target-dir-if-larger-than 350 200
     - name: run_bundling::bundle_mac::bundle_mac
       run: ./script/bundle-mac x86_64-apple-darwin
-    - name: '@actions/upload-artifact Zed-x86_64.dmg'
-      uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4
+    - name: run_bundling::upload_artifact
+      uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a
       with:
         name: Zed-x86_64.dmg
         path: target/x86_64-apple-darwin/release/Zed-x86_64.dmg
         if-no-files-found: error
-    - name: '@actions/upload-artifact zed-remote-server-macos-x86_64.gz'
-      uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4
+    - name: run_bundling::upload_artifact
+      uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a
       with:
         name: zed-remote-server-macos-x86_64.gz
         path: target/zed-remote-server-macos-x86_64.gz
@@ -552,14 +552,14 @@ jobs:
       run: script/bundle-windows.ps1 -Architecture aarch64
       shell: pwsh
       working-directory: ${{ env.ZED_WORKSPACE }}
-    - name: '@actions/upload-artifact Zed-aarch64.exe'
-      uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4
+    - name: run_bundling::upload_artifact
+      uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a
       with:
         name: Zed-aarch64.exe
         path: target/Zed-aarch64.exe
         if-no-files-found: error
-    - name: '@actions/upload-artifact zed-remote-server-windows-aarch64.zip'
-      uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4
+    - name: run_bundling::upload_artifact
+      uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a
       with:
         name: zed-remote-server-windows-aarch64.zip
         path: target/zed-remote-server-windows-aarch64.zip
@@ -597,14 +597,14 @@ jobs:
       run: script/bundle-windows.ps1 -Architecture x86_64
       shell: pwsh
       working-directory: ${{ env.ZED_WORKSPACE }}
-    - name: '@actions/upload-artifact Zed-x86_64.exe'
-      uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4
+    - name: run_bundling::upload_artifact
+      uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a
       with:
         name: Zed-x86_64.exe
         path: target/Zed-x86_64.exe
         if-no-files-found: error
-    - name: '@actions/upload-artifact zed-remote-server-windows-x86_64.zip'
-      uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4
+    - name: run_bundling::upload_artifact
+      uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a
       with:
         name: zed-remote-server-windows-x86_64.zip
         path: target/zed-remote-server-windows-x86_64.zip
@@ -622,7 +622,7 @@ jobs:
     runs-on: namespace-profile-4x8-ubuntu-2204
     steps:
     - name: release::download_workflow_artifacts
-      uses: actions/download-artifact@018cc2cf5baa6db3ef3c5f8a56943fffe632ef53
+      uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c
       with:
         path: ./artifacts/
     - name: ls -lR ./artifacts
@@ -694,9 +694,9 @@ jobs:
       env:
         GITHUB_APP_ID: ${{ secrets.ZED_ZIPPY_APP_ID }}
         GITHUB_APP_KEY: ${{ secrets.ZED_ZIPPY_APP_PRIVATE_KEY }}
-    - name: '@actions/upload-artifact compliance-report-${{ github.ref_name }}.md'
+    - name: run_bundling::upload_artifact
       if: always()
-      uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4
+      uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a
       with:
         name: compliance-report-${{ github.ref_name }}.md
         path: compliance-report-${{ github.ref_name }}.md

.github/workflows/release_nightly.yml

@@ -5,29 +5,40 @@ env:
   CARGO_TERM_COLOR: always
   RUST_BACKTRACE: '1'
 on:
-  push:
-    tags:
-    - nightly
   schedule:
-  - cron: 0 7 * * *
+  - cron: 0 */4 * * *
+  workflow_dispatch: {}
 jobs:
-  check_style:
+  check_nightly_tag:
     if: (github.repository_owner == 'zed-industries' || github.repository_owner == 'zed-extensions')
-    runs-on: namespace-profile-mac-large
+    runs-on: namespace-profile-2x4-ubuntu-2404
     steps:
     - name: steps::checkout_repo
       uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd
       with:
         clean: false
-        fetch-depth: 0
-    - name: steps::cargo_fmt
-      run: cargo fmt --all -- --check
-    - name: ./script/clippy
-      run: ./script/clippy
-    timeout-minutes: 60
-  run_tests_windows:
-    if: (github.repository_owner == 'zed-industries' || github.repository_owner == 'zed-extensions')
-    runs-on: self-32vcpu-windows-2022
+        fetch-tags: true
+    - id: check
+      name: release_nightly::check_nightly_tag
+      run: |
+        NIGHTLY_SHA=$(git rev-parse "nightly" 2>/dev/null || echo "")
+        if [ "$NIGHTLY_SHA" = "$GITHUB_SHA" ]; then
+            echo "Nightly tag already points to current commit. Skipping."
+            echo "skip=true" >> "$GITHUB_OUTPUT"
+        else
+            echo "skip=false" >> "$GITHUB_OUTPUT"
+        fi
+    outputs:
+      skip: ${{ steps.check.outputs.skip }}
+    timeout-minutes: 5
+  run_tests_linux:
+    needs:
+    - check_nightly_tag
+    if: (github.repository_owner == 'zed-industries' || github.repository_owner == 'zed-extensions') && needs.check_nightly_tag.outputs.skip != 'true'
+    runs-on: namespace-profile-16x32-ubuntu-2204
+    env:
+      CC: clang
+      CXX: clang++
     steps:
     - name: steps::checkout_repo
       uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd
@@ -35,19 +46,27 @@ jobs:
         clean: false
     - name: steps::setup_cargo_config
       run: |
-        New-Item -ItemType Directory -Path "./../.cargo" -Force
-        Copy-Item -Path "./.cargo/ci-config.toml" -Destination "./../.cargo/config.toml"
-      shell: pwsh
+        mkdir -p ./../.cargo
+        cp ./.cargo/ci-config.toml ./../.cargo/config.toml
+    - name: steps::cache_rust_dependencies_namespace
+      uses: namespacelabs/nscloud-cache-action@a90bb5d4b27522ce881c6e98eebd7d7e6d1653f9
+      with:
+        cache: rust
+        path: ~/.rustup
+    - name: steps::setup_linux
+      run: ./script/linux
+    - name: steps::download_wasi_sdk
+      run: ./script/download-wasi-sdk
     - name: steps::setup_node
       uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020
       with:
         node-version: '20'
+    - name: steps::cargo_install_nextest
+      uses: taiki-e/install-action@921e2c9f7148d7ba14cd819f417db338f63e733c
     - name: steps::clear_target_dir_if_large
-      run: ./script/clear-target-dir-if-larger-than.ps1 350 200
-      shell: pwsh
+      run: ./script/clear-target-dir-if-larger-than 350 200
     - name: steps::setup_sccache
-      run: ./script/setup-sccache.ps1
-      shell: pwsh
+      run: ./script/setup-sccache
       env:
         R2_ACCOUNT_ID: ${{ secrets.R2_ACCOUNT_ID }}
         R2_ACCESS_KEY_ID: ${{ secrets.R2_ACCESS_KEY_ID }}
@@ -55,49 +74,24 @@ jobs:
         SCCACHE_BUCKET: sccache-zed
     - name: steps::cargo_nextest
       run: cargo nextest run --workspace --no-fail-fast --no-tests=warn
-      shell: pwsh
     - name: steps::show_sccache_stats
-      run: if ($env:RUSTC_WRAPPER) { & $env:RUSTC_WRAPPER --show-stats }; exit 0
-      shell: pwsh
+      run: sccache --show-stats || true
     - name: steps::cleanup_cargo_config
       if: always()
       run: |
-        Remove-Item -Recurse -Path "./../.cargo" -Force -ErrorAction SilentlyContinue
-      shell: pwsh
-    timeout-minutes: 60
-  clippy_windows:
-    if: (github.repository_owner == 'zed-industries' || github.repository_owner == 'zed-extensions')
-    runs-on: self-32vcpu-windows-2022
-    steps:
-    - name: steps::checkout_repo
-      uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd
-      with:
-        clean: false
-    - name: steps::setup_cargo_config
-      run: |
-        New-Item -ItemType Directory -Path "./../.cargo" -Force
-        Copy-Item -Path "./.cargo/ci-config.toml" -Destination "./../.cargo/config.toml"
-      shell: pwsh
-    - name: steps::setup_sccache
-      run: ./script/setup-sccache.ps1
-      shell: pwsh
-      env:
-        R2_ACCOUNT_ID: ${{ secrets.R2_ACCOUNT_ID }}
-        R2_ACCESS_KEY_ID: ${{ secrets.R2_ACCESS_KEY_ID }}
-        R2_SECRET_ACCESS_KEY: ${{ secrets.R2_SECRET_ACCESS_KEY }}
-        SCCACHE_BUCKET: sccache-zed
-    - name: steps::clippy
-      run: ./script/clippy.ps1
-      shell: pwsh
-    - name: steps::show_sccache_stats
-      run: if ($env:RUSTC_WRAPPER) { & $env:RUSTC_WRAPPER --show-stats }; exit 0
-      shell: pwsh
+        rm -rf ./../.cargo
     timeout-minutes: 60
+    services:
+      postgres:
+        image: postgres:15
+        env:
+          POSTGRES_HOST_AUTH_METHOD: trust
+        ports:
+        - 5432:5432
+        options: --health-cmd pg_isready --health-interval 500ms --health-timeout 5s --health-retries 10
   bundle_linux_aarch64:
     needs:
-    - check_style
-    - run_tests_windows
-    - clippy_windows
+    - run_tests_linux
     runs-on: namespace-profile-8x32-ubuntu-2004-arm-m4
     env:
       CARGO_INCREMENTAL: 0
@@ -126,14 +120,14 @@ jobs:
       run: ./script/download-wasi-sdk
     - name: ./script/bundle-linux
       run: ./script/bundle-linux
-    - name: '@actions/upload-artifact zed-linux-aarch64.tar.gz'
-      uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4
+    - name: run_bundling::upload_artifact
+      uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a
       with:
         name: zed-linux-aarch64.tar.gz
         path: target/release/zed-linux-aarch64.tar.gz
         if-no-files-found: error
-    - name: '@actions/upload-artifact zed-remote-server-linux-aarch64.gz'
-      uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4
+    - name: run_bundling::upload_artifact
+      uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a
       with:
         name: zed-remote-server-linux-aarch64.gz
         path: target/zed-remote-server-linux-aarch64.gz
@@ -141,9 +135,7 @@ jobs:
     timeout-minutes: 60
   bundle_linux_x86_64:
     needs:
-    - check_style
-    - run_tests_windows
-    - clippy_windows
+    - run_tests_linux
     runs-on: namespace-profile-32x64-ubuntu-2004
     env:
       CARGO_INCREMENTAL: 0
@@ -172,14 +164,14 @@ jobs:
       run: ./script/download-wasi-sdk
     - name: ./script/bundle-linux
       run: ./script/bundle-linux
-    - name: '@actions/upload-artifact zed-linux-x86_64.tar.gz'
-      uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4
+    - name: run_bundling::upload_artifact
+      uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a
       with:
         name: zed-linux-x86_64.tar.gz
         path: target/release/zed-linux-x86_64.tar.gz
         if-no-files-found: error
-    - name: '@actions/upload-artifact zed-remote-server-linux-x86_64.gz'
-      uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4
+    - name: run_bundling::upload_artifact
+      uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a
       with:
         name: zed-remote-server-linux-x86_64.gz
         path: target/zed-remote-server-linux-x86_64.gz
@@ -187,9 +179,7 @@ jobs:
     timeout-minutes: 60
   bundle_mac_aarch64:
     needs:
-    - check_style
-    - run_tests_windows
-    - clippy_windows
+    - run_tests_linux
     runs-on: namespace-profile-mac-large
     env:
       CARGO_INCREMENTAL: 0
@@ -223,14 +213,14 @@ jobs:
       run: ./script/clear-target-dir-if-larger-than 350 200
     - name: run_bundling::bundle_mac::bundle_mac
       run: ./script/bundle-mac aarch64-apple-darwin
-    - name: '@actions/upload-artifact Zed-aarch64.dmg'
-      uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4
+    - name: run_bundling::upload_artifact
+      uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a
       with:
         name: Zed-aarch64.dmg
         path: target/aarch64-apple-darwin/release/Zed-aarch64.dmg
         if-no-files-found: error
-    - name: '@actions/upload-artifact zed-remote-server-macos-aarch64.gz'
-      uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4
+    - name: run_bundling::upload_artifact
+      uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a
       with:
         name: zed-remote-server-macos-aarch64.gz
         path: target/zed-remote-server-macos-aarch64.gz
@@ -238,9 +228,7 @@ jobs:
     timeout-minutes: 60
   bundle_mac_x86_64:
     needs:
-    - check_style
-    - run_tests_windows
-    - clippy_windows
+    - run_tests_linux
     runs-on: namespace-profile-mac-large
     env:
       CARGO_INCREMENTAL: 0
@@ -274,14 +262,14 @@ jobs:
       run: ./script/clear-target-dir-if-larger-than 350 200
     - name: run_bundling::bundle_mac::bundle_mac
       run: ./script/bundle-mac x86_64-apple-darwin
-    - name: '@actions/upload-artifact Zed-x86_64.dmg'
-      uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4
+    - name: run_bundling::upload_artifact
+      uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a
       with:
         name: Zed-x86_64.dmg
         path: target/x86_64-apple-darwin/release/Zed-x86_64.dmg
         if-no-files-found: error
-    - name: '@actions/upload-artifact zed-remote-server-macos-x86_64.gz'
-      uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4
+    - name: run_bundling::upload_artifact
+      uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a
       with:
         name: zed-remote-server-macos-x86_64.gz
         path: target/zed-remote-server-macos-x86_64.gz
@@ -289,9 +277,7 @@ jobs:
     timeout-minutes: 60
   bundle_windows_aarch64:
     needs:
-    - check_style
-    - run_tests_windows
-    - clippy_windows
+    - run_tests_linux
     runs-on: self-32vcpu-windows-2022
     env:
       CARGO_INCREMENTAL: 0
@@ -327,14 +313,14 @@ jobs:
       run: script/bundle-windows.ps1 -Architecture aarch64
       shell: pwsh
       working-directory: ${{ env.ZED_WORKSPACE }}
-    - name: '@actions/upload-artifact Zed-aarch64.exe'
-      uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4
+    - name: run_bundling::upload_artifact
+      uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a
       with:
         name: Zed-aarch64.exe
         path: target/Zed-aarch64.exe
         if-no-files-found: error
-    - name: '@actions/upload-artifact zed-remote-server-windows-aarch64.zip'
-      uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4
+    - name: run_bundling::upload_artifact
+      uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a
       with:
         name: zed-remote-server-windows-aarch64.zip
         path: target/zed-remote-server-windows-aarch64.zip
@@ -342,9 +328,7 @@ jobs:
     timeout-minutes: 60
   bundle_windows_x86_64:
     needs:
-    - check_style
-    - run_tests_windows
-    - clippy_windows
+    - run_tests_linux
     runs-on: self-32vcpu-windows-2022
     env:
       CARGO_INCREMENTAL: 0
@@ -380,14 +364,14 @@ jobs:
       run: script/bundle-windows.ps1 -Architecture x86_64
       shell: pwsh
       working-directory: ${{ env.ZED_WORKSPACE }}
-    - name: '@actions/upload-artifact Zed-x86_64.exe'
-      uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4
+    - name: run_bundling::upload_artifact
+      uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a
       with:
         name: Zed-x86_64.exe
         path: target/Zed-x86_64.exe
         if-no-files-found: error
-    - name: '@actions/upload-artifact zed-remote-server-windows-x86_64.zip'
-      uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4
+    - name: run_bundling::upload_artifact
+      uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a
       with:
         name: zed-remote-server-windows-x86_64.zip
         path: target/zed-remote-server-windows-x86_64.zip
@@ -395,8 +379,7 @@ jobs:
     timeout-minutes: 60
   build_nix_linux_x86_64:
     needs:
-    - check_style
-    - run_tests_windows
+    - run_tests_linux
     if: (github.repository_owner == 'zed-industries' || github.repository_owner == 'zed-extensions')
     runs-on: namespace-profile-32x64-ubuntu-2004
     env:
@@ -429,8 +412,7 @@ jobs:
     continue-on-error: true
   build_nix_mac_aarch64:
     needs:
-    - check_style
-    - run_tests_windows
+    - run_tests_linux
     if: (github.repository_owner == 'zed-industries' || github.repository_owner == 'zed-extensions')
     runs-on: namespace-profile-mac-large
     env:
@@ -487,13 +469,20 @@ jobs:
     if: (github.repository_owner == 'zed-industries' || github.repository_owner == 'zed-extensions')
     runs-on: namespace-profile-4x8-ubuntu-2204
     steps:
+    - id: generate-token
+      name: steps::authenticate_as_zippy
+      uses: actions/create-github-app-token@f8d387b68d61c58ab83c6c016672934102569859
+      with:
+        app-id: ${{ secrets.ZED_ZIPPY_APP_ID }}
+        private-key: ${{ secrets.ZED_ZIPPY_APP_PRIVATE_KEY }}
+        permission-contents: write
     - name: steps::checkout_repo
       uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd
       with:
         clean: false
-        fetch-depth: 0
+        fetch-tags: true
     - name: release::download_workflow_artifacts
-      uses: actions/download-artifact@018cc2cf5baa6db3ef3c5f8a56943fffe632ef53
+      uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c
       with:
         path: ./artifacts/
     - name: ls -lR ./artifacts
@@ -519,16 +508,18 @@ jobs:
       env:
         DIGITALOCEAN_SPACES_ACCESS_KEY: ${{ secrets.DIGITALOCEAN_SPACES_ACCESS_KEY }}
         DIGITALOCEAN_SPACES_SECRET_KEY: ${{ secrets.DIGITALOCEAN_SPACES_SECRET_KEY }}
-    - name: release_nightly::update_nightly_tag_job::update_nightly_tag
-      run: |
-        if [ "$(git rev-parse nightly)" = "$(git rev-parse HEAD)" ]; then
-          echo "Nightly tag already points to current commit. Skipping tagging."
-          exit 0
-        fi
-        git config user.name github-actions
-        git config user.email github-actions@github.com
-        git tag -f nightly
-        git push origin nightly --force
+    - name: steps::update_tag
+      uses: actions/github-script@f28e40c7f34bde8b3046d885e986cb6290c5673b
+      with:
+        script: |
+          github.rest.git.updateRef({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              ref: 'tags/nightly',
+              sha: context.sha,
+              force: true
+          })
+        github-token: ${{ steps.generate-token.outputs.token }}
     - name: release::create_sentry_release
       uses: getsentry/action-release@526942b68292201ac6bbb99b9a0747d4abee354c
       with:
@@ -554,6 +545,9 @@ jobs:
       env:
         SLACK_WEBHOOK: ${{ secrets.SLACK_WEBHOOK_WORKFLOW_FAILURES }}
         SLACK_MESSAGE: '❌ ${{ github.workflow }} failed: ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}'
+concurrency:
+  group: release-nightly
+  cancel-in-progress: true
 defaults:
   run:
     shell: bash -euxo pipefail {0}

.github/workflows/run_bundling.yml

@@ -36,14 +36,14 @@ jobs:
       run: ./script/download-wasi-sdk
     - name: ./script/bundle-linux
       run: ./script/bundle-linux
-    - name: '@actions/upload-artifact zed-linux-aarch64.tar.gz'
-      uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4
+    - name: run_bundling::upload_artifact
+      uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a
       with:
         name: zed-linux-aarch64.tar.gz
         path: target/release/zed-linux-aarch64.tar.gz
         if-no-files-found: error
-    - name: '@actions/upload-artifact zed-remote-server-linux-aarch64.gz'
-      uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4
+    - name: run_bundling::upload_artifact
+      uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a
       with:
         name: zed-remote-server-linux-aarch64.gz
         path: target/zed-remote-server-linux-aarch64.gz
@@ -75,14 +75,14 @@ jobs:
       run: ./script/download-wasi-sdk
     - name: ./script/bundle-linux
       run: ./script/bundle-linux
-    - name: '@actions/upload-artifact zed-linux-x86_64.tar.gz'
-      uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4
+    - name: run_bundling::upload_artifact
+      uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a
       with:
         name: zed-linux-x86_64.tar.gz
         path: target/release/zed-linux-x86_64.tar.gz
         if-no-files-found: error
-    - name: '@actions/upload-artifact zed-remote-server-linux-x86_64.gz'
-      uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4
+    - name: run_bundling::upload_artifact
+      uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a
       with:
         name: zed-remote-server-linux-x86_64.gz
         path: target/zed-remote-server-linux-x86_64.gz
@@ -119,14 +119,14 @@ jobs:
       run: ./script/clear-target-dir-if-larger-than 350 200
     - name: run_bundling::bundle_mac::bundle_mac
       run: ./script/bundle-mac aarch64-apple-darwin
-    - name: '@actions/upload-artifact Zed-aarch64.dmg'
-      uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4
+    - name: run_bundling::upload_artifact
+      uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a
       with:
         name: Zed-aarch64.dmg
         path: target/aarch64-apple-darwin/release/Zed-aarch64.dmg
         if-no-files-found: error
-    - name: '@actions/upload-artifact zed-remote-server-macos-aarch64.gz'
-      uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4
+    - name: run_bundling::upload_artifact
+      uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a
       with:
         name: zed-remote-server-macos-aarch64.gz
         path: target/zed-remote-server-macos-aarch64.gz
@@ -163,14 +163,14 @@ jobs:
       run: ./script/clear-target-dir-if-larger-than 350 200
     - name: run_bundling::bundle_mac::bundle_mac
       run: ./script/bundle-mac x86_64-apple-darwin
-    - name: '@actions/upload-artifact Zed-x86_64.dmg'
-      uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4
+    - name: run_bundling::upload_artifact
+      uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a
       with:
         name: Zed-x86_64.dmg
         path: target/x86_64-apple-darwin/release/Zed-x86_64.dmg
         if-no-files-found: error
-    - name: '@actions/upload-artifact zed-remote-server-macos-x86_64.gz'
-      uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4
+    - name: run_bundling::upload_artifact
+      uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a
       with:
         name: zed-remote-server-macos-x86_64.gz
         path: target/zed-remote-server-macos-x86_64.gz
@@ -207,14 +207,14 @@ jobs:
       run: script/bundle-windows.ps1 -Architecture aarch64
       shell: pwsh
       working-directory: ${{ env.ZED_WORKSPACE }}
-    - name: '@actions/upload-artifact Zed-aarch64.exe'
-      uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4
+    - name: run_bundling::upload_artifact
+      uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a
       with:
         name: Zed-aarch64.exe
         path: target/Zed-aarch64.exe
         if-no-files-found: error
-    - name: '@actions/upload-artifact zed-remote-server-windows-aarch64.zip'
-      uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4
+    - name: run_bundling::upload_artifact
+      uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a
       with:
         name: zed-remote-server-windows-aarch64.zip
         path: target/zed-remote-server-windows-aarch64.zip
@@ -251,98 +251,19 @@ jobs:
       run: script/bundle-windows.ps1 -Architecture x86_64
       shell: pwsh
       working-directory: ${{ env.ZED_WORKSPACE }}
-    - name: '@actions/upload-artifact Zed-x86_64.exe'
-      uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4
+    - name: run_bundling::upload_artifact
+      uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a
       with:
         name: Zed-x86_64.exe
         path: target/Zed-x86_64.exe
         if-no-files-found: error
-    - name: '@actions/upload-artifact zed-remote-server-windows-x86_64.zip'
-      uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4
+    - name: run_bundling::upload_artifact
+      uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a
       with:
         name: zed-remote-server-windows-x86_64.zip
         path: target/zed-remote-server-windows-x86_64.zip
         if-no-files-found: error
     timeout-minutes: 60
-  build_nix_linux_x86_64:
-    if: (github.repository_owner == 'zed-industries' || github.repository_owner == 'zed-extensions') && ((github.event.action == 'labeled' && github.event.label.name == 'run-bundling') || (github.event.action == 'synchronize' && contains(github.event.pull_request.labels.*.name, 'run-bundling')))
-    runs-on: namespace-profile-32x64-ubuntu-2004
-    env:
-      ZED_CLIENT_CHECKSUM_SEED: ${{ secrets.ZED_CLIENT_CHECKSUM_SEED }}
-      ZED_MINIDUMP_ENDPOINT: ${{ secrets.ZED_SENTRY_MINIDUMP_ENDPOINT }}
-      ZED_CLOUD_PROVIDER_ADDITIONAL_MODELS_JSON: ${{ secrets.ZED_CLOUD_PROVIDER_ADDITIONAL_MODELS_JSON }}
-      GIT_LFS_SKIP_SMUDGE: '1'
-    steps:
-    - name: steps::checkout_repo
-      uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd
-      with:
-        clean: false
-    - name: steps::cache_nix_dependencies_namespace
-      uses: namespacelabs/nscloud-cache-action@a90bb5d4b27522ce881c6e98eebd7d7e6d1653f9
-      with:
-        cache: nix
-    - name: nix_build::build_nix::install_nix
-      uses: cachix/install-nix-action@02a151ada4993995686f9ed4f1be7cfbb229e56f
-      with:
-        github_access_token: ${{ secrets.GITHUB_TOKEN }}
-    - name: nix_build::build_nix::cachix_action
-      uses: cachix/cachix-action@0fc020193b5a1fa3ac4575aa3a7d3aa6a35435ad
-      with:
-        name: zed
-        authToken: ${{ secrets.CACHIX_AUTH_TOKEN }}
-        cachixArgs: -v
-        pushFilter: -zed-editor-[0-9.]*
-    - name: nix_build::build_nix::build
-      run: nix build .#default -L --accept-flake-config
-    timeout-minutes: 60
-    continue-on-error: true
-  build_nix_mac_aarch64:
-    if: (github.repository_owner == 'zed-industries' || github.repository_owner == 'zed-extensions') && ((github.event.action == 'labeled' && github.event.label.name == 'run-bundling') || (github.event.action == 'synchronize' && contains(github.event.pull_request.labels.*.name, 'run-bundling')))
-    runs-on: namespace-profile-mac-large
-    env:
-      ZED_CLIENT_CHECKSUM_SEED: ${{ secrets.ZED_CLIENT_CHECKSUM_SEED }}
-      ZED_MINIDUMP_ENDPOINT: ${{ secrets.ZED_SENTRY_MINIDUMP_ENDPOINT }}
-      ZED_CLOUD_PROVIDER_ADDITIONAL_MODELS_JSON: ${{ secrets.ZED_CLOUD_PROVIDER_ADDITIONAL_MODELS_JSON }}
-      GIT_LFS_SKIP_SMUDGE: '1'
-    steps:
-    - name: steps::checkout_repo
-      uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd
-      with:
-        clean: false
-    - name: steps::cache_nix_store_macos
-      uses: namespacelabs/nscloud-cache-action@a90bb5d4b27522ce881c6e98eebd7d7e6d1653f9
-      with:
-        path: ~/nix-cache
-    - name: nix_build::build_nix::install_nix
-      uses: cachix/install-nix-action@02a151ada4993995686f9ed4f1be7cfbb229e56f
-      with:
-        github_access_token: ${{ secrets.GITHUB_TOKEN }}
-    - name: nix_build::build_nix::configure_local_nix_cache
-      run: |
-        mkdir -p ~/nix-cache
-        echo "extra-substituters = file://$HOME/nix-cache?priority=10" | sudo tee -a /etc/nix/nix.conf
-        echo "require-sigs = false" | sudo tee -a /etc/nix/nix.conf
-        sudo launchctl kickstart -k system/org.nixos.nix-daemon
-    - name: nix_build::build_nix::cachix_action
-      uses: cachix/cachix-action@0fc020193b5a1fa3ac4575aa3a7d3aa6a35435ad
-      with:
-        name: zed
-        authToken: ${{ secrets.CACHIX_AUTH_TOKEN }}
-        cachixArgs: -v
-        pushFilter: -zed-editor-[0-9.]*
-    - name: nix_build::build_nix::build
-      run: nix build .#default -L --accept-flake-config
-    - name: nix_build::build_nix::export_to_local_nix_cache
-      if: always()
-      run: |
-        if [ -L result ]; then
-          echo "Copying build closure to local binary cache..."
-          nix copy --to "file://$HOME/nix-cache" ./result || echo "Warning: nix copy to local cache failed"
-        else
-          echo "No build result found, skipping cache export."
-        fi
-    timeout-minutes: 60
-    continue-on-error: true
 concurrency:
   group: ${{ github.workflow }}-${{ github.head_ref || github.ref }}
   cancel-in-progress: true

.github/workflows/run_tests.yml

@@ -448,6 +448,34 @@ jobs:
       run: |
         rm -rf ./../.cargo
     timeout-minutes: 60
+  miri_scheduler:
+    needs:
+    - orchestrate
+    if: needs.orchestrate.outputs.run_tests == 'true' && github.event_name != 'merge_group'
+    runs-on: namespace-profile-16x32-ubuntu-2204
+    steps:
+    - name: steps::checkout_repo
+      uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd
+      with:
+        clean: false
+    - name: steps::setup_cargo_config
+      run: |
+        mkdir -p ./../.cargo
+        cp ./.cargo/ci-config.toml ./../.cargo/config.toml
+    - name: steps::cache_rust_dependencies_namespace
+      uses: namespacelabs/nscloud-cache-action@a90bb5d4b27522ce881c6e98eebd7d7e6d1653f9
+      with:
+        cache: rust
+        path: ~/.rustup
+    - name: run_tests::miri_scheduler::install_miri
+      run: rustup toolchain install nightly --profile minimal --component miri --component rust-src
+    - name: run_tests::miri_scheduler::run_scheduler_tests_under_miri
+      run: cargo +nightly -q miri test -p scheduler
+    - name: steps::cleanup_cargo_config
+      if: always()
+      run: |
+        rm -rf ./../.cargo
+    timeout-minutes: 60
   doctests:
     needs:
     - orchestrate
@@ -640,6 +668,7 @@ jobs:
     runs-on: namespace-profile-16x32-ubuntu-2204
     env:
       DOCS_AMPLITUDE_API_KEY: ${{ secrets.DOCS_AMPLITUDE_API_KEY }}
+      DOCS_CONSENT_IO_INSTANCE: ${{ secrets.DOCS_CONSENT_IO_INSTANCE }}
       CC: clang
       CXX: clang++
     steps:
@@ -804,6 +833,7 @@ jobs:
     - run_tests_windows
     - run_tests_linux
     - run_tests_mac
+    - miri_scheduler
     - doctests
     - check_workspace_binaries
     - build_visual_tests_binary
@@ -835,6 +865,7 @@ jobs:
         check_result "run_tests_windows" "$RESULT_RUN_TESTS_WINDOWS"
         check_result "run_tests_linux" "$RESULT_RUN_TESTS_LINUX"
         check_result "run_tests_mac" "$RESULT_RUN_TESTS_MAC"
+        check_result "miri_scheduler" "$RESULT_MIRI_SCHEDULER"
         check_result "doctests" "$RESULT_DOCTESTS"
         check_result "check_workspace_binaries" "$RESULT_CHECK_WORKSPACE_BINARIES"
         check_result "build_visual_tests_binary" "$RESULT_BUILD_VISUAL_TESTS_BINARY"
@@ -856,6 +887,7 @@ jobs:
         RESULT_RUN_TESTS_WINDOWS: ${{ needs.run_tests_windows.result }}
         RESULT_RUN_TESTS_LINUX: ${{ needs.run_tests_linux.result }}
         RESULT_RUN_TESTS_MAC: ${{ needs.run_tests_mac.result }}
+        RESULT_MIRI_SCHEDULER: ${{ needs.miri_scheduler.result }}
         RESULT_DOCTESTS: ${{ needs.doctests.result }}
         RESULT_CHECK_WORKSPACE_BINARIES: ${{ needs.check_workspace_binaries.result }}
         RESULT_BUILD_VISUAL_TESTS_BINARY: ${{ needs.build_visual_tests_binary.result }}

.github/workflows/track_duplicate_bot_effectiveness.yml

@@ -16,8 +16,9 @@ jobs:
       github.event_name == 'issues' &&
       github.repository == 'zed-industries/zed' &&
       github.event.issue.pull_request == null &&
-      github.event.issue.type != null &&
-      (github.event.issue.type.name == 'Bug' || github.event.issue.type.name == 'Crash')
+      (github.event.issue.type == null ||
+       github.event.issue.type.name == 'Bug' ||
+       github.event.issue.type.name == 'Crash')
     runs-on: ubuntu-latest
     timeout-minutes: 5
     steps:

.gitignore

@@ -55,3 +55,6 @@ crates/docs_preprocessor/actions.json
 # Local documentation audit files
 /december-2025-releases.md
 /docs/december-2025-documentation-gaps.md
+
+# NixOS integration test state
+.nixos-test-history

Cargo.toml

@@ -130,16 +130,17 @@ members = [
     "crates/lsp",
     "crates/markdown",
     "crates/markdown_preview",
+    "crates/mermaid_render",
     "crates/media",
     "crates/menu",
     "crates/migrator",
     "crates/miniprofiler_ui",
     "crates/mistral",
     "crates/multi_buffer",
-    "crates/nc",
     "crates/net",
     "crates/node_runtime",
     "crates/notifications",
+    "crates/oauth_callback_server",
     "crates/ollama",
     "crates/onboarding",
     "crates/opencode",
@@ -170,7 +171,8 @@ members = [
     "crates/reqwest_client",
     "crates/rope",
     "crates/rpc",
-    "crates/rules_library",
+    "crates/sandbox",
+    "crates/skill_creator",
     "crates/scheduler",
     "crates/schema_generator",
     "crates/search",
@@ -387,18 +389,18 @@ lmstudio = { path = "crates/lmstudio" }
 lsp = { path = "crates/lsp" }
 markdown = { path = "crates/markdown" }
 markdown_preview = { path = "crates/markdown_preview" }
+mermaid_render = { path = "crates/mermaid_render" }
 svg_preview = { path = "crates/svg_preview" }
 media = { path = "crates/media" }
 menu = { path = "crates/menu" }
-mermaid-rs-renderer = { git = "https://github.com/zed-industries/mermaid-rs-renderer", rev = "782b89a7da3f0e91e51f98d00a93acba679be6fb", default-features = false }
 migrator = { path = "crates/migrator" }
 mistral = { path = "crates/mistral" }
 multi_buffer = { path = "crates/multi_buffer" }
 miniprofiler_ui = { path = "crates/miniprofiler_ui" }
-nc = { path = "crates/nc" }
 net = { path = "crates/net" }
 node_runtime = { path = "crates/node_runtime" }
 notifications = { path = "crates/notifications" }
+oauth_callback_server = { path = "crates/oauth_callback_server" }
 ollama = { path = "crates/ollama" }
 onboarding = { path = "crates/onboarding" }
 opencode = { path = "crates/opencode" }
@@ -429,8 +431,9 @@ reqwest_client = { path = "crates/reqwest_client" }
 rodio = { git = "https://github.com/RustAudio/rodio", rev = "e50e726ddd0292f6ef9de0dda6b90af4ed1fb66a", features = ["wav", "playback", "wav_output", "recording"] }
 rope = { path = "crates/rope" }
 rpc = { path = "crates/rpc" }
-rules_library = { path = "crates/rules_library" }
+skill_creator = { path = "crates/skill_creator" }
 scheduler = { path = "crates/scheduler" }
+sandbox = { path = "crates/sandbox" }
 search = { path = "crates/search" }
 session = { path = "crates/session" }
 sidebar = { path = "crates/sidebar" }
@@ -498,9 +501,13 @@ ztracing_macro = { path = "crates/ztracing_macro" }
 # External crates
 #
 
-agent-client-protocol = { version = "=0.11.1", features = ["unstable"] }
+accesskit = "0.24.0"
+accesskit_macos = "0.26.0"
+accesskit_unix = "0.21.0"
+accesskit_windows = "0.32.1"
+agent-client-protocol = { version = "=0.12.1", features = ["unstable"] }
 aho-corasick = "1.1"
-alacritty_terminal = { git = "https://github.com/zed-industries/alacritty", rev = "9d9640d4" }
+alacritty_terminal = { git = "https://github.com/zed-industries/alacritty", rev = "fcf32feacb367b75ec84dd40f041e4fd411d3cc1" }
 any_vec = "0.14"
 anyhow = "1.0.86"
 ashpd = { version = "0.13", default-features = false, features = [
@@ -551,14 +558,15 @@ circular-buffer = "1.0"
 clap = { version = "4.4", features = ["derive", "wrap_help"] }
 cocoa = "=0.26.0"
 cocoa-foundation = "=0.2.0"
-convert_case = "0.8.0"
+const_format = "0.2"
+convert_case = "0.11.0"
 core-foundation = "=0.10.0"
 core-foundation-sys = "0.8.6"
 core-video = { version = "0.5.2", features = ["metal"] }
 cpal = "0.17"
 crash-handler = "0.7"
 criterion = { version = "0.5", features = ["html_reports"] }
-ctor = "0.4.0"
+ctor = "1.0.6"
 dap-types = { git = "https://github.com/zed-industries/dap-types", rev = "1b461b310481d01e02b2603c16d7144b926339f8" }
 dashmap = "6.0"
 derive_more = { version = "2.1.1", features = [
@@ -587,7 +595,7 @@ futures = "0.3.32"
 futures-concurrency = "7.7.1"
 futures-lite = "1.13"
 gh-workflow = { git = "https://github.com/zed-industries/gh-workflow", rev = "37f3c0575d379c218a9c455ee67585184e40d43f" }
-git2 = { version = "0.20.1", default-features = false, features = ["vendored-libgit2"] }
+git2 = { version = "0.21.0", default-features = false, features = ["vendored-libgit2", "unstable-sha256"] }
 globset = "0.4"
 heapless = "0.9.2"
 handlebars = "4.3"
@@ -617,6 +625,7 @@ linkify = "0.10.0"
 libwebrtc = "0.3.26"
 livekit = { version = "0.7.32", features = ["tokio", "rustls-tls-native-roots"] }
 log = { version = "0.4.16", features = ["kv_unstable_serde", "serde"] }
+lru = "0.16"
 lsp-types = { git = "https://github.com/zed-industries/lsp-types", rev = "f4dfa89a21ca35cd929b70354b1583fabae325f8" }
 mach2 = "0.5"
 markup5ever_rcdom = "0.3.0"
@@ -718,6 +727,7 @@ serde_json_lenient = { version = "0.2", features = [
     "preserve_order",
     "raw_value",
 ] }
+serde_yaml = "0.9.34"
 serde_path_to_error = "0.1.17"
 serde_urlencoded = "0.7"
 sha2 = "0.10"
@@ -759,7 +769,7 @@ toml_edit = { version = "0.22", default-features = false, features = [
     "serde",
 ] }
 tower-http = "0.4.4"
-tree-sitter = { version = "0.26.8", features = ["wasm"] }
+tree-sitter = { version = "0.26.9", features = ["wasm"] }
 tree-sitter-bash = "0.25.1"
 tree-sitter-c = "0.24.1"
 tree-sitter-cpp = { git = "https://github.com/tree-sitter/tree-sitter-cpp", rev = "5cb9b693cfd7bfacab1d9ff4acac1a4150700609" }
@@ -809,7 +819,7 @@ which = "6.0.0"
 wasm-bindgen = "0.2.120"
 web-time = "1.1.0"
 webrtc-sys = "0.3.23"
-wgpu = { git = "https://github.com/zed-industries/wgpu.git", branch = "v29" }
+wgpu = { git = "https://github.com/zed-industries/wgpu.git", rev = "357a0c56e0070480ad9daea5d2eaa83150b79e88" }
 windows-core = "0.61"
 yaml-rust2 = "0.8"
 yawc = "0.2.5"
@@ -881,9 +891,9 @@ notify = { git = "https://github.com/zed-industries/notify.git", rev = "ce58c24c
 notify-types = { git = "https://github.com/zed-industries/notify.git", rev = "ce58c24cad542c28e04ced02e20325a4ec28a31d" }
 windows-capture = { git = "https://github.com/zed-industries/windows-capture.git", rev = "f0d6c1b6691db75461b732f6d5ff56eed002eeb9" }
 calloop = { git = "https://github.com/zed-industries/calloop" }
-livekit = { git = "https://github.com/zed-industries/livekit-rust-sdks", rev = "147fbca3d4b592d96d33f5e6a84b59fc0b5d9bf1" }
-libwebrtc = { git = "https://github.com/zed-industries/livekit-rust-sdks", rev = "147fbca3d4b592d96d33f5e6a84b59fc0b5d9bf1" }
-webrtc-sys = { git = "https://github.com/zed-industries/livekit-rust-sdks", rev = "147fbca3d4b592d96d33f5e6a84b59fc0b5d9bf1" }
+livekit = { git = "https://github.com/zed-industries/livekit-rust-sdks", rev = "c3a55bbc207008f1ca3474b6037fdd3c443cad0f" }
+libwebrtc = { git = "https://github.com/zed-industries/livekit-rust-sdks", rev = "c3a55bbc207008f1ca3474b6037fdd3c443cad0f" }
+webrtc-sys = { git = "https://github.com/zed-industries/livekit-rust-sdks", rev = "c3a55bbc207008f1ca3474b6037fdd3c443cad0f" }
 
 [profile.dev]
 split-debuginfo = "unpacked"

LICENSE-AGPL

@@ -1,788 +0,0 @@
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README.md

@@ -13,7 +13,7 @@ On macOS, Linux, and Windows you can [download Zed directly](https://zed.dev/dow
 
 Other platforms are not yet available:
 
-- Web ([tracking issue](https://github.com/zed-industries/zed/issues/5396))
+- Web ([tracking discussion](https://github.com/zed-industries/zed/discussions/26195))
 
 ### Developing Zed
 
@@ -29,6 +29,8 @@ Also... we're hiring! Check out our [jobs](https://zed.dev/jobs) page for open r
 
 ### Licensing
 
+Zed source code is licensed primarily under GPL-3.0-or-later, with Apache-2.0 components where marked.
+
 License information for third party dependencies must be correctly provided for CI to pass.
 
 We use [`cargo-about`](https://github.com/EmbarkStudios/cargo-about) to automatically comply with open source licenses. If CI is failing, check the following:

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+</svg>

assets/icons/gitlab.svg

@@ -0,0 +1,3 @@
+<svg width="16" height="16" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg">
+<path d="M14.0228 6.75008L14.0053 6.70533L12.3092 2.27915C12.2747 2.19237 12.2136 2.11876 12.1347 2.06887C12.0557 2.01987 11.9636 1.99627 11.8708 2.00128C11.7779 2.00628 11.6889 2.03964 11.6156 2.09686C11.5432 2.15571 11.4906 2.23546 11.4651 2.32525L10.32 5.82877H5.68303L4.53784 2.32525C4.513 2.23496 4.46031 2.1548 4.38727 2.09618C4.31401 2.03898 4.22496 2.00564 4.13214 2.00065C4.03932 1.99567 3.94721 2.01928 3.86824 2.0683C3.78948 2.11837 3.72842 2.1919 3.69368 2.27852L1.99452 6.70273L1.97764 6.74748C1.73349 7.38539 1.70335 8.08539 1.89177 8.74192C2.08018 9.39845 2.47694 9.97594 3.02221 10.3873L3.02808 10.3918L3.04365 10.4029L5.62716 12.3376L6.90542 13.305L7.68395 13.8928C7.77502 13.9619 7.88623 13.9994 8.00058 13.9994C8.11493 13.9994 8.22613 13.9619 8.31721 13.8928L9.09574 13.305L10.3739 12.3376L12.973 10.3912L12.9795 10.386C13.5236 9.97456 13.9194 9.39768 14.1075 8.74203C14.2957 8.08638 14.2659 7.38738 14.0228 6.75008Z" fill="#C6CAD0"/>
+</svg>

assets/icons/share.svg

@@ -0,0 +1,5 @@
+<svg width="16" height="16" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg">
+<path d="M7.99689 2.05652L7.99929 9.98113" stroke="#C6CAD0" stroke-width="1.17299" stroke-linecap="round" stroke-linejoin="round"/>
+<path d="M11.1699 5.22637L8.00001 2.05652L4.83015 5.22637" stroke="#C6CAD0" stroke-width="1.17299" stroke-linecap="round" stroke-linejoin="round"/>
+<path d="M3.24522 8L3.24522 12.2653C3.24522 12.7104 3.37046 13.1372 3.59338 13.4519C3.81631 13.7667 4.11866 13.9435 4.43392 13.9435H11.5661C11.8813 13.9435 12.1837 13.7667 12.4066 13.4519C12.6295 13.1372 12.7548 12.7104 12.7548 12.2653V8" stroke="#C6CAD0" stroke-width="1.17299" stroke-linecap="round" stroke-linejoin="round"/>
+</svg>

assets/icons/text_unwrap.svg

@@ -0,0 +1,6 @@
+<svg width="16" height="16" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg">
+<path d="M11.748 5.74794L14 7.99998L11.748 10.252" stroke="#C6CAD0" stroke-width="1.2" stroke-linecap="round" stroke-linejoin="round"/>
+<path d="M14 7.99997L3 7.99997" stroke="#C6CAD0" stroke-width="1.2" stroke-linecap="round" stroke-linejoin="round"/>
+<path d="M8 3L8 6" stroke="#C6CAD0" stroke-width="1.2" stroke-linecap="round" stroke-linejoin="round"/>
+<path d="M8 10L8 13" stroke="#C6CAD0" stroke-width="1.2" stroke-linecap="round" stroke-linejoin="round"/>
+</svg>

assets/icons/text_wrap.svg

@@ -0,0 +1,5 @@
+<svg width="16" height="16" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg">
+<path d="M5.19924 8.90081L2.9472 6.64876L5.19924 4.39673" stroke="#C6CAD0" stroke-width="1.2" stroke-linecap="round" stroke-linejoin="round"/>
+<path d="M2.9472 6.64877H7.67649C8.00178 6.64877 8.32391 6.71285 8.6245 6.83734C8.92501 6.96184 9.19813 7.14431 9.42817 7.37434C9.6582 7.60437 9.84067 7.87746 9.96512 8.17802C10.0897 8.47856 10.1537 8.8007 10.1537 9.12601C10.1537 9.45131 10.0897 9.77345 9.96512 10.074C9.84067 10.3745 9.6582 10.6477 9.42817 10.8777C9.19813 11.1077 8.92501 11.2902 8.6245 11.4147C8.32391 11.5392 8.00178 11.6033 7.67649 11.6033H6.10005" stroke="#C6CAD0" stroke-width="1.2" stroke-linecap="round" stroke-linejoin="round"/>
+<path d="M13.0528 3.33331V12.6666" stroke="#C6CAD0" stroke-width="1.2" stroke-linecap="round" stroke-linejoin="round"/>
+</svg>

assets/keymaps/default-linux.json

@@ -380,15 +380,7 @@
       "shift-backspace": "agent::ArchiveSelectedThread",
     },
   },
-  {
-    "context": "RulesLibrary",
-    "bindings": {
-      "new": "rules_library::NewRule",
-      "ctrl-n": "rules_library::NewRule",
-      "ctrl-shift-s": "rules_library::ToggleDefaultRule",
-      "ctrl-w": "workspace::CloseWindow",
-    },
-  },
+
   {
     "context": "BufferSearchBar",
     "bindings": {
@@ -729,6 +721,7 @@
     "use_key_equivalents": true,
     "bindings": {
       "space": "menu::Confirm",
+      "shift-r": "agent::RenameSelectedThread",
     },
   },
   {
@@ -979,6 +972,13 @@
       "space": "project_panel::Open",
     },
   },
+  {
+    "context": "GitPanel",
+    "bindings": {
+      "ctrl-1": "git_panel::ActivateChangesTab",
+      "ctrl-2": "git_panel::ActivateHistoryTab",
+    },
+  },
   {
     "context": "GitPanel && ChangesList && !GitBranchSelector",
     "bindings": {
@@ -1551,4 +1551,22 @@
       "shift-tab": "git_graph::FocusPreviousTabStop",
     },
   },
+  {
+    "context": "SkillCreator",
+    "bindings": {
+      "ctrl-w": "workspace::CloseWindow",
+      "ctrl-enter": "skill_creator::SaveSkill",
+      "tab": "skill_creator::FocusNextField",
+      "shift-tab": "skill_creator::FocusPreviousField",
+    },
+  },
+  {
+    "context": "SkillCreator > Editor",
+    "bindings": {
+      "ctrl-w": "workspace::CloseWindow",
+      "ctrl-enter": "skill_creator::SaveSkill",
+      "tab": "skill_creator::FocusNextField",
+      "shift-tab": "skill_creator::FocusPreviousField",
+    },
+  },
 ]

assets/keymaps/default-macos.json

@@ -427,15 +427,6 @@
       "backspace": "agent::ArchiveSelectedThread",
     },
   },
-  {
-    "context": "RulesLibrary",
-    "use_key_equivalents": true,
-    "bindings": {
-      "cmd-n": "rules_library::NewRule",
-      "cmd-shift-s": "rules_library::ToggleDefaultRule",
-      "cmd-w": "workspace::CloseWindow",
-    },
-  },
   {
     "context": "BufferSearchBar",
     "use_key_equivalents": true,
@@ -785,6 +776,7 @@
     "use_key_equivalents": true,
     "bindings": {
       "space": "menu::Confirm",
+      "shift-r": "agent::RenameSelectedThread",
     },
   },
   {
@@ -1040,6 +1032,13 @@
       "alt-enter": "variable_list::AddWatch",
     },
   },
+  {
+    "context": "GitPanel",
+    "bindings": {
+      "cmd-1": "git_panel::ActivateChangesTab",
+      "cmd-2": "git_panel::ActivateHistoryTab",
+    },
+  },
   {
     "context": "GitPanel && ChangesList && !GitBranchSelector",
     "use_key_equivalents": true,
@@ -1644,4 +1643,24 @@
       "shift-tab": "git_graph::FocusPreviousTabStop",
     },
   },
+  {
+    "context": "SkillCreator",
+    "use_key_equivalents": true,
+    "bindings": {
+      "cmd-w": "workspace::CloseWindow",
+      "cmd-enter": "skill_creator::SaveSkill",
+      "tab": "skill_creator::FocusNextField",
+      "shift-tab": "skill_creator::FocusPreviousField",
+    },
+  },
+  {
+    "context": "SkillCreator > Editor",
+    "use_key_equivalents": true,
+    "bindings": {
+      "cmd-w": "workspace::CloseWindow",
+      "cmd-enter": "skill_creator::SaveSkill",
+      "tab": "skill_creator::FocusNextField",
+      "shift-tab": "skill_creator::FocusPreviousField",
+    },
+  },
 ]

assets/keymaps/default-windows.json

@@ -383,15 +383,6 @@
       "shift-backspace": "agent::ArchiveSelectedThread",
     },
   },
-  {
-    "context": "RulesLibrary",
-    "use_key_equivalents": true,
-    "bindings": {
-      "ctrl-n": "rules_library::NewRule",
-      "ctrl-shift-s": "rules_library::ToggleDefaultRule",
-      "ctrl-w": "workspace::CloseWindow",
-    },
-  },
   {
     "context": "BufferSearchBar",
     "use_key_equivalents": true,
@@ -732,6 +723,7 @@
     "use_key_equivalents": true,
     "bindings": {
       "space": "menu::Confirm",
+      "shift-r": "agent::RenameSelectedThread",
     },
   },
   {
@@ -972,6 +964,13 @@
       "space": "project_panel::Open",
     },
   },
+  {
+    "context": "GitPanel",
+    "bindings": {
+      "ctrl-1": "git_panel::ActivateChangesTab",
+      "ctrl-2": "git_panel::ActivateHistoryTab",
+    },
+  },
   {
     "context": "GitPanel && ChangesList && !GitBranchSelector",
     "use_key_equivalents": true,
@@ -1570,4 +1569,24 @@
       "shift-tab": "git_graph::FocusPreviousTabStop",
     },
   },
+  {
+    "context": "SkillCreator",
+    "use_key_equivalents": true,
+    "bindings": {
+      "ctrl-w": "workspace::CloseWindow",
+      "ctrl-enter": "skill_creator::SaveSkill",
+      "tab": "skill_creator::FocusNextField",
+      "shift-tab": "skill_creator::FocusPreviousField",
+    },
+  },
+  {
+    "context": "SkillCreator > Editor",
+    "use_key_equivalents": true,
+    "bindings": {
+      "ctrl-w": "workspace::CloseWindow",
+      "ctrl-enter": "skill_creator::SaveSkill",
+      "tab": "skill_creator::FocusNextField",
+      "shift-tab": "skill_creator::FocusPreviousField",
+    },
+  },
 ]

assets/keymaps/vim.json

@@ -338,7 +338,7 @@
       "ctrl-x": "vim::Decrement",
       "shift-j": "vim::JoinLines",
       "i": "vim::InsertBefore",
-      "a": "vim::InsertAfter",
+      "a": "vim::HelixAppend",
       "o": "vim::InsertLineBelow",
       "shift-o": "vim::InsertLineAbove",
       "p": "vim::Paste",
@@ -494,6 +494,10 @@
       "n": "vim::HelixSelectNext",
       "shift-n": "vim::HelixSelectPrevious",
 
+      // Macros — Helix swaps Vim's q/Q: Q records, q replays
+      "q": "vim::ReplayLastRecording",
+      "shift-q": "vim::ToggleRecord",
+
       // Goto mode
       "g e": "vim::EndOfDocument",
       "g h": "vim::StartOfLine",
@@ -503,6 +507,8 @@
       "g c": "vim::WindowMiddle",
       "g b": "vim::WindowBottom",
       "g r": "editor::FindAllReferences",
+      "g i": "editor::GoToImplementation",
+      "g a": "pane::AlternateFile",
       "g n": "pane::ActivateNextItem",
       "shift-l": "pane::ActivateNextItem", // not a helix default
       "g p": "pane::ActivatePreviousItem",
@@ -943,7 +949,7 @@
       "space w j": "workspace::ActivatePaneDown",
       "space w k": "workspace::ActivatePaneUp",
       "space w l": "workspace::ActivatePaneRight",
-	  "space w q": "pane::CloseActiveItem",
+      "space w q": "pane::CloseActiveItem",
     },
   },
   {
@@ -1056,8 +1062,8 @@
       "ctrl-d": "git_graph::ScrollDown",
       "ctrl-u": "git_graph::ScrollUp",
       "shift-g": "menu::SelectLast",
-      "g g": "menu::SelectFirst"
-    }
+      "g g": "menu::SelectFirst",
+    },
   },
   {
     "context": "GitPanel && ChangesList && !GitBranchSelector",
@@ -1205,4 +1211,18 @@
       "enter": "editor::Newline",
     },
   },
+  {
+    "context": "SkillCreator",
+    "bindings": {
+      "tab": "skill_creator::FocusNextField",
+      "shift-tab": "skill_creator::FocusPreviousField",
+    },
+  },
+  {
+    "context": "SkillCreator > Editor",
+    "bindings": {
+      "tab": "skill_creator::FocusNextField",
+      "shift-tab": "skill_creator::FocusPreviousField",
+    },
+  },
 ]

assets/settings/default.json

@@ -71,6 +71,8 @@
   "agent_ui_font_size": null,
   // The default font size for user messages in the agent panel.
   "agent_buffer_font_size": 12,
+  // The default font size for the commit editor in the git panel and commit modal.
+  "git_commit_buffer_font_size": 12,
   // How much to fade out unused code.
   "unnecessary_code_fade": 0.3,
   // Active pane styling settings.
@@ -1133,6 +1135,7 @@
           "spawn_agent": true,
           "terminal": true,
           "update_plan": true,
+          "update_title": true,
           "search_web": true,
         },
       },
@@ -1153,6 +1156,7 @@
           "skill": true,
           "spawn_agent": true,
           "update_plan": true,
+          "update_title": true,
           "search_web": true,
         },
       },
@@ -1496,6 +1500,10 @@
   // 4. Draw a background behind the color text..
   //      "lsp_document_colors": "background",
   "lsp_document_colors": "inlay",
+  // Whether to query and display LSP `textDocument/documentLink` links in the editor.
+  //
+  // Default: true
+  "lsp_document_links": true,
   // Diagnostics configuration.
   "diagnostics": {
     // Whether to show the project diagnostics button in the status bar.
@@ -1610,6 +1618,8 @@
     // Should the name or path be displayed first in the git view.
     // "path_style": "file_name_first" or "file_path_first"
     "path_style": "file_name_first",
+    // Whether to show the stage and restore buttons on diff hunks.
+    "show_stage_restore_buttons": true,
     // Directory where git worktrees are created, relative to the repository
     // working directory.
     //

crates/acp_thread/Cargo.toml

@@ -13,7 +13,7 @@ path = "src/acp_thread.rs"
 doctest = false
 
 [features]
-test-support = ["gpui/test-support", "project/test-support", "dep:parking_lot", "dep:image"]
+test-support = ["gpui/test-support", "project/test-support", "dep:parking_lot"]
 
 [dependencies]
 action_log.workspace = true
@@ -35,10 +35,10 @@ language_model.workspace = true
 log.workspace = true
 markdown.workspace = true
 parking_lot = { workspace = true, optional = true }
-image = { workspace = true, optional = true }
+image.workspace = true
 portable-pty.workspace = true
 project.workspace = true
-prompt_store.workspace = true
+sandbox.workspace = true
 serde.workspace = true
 serde_json.workspace = true
 settings.workspace = true

crates/acp_thread/src/acp_thread.rs

@@ -16,7 +16,9 @@ use gpui::{
 };
 use itertools::Itertools;
 use language::language_settings::FormatOnSave;
-use language::{Anchor, Buffer, BufferSnapshot, LanguageRegistry, Point, ToPoint, text_diff};
+use language::{
+    Anchor, Buffer, BufferEditSource, BufferSnapshot, LanguageRegistry, Point, ToPoint, text_diff,
+};
 use markdown::{Markdown, MarkdownOptions};
 pub use mention::*;
 use project::lsp_store::{FormatTrigger, LspFormatTarget};
@@ -93,35 +95,6 @@ pub fn subagent_session_info_from_meta(meta: &Option<acp::Meta>) -> Option<Subag
         .and_then(|v| serde_json::from_value(v.clone()).ok())
 }
 
-/// Key used in ACP `AvailableCommand` meta to indicate where a skill
-/// originated from (e.g. `"global"` or a worktree root name). Set by
-/// the native agent so the completion popup can surface skill origin to
-/// disambiguate same-named global vs. project-local skills.
-pub const SKILL_SOURCE_META_KEY: &str = "zed.skill_source";
-
-/// Borrowing accessor for the skill source label stored in ACP meta.
-/// Prefer this over [`skill_source_from_meta`] in hot paths (e.g. per-
-/// command iteration during validation), since it avoids allocating
-/// a `SharedString` for callers that only need to compare against a
-/// `&str`.
-pub fn skill_source_str_from_meta(meta: &Option<acp::Meta>) -> Option<&str> {
-    meta.as_ref()
-        .and_then(|m| m.get(SKILL_SOURCE_META_KEY))
-        .and_then(|v| v.as_str())
-}
-
-/// Helper to extract skill source label from ACP meta as an owned
-/// `SharedString`. Use this when the value needs to outlive the meta
-/// reference; otherwise prefer [`skill_source_str_from_meta`].
-pub fn skill_source_from_meta(meta: &Option<acp::Meta>) -> Option<SharedString> {
-    skill_source_str_from_meta(meta).map(|s| SharedString::from(s.to_owned()))
-}
-
-/// Helper to create meta tagging an `AvailableCommand` with a skill source.
-pub fn meta_with_skill_source(source: &str) -> acp::Meta {
-    acp::Meta::from_iter([(SKILL_SOURCE_META_KEY.into(), source.into())])
-}
-
 #[derive(Debug)]
 pub struct UserMessage {
     pub id: Option<UserMessageId>,
@@ -677,9 +650,16 @@ impl Display for ToolCallStatus {
 #[derive(Debug, PartialEq, Clone)]
 pub enum ContentBlock {
     Empty,
-    Markdown { markdown: Entity<Markdown> },
-    ResourceLink { resource_link: acp::ResourceLink },
-    Image { image: Arc<gpui::Image> },
+    Markdown {
+        markdown: Entity<Markdown>,
+    },
+    ResourceLink {
+        resource_link: acp::ResourceLink,
+    },
+    Image {
+        image: Arc<gpui::Image>,
+        dimensions: Option<gpui::Size<u32>>,
+    },
 }
 
 impl ContentBlock {
@@ -721,8 +701,8 @@ impl ContentBlock {
                 };
             }
             (ContentBlock::Empty, acp::ContentBlock::Image(image_content)) => {
-                if let Some(image) = Self::decode_image(image_content) {
-                    *self = ContentBlock::Image { image };
+                if let Some((image, dimensions)) = Self::decode_image(image_content) {
+                    *self = ContentBlock::Image { image, dimensions };
                 } else {
                     let new_content = Self::image_md(image_content);
                     *self = Self::create_markdown_block(new_content, language_registry, cx);
@@ -750,14 +730,36 @@ impl ContentBlock {
         }
     }
 
-    fn decode_image(image_content: &acp::ImageContent) -> Option<Arc<gpui::Image>> {
+    fn decode_image(
+        image_content: &acp::ImageContent,
+    ) -> Option<(Arc<gpui::Image>, Option<gpui::Size<u32>>)> {
         use base64::Engine as _;
 
         let bytes = base64::engine::general_purpose::STANDARD
             .decode(image_content.data.as_bytes())
             .ok()?;
         let format = gpui::ImageFormat::from_mime_type(&image_content.mime_type)?;
-        Some(Arc::new(gpui::Image::from_bytes(format, bytes)))
+        let dimensions = Self::image_dimensions(&bytes, format);
+        Some((Arc::new(gpui::Image::from_bytes(format, bytes)), dimensions))
+    }
+
+    fn image_dimensions(bytes: &[u8], format: gpui::ImageFormat) -> Option<gpui::Size<u32>> {
+        let format = match format {
+            gpui::ImageFormat::Png => image::ImageFormat::Png,
+            gpui::ImageFormat::Jpeg => image::ImageFormat::Jpeg,
+            gpui::ImageFormat::Webp => image::ImageFormat::WebP,
+            gpui::ImageFormat::Gif => image::ImageFormat::Gif,
+            gpui::ImageFormat::Svg => return None,
+            gpui::ImageFormat::Bmp => image::ImageFormat::Bmp,
+            gpui::ImageFormat::Tiff => image::ImageFormat::Tiff,
+            gpui::ImageFormat::Ico => image::ImageFormat::Ico,
+            gpui::ImageFormat::Pnm => image::ImageFormat::Pnm,
+        };
+
+        image::ImageReader::with_format(std::io::Cursor::new(bytes), format)
+            .into_dimensions()
+            .ok()
+            .map(|(width, height)| gpui::Size { width, height })
     }
 
     fn create_markdown_block(
@@ -773,6 +775,7 @@ impl ContentBlock {
                     None,
                     MarkdownOptions {
                         render_mermaid_diagrams: true,
+                        render_metadata_blocks: true,
                         ..Default::default()
                     },
                     cx,
@@ -837,9 +840,9 @@ impl ContentBlock {
         }
     }
 
-    pub fn image(&self) -> Option<&Arc<gpui::Image>> {
+    pub fn image(&self) -> Option<(&Arc<gpui::Image>, Option<gpui::Size<u32>>)> {
         match self {
-            ContentBlock::Image { image } => Some(image),
+            ContentBlock::Image { image, dimensions } => Some((image, *dimensions)),
             _ => None,
         }
     }
@@ -924,7 +927,7 @@ impl ToolCallContent {
         }
     }
 
-    pub fn image(&self) -> Option<&Arc<gpui::Image>> {
+    pub fn image(&self) -> Option<(&Arc<gpui::Image>, Option<gpui::Size<u32>>)> {
         match self {
             Self::ContentBlock(content) => content.image(),
             _ => None,
@@ -2912,7 +2915,9 @@ impl AcpThread {
                 });
 
                 let format_on_save = buffer.update(cx, |buffer, cx| {
+                    buffer.start_transaction();
                     buffer.edit(edits, None, cx);
+                    buffer.end_transaction_with_source(BufferEditSource::Agent, cx);
 
                     let settings =
                         language::language_settings::LanguageSettings::for_buffer(buffer, cx);
@@ -2955,6 +2960,7 @@ impl AcpThread {
         extra_env: Vec<acp::EnvVariable>,
         cwd: Option<PathBuf>,
         output_byte_limit: Option<u64>,
+        sandbox_wrap: Option<SandboxWrap>,
         cx: &mut Context<Self>,
     ) -> Task<Result<Entity<Terminal>>> {
         let env = match &cwd {
@@ -2995,6 +3001,8 @@ impl AcpThread {
                     ShellBuilder::new(&Shell::Program(shell), is_windows)
                         .redirect_stdin_to_dev_null()
                         .build(Some(command.clone()), &args);
+                let (task_command, task_args, sandbox_config) =
+                    apply_sandbox_wrap(task_command, task_args, sandbox_wrap)?;
                 let terminal = project
                     .update(cx, |project, cx| {
                         project.create_terminal_task(
@@ -3018,6 +3026,7 @@ impl AcpThread {
                         output_byte_limit.map(|l| l as usize),
                         terminal,
                         language_registry,
+                        sandbox_config,
                         cx,
                     )
                 }))
@@ -3097,6 +3106,9 @@ impl AcpThread {
                 output_byte_limit.map(|l| l as usize),
                 terminal,
                 language_registry,
+                // External terminal providers manage their own sandboxing
+                // (if any). We don't wrap their commands.
+                None,
                 cx,
             )
         });

crates/acp_thread/src/connection.rs

@@ -7,14 +7,14 @@ use gpui::{Entity, SharedString, Task};
 use language_model::LanguageModelProviderId;
 use project::{AgentId, Project};
 use serde::{Deserialize, Serialize};
-use std::{any::Any, error::Error, fmt, path::PathBuf, rc::Rc, sync::Arc};
+use std::{any::Any, error::Error, fmt, path::PathBuf, rc::Rc};
 use task::{HideStrategy, SpawnInTerminal, TaskId};
 use ui::{App, IconName};
 use util::path_list::PathList;
 use uuid::Uuid;
 
 #[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize, Hash)]
-pub struct UserMessageId(Arc<str>);
+pub struct UserMessageId(SharedString);
 
 impl UserMessageId {
     pub fn new() -> Self {
@@ -115,6 +115,11 @@ pub trait AgentConnection {
         self.supports_load_session() || self.supports_resume_session()
     }
 
+    /// Whether this agent supports additional session directories.
+    fn supports_session_additional_directories(&self) -> bool {
+        false
+    }
+
     fn auth_methods(&self) -> &[acp::AuthMethod];
 
     fn terminal_auth_task(
@@ -127,6 +132,14 @@ pub trait AgentConnection {
 
     fn authenticate(&self, method: acp::AuthMethodId, cx: &mut App) -> Task<Result<()>>;
 
+    fn supports_logout(&self) -> bool {
+        false
+    }
+
+    fn logout(&self, _cx: &mut App) -> Task<Result<()>> {
+        Task::ready(Err(anyhow::Error::msg("Logout is not supported")))
+    }
+
     fn prompt(
         &self,
         user_message_id: UserMessageId,
@@ -310,7 +323,7 @@ pub trait AgentSessionList {
         cx: &mut App,
     ) -> Task<Result<AgentSessionListResponse>>;
 
-    fn supports_delete(&self) -> bool {
+    fn supports_delete(&self, _cx: &App) -> bool {
         false
     }
 
@@ -694,6 +707,7 @@ mod test_support {
         permission_requests: HashMap<acp::ToolCallId, PermissionOptions>,
         next_prompt_updates: Arc<Mutex<Vec<acp::SessionUpdate>>>,
         supports_load_session: bool,
+        supports_session_additional_directories: bool,
         agent_id: AgentId,
         telemetry_id: SharedString,
     }
@@ -716,6 +730,7 @@ mod test_support {
                 permission_requests: HashMap::default(),
                 sessions: Arc::default(),
                 supports_load_session: false,
+                supports_session_additional_directories: false,
                 agent_id: AgentId::new("stub"),
                 telemetry_id: "stub".into(),
             }
@@ -738,6 +753,14 @@ mod test_support {
             self
         }
 
+        pub fn with_supports_session_additional_directories(
+            mut self,
+            supports_session_additional_directories: bool,
+        ) -> Self {
+            self.supports_session_additional_directories = supports_session_additional_directories;
+            self
+        }
+
         pub fn with_agent_id(mut self, agent_id: AgentId) -> Self {
             self.agent_id = agent_id;
             self
@@ -855,6 +878,10 @@ mod test_support {
             self.supports_load_session
         }
 
+        fn supports_session_additional_directories(&self) -> bool {
+            self.supports_session_additional_directories
+        }
+
         fn load_session(
             self: Rc<Self>,
             session_id: acp::SessionId,

crates/acp_thread/src/mention.rs

@@ -1,7 +1,6 @@
 use agent_client_protocol::schema as acp;
 use anyhow::{Context as _, Result, bail};
 use file_icons::FileIcons;
-use prompt_store::{PromptId, UserPromptId};
 use serde::{Deserialize, Serialize};
 use std::{
     borrow::Cow,
@@ -37,10 +36,6 @@ pub enum MentionUri {
         id: acp::SessionId,
         name: String,
     },
-    Rule {
-        id: PromptId,
-        name: String,
-    },
     Diagnostics {
         #[serde(default = "default_include_errors")]
         include_errors: bool,
@@ -51,6 +46,8 @@ pub enum MentionUri {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         abs_path: Option<PathBuf>,
         line_range: RangeInclusive<u32>,
+        #[serde(default, skip_serializing_if = "Option::is_none")]
+        column: Option<u32>,
     },
     Fetch {
         url: Url,
@@ -64,6 +61,11 @@ pub enum MentionUri {
     MergeConflict {
         file_path: String,
     },
+    Skill {
+        name: String,
+        source: String,
+        skill_file_path: PathBuf,
+    },
 }
 
 impl MentionUri {
@@ -100,6 +102,17 @@ impl MentionUri {
             Ok(start_line..=end_line)
         }
 
+        let parse_column =
+            |input: Option<String>| -> Option<u32> { input?.parse::<u32>().ok()?.checked_sub(1) };
+        let validate_query_params = |url: &Url, allowed: &[&str]| -> Result<()> {
+            for (key, _) in url.query_pairs() {
+                if !allowed.contains(&key.as_ref()) {
+                    bail!("invalid query parameter")
+                }
+            }
+            Ok(())
+        };
+
         let parse_absolute_path = |input: &str| -> Result<Self> {
             let (path_input, fragment) = input
                 .split_once('#')
@@ -109,6 +122,7 @@ impl MentionUri {
                 return Ok(MentionUri::Selection {
                     abs_path: Some(path_input.into()),
                     line_range: fragment,
+                    column: None,
                 });
             }
 
@@ -118,10 +132,12 @@ impl MentionUri {
                 let line = row
                     .checked_sub(1)
                     .context("Line numbers should be 1-based")?;
-                // TODO: Preserve column info too.
                 Ok(MentionUri::Selection {
                     abs_path: Some(abs_path),
                     line_range: line..=line,
+                    column: path_with_position
+                        .column
+                        .map(|column| column.saturating_sub(1)),
                 })
             } else {
                 Ok(MentionUri::File { abs_path })
@@ -151,8 +167,10 @@ impl MentionUri {
                 let path = normalized.as_ref();
 
                 if let Some(fragment) = url.fragment() {
+                    validate_query_params(&url, &["symbol", "column"])?;
                     let line_range = parse_line_range(fragment).log_err().unwrap_or(1..=1);
-                    if let Some(name) = single_query_param(&url, "symbol")? {
+                    let column = parse_column(query_param(&url, "column"));
+                    if let Some(name) = query_param(&url, "symbol") {
                         Ok(Self::Symbol {
                             name,
                             abs_path: path.into(),
@@ -162,6 +180,7 @@ impl MentionUri {
                         Ok(Self::Selection {
                             abs_path: Some(path.into()),
                             line_range,
+                            column,
                         })
                     }
                 } else if input.ends_with("/") {
@@ -181,13 +200,6 @@ impl MentionUri {
                         id: acp::SessionId::new(thread_id),
                         name,
                     })
-                } else if let Some(rule_id) = path.strip_prefix("/agent/rule/") {
-                    let name = single_query_param(&url, "name")?.context("Missing rule name")?;
-                    let rule_id = UserPromptId(rule_id.parse()?);
-                    Ok(Self::Rule {
-                        id: rule_id.into(),
-                        name,
-                    })
                 } else if path == "/agent/diagnostics" {
                     let mut include_errors = default_include_errors();
                     let mut include_warnings = false;
@@ -211,9 +223,11 @@ impl MentionUri {
                         .fragment()
                         .context("Missing fragment for untitled buffer selection")?;
                     let line_range = parse_line_range(fragment)?;
+                    validate_query_params(&url, &["column"])?;
                     Ok(Self::Selection {
                         abs_path: None,
                         line_range,
+                        column: parse_column(query_param(&url, "column")),
                     })
                 } else if let Some(name) = path.strip_prefix("/agent/symbol/") {
                     let fragment = url
@@ -240,13 +254,15 @@ impl MentionUri {
                         abs_path: path.into(),
                     })
                 } else if path.starts_with("/agent/selection") {
+                    validate_query_params(&url, &["path", "column"])?;
                     let fragment = url.fragment().context("Missing fragment for selection")?;
                     let line_range = parse_line_range(fragment)?;
-                    let path =
-                        single_query_param(&url, "path")?.context("Missing path for selection")?;
+                    let column = parse_column(query_param(&url, "column"));
+                    let path = query_param(&url, "path").context("Missing path for selection")?;
                     Ok(Self::Selection {
                         abs_path: Some(path.into()),
                         line_range,
+                        column,
                     })
                 } else if path.starts_with("/agent/terminal-selection") {
                     let line_count = single_query_param(&url, "lines")?
@@ -261,6 +277,40 @@ impl MentionUri {
                 } else if path.starts_with("/agent/merge-conflict") {
                     let file_path = single_query_param(&url, "path")?.unwrap_or_default();
                     Ok(Self::MergeConflict { file_path })
+                } else if path.starts_with("/agent/skill") {
+                    let mut name = None;
+                    let mut source = None;
+                    let mut skill_file_path = None;
+
+                    for (key, value) in url.query_pairs() {
+                        match key.as_ref() {
+                            "name" => {
+                                if name.replace(value.to_string()).is_some() {
+                                    bail!("duplicate skill name query parameter");
+                                }
+                            }
+                            "source" => {
+                                if source.replace(value.to_string()).is_some() {
+                                    bail!("duplicate skill source query parameter");
+                                }
+                            }
+                            "path" => {
+                                if skill_file_path
+                                    .replace(PathBuf::from(value.to_string()))
+                                    .is_some()
+                                {
+                                    bail!("duplicate skill file path query parameter");
+                                }
+                            }
+                            _ => bail!("invalid query parameter"),
+                        }
+                    }
+
+                    Ok(Self::Skill {
+                        name: name.context("missing skill name")?,
+                        source: source.context("missing skill source")?,
+                        skill_file_path: skill_file_path.context("missing skill file path")?,
+                    })
                 } else {
                     bail!("invalid zed url: {:?}", input);
                 }
@@ -280,7 +330,6 @@ impl MentionUri {
             MentionUri::PastedImage { name } => name.clone(),
             MentionUri::Symbol { name, .. } => name.clone(),
             MentionUri::Thread { name, .. } => name.clone(),
-            MentionUri::Rule { name, .. } => name.clone(),
             MentionUri::Diagnostics { .. } => "Diagnostics".to_string(),
             MentionUri::TerminalSelection { line_count } => {
                 if *line_count == 1 {
@@ -303,6 +352,33 @@ impl MentionUri {
                 ..
             } => selection_name(path.as_deref(), line_range),
             MentionUri::Fetch { url } => url.to_string(),
+            MentionUri::Skill { name, .. } => name.clone(),
+        }
+    }
+
+    /// Returns a label for this mention at the given disambiguation `detail`
+    /// level. `detail == 0` is the base name returned by [`Self::name`]; higher
+    /// levels include progressively more context (e.g. additional parent path
+    /// components for files, or the source for skills) until a fixed point is
+    /// reached. Intended to be driven by [`util::disambiguate::compute_disambiguation_details`].
+    pub fn disambiguated_name(&self, detail: usize) -> String {
+        if detail == 0 {
+            return self.name();
+        }
+
+        match self {
+            MentionUri::Skill { name, source, .. } => {
+                if source.is_empty() {
+                    // Must match `SkillSource::display_label()` in agent_skills.
+                    format!("{} (global)", name)
+                } else {
+                    format!("{} ({})", name, source)
+                }
+            }
+            MentionUri::File { abs_path, .. } | MentionUri::Directory { abs_path, .. } => {
+                project::path_suffix(abs_path, detail)
+            }
+            _ => self.name(),
         }
     }
 
@@ -337,6 +413,9 @@ impl MentionUri {
                 )
                 .into(),
             ),
+            MentionUri::Skill {
+                skill_file_path, ..
+            } => Some(skill_file_path.to_string_lossy().into_owned().into()),
             _ => None,
         }
     }
@@ -351,13 +430,13 @@ impl MentionUri {
                 .unwrap_or_else(|| IconName::Folder.path().into()),
             MentionUri::Symbol { .. } => IconName::Code.path().into(),
             MentionUri::Thread { .. } => IconName::Thread.path().into(),
-            MentionUri::Rule { .. } => IconName::Reader.path().into(),
             MentionUri::Diagnostics { .. } => IconName::Warning.path().into(),
             MentionUri::TerminalSelection { .. } => IconName::Terminal.path().into(),
             MentionUri::Selection { .. } => IconName::Reader.path().into(),
             MentionUri::Fetch { .. } => IconName::ToolWeb.path().into(),
             MentionUri::GitDiff { .. } => IconName::GitBranch.path().into(),
             MentionUri::MergeConflict { .. } => IconName::GitMergeConflict.path().into(),
+            MentionUri::Skill { .. } => IconName::Sparkle.path().into(),
         }
     }
 
@@ -390,6 +469,7 @@ impl MentionUri {
                 abs_path,
                 name,
                 line_range,
+                ..
             } => {
                 let mut url = Url::parse("file:///").unwrap();
                 url.set_path(&abs_path.to_string_lossy());
@@ -404,6 +484,7 @@ impl MentionUri {
             MentionUri::Selection {
                 abs_path,
                 line_range,
+                column,
             } => {
                 let mut url = if let Some(path) = abs_path {
                     let mut url = Url::parse("file:///").unwrap();
@@ -414,6 +495,10 @@ impl MentionUri {
                     url.set_path("/agent/untitled-buffer");
                     url
                 };
+                if let Some(column) = column {
+                    url.query_pairs_mut()
+                        .append_pair("column", &(column + 1).to_string());
+                }
                 url.set_fragment(Some(&format!(
                     "L{}:{}",
                     line_range.start() + 1,
@@ -427,12 +512,6 @@ impl MentionUri {
                 url.query_pairs_mut().append_pair("name", name);
                 url
             }
-            MentionUri::Rule { name, id } => {
-                let mut url = Url::parse("zed:///").unwrap();
-                url.set_path(&format!("/agent/rule/{id}"));
-                url.query_pairs_mut().append_pair("name", name);
-                url
-            }
             MentionUri::Diagnostics {
                 include_errors,
                 include_warnings,
@@ -465,6 +544,19 @@ impl MentionUri {
                 url.query_pairs_mut().append_pair("path", file_path);
                 url
             }
+            MentionUri::Skill {
+                name,
+                source,
+                skill_file_path,
+            } => {
+                let mut url = Url::parse("zed:///").unwrap();
+                url.set_path("/agent/skill");
+                url.query_pairs_mut()
+                    .append_pair("name", name)
+                    .append_pair("source", source)
+                    .append_pair("path", &skill_file_path.to_string_lossy());
+                url
+            }
         }
     }
 }
@@ -481,6 +573,11 @@ fn default_include_errors() -> bool {
     true
 }
 
+fn query_param(url: &Url, name: &'static str) -> Option<String> {
+    url.query_pairs()
+        .find_map(|(key, value)| (key == name).then(|| value.to_string()))
+}
+
 fn single_query_param(url: &Url, name: &'static str) -> Result<Option<String>> {
     let pairs = url.query_pairs().collect::<Vec<_>>();
     match pairs.as_slice() {
@@ -615,6 +712,7 @@ mod tests {
                 abs_path: path,
                 name,
                 line_range,
+                ..
             } => {
                 assert_eq!(path, Path::new(path!("/path/to/file.rs")));
                 assert_eq!(name, "MySymbol");
@@ -634,6 +732,7 @@ mod tests {
             MentionUri::Selection {
                 abs_path: path,
                 line_range,
+                ..
             } => {
                 assert_eq!(path.as_ref().unwrap(), Path::new(path!("/path/to/file.rs")));
                 assert_eq!(line_range.start(), &4);
@@ -665,6 +764,7 @@ mod tests {
             MentionUri::Selection {
                 abs_path: None,
                 line_range,
+                ..
             } => {
                 assert_eq!(line_range.start(), &0);
                 assert_eq!(line_range.end(), &9);
@@ -692,17 +792,17 @@ mod tests {
     }
 
     #[test]
-    fn test_parse_rule_uri() {
-        let rule_uri = "zed:///agent/rule/d8694ff2-90d5-4b6f-be33-33c1763acd52?name=Some+rule";
-        let parsed = MentionUri::parse(rule_uri, PathStyle::local()).unwrap();
-        match &parsed {
-            MentionUri::Rule { id, name } => {
-                assert_eq!(id.to_string(), "d8694ff2-90d5-4b6f-be33-33c1763acd52");
-                assert_eq!(name, "Some rule");
-            }
-            _ => panic!("Expected Rule variant"),
-        }
-        assert_eq!(parsed.to_uri().to_string(), rule_uri);
+    fn test_parse_skill_uri_round_trip() {
+        let skill_uri = MentionUri::Skill {
+            name: "rust-best-practices".to_string(),
+            source: "my-personal-project".to_string(),
+            skill_file_path: PathBuf::from(path!("/path/to/skills/rust-best-practices/SKILL.md")),
+        };
+
+        let serialized = skill_uri.to_uri().to_string();
+        let parsed = MentionUri::parse(&serialized, PathStyle::local()).unwrap();
+
+        assert_eq!(parsed, skill_uri);
     }
 
     #[test]
@@ -798,6 +898,7 @@ mod tests {
             MentionUri::Selection {
                 abs_path: path,
                 line_range,
+                ..
             } => {
                 assert_eq!(path.as_ref().unwrap(), Path::new("/path/to/file.rs"));
                 assert_eq!(line_range.start(), &41);
@@ -807,6 +908,29 @@ mod tests {
         }
     }
 
+    #[test]
+    fn test_parse_absolute_file_path_with_row_and_column() {
+        let file_path = "/path/to/file.rs:42:5";
+        let parsed = MentionUri::parse(file_path, PathStyle::Posix).unwrap();
+        match &parsed {
+            MentionUri::Selection {
+                abs_path: path,
+                line_range,
+                column,
+            } => {
+                assert_eq!(path.as_ref().unwrap(), Path::new("/path/to/file.rs"));
+                assert_eq!(line_range.start(), &41);
+                assert_eq!(line_range.end(), &41);
+                assert_eq!(column, &Some(4));
+
+                let parsed_again = MentionUri::parse(parsed.to_uri().as_ref(), PathStyle::Posix)
+                    .expect("selection URI with column should parse");
+                assert_eq!(parsed_again, parsed.clone());
+            }
+            _ => panic!("Expected Selection variant"),
+        }
+    }
+
     #[test]
     fn test_parse_absolute_file_path_with_fragment_line() {
         let file_path = "/path/to/file.rs#L42";
@@ -815,6 +939,7 @@ mod tests {
             MentionUri::Selection {
                 abs_path: path,
                 line_range,
+                ..
             } => {
                 assert_eq!(path.as_ref().unwrap(), Path::new("/path/to/file.rs"));
                 assert_eq!(line_range.start(), &41);
@@ -844,6 +969,7 @@ mod tests {
             MentionUri::Selection {
                 abs_path: path,
                 line_range,
+                ..
             } => {
                 assert_eq!(
                     path.as_ref().unwrap(),
@@ -864,6 +990,7 @@ mod tests {
             MentionUri::Selection {
                 abs_path: path,
                 line_range,
+                ..
             } => {
                 assert_eq!(
                     path.as_ref().unwrap(),
@@ -896,6 +1023,7 @@ mod tests {
             MentionUri::Selection {
                 abs_path: path,
                 line_range,
+                ..
             } => {
                 assert_eq!(path.as_ref().unwrap(), Path::new("/path/to/file.rs"));
                 assert_eq!(line_range.start(), &41);
@@ -913,6 +1041,7 @@ mod tests {
             MentionUri::Selection {
                 abs_path: path,
                 line_range,
+                ..
             } => {
                 assert_eq!(
                     path.as_ref().unwrap(),
@@ -934,6 +1063,7 @@ mod tests {
             MentionUri::Selection {
                 abs_path: path,
                 line_range,
+                ..
             } => {
                 assert_eq!(path.as_ref().unwrap(), Path::new(path!("/path/to/file.rs")));
                 assert_eq!(line_range.start(), &1871);
@@ -951,6 +1081,7 @@ mod tests {
             MentionUri::Selection {
                 abs_path: path,
                 line_range,
+                ..
             } => {
                 assert_eq!(path.as_ref().unwrap(), Path::new(path!("/path/to/file.rs")));
                 assert_eq!(line_range.start(), &9);
@@ -966,6 +1097,7 @@ mod tests {
             MentionUri::Selection {
                 abs_path: path,
                 line_range,
+                ..
             } => {
                 assert_eq!(path.as_ref().unwrap(), Path::new(path!("/path/to/file.rs")));
                 assert_eq!(line_range.start(), &9);
@@ -993,4 +1125,68 @@ mod tests {
         let parsed_single = MentionUri::parse(single_line_uri, PathStyle::local()).unwrap();
         assert_eq!(parsed_single.name(), "Terminal (1 line)");
     }
+
+    #[test]
+    fn test_disambiguated_name() {
+        // Two files with the same name — should disambiguate with parent dir
+        let file_a = MentionUri::File {
+            abs_path: PathBuf::from(path!("/project/src/README.md")),
+        };
+        let file_b = MentionUri::File {
+            abs_path: PathBuf::from(path!("/project/docs/README.md")),
+        };
+        assert_eq!(file_a.name(), "README.md");
+        assert_eq!(file_b.name(), "README.md");
+        assert_eq!(file_a.disambiguated_name(0), "README.md");
+        assert_eq!(file_a.disambiguated_name(1), "src/README.md");
+        assert_eq!(file_b.disambiguated_name(1), "docs/README.md");
+
+        // Files that still collide at one parent should grow further.
+        let deep_a = MentionUri::File {
+            abs_path: PathBuf::from(path!("/a/src/foo.rs")),
+        };
+        let deep_b = MentionUri::File {
+            abs_path: PathBuf::from(path!("/b/src/foo.rs")),
+        };
+        assert_eq!(deep_a.disambiguated_name(1), "src/foo.rs");
+        assert_eq!(deep_b.disambiguated_name(1), "src/foo.rs");
+        assert_eq!(deep_a.disambiguated_name(2), "a/src/foo.rs");
+        assert_eq!(deep_b.disambiguated_name(2), "b/src/foo.rs");
+
+        // Two skills with the same name — should disambiguate with source
+        let global_skill = MentionUri::Skill {
+            name: "create-skill".into(),
+            source: "".into(),
+            skill_file_path: PathBuf::from("/global/create-skill/SKILL.md"),
+        };
+        let project_skill = MentionUri::Skill {
+            name: "create-skill".into(),
+            source: "my-project".into(),
+            skill_file_path: PathBuf::from("/project/create-skill/SKILL.md"),
+        };
+        assert_eq!(global_skill.name(), "create-skill");
+        assert_eq!(global_skill.disambiguated_name(0), "create-skill");
+        assert_eq!(global_skill.disambiguated_name(1), "create-skill (global)");
+        assert_eq!(
+            project_skill.disambiguated_name(1),
+            "create-skill (my-project)"
+        );
+
+        // A type without special disambiguation (Thread) — detail has no effect
+        // (the value is a fixed point so the disambiguation loop terminates).
+        let thread = MentionUri::Thread {
+            id: acp::SessionId::new("123"),
+            name: "My Thread".into(),
+        };
+        assert_eq!(thread.disambiguated_name(0), "My Thread");
+        assert_eq!(thread.disambiguated_name(1), "My Thread");
+        assert_eq!(thread.disambiguated_name(5), "My Thread");
+
+        // Edge case: file at filesystem root has no parent to show
+        let root_file = MentionUri::File {
+            abs_path: PathBuf::from(path!("/README.md")),
+        };
+        assert_eq!(root_file.disambiguated_name(1), "README.md");
+        assert_eq!(root_file.disambiguated_name(5), "README.md");
+    }
 }

crates/acp_thread/src/terminal.rs

@@ -17,6 +17,82 @@ use std::{
 use task::Shell;
 use util::get_default_system_shell_preferring_bash;
 
+/// Request to run a terminal command inside an OS-level sandbox.
+///
+/// Passed to [`super::AcpThread::create_terminal`]. The actual sandboxing
+/// mechanism is platform-specific (today: macOS Seatbelt; nothing on other
+/// platforms — the wrap is silently a no-op there), so callers describe the
+/// *intent* with plain data here rather than constructing platform-specific
+/// types directly.
+///
+/// All-zero defaults are the fully-sandboxed run. Setting `allow_network` /
+/// `allow_fs_write` requests a relaxation; the caller is responsible for
+/// having obtained user approval before reaching this point.
+#[derive(Clone, Debug, Default)]
+pub struct SandboxWrap {
+    /// Directory subtrees the sandbox should allow writes to. Pass the
+    /// project's worktree paths (and any per-command scratch directory)
+    /// here — *not* the command's working directory, which is model-
+    /// controlled and would let the model widen its own writable scope.
+    pub writable_paths: Vec<PathBuf>,
+    /// Allow outbound network access for this command.
+    pub allow_network: bool,
+    /// Allow unrestricted filesystem writes (ignores `writable_paths`).
+    pub allow_fs_write: bool,
+}
+
+/// Opaque RAII handle the sandbox implementation hands back to keep its
+/// per-command resources (e.g. an on-disk Seatbelt config file) alive for
+/// the duration of the spawned command. `Terminal` holds it in a field
+/// whose only job is to drop with the entity.
+pub type SandboxConfigHandle = Box<dyn std::any::Any + Send>;
+
+/// Apply a [`SandboxWrap`] to a `(program, args)` pair, substituting the
+/// platform's sandbox-launcher invocation in place of the original. The
+/// returned `SandboxConfigHandle` (when `Some`) must be kept alive for the
+/// duration of the spawned command — dropping it deletes any on-disk
+/// config the launcher reads at startup.
+///
+/// On non-macOS hosts this is a no-op: the inputs pass through unchanged
+/// and the returned handle is `None`. (We don't yet have a sandbox
+/// integration for other platforms.)
+pub(crate) fn apply_sandbox_wrap(
+    program: String,
+    args: Vec<String>,
+    sandbox_wrap: Option<SandboxWrap>,
+) -> anyhow::Result<(String, Vec<String>, Option<SandboxConfigHandle>)> {
+    let Some(sandbox_wrap) = sandbox_wrap else {
+        return Ok((program, args, None));
+    };
+
+    #[cfg(target_os = "macos")]
+    {
+        let writable: Vec<&std::path::Path> = sandbox_wrap
+            .writable_paths
+            .iter()
+            .map(|p| p.as_path())
+            .collect();
+        let permissions = sandbox::macos_seatbelt::SandboxPermissions {
+            allow_network: sandbox_wrap.allow_network,
+            allow_fs_write: sandbox_wrap.allow_fs_write,
+        };
+        let (new_program, new_args, config_file) =
+            sandbox::macos_seatbelt::wrap_invocation(&program, &args, &writable, permissions)?;
+        Ok((
+            new_program,
+            new_args,
+            Some(Box::new(config_file) as SandboxConfigHandle),
+        ))
+    }
+    #[cfg(not(target_os = "macos"))]
+    {
+        // No sandbox integration available; ignore the wrap request and
+        // let the command run with the agent's ambient permissions.
+        let _ = sandbox_wrap;
+        Ok((program, args, None))
+    }
+}
+
 pub struct Terminal {
     id: acp::TerminalId,
     command: Entity<Markdown>,
@@ -30,6 +106,10 @@ pub struct Terminal {
     /// (e.g., clicking the Stop button). This is set before kill() is called
     /// so that code awaiting wait_for_exit() can check it deterministically.
     user_stopped: Arc<AtomicBool>,
+    /// RAII handle kept alive for the duration of the sandboxed command.
+    /// `None` when the command isn't sandboxed (the common case for
+    /// terminals not created by the agent).
+    _sandbox_config: Option<SandboxConfigHandle>,
 }
 
 pub struct TerminalOutput {
@@ -48,11 +128,13 @@ impl Terminal {
         output_byte_limit: Option<usize>,
         terminal: Entity<terminal::Terminal>,
         language_registry: Arc<LanguageRegistry>,
+        sandbox_config: Option<SandboxConfigHandle>,
         cx: &mut Context<Self>,
     ) -> Self {
         let command_task = terminal.read(cx).wait_for_completed_task(cx);
         Self {
             id,
+            _sandbox_config: sandbox_config,
             command: cx.new(|cx| {
                 Markdown::new(
                     format!("```\n{}\n```", command_label).into(),

crates/acp_tools/src/acp_tools.rs

@@ -508,6 +508,7 @@ impl AcpTools {
                                     } else {
                                         CopyButtonVisibility::Hidden
                                     },
+                                    wrap_button_visibility: markdown::WrapButtonVisibility::Hidden,
                                     border: false,
                                 },
                             ),

crates/action_log/Cargo.toml

@@ -33,12 +33,12 @@ watch.workspace = true
 
 [dev-dependencies]
 buffer_diff = { workspace = true, features = ["test-support"] }
-git.workspace = true
-collections = { workspace = true, features = ["test-support"] }
 clock = { workspace = true, features = ["test-support"] }
+collections = { workspace = true, features = ["test-support"] }
 ctor.workspace = true
+git.workspace = true
 gpui = { workspace = true, features = ["test-support"] }
-
+indoc.workspace = true
 language = { workspace = true, features = ["test-support"] }
 log.workspace = true
 pretty_assertions.workspace = true

crates/action_log/src/action_log.rs

@@ -387,6 +387,11 @@ impl ActionLog {
                 let git_diff_base = git_diff.read(cx).base_text(cx).as_rope().clone();
                 let buffer_text = tracked_buffer.snapshot.as_rope().clone();
                 anyhow::Ok(cx.background_spawn(async move {
+                    if buffer_text.len() == git_diff_base.len()
+                        && buffer_text.chars_at(0).eq(git_diff_base.chars_at(0))
+                    {
+                        return (Arc::<str>::from(git_diff_base.to_string()), git_diff_base);
+                    }
                     let mut old_unreviewed_edits = old_unreviewed_edits.into_iter().peekable();
                     let committed_edits = language::line_diff(
                         &agent_diff_base.to_string(),
@@ -931,7 +936,11 @@ impl ActionLog {
         let mut undo_buffers = Vec::new();
         let mut futures = Vec::new();
 
-        for buffer in self.changed_buffers(cx).into_keys() {
+        for buffer in self
+            .changed_buffers(cx)
+            .map(|(buffer, _)| buffer)
+            .collect::<Vec<_>>()
+        {
             let buffer_ranges = vec![Anchor::min_max_range_for_buffer(
                 buffer.read(cx).remote_id(),
             )];
@@ -1018,17 +1027,19 @@ impl ActionLog {
     }
 
     /// Returns the set of buffers that contain edits that haven't been reviewed by the user.
-    pub fn changed_buffers(&self, cx: &App) -> BTreeMap<Entity<Buffer>, Entity<BufferDiff>> {
+    pub fn changed_buffers(
+        &self,
+        cx: &App,
+    ) -> impl Iterator<Item = (Entity<Buffer>, Entity<BufferDiff>)> {
         self.tracked_buffers
             .iter()
             .filter(|(_, tracked)| tracked.has_edits(cx))
             .map(|(buffer, tracked)| (buffer.clone(), tracked.diff.clone()))
-            .collect()
     }
 
     /// Returns the total number of lines added and removed across all unreviewed buffers.
     pub fn diff_stats(&self, cx: &App) -> DiffStats {
-        DiffStats::all_files(&self.changed_buffers(cx), cx)
+        DiffStats::all_files(self.changed_buffers(cx), cx)
     }
 
     /// Iterate over buffers changed since last read or edited by the model
@@ -1074,7 +1085,7 @@ impl DiffStats {
     }
 
     pub fn all_files(
-        changed_buffers: &BTreeMap<Entity<Buffer>, Entity<BufferDiff>>,
+        changed_buffers: impl IntoIterator<Item = (Entity<Buffer>, Entity<BufferDiff>)>,
         cx: &App,
     ) -> Self {
         let mut total = DiffStats::default();
@@ -1320,6 +1331,7 @@ mod tests {
     use super::*;
     use buffer_diff::DiffHunkStatusKind;
     use gpui::TestAppContext;
+    use indoc::indoc;
     use language::Point;
     use project::{FakeFs, Fs, Project, RemoveOptions};
     use rand::prelude::*;
@@ -1328,7 +1340,7 @@ mod tests {
     use std::env;
     use util::{RandomCharIter, path};
 
-    #[ctor::ctor]
+    #[ctor::ctor(unsafe)]
     fn init_logger() {
         zlog::init_test();
     }
@@ -2703,6 +2715,86 @@ mod tests {
         assert_eq!(unreviewed_hunks(&action_log, cx), vec![]);
     }
 
+    #[gpui::test]
+    async fn test_keep_edits_on_commit_with_shifted_diff_boundaries(cx: &mut TestAppContext) {
+        init_test(cx);
+
+        let initial_text = indoc! {"
+            use crate::{Alpha, Beta};
+
+            fn keep() {
+                work();
+            }
+
+            fn remove() {
+                work();
+            }
+
+            fn after() {
+                work();
+            }
+        "};
+        let fs = FakeFs::new(cx.executor());
+        fs.insert_tree(
+            path!("/project"),
+            json!({
+                ".git": {},
+                "file.rs": initial_text,
+            }),
+        )
+        .await;
+        fs.set_head_for_repo(
+            path!("/project/.git").as_ref(),
+            &[("file.rs", initial_text.into())],
+            "0000000",
+        );
+        cx.run_until_parked();
+
+        let project = Project::test(fs.clone(), [path!("/project").as_ref()], cx).await;
+        let action_log = cx.new(|_| ActionLog::new(project.clone()));
+
+        let file_path = project
+            .read_with(cx, |project, cx| {
+                project.find_project_path(path!("/project/file.rs"), cx)
+            })
+            .unwrap();
+        let buffer = project
+            .update(cx, |project, cx| project.open_buffer(file_path, cx))
+            .await
+            .unwrap();
+
+        let final_text = indoc! {"
+            use crate::{Alpha};
+
+            fn keep() {
+                work();
+            }
+
+            fn after() {
+                work();
+            }
+        "};
+
+        cx.update(|cx| {
+            action_log.update(cx, |log, cx| log.buffer_read(buffer.clone(), cx));
+            buffer.update(cx, |buffer, cx| {
+                buffer.set_text(final_text, cx);
+            });
+            action_log.update(cx, |log, cx| log.buffer_edited(buffer.clone(), cx));
+        });
+        cx.run_until_parked();
+        assert!(!unreviewed_hunks(&action_log, cx).is_empty());
+
+        fs.set_head_for_repo(
+            path!("/project/.git").as_ref(),
+            &[("file.rs", final_text.into())],
+            "0000001",
+        );
+        cx.run_until_parked();
+
+        assert_eq!(unreviewed_hunks(&action_log, cx), vec![]);
+    }
+
     /// Regression test: when head_commit updates before the BufferDiff's base
     /// text does, an intermediate DiffChanged (e.g. from a buffer-edit diff
     /// recalculation) must NOT consume the commit signal.  The subscription
@@ -3168,21 +3260,21 @@ mod tests {
             child_log_1
                 .read(cx)
                 .changed_buffers(cx)
-                .into_keys()
+                .map(|(buffer, _)| buffer)
                 .collect()
         });
         let child_2_changed: Vec<_> = cx.read(|cx| {
             child_log_2
                 .read(cx)
                 .changed_buffers(cx)
-                .into_keys()
+                .map(|(buffer, _)| buffer)
                 .collect()
         });
         let parent_changed: Vec<_> = cx.read(|cx| {
             parent_log
                 .read(cx)
                 .changed_buffers(cx)
-                .into_keys()
+                .map(|(buffer, _)| buffer)
                 .collect()
         });
 
@@ -3408,7 +3500,6 @@ mod tests {
             action_log
                 .read(cx)
                 .changed_buffers(cx)
-                .into_iter()
                 .map(|(buffer, diff)| {
                     let snapshot = buffer.read(cx).snapshot();
                     (

crates/activity_indicator/src/activity_indicator.rs

@@ -377,7 +377,7 @@ impl ActivityIndicator {
                 return Some(Content {
                     icon: ActivityIcon::LoadingSpinner,
                     message,
-                    on_click: Some(Arc::new(Self::toggle_language_server_work_context_menu)),
+                    on_click: None,
                     tooltip_message: None,
                 });
             }
@@ -639,14 +639,6 @@ impl ActivityIndicator {
 
         None
     }
-
-    fn toggle_language_server_work_context_menu(
-        &mut self,
-        window: &mut Window,
-        cx: &mut Context<Self>,
-    ) {
-        self.context_menu_handle.toggle(window, cx);
-    }
 }
 
 impl EventEmitter<Event> for ActivityIndicator {}
@@ -659,15 +651,16 @@ impl Render for ActivityIndicator {
             .id("activity-indicator")
             .on_action(cx.listener(Self::show_error_message))
             .on_action(cx.listener(Self::dismiss_message));
+
         let Some(content) = self.content_to_render(cx) else {
             return result;
         };
+
         let activity_indicator = cx.entity().downgrade();
         let truncate_content = content.message.len() > MAX_MESSAGE_LEN;
-
         let has_click_handler = content.on_click.is_some();
 
-        result.gap_2().child(
+        result.child(
             PopoverMenu::new("activity-indicator-popover")
                 .trigger(
                     Button::new("activity-indicator-trigger", {
@@ -705,10 +698,9 @@ impl Render for ActivityIndicator {
                 .when(!has_click_handler, |this| {
                     this.menu(move |window, cx| {
                         let strong_this = activity_indicator.upgrade()?;
-                        let mut has_work = false;
+                        let mut has_cancellable_work = false;
                         let menu = ContextMenu::build(window, cx, |mut menu, _, cx| {
                             for work in strong_this.read(cx).pending_language_server_work(cx) {
-                                has_work = true;
                                 let activity_indicator = activity_indicator.clone();
                                 let mut title = work
                                     .progress
@@ -717,16 +709,21 @@ impl Render for ActivityIndicator {
                                     .unwrap_or(work.progress_token.to_string());
 
                                 if work.progress.is_cancellable {
+                                    has_cancellable_work = true;
                                     let language_server_id = work.language_server_id;
                                     let token = work.progress_token.clone();
-                                    let title = SharedString::from(title);
+                                    let title = SharedString::from(format!("Cancel {title}"));
                                     menu = menu.custom_entry(
                                         move |_, _| {
                                             h_flex()
                                                 .w_full()
-                                                .justify_between()
+                                                .gap_1()
+                                                .child(
+                                                    Icon::new(IconName::Close)
+                                                        .color(Color::Muted)
+                                                        .size(IconSize::Small),
+                                                )
                                                 .child(Label::new(title.clone()))
-                                                .child(Icon::new(IconName::XCircle))
                                                 .into_any_element()
                                         },
                                         move |_, cx| {
@@ -760,7 +757,7 @@ impl Render for ActivityIndicator {
                             }
                             menu
                         });
-                        has_work.then_some(menu)
+                        has_cancellable_work.then_some(menu)
                     })
                 }),
         )

crates/agent/Cargo.toml

@@ -65,6 +65,7 @@ streaming_diff.workspace = true
 strsim.workspace = true
 task.workspace = true
 telemetry.workspace = true
+tempfile.workspace = true
 text.workspace = true
 thiserror.workspace = true
 ui.workspace = true
@@ -77,11 +78,13 @@ zed_env_vars.workspace = true
 zstd.workspace = true
 
 [dev-dependencies]
+assets.workspace = true
 async-io.workspace = true
 agent_servers = { workspace = true, "features" = ["test-support"] }
 client = { workspace = true, "features" = ["test-support"] }
 clock = { workspace = true, "features" = ["test-support"] }
 context_server = { workspace = true, "features" = ["test-support"] }
+criterion.workspace = true
 ctor.workspace = true
 db = { workspace = true, "features" = ["test-support"] }
 editor = { workspace = true, "features" = ["test-support"] }
@@ -99,10 +102,15 @@ project = { workspace = true, "features" = ["test-support"] }
 rand.workspace = true
 reqwest_client.workspace = true
 settings = { workspace = true, "features" = ["test-support"] }
-tempfile.workspace = true
 
 theme = { workspace = true, "features" = ["test-support"] }
+theme_settings.workspace = true
 
 unindent = { workspace = true }
 
 zlog.workspace = true
+
+[[bench]]
+name = "edit_file_tool"
+harness = false
+required-features = ["test-support"]

crates/agent/benches/edit_file_tool.rs

@@ -0,0 +1,743 @@
+use std::{
+    any::Any,
+    future::Future,
+    path::Path,
+    sync::Arc,
+    task::{Context, Poll},
+};
+
+use action_log::ActionLog;
+use agent::{
+    AgentTool, ContextServerRegistry, EditFileTool, EditFileToolInput, EditFileToolOutput,
+    Templates, Thread, ToolCallEventStream, ToolInput,
+};
+use agent_settings::{AgentSettings, ToolRules};
+use criterion::{
+    BatchSize, BenchmarkId, Criterion, Throughput, black_box, criterion_group, criterion_main,
+};
+use editor::{Editor, EditorStyle};
+use futures::{StreamExt as _, pin_mut, task::noop_waker};
+use gpui::{
+    AnyWindowHandle, AppContext as _, BackgroundExecutor, Entity, Focusable as _, TestAppContext,
+    UpdateGlobal as _,
+};
+use language::{FakeLspAdapter, rust_lang};
+use language_model::fake_provider::FakeLanguageModel;
+use project::{FakeFs, Project};
+use prompt_store::ProjectContext;
+use rand::{Rng as _, SeedableRng as _, rngs::StdRng};
+use serde_json::{Value, json};
+use settings::{Settings as _, SettingsStore};
+use ui::IntoElement as _;
+
+const SEED: u64 = 0x5EED_5EED;
+const OLD_TEXT_CHUNK_SIZE: usize = 512;
+const NEW_TEXT_CHUNK_SIZE: usize = 512;
+
+const FILE_PROJECT_PATH: &str = "root/src/workspace_snapshot.rs";
+const FILE_ABS_PATH: &str = "/root/src/workspace_snapshot.rs";
+
+#[derive(Clone)]
+struct EditOp {
+    old_text: String,
+    new_text: String,
+}
+
+#[derive(Clone)]
+struct EditFixture {
+    name: &'static str,
+    old_file_text: String,
+    expected_file_text: String,
+    edits: Vec<EditOp>,
+}
+
+struct BenchmarkHarness {
+    cx: Option<TestAppContext>,
+    edit_tool: Option<Arc<EditFileTool>>,
+    thread: Option<Entity<Thread>>,
+    partial_payloads: Vec<Value>,
+    final_payload: Value,
+    expected_file_text: String,
+    editor: Option<Entity<Editor>>,
+    window: Option<AnyWindowHandle>,
+    // Keeps the LSP buffer-registration handle and the fake language server alive
+    // for the lifetime of the benchmark so `didChange`/diagnostics keep flowing
+    // while edits are applied.
+    keep_alive: Vec<Box<dyn Any>>,
+}
+
+impl Drop for BenchmarkHarness {
+    fn drop(&mut self) {
+        // Release our handles to the entities first.
+        self.edit_tool.take();
+        self.thread.take();
+        self.editor.take();
+        self.keep_alive.clear();
+
+        if let Some(mut cx) = self.cx.take() {
+            // Close the editor window so the editor entity and the buffer handles
+            // it holds are released, then pump the executor so cancelled editor /
+            // action-log background tasks drop their captured handles before the
+            // leak detector runs on `TestAppContext` drop.
+            if let Some(window) = self.window.take() {
+                cx.update_window(window, |_, window, _| window.remove_window())
+                    .ok();
+            }
+            cx.update(|_| {});
+            cx.executor().run_until_parked();
+            cx.quit();
+        }
+    }
+}
+
+fn edit_file_tool_streaming(c: &mut Criterion) {
+    let fixtures = fixtures();
+    let mut group = c.benchmark_group("edit_file_tool_streaming");
+    group.sample_size(10);
+
+    for fixture in fixtures {
+        let new_bytes: usize = fixture.edits.iter().map(|edit| edit.new_text.len()).sum();
+        group.throughput(Throughput::Bytes(new_bytes as u64));
+        group.bench_with_input(
+            BenchmarkId::new(fixture.name, fixture.old_file_text.len()),
+            &fixture,
+            |bench, fixture| {
+                bench.iter_batched(
+                    || setup_harness(fixture.clone()),
+                    |mut harness| {
+                        let output = run_streamed_edit(&mut harness);
+                        let EditFileToolOutput::Success { new_text, .. } = &output else {
+                            panic!("expected edit_file tool to succeed");
+                        };
+                        assert_eq!(new_text, &harness.expected_file_text);
+                        // Return the harness as part of the output so its teardown (which has
+                        // to pump the executor to release `Entity<Buffer>` handles captured by
+                        // background tasks) runs in criterion's drop phase after the timer has
+                        // stopped, rather than inside the timed region.
+                        (black_box(output), harness)
+                    },
+                    BatchSize::SmallInput,
+                );
+            },
+        );
+    }
+
+    group.finish();
+}
+
+fn setup_harness(fixture: EditFixture) -> BenchmarkHarness {
+    let mut cx = init_context();
+    let executor = cx.executor();
+    let parts = block_on_executor(
+        &executor,
+        setup_editor_and_tool(&mut cx, fixture.old_file_text.clone()),
+    );
+    // Let the LSP handshake, initial parse, and first layout settle before timing.
+    cx.executor().run_until_parked();
+
+    let partial_payloads = streamed_partial_payloads(&fixture.edits);
+    let final_payload = json!({
+        "path": FILE_PROJECT_PATH,
+        "edits": fixture
+            .edits
+            .iter()
+            .map(|edit| json!({ "old_text": edit.old_text, "new_text": edit.new_text }))
+            .collect::<Vec<_>>(),
+    });
+
+    BenchmarkHarness {
+        cx: Some(cx),
+        edit_tool: Some(parts.edit_tool),
+        thread: Some(parts.thread),
+        partial_payloads,
+        final_payload,
+        expected_file_text: fixture.expected_file_text,
+        editor: Some(parts.editor),
+        window: Some(parts.window),
+        keep_alive: parts.keep_alive,
+    }
+}
+
+struct HarnessParts {
+    edit_tool: Arc<EditFileTool>,
+    thread: Entity<Thread>,
+    editor: Entity<Editor>,
+    window: AnyWindowHandle,
+    keep_alive: Vec<Box<dyn Any>>,
+}
+
+/// Builds a project + edit tool, opens the target buffer in an editor view inside
+/// a window, and attaches a fake Rust language server. This mirrors the real app:
+/// the edited file is open in a pane with a language server, so each buffer edit
+/// drives the editor's observer cascade (matching brackets, code actions, outline,
+/// bracket colorization), a tree-sitter reparse, and an LSP `didChange` +
+/// diagnostics round-trip — the costs that dominate a real agent edit.
+async fn setup_editor_and_tool(cx: &mut TestAppContext, file_text: String) -> HarnessParts {
+    let fs = FakeFs::new(cx.executor());
+    fs.insert_tree(
+        "/root",
+        json!({
+            "src": {
+                "workspace_snapshot.rs": file_text,
+            },
+        }),
+    )
+    .await;
+
+    let project = Project::test(fs, [Path::new("/root")], cx).await;
+    let language_registry = project.read_with(cx, |project, _cx| project.languages().clone());
+    language_registry.add(rust_lang());
+    let mut fake_servers = language_registry.register_fake_lsp(
+        "Rust",
+        FakeLspAdapter {
+            capabilities: lsp::ServerCapabilities {
+                text_document_sync: Some(lsp::TextDocumentSyncCapability::Kind(
+                    lsp::TextDocumentSyncKind::INCREMENTAL,
+                )),
+                ..Default::default()
+            },
+            ..Default::default()
+        },
+    );
+
+    let context_server_registry =
+        cx.new(|cx| ContextServerRegistry::new(project.read(cx).context_server_store(), cx));
+    let model = Arc::new(FakeLanguageModel::default());
+    let thread = cx.new(|cx| {
+        Thread::new(
+            project.clone(),
+            cx.new(|_cx| ProjectContext::default()),
+            context_server_registry,
+            Templates::new(),
+            Some(model),
+            cx,
+        )
+    });
+    let action_log: Entity<ActionLog> =
+        thread.read_with(cx, |thread, _cx| thread.action_log().clone());
+    let edit_tool = Arc::new(EditFileTool::new(
+        project.clone(),
+        thread.downgrade(),
+        action_log,
+        language_registry,
+    ));
+
+    // Open the same buffer the tool will edit and register it with the language
+    // servers so edits produce `didChange` notifications.
+    let buffer = project
+        .update(cx, |project, cx| {
+            project.open_local_buffer(FILE_ABS_PATH, cx)
+        })
+        .await
+        .expect("failed to open buffer");
+    let lsp_handle = project.update(cx, |project, cx| {
+        project.register_buffer_with_language_servers(&buffer, cx)
+    });
+
+    let fake_server = fake_servers
+        .next()
+        .await
+        .expect("fake language server should start");
+    // Publish diagnostics on every edit, mirroring a real server reacting to
+    // `didChange`, so the editor's diagnostics path runs per edit.
+    let server = fake_server.clone();
+    fake_server.handle_notification::<lsp::notification::DidChangeTextDocument, _>(
+        move |params, _cx| {
+            server.notify::<lsp::notification::PublishDiagnostics>(lsp::PublishDiagnosticsParams {
+                uri: params.text_document.uri.clone(),
+                version: Some(params.text_document.version),
+                diagnostics: vec![lsp::Diagnostic {
+                    range: lsp::Range::new(lsp::Position::new(0, 0), lsp::Position::new(0, 1)),
+                    severity: Some(lsp::DiagnosticSeverity::WARNING),
+                    message: "bench diagnostic".to_string(),
+                    ..Default::default()
+                }],
+            });
+        },
+    );
+
+    // Attach an editor view in a window and lay it out once so the viewport-gated
+    // observers (bracket colorization, selection highlights) have a visible range.
+    let window = cx.add_window(|window, cx| {
+        let mut editor = Editor::for_buffer(buffer.clone(), Some(project.clone()), window, cx);
+        editor.set_style(EditorStyle::default(), window, cx);
+        window.focus(&editor.focus_handle(cx), cx);
+        editor
+    });
+    let editor = window.root(cx).expect("window should have an editor root");
+    let window: AnyWindowHandle = window.into();
+    // Lay out and paint a real frame so the editor establishes a viewport (this
+    // is what makes the viewport-gated observers like bracket colorization run).
+    {
+        let mut visual_cx = gpui::VisualTestContext::from_window(window, &*cx);
+        visual_cx.draw(
+            gpui::point(gpui::px(0.0), gpui::px(0.0)),
+            gpui::size(gpui::px(1024.0), gpui::px(768.0)),
+            |_, _| editor.clone().into_any_element(),
+        );
+    }
+
+    let keep_alive: Vec<Box<dyn Any>> = vec![
+        Box::new(lsp_handle),
+        Box::new(fake_server),
+        Box::new(fake_servers),
+        Box::new(buffer),
+    ];
+
+    HarnessParts {
+        edit_tool,
+        thread,
+        editor,
+        window,
+        keep_alive,
+    }
+}
+
+fn init_context() -> TestAppContext {
+    let cx = TestAppContext::single();
+    cx.update(|cx| {
+        let settings_store = SettingsStore::test(cx);
+        cx.set_global(settings_store);
+        assets::Assets.load_test_fonts(cx);
+        theme_settings::init(theme::LoadThemes::JustBase, cx);
+        editor::init(cx);
+        SettingsStore::update_global(cx, |store: &mut SettingsStore, cx| {
+            store.update_user_settings(cx, |settings| {
+                settings
+                    .project
+                    .all_languages
+                    .defaults
+                    .ensure_final_newline_on_save = Some(false);
+                settings.project.all_languages.defaults.colorize_brackets = Some(true);
+            });
+        });
+
+        let mut agent_settings = AgentSettings::get_global(cx).clone();
+        agent_settings.tool_permissions.tools.insert(
+            EditFileTool::NAME.into(),
+            ToolRules {
+                default: Some(settings::ToolPermissionMode::Allow),
+                always_allow: vec![],
+                always_deny: vec![],
+                always_confirm: vec![],
+                invalid_patterns: vec![],
+            },
+        );
+        AgentSettings::override_global(agent_settings, cx);
+    });
+    cx
+}
+
+fn run_streamed_edit(harness: &mut BenchmarkHarness) -> EditFileToolOutput {
+    let (mut sender, input): (_, ToolInput<EditFileToolInput>) = ToolInput::test();
+    for payload in &harness.partial_payloads {
+        sender.send_partial(payload.clone());
+    }
+    sender.send_full(harness.final_payload.clone());
+
+    let (event_stream, _event_rx) = ToolCallEventStream::test();
+    let cx = harness
+        .cx
+        .as_ref()
+        .expect("benchmark harness should have a cx");
+    let task = cx.update(|cx| {
+        harness
+            .edit_tool
+            .as_ref()
+            .expect("benchmark harness should have an edit tool")
+            .clone()
+            .run(input, event_stream, cx)
+    });
+
+    let executor = harness
+        .cx
+        .as_ref()
+        .expect("benchmark harness should have a cx")
+        .executor();
+    block_on_executor(&executor, task).unwrap()
+}
+
+fn block_on_executor<R>(executor: &BackgroundExecutor, future: impl Future<Output = R>) -> R {
+    pin_mut!(future);
+    let waker = noop_waker();
+    let mut task_context = Context::from_waker(&waker);
+
+    for _ in 0..10_000 {
+        if let Poll::Ready(output) = future.as_mut().poll(&mut task_context) {
+            return output;
+        }
+        executor.run_until_parked();
+    }
+
+    panic!("future did not complete while running edit_file_tool benchmark");
+}
+
+/// Builds the streamed partial payloads for a (possibly multi-edit) session,
+/// mirroring how the agent reveals one edit at a time: earlier edits stay
+/// complete in the array while the current edit streams its `old_text` then its
+/// `new_text` in chunks.
+fn streamed_partial_payloads(edits: &[EditOp]) -> Vec<Value> {
+    let path = FILE_PROJECT_PATH;
+    let mut payloads = vec![json!({ "path": path }), json!({ "path": path })];
+
+    for index in 0..edits.len() {
+        let completed: Vec<Value> = edits[..index]
+            .iter()
+            .map(|edit| json!({ "old_text": edit.old_text, "new_text": edit.new_text }))
+            .collect();
+        let edit = &edits[index];
+
+        for old_end in chunk_ends(&edit.old_text, OLD_TEXT_CHUNK_SIZE) {
+            let mut arr = completed.clone();
+            arr.push(json!({ "old_text": &edit.old_text[..old_end] }));
+            payloads.push(json!({ "path": path, "edits": arr }));
+        }
+
+        let mut arr = completed.clone();
+        arr.push(json!({ "old_text": edit.old_text, "new_text": "" }));
+        payloads.push(json!({ "path": path, "edits": arr }));
+
+        for new_end in chunk_ends(&edit.new_text, NEW_TEXT_CHUNK_SIZE) {
+            let mut arr = completed.clone();
+            arr.push(json!({ "old_text": edit.old_text, "new_text": &edit.new_text[..new_end] }));
+            payloads.push(json!({ "path": path, "edits": arr }));
+        }
+    }
+
+    payloads
+}
+
+fn chunk_ends(text: &str, chunk_size: usize) -> impl Iterator<Item = usize> + '_ {
+    let mut end = 0;
+    std::iter::from_fn(move || {
+        if end == text.len() {
+            return None;
+        }
+
+        end = (end + chunk_size).min(text.len());
+        while !text.is_char_boundary(end) {
+            end -= 1;
+        }
+        Some(end)
+    })
+}
+
+fn fixtures() -> Vec<EditFixture> {
+    vec![
+        make_fixture(
+            "tiny_function_rewrite",
+            2,
+            EditPattern::LocalizedRewrite {
+                start_line: 12,
+                line_count: 6,
+            },
+            SEED,
+        ),
+        make_fixture(
+            "small_function_rewrite",
+            5,
+            EditPattern::LocalizedRewrite {
+                start_line: 22,
+                line_count: 12,
+            },
+            SEED + 1,
+        ),
+        make_fixture(
+            "medium_many_small_changes",
+            8,
+            EditPattern::ManySmallChanges { every_nth_line: 7 },
+            SEED + 2,
+        ),
+        make_fixture(
+            "medium_insertions",
+            8,
+            EditPattern::InsertHelperBlocks { every_nth_line: 9 },
+            SEED + 3,
+        ),
+        make_large_multi_edit_fixture("large_multi_edit", 80, 16, SEED + 4),
+    ]
+}
+
+enum EditPattern {
+    LocalizedRewrite {
+        start_line: usize,
+        line_count: usize,
+    },
+    ManySmallChanges {
+        every_nth_line: usize,
+    },
+    InsertHelperBlocks {
+        every_nth_line: usize,
+    },
+}
+
+fn make_fixture(
+    name: &'static str,
+    function_count: usize,
+    pattern: EditPattern,
+    seed: u64,
+) -> EditFixture {
+    let mut rng = StdRng::seed_from_u64(seed);
+    let old_lines = random_rust_module(&mut rng, function_count);
+    let edit_range = edit_range(&old_lines, &pattern);
+    let old_text = old_lines[edit_range.clone()].join("\n");
+    let mut new_lines = old_lines.clone();
+
+    match pattern {
+        EditPattern::LocalizedRewrite { .. } => {
+            rewrite_local_block(&mut new_lines[edit_range.clone()], &mut rng)
+        }
+        EditPattern::ManySmallChanges { every_nth_line } => {
+            rewrite_many_small_lines(&mut new_lines[edit_range.clone()], every_nth_line, &mut rng)
+        }
+        EditPattern::InsertHelperBlocks { every_nth_line } => {
+            insert_helper_blocks(&mut new_lines, edit_range.clone(), every_nth_line, &mut rng)
+        }
+    }
+
+    let new_text_end = edit_range.end + new_lines.len().saturating_sub(old_lines.len());
+    let old_file_text = old_lines.join("\n");
+    let expected_file_text = new_lines.join("\n");
+    let new_text = new_lines[edit_range.start..new_text_end].join("\n");
+
+    EditFixture {
+        name,
+        old_file_text,
+        expected_file_text,
+        edits: vec![EditOp { old_text, new_text }],
+    }
+}
+
+fn make_large_multi_edit_fixture(
+    name: &'static str,
+    function_count: usize,
+    edit_count: usize,
+    seed: u64,
+) -> EditFixture {
+    const HEADER_LINES: usize = 10;
+    const FUNCTION_LINES: usize = 12;
+    const FUNCTION_BODY_LINES: usize = 11;
+
+    let mut rng = StdRng::seed_from_u64(seed);
+    let old_lines = random_rust_module(&mut rng, function_count);
+    let old_file_text = old_lines.join("\n");
+
+    let step = (function_count / edit_count).max(1);
+    let mut picks: Vec<usize> = (0..edit_count)
+        .map(|k| (k * step).min(function_count - 1))
+        .collect();
+    picks.dedup();
+
+    let replacements: Vec<(usize, Vec<String>)> = picks
+        .iter()
+        .map(|&function_index| {
+            (
+                function_index,
+                large_function_lines(&mut rng, function_index),
+            )
+        })
+        .collect();
+
+    let edits = replacements
+        .iter()
+        .map(|(function_index, new_function)| {
+            let start = HEADER_LINES + function_index * FUNCTION_LINES;
+            let end = start + FUNCTION_BODY_LINES;
+            EditOp {
+                old_text: old_lines[start..end].join("\n"),
+                new_text: new_function.join("\n"),
+            }
+        })
+        .collect();
+
+    let mut new_lines = old_lines;
+    for (function_index, new_function) in replacements.iter().rev() {
+        let start = HEADER_LINES + function_index * FUNCTION_LINES;
+        let end = start + FUNCTION_BODY_LINES;
+        new_lines.splice(start..end, new_function.iter().cloned());
+    }
+    let expected_file_text = new_lines.join("\n");
+
+    EditFixture {
+        name,
+        old_file_text,
+        expected_file_text,
+        edits,
+    }
+}
+
+fn large_function_lines(rng: &mut StdRng, index: usize) -> Vec<String> {
+    let function_name = identifier(rng, index + 40_000);
+    let argument_name = identifier(rng, index + 41_000);
+
+    let mut lines = vec![
+        format!(
+            "    pub fn {function_name}(&mut self, {argument_name}: usize) -> Result<usize> {{"
+        ),
+        format!("        let mut accumulator = {argument_name};"),
+    ];
+
+    let body_lines = rng.random_range(30..42);
+    for body_index in 0..body_lines {
+        let local_name = identifier(rng, index + 50_000 + body_index);
+        let multiplier = rng.random_range(2..19);
+        let offset = rng.random_range(1..256);
+        match body_index % 4 {
+            0 => lines.push(format!(
+                "        let {local_name} = accumulator.saturating_mul({multiplier}).saturating_add({offset});"
+            )),
+            1 => lines.push(format!(
+                "        accumulator = {local_name}.saturating_sub(self.version % {offset}.max(1));"
+            )),
+            2 => lines.push(format!(
+                "        if {local_name} % {multiplier} == 0 {{ accumulator = accumulator.saturating_add({local_name}); }}"
+            )),
+            _ => lines.push(format!(
+                "        self.buffers.insert(\"{local_name}\".to_string(), accumulator);"
+            )),
+        }
+    }
+
+    lines.push("        self.version = self.version.saturating_add(accumulator);".to_string());
+    lines.push("        Ok(accumulator)".to_string());
+    lines.push("    }".to_string());
+    lines
+}
+
+fn edit_range(lines: &[String], pattern: &EditPattern) -> std::ops::Range<usize> {
+    let mut range = match pattern {
+        EditPattern::LocalizedRewrite {
+            start_line,
+            line_count,
+        } => *start_line..(*start_line + *line_count).min(lines.len()),
+        EditPattern::ManySmallChanges { .. } | EditPattern::InsertHelperBlocks { .. } => {
+            10..lines.len().saturating_sub(5)
+        }
+    };
+
+    while range.end > range.start && lines[range.end - 1].is_empty() {
+        range.end -= 1;
+    }
+
+    range
+}
+
+fn random_rust_module(rng: &mut StdRng, function_count: usize) -> Vec<String> {
+    let mut lines = vec![
+        "use anyhow::{Context as _, Result};".to_string(),
+        "use collections::HashMap;".to_string(),
+        "".to_string(),
+        "#[derive(Clone, Debug)]".to_string(),
+        "pub struct WorkspaceSnapshot {".to_string(),
+        "    buffers: HashMap<String, usize>,".to_string(),
+        "    version: usize,".to_string(),
+        "}".to_string(),
+        "".to_string(),
+        "impl WorkspaceSnapshot {".to_string(),
+    ];
+
+    for function_index in 0..function_count {
+        let function_name = identifier(rng, function_index);
+        let argument_name = identifier(rng, function_index + 1_000);
+        let local_name = identifier(rng, function_index + 2_000);
+        let branch_name = identifier(rng, function_index + 3_000);
+        let multiplier = rng.random_range(2..17);
+        let offset = rng.random_range(1..128);
+
+        lines.extend([
+            format!(
+                "    pub fn {function_name}(&mut self, {argument_name}: usize) -> Result<usize> {{"
+            ),
+            format!("        let mut {local_name} = {argument_name}.saturating_mul({multiplier});"),
+            format!("        if {local_name} % 2 == 0 {{"),
+            format!(
+                "            {local_name} = {local_name}.saturating_add(self.version + {offset});"
+            ),
+            "        } else {".to_string(),
+            format!("            {local_name} = {local_name}.saturating_sub({offset});"),
+            "        }".to_string(),
+            format!("        let {branch_name} = self.buffers.len().saturating_add({local_name});"),
+            format!("        self.version = self.version.saturating_add({branch_name});"),
+            format!("        Ok({branch_name})"),
+            "    }".to_string(),
+            "".to_string(),
+        ]);
+    }
+
+    lines.push("}".to_string());
+    lines.push("".to_string());
+    lines.push("pub fn normalize_path(path: &str) -> String {".to_string());
+    lines.push("    path.replace('\\\\', \"/\")".to_string());
+    lines.push("}".to_string());
+    lines
+}
+
+fn rewrite_local_block(lines: &mut [String], rng: &mut StdRng) {
+    for (line_index, line) in lines.iter_mut().enumerate() {
+        let suffix = identifier(rng, line_index + 10_000);
+        if line.contains("saturating_add") {
+            *line = format!(
+                "        let {suffix} = self.version.checked_add({line_index}).context(\"version overflow\")?;"
+            );
+        } else if line.contains("saturating_sub") {
+            *line = format!(
+                "            {suffix}.saturating_sub({});",
+                rng.random_range(8..256)
+            );
+        } else if line.trim().is_empty() {
+            *line =
+                format!("        tracing::trace!(target: \"agent_bench\", value = {line_index});");
+        } else {
+            *line = format!("{line} // updated {suffix}");
+        }
+    }
+}
+
+fn rewrite_many_small_lines(lines: &mut [String], every_nth_line: usize, rng: &mut StdRng) {
+    for (line_index, line) in lines.iter_mut().enumerate() {
+        if line_index.is_multiple_of(every_nth_line) || line.trim().is_empty() {
+            continue;
+        }
+
+        let suffix = identifier(rng, line_index + 20_000);
+        *line = format!("{line} // audited {suffix}");
+    }
+}
+
+fn insert_helper_blocks(
+    lines: &mut Vec<String>,
+    range: std::ops::Range<usize>,
+    every_nth_line: usize,
+    rng: &mut StdRng,
+) {
+    let mut line_index = range.start;
+    while line_index < range.end.min(lines.len()) {
+        if line_index.is_multiple_of(every_nth_line) && !lines[line_index].trim().is_empty() {
+            let suffix = identifier(rng, line_index + 30_000);
+            lines.splice(
+                line_index..line_index,
+                [
+                    format!("        let {suffix}_before = self.version;"),
+                    format!("        tracing::debug!(version = {suffix}_before);"),
+                ],
+            );
+            line_index += 2;
+        }
+        line_index += 1;
+    }
+}
+
+fn identifier(rng: &mut StdRng, salt: usize) -> String {
+    const PARTS: &[&str] = &[
+        "alpha", "beta", "gamma", "delta", "epsilon", "zeta", "theta", "lambda", "sigma", "omega",
+    ];
+    format!(
+        "{}_{}_{}",
+        PARTS[rng.random_range(0..PARTS.len())],
+        salt,
+        rng.random_range(0..10_000)
+    )
+}
+
+criterion_group!(benches, edit_file_tool_streaming);
+criterion_main!(benches);

crates/agent/src/db.rs

@@ -16,7 +16,7 @@ use sqlez::{
     connection::Connection,
     statement::Statement,
 };
-use std::sync::Arc;
+use std::{io::ErrorKind, path::PathBuf, sync::Arc};
 use ui::{App, SharedString};
 use util::path_list::PathList;
 use zed_env_vars::ZED_STATELESS;
@@ -53,7 +53,7 @@ impl From<&DbThreadMetadata> for acp_thread::AgentSessionInfo {
 #[derive(Debug, Serialize, Deserialize)]
 pub struct DbThread {
     pub title: SharedString,
-    pub messages: Vec<DbMessage>,
+    pub messages: Vec<Arc<DbMessage>>,
     pub updated_at: DateTime<Utc>,
     #[serde(default)]
     pub detailed_summary: Option<SharedString>,
@@ -81,6 +81,8 @@ pub struct DbThread {
     pub draft_prompt: Option<Vec<acp::ContentBlock>>,
     #[serde(default)]
     pub ui_scroll_position: Option<SerializedScrollPosition>,
+    #[serde(default)]
+    pub sandboxed_terminal_temp_dir: Option<PathBuf>,
 }
 
 #[derive(Debug, Clone, Copy, PartialEq, Serialize, Deserialize)]
@@ -92,7 +94,7 @@ pub struct SerializedScrollPosition {
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct SharedThread {
     pub title: SharedString,
-    pub messages: Vec<DbMessage>,
+    pub messages: Vec<Arc<DbMessage>>,
     pub updated_at: DateTime<Utc>,
     #[serde(default)]
     pub model: Option<DbLanguageModel>,
@@ -130,6 +132,7 @@ impl SharedThread {
             thinking_effort: None,
             draft_prompt: None,
             ui_scroll_position: None,
+            sandboxed_terminal_temp_dir: None,
         }
     }
 
@@ -206,7 +209,7 @@ impl DbThread {
                     crate::Message::User(UserMessage {
                         // MessageId from old format can't be meaningfully converted, so generate a new one
                         id,
-                        content,
+                        content: Arc::from(content),
                     })
                 }
                 language_model::Role::Assistant => {
@@ -285,7 +288,7 @@ impl DbThread {
                 }
             };
 
-            messages.push(message);
+            messages.push(Arc::new(message));
         }
 
         Ok(Self {
@@ -309,6 +312,7 @@ impl DbThread {
             thinking_effort: None,
             draft_prompt: None,
             ui_scroll_position: None,
+            sandboxed_terminal_temp_dir: None,
         })
     }
 }
@@ -569,15 +573,7 @@ impl ThreadsDatabase {
 
             let rows = select(id.0)?;
             if let Some((data_type, data)) = rows.into_iter().next() {
-                let json_data = match data_type {
-                    DataType::Zstd => {
-                        let decompressed = zstd::decode_all(&data[..])?;
-                        String::from_utf8(decompressed)?
-                    }
-                    DataType::Json => String::from_utf8(data)?,
-                };
-                let thread = DbThread::from_json(json_data.as_bytes())?;
-                Ok(Some(thread))
+                Ok(Some(Self::deserialize_thread(data_type, data)?))
             } else {
                 Ok(None)
             }
@@ -596,17 +592,71 @@ impl ThreadsDatabase {
             .spawn(async move { Self::save_thread_sync(&connection, id, thread, &folder_paths) })
     }
 
+    fn deserialize_thread(data_type: DataType, data: Vec<u8>) -> Result<DbThread> {
+        let json_data = match data_type {
+            DataType::Zstd => {
+                let decompressed = zstd::decode_all(&data[..])?;
+                String::from_utf8(decompressed)?
+            }
+            DataType::Json => String::from_utf8(data)?,
+        };
+        DbThread::from_json(json_data.as_bytes())
+    }
+
+    fn sandboxed_terminal_temp_dir(data_type: DataType, data: Vec<u8>) -> Option<PathBuf> {
+        match Self::deserialize_thread(data_type, data) {
+            Ok(thread) => thread.sandboxed_terminal_temp_dir,
+            Err(error) => {
+                log::warn!("failed to deserialize thread before deleting it: {error:#}");
+                None
+            }
+        }
+    }
+
+    fn remove_sandboxed_terminal_temp_dir(temp_dir: PathBuf) {
+        match std::fs::remove_dir_all(&temp_dir) {
+            Ok(()) => {}
+            Err(error) if error.kind() == ErrorKind::NotFound => {}
+            Err(error) => {
+                log::warn!(
+                    "failed to remove sandboxed terminal temp directory {}: {error}",
+                    temp_dir.display()
+                );
+            }
+        }
+    }
+
     pub fn delete_thread(&self, id: acp::SessionId) -> Task<Result<()>> {
         let connection = self.connection.clone();
 
         self.executor.spawn(async move {
-            let connection = connection.lock();
+            let sandboxed_terminal_temp_dir = {
+                let connection = connection.lock();
 
-            let mut delete = connection.exec_bound::<Arc<str>>(indoc! {"
-                DELETE FROM threads WHERE id = ?
-            "})?;
+                let mut select =
+                    connection.select_bound::<Arc<str>, (DataType, Vec<u8>)>(indoc! {"
+                    SELECT data_type, data FROM threads WHERE id = ? LIMIT 1
+                "})?;
 
-            delete(id.0)?;
+                let sandboxed_terminal_temp_dir = select(id.0.clone())?
+                    .into_iter()
+                    .next()
+                    .and_then(|(data_type, data)| {
+                        Self::sandboxed_terminal_temp_dir(data_type, data)
+                    });
+
+                let mut delete = connection.exec_bound::<Arc<str>>(indoc! {"
+                    DELETE FROM threads WHERE id = ?
+                "})?;
+
+                delete(id.0)?;
+
+                sandboxed_terminal_temp_dir
+            };
+
+            if let Some(temp_dir) = sandboxed_terminal_temp_dir {
+                Self::remove_sandboxed_terminal_temp_dir(temp_dir);
+            }
 
             Ok(())
         })
@@ -616,13 +666,32 @@ impl ThreadsDatabase {
         let connection = self.connection.clone();
 
         self.executor.spawn(async move {
-            let connection = connection.lock();
+            let sandboxed_terminal_temp_dirs = {
+                let connection = connection.lock();
 
-            let mut delete = connection.exec_bound::<()>(indoc! {"
-                DELETE FROM threads
-            "})?;
+                let mut select = connection.select_bound::<(), (DataType, Vec<u8>)>(indoc! {"
+                    SELECT data_type, data FROM threads
+                "})?;
 
-            delete(())?;
+                let sandboxed_terminal_temp_dirs = select(())?
+                    .into_iter()
+                    .filter_map(|(data_type, data)| {
+                        Self::sandboxed_terminal_temp_dir(data_type, data)
+                    })
+                    .collect::<Vec<_>>();
+
+                let mut delete = connection.exec_bound::<()>(indoc! {"
+                    DELETE FROM threads
+                "})?;
+
+                delete(())?;
+
+                sandboxed_terminal_temp_dirs
+            };
+
+            for temp_dir in sandboxed_terminal_temp_dirs {
+                Self::remove_sandboxed_terminal_temp_dir(temp_dir);
+            }
 
             Ok(())
         })
@@ -694,6 +763,7 @@ mod tests {
             thinking_effort: None,
             draft_prompt: None,
             ui_scroll_position: None,
+            sandboxed_terminal_temp_dir: None,
         }
     }
 
@@ -797,6 +867,78 @@ mod tests {
         );
     }
 
+    #[test]
+    fn test_sandboxed_terminal_temp_dir_defaults_to_none() {
+        let json = r#"{
+            "title": "Old Thread",
+            "messages": [],
+            "updated_at": "2024-01-01T00:00:00Z"
+        }"#;
+
+        let db_thread: DbThread = serde_json::from_str(json).expect("Failed to deserialize");
+
+        assert!(
+            db_thread.sandboxed_terminal_temp_dir.is_none(),
+            "Legacy threads without sandboxed_terminal_temp_dir should default to None"
+        );
+    }
+
+    #[gpui::test]
+    async fn test_sandboxed_terminal_temp_dir_roundtrips_through_save_load(
+        cx: &mut TestAppContext,
+    ) {
+        let database = ThreadsDatabase::new(cx.executor()).unwrap();
+        let thread_id = session_id("sandbox-temp-dir-thread");
+        let temp_dir = tempfile::Builder::new()
+            .prefix("zed-agent-terminal-test-")
+            .tempdir()
+            .unwrap()
+            .keep();
+        let mut thread = make_thread(
+            "Sandbox Temp Dir Thread",
+            Utc.with_ymd_and_hms(2024, 1, 1, 0, 0, 0).unwrap(),
+        );
+        thread.sandboxed_terminal_temp_dir = Some(temp_dir.clone());
+
+        database
+            .save_thread(thread_id.clone(), thread, PathList::default())
+            .await
+            .unwrap();
+
+        let loaded = database
+            .load_thread(thread_id)
+            .await
+            .unwrap()
+            .expect("thread should exist");
+        assert_eq!(loaded.sandboxed_terminal_temp_dir, Some(temp_dir.clone()));
+        std::fs::remove_dir_all(temp_dir).unwrap();
+    }
+
+    #[gpui::test]
+    async fn test_delete_thread_removes_sandboxed_terminal_temp_dir(cx: &mut TestAppContext) {
+        let database = ThreadsDatabase::new(cx.executor()).unwrap();
+        let thread_id = session_id("sandbox-temp-dir-delete-thread");
+        let temp_dir = tempfile::Builder::new()
+            .prefix("zed-agent-terminal-test-")
+            .tempdir()
+            .unwrap()
+            .keep();
+        std::fs::write(temp_dir.join("sentinel"), b"content").unwrap();
+        let mut thread = make_thread(
+            "Sandbox Temp Dir Delete Thread",
+            Utc.with_ymd_and_hms(2024, 1, 1, 0, 0, 0).unwrap(),
+        );
+        thread.sandboxed_terminal_temp_dir = Some(temp_dir.clone());
+
+        database
+            .save_thread(thread_id.clone(), thread, PathList::default())
+            .await
+            .unwrap();
+        database.delete_thread(thread_id).await.unwrap();
+
+        assert!(!temp_dir.exists());
+    }
+
     #[gpui::test]
     async fn test_subagent_context_roundtrips_through_save_load(cx: &mut TestAppContext) {
         let database = ThreadsDatabase::new(cx.executor()).unwrap();

crates/agent/src/native_agent_server.rs

@@ -9,9 +9,7 @@ use fs::Fs;
 use gpui::{App, Entity, Task};
 use language_model::{LanguageModelId, LanguageModelProviderId, LanguageModelRegistry};
 use project::{AgentId, Project};
-use prompt_store::PromptStore;
 use settings::{LanguageModelSelection, Settings as _, update_settings_file};
-use util::ResultExt as _;
 
 use crate::{NativeAgent, NativeAgentConnection, ThreadStore, templates::Templates};
 
@@ -45,15 +43,12 @@ impl AgentServer for NativeAgentServer {
         log::debug!("NativeAgentServer::connect");
         let fs = self.fs.clone();
         let thread_store = self.thread_store.clone();
-        let prompt_store = PromptStore::global(cx);
         cx.spawn(async move |cx| {
             log::debug!("Creating templates for native agent");
             let templates = Templates::new();
-            let prompt_store = prompt_store.await.log_err();
 
             log::debug!("Creating native agent entity");
-            let agent =
-                cx.update(|cx| NativeAgent::new(thread_store, templates, prompt_store, fs, cx));
+            let agent = cx.update(|cx| NativeAgent::new(thread_store, templates, fs, cx));
 
             // Create the connection wrapper
             let connection = NativeAgentConnection(agent);

crates/agent/src/outline.rs

@@ -11,10 +11,15 @@ pub const AUTO_OUTLINE_SIZE: usize = 16384;
 
 /// Result of getting buffer content, which can be either full content or an outline.
 pub struct BufferContent {
-    /// The actual content (either full text or outline)
+    /// The actual content (either full text, a symbol outline, or a
+    /// truncated fallback — see `is_synthetic`).
     pub text: String,
-    /// Whether this is an outline (true) or full content (false)
-    pub is_outline: bool,
+    /// `true` when `text` is not the file's full content — either a symbol
+    /// outline or the truncated first-1KB fallback used when no outline is
+    /// available. Callers that prefix line numbers to file content must
+    /// skip prefixing in this case, because line numbers in `text` would
+    /// not correspond to the file's real line numbers.
+    pub is_synthetic: bool,
 }
 
 /// Returns either the full content of a buffer or its outline, depending on size.
@@ -44,7 +49,10 @@ pub async fn get_buffer_content_or_outline(
                 .collect::<Vec<_>>()
         });
 
-        // If no outline exists, fall back to first 1KB so the agent has some context
+        // If no outline exists, fall back to first 1KB so the agent has some context.
+        // This is reported as `is_synthetic: true` because the returned text is not
+        // the file's full content — it has a synthetic header and is truncated — so
+        // callers must not attach real-file line numbers to it.
         if outline_items.is_empty() {
             let text = buffer.read_with(cx, |buffer, _| {
                 let snapshot = buffer.snapshot();
@@ -59,7 +67,7 @@ pub async fn get_buffer_content_or_outline(
 
             return Ok(BufferContent {
                 text,
-                is_outline: false,
+                is_synthetic: true,
             });
         }
 
@@ -72,14 +80,14 @@ pub async fn get_buffer_content_or_outline(
         };
         Ok(BufferContent {
             text,
-            is_outline: true,
+            is_synthetic: true,
         })
     } else {
         // File is small enough, return full content
         let text = buffer.read_with(cx, |buffer, _| buffer.text());
         Ok(BufferContent {
             text,
-            is_outline: false,
+            is_synthetic: false,
         })
     }
 }
@@ -196,10 +204,13 @@ mod tests {
             "Result did not contain content subset"
         );
 
-        // Should be marked as not an outline (it's truncated content)
+        // Should be marked synthetic: the returned text is not the file's full
+        // content (it's a truncated first-1KB fallback with a synthetic header), so
+        // callers must treat it the same as the symbol-outline case and not attach
+        // real-file line numbers to it.
         assert!(
-            !result.is_outline,
-            "Large file without outline should not be marked as outline"
+            result.is_synthetic,
+            "Truncated fallback should be reported as synthetic so callers skip line numbering"
         );
 
         // Should be reasonably sized (much smaller than original)

crates/agent/src/sandboxing.rs

@@ -0,0 +1,25 @@
+//! Agent-side glue for the [`sandbox`] crate.
+//!
+//! Centralizes the "should agent-run terminal commands be sandboxed for this
+//! process?" check so the system prompt, the terminal tool, and any other
+//! caller see the same answer (and so the `target_os` gate lives in one
+//! place instead of scattered across the agent crate).
+//!
+//! The current policy is: enabled iff we're on macOS *and* the user has the
+//! `sandboxing` feature flag turned on. There's deliberately no settings or
+//! env-var override yet — the flag is the only switch.
+//!
+//! On non-macOS hosts we don't have a sandbox integration today, so this
+//! returns `false` regardless of the flag.
+//!
+//! Naming note: this module is about agent terminal sandboxing specifically.
+//! Other agent operations (e.g. file edits) are gated separately.
+
+use feature_flags::{FeatureFlagAppExt as _, SandboxingFeatureFlag};
+use gpui::App;
+
+/// Whether agent-run terminal commands should be wrapped in an OS-level
+/// sandbox for this process. See module docs for the policy.
+pub(crate) fn sandboxing_enabled(cx: &App) -> bool {
+    cfg!(target_os = "macos") && cx.has_flag::<SandboxingFeatureFlag>()
+}

crates/agent/src/templates.rs

@@ -40,6 +40,15 @@ pub struct SystemPromptTemplate<'a> {
     pub available_tools: Vec<SharedString>,
     pub model_name: Option<String>,
     pub date: String,
+    /// Contents of the user-global `~/.config/zed/AGENTS.md` file (or the
+    /// platform equivalent), if present and non-empty.
+    pub user_agents_md: Option<SharedString>,
+    /// Whether agent-run terminal commands are wrapped in an OS-level
+    /// sandbox for this conversation. When `true`, the rendered prompt
+    /// describes the sandbox's read/write/network rules and the
+    /// per-command flags the model can request to relax them. When
+    /// `false`, the prompt omits the sandbox section entirely.
+    pub sandboxing: bool,
 }
 
 impl Template for SystemPromptTemplate<'_> {
@@ -80,9 +89,11 @@ mod tests {
         let project = prompt_store::ProjectContext::default();
         let template = SystemPromptTemplate {
             project: &project,
-            available_tools: vec!["echo".into(), "update_plan".into()],
+            available_tools: vec!["echo".into(), "update_plan".into(), "update_title".into()],
             model_name: Some("test-model".to_string()),
             date: "2026-01-01".to_string(),
+            user_agents_md: None,
+            sandboxing: false,
         };
         let templates = Templates::new();
         let rendered = template.render(&templates).unwrap();
@@ -90,6 +101,152 @@ mod tests {
         assert!(rendered.contains("Today's Date: 2026-01-01"));
         assert!(rendered.contains("## Fixing Diagnostics"));
         assert!(rendered.contains("## Planning"));
+        assert!(rendered.contains("## Session Title"));
         assert!(rendered.contains("test-model"));
     }
+
+    #[test]
+    fn test_system_prompt_renders_user_agents_md_before_project_rules() {
+        use prompt_store::{ProjectContext, RulesFileContext, WorktreeContext};
+        use util::rel_path::RelPath;
+
+        let worktrees = vec![WorktreeContext {
+            root_name: "my-project".to_string(),
+            abs_path: std::path::Path::new("/tmp/my-project").into(),
+            rules_file: Some(RulesFileContext {
+                path_in_worktree: RelPath::unix("AGENTS.md").unwrap().into(),
+                text: "project-specific guidance".to_string(),
+                project_entry_id: 1,
+            }),
+        }];
+        let project = ProjectContext::new(worktrees);
+        let template = SystemPromptTemplate {
+            project: &project,
+            available_tools: vec!["echo".into()],
+            model_name: Some("test-model".to_string()),
+            date: "2026-01-01".to_string(),
+            user_agents_md: Some("always be concise".into()),
+            sandboxing: false,
+        };
+        let templates = Templates::new();
+        let rendered = template.render(&templates).unwrap();
+
+        assert!(rendered.contains("### Personal `AGENTS.md`"));
+        assert!(rendered.contains("always be concise"));
+        assert!(rendered.contains("### Project Rules"));
+        assert!(rendered.contains("project-specific guidance"));
+
+        let personal_idx = rendered.find("### Personal `AGENTS.md`").unwrap();
+        let project_idx = rendered.find("### Project Rules").unwrap();
+        assert!(
+            personal_idx < project_idx,
+            "personal AGENTS.md should render before project rules so project rules can override it"
+        );
+    }
+
+    #[test]
+    fn test_system_prompt_omits_sandbox_section_when_sandboxing_disabled() {
+        let project = prompt_store::ProjectContext::default();
+        let template = SystemPromptTemplate {
+            project: &project,
+            available_tools: vec!["echo".into()],
+            model_name: Some("test-model".to_string()),
+            date: "2026-01-01".to_string(),
+            user_agents_md: None,
+            sandboxing: false,
+        };
+        let templates = Templates::new();
+        let rendered = template.render(&templates).unwrap();
+        assert!(!rendered.contains("## Terminal sandbox"));
+        assert!(!rendered.contains("allow_network"));
+    }
+
+    #[test]
+    fn test_system_prompt_renders_sandbox_section_with_worktrees_when_enabled() {
+        use prompt_store::{ProjectContext, WorktreeContext};
+
+        let worktrees = vec![
+            WorktreeContext {
+                root_name: "alpha".to_string(),
+                abs_path: std::path::Path::new("/tmp/alpha").into(),
+                rules_file: None,
+            },
+            WorktreeContext {
+                root_name: "beta".to_string(),
+                abs_path: std::path::Path::new("/tmp/beta").into(),
+                rules_file: None,
+            },
+        ];
+        let project = ProjectContext::new(worktrees);
+        let template = SystemPromptTemplate {
+            project: &project,
+            available_tools: vec!["echo".into()],
+            model_name: Some("test-model".to_string()),
+            date: "2026-01-01".to_string(),
+            user_agents_md: None,
+            sandboxing: true,
+        };
+        let templates = Templates::new();
+        let rendered = template.render(&templates).unwrap();
+
+        assert!(rendered.contains("## Terminal sandbox"));
+        assert!(rendered.contains("`/tmp/alpha`"));
+        assert!(rendered.contains("`/tmp/beta`"));
+        assert!(rendered.contains("allow_network: true"));
+        assert!(rendered.contains("allow_fs_write: true"));
+        assert!(rendered.contains("unsandboxed: true"));
+        assert!(rendered.contains("remain in effect for the entire duration"));
+    }
+
+    #[test]
+    fn test_system_prompt_sandbox_section_handles_zero_worktrees() {
+        let project = prompt_store::ProjectContext::default();
+        let template = SystemPromptTemplate {
+            project: &project,
+            available_tools: vec!["echo".into()],
+            model_name: Some("test-model".to_string()),
+            date: "2026-01-01".to_string(),
+            user_agents_md: None,
+            sandboxing: true,
+        };
+        let templates = Templates::new();
+        let rendered = template.render(&templates).unwrap();
+
+        assert!(rendered.contains("## Terminal sandbox"));
+        assert!(rendered.contains("No project directories are currently writable"));
+    }
+
+    #[test]
+    fn test_system_prompt_omits_user_agents_md_section_when_absent() {
+        let project = prompt_store::ProjectContext::default();
+        let template = SystemPromptTemplate {
+            project: &project,
+            available_tools: vec!["echo".into()],
+            model_name: Some("test-model".to_string()),
+            date: "2026-01-01".to_string(),
+            user_agents_md: None,
+            sandboxing: false,
+        };
+        let templates = Templates::new();
+        let rendered = template.render(&templates).unwrap();
+        assert!(!rendered.contains("### Personal `AGENTS.md`"));
+    }
+
+    #[test]
+    fn test_system_prompt_does_not_render_legacy_zed_rules_section() {
+        let project = prompt_store::ProjectContext::default();
+        let template = SystemPromptTemplate {
+            project: &project,
+            available_tools: vec!["echo".into()],
+            model_name: Some("test-model".to_string()),
+            date: "2026-01-01".to_string(),
+            user_agents_md: None,
+            sandboxing: false,
+        };
+        let templates = Templates::new();
+        let rendered = template.render(&templates).unwrap();
+
+        assert!(!rendered.contains("The user has specified the following rules"));
+        assert!(!rendered.contains("Rules title:"));
+    }
 }

crates/agent/src/templates/experimental_system_prompt.hbs

@@ -52,6 +52,17 @@ Use a plan when:
 - The user asked you to do more than one thing in a single prompt.
 - You discover additional steps while working and intend to complete them before yielding to the user.
 
+{{/if}}
+{{#if (contains available_tools 'update_title') }}
+## Session Title
+
+- Use the `update_title` tool to set the title shown to the user for the current session.
+- You MUST set a title at least once, even for small tasks. Do it early in the conversation, after the first user message, before you start working. There is no title to begin with, so you are responsible for setting one.
+- Update the title again whenever the goal changes materially.
+- Titles are very important to communicate to the user what you are working on. A session should always have a title.
+- Keep titles concise and specific. Prefer a short noun phrase over a full sentence, and do not wrap the title in quotes.
+- Do not mention that you changed the title unless it is directly relevant to the user.
+
 {{/if}}
 ## Searching and Reading
 
@@ -162,12 +173,11 @@ The current project contains the following root directories:
 You are powered by the model named {{model_name}}.
 
 {{/if}}
-{{#if (or has_rules has_user_rules)}}
+{{#if has_rules}}
 ## User's Custom Instructions
 
 The following additional instructions are provided by the user and should be followed to the best of your ability{{#if (gt (len available_tools) 0)}} without interfering with the tool use guidelines{{/if}}.
 
-{{#if has_rules}}
 There are project rules that apply to these root directories:
 {{#each worktrees}}
 {{#if rules_file}}
@@ -178,17 +188,3 @@ There are project rules that apply to these root directories:
 {{/if}}
 {{/each}}
 {{/if}}
-
-{{#if has_user_rules}}
-The user has specified the following rules that should be applied:
-{{#each user_rules}}
-
-{{#if title}}
-Rules title: {{title}}
-{{/if}}
-``````
-{{contents}}
-``````
-{{/each}}
-{{/if}}
-{{/if}}

crates/agent/src/templates/system_prompt.hbs

@@ -23,15 +23,13 @@ graph TD
     A[Start] --> B[End]
 ```
 
+The renderer supports the following diagram types: flowchart, sequence, class, state, ER, gantt, pie, gitgraph, mindmap, timeline, quadrant chart, xy chart, and journey. Other diagram types will only show as code.
+
 Mermaid diagrams are automatically themed to match the user's editor theme. Do not include `%%{init}%%` directives or define your own `classDef` styles.
 
 Do *NOT* include inline HTML elements in mermaid diagrams, as they cannot be rendered. It is better to simply skip formatting (e.g. bold/italic/etc.).
 
-When you need accent colors for emphasis (e.g. color-coding layers, categories, or states), use the pre-defined classes `accent0` through `accent7` with the `:::` syntax:
-
-    A:::accent0 --> B:::accent1 --> C:::accent2
-
-These classes automatically match the user's theme. Do not hardcode hex color values unless an exact color match is specifically required. Note that the rendered view may be narrow, so try to prioritize generating taller diagrams over wider ones.
+Mermaid diagrams are automatically color-coded using the user's theme accent palette. Do not hardcode hex color values unless an exact color match is specifically required. Note that the rendered view may be narrow, so try to prioritize generating taller diagrams over wider ones.
 
 {{#if (gt (len available_tools) 0)}}
 ## Tool Use
@@ -74,6 +72,17 @@ Use a plan when:
 - The user asked you to do more than one thing in a single prompt.
 - You discover additional steps while working and intend to complete them before yielding to the user.
 
+{{/if}}
+{{#if (contains available_tools 'update_title') }}
+## Session Title
+
+- Use the `update_title` tool to set the title shown to the user for the current session.
+- You MUST set a title at least once, even for small tasks. Do it early in the conversation, after the first user message, before you start working. There is no title to begin with, so you are responsible for setting one.
+- Update the title again whenever the goal changes materially.
+- Titles are very important to communicate to the user what you are working on. A session should always have a title.
+- Keep titles concise and specific. Prefer a short noun phrase over a full sentence, and do not wrap the title in quotes.
+- Do not mention that you changed the title unless it is directly relevant to the user.
+
 {{/if}}
 ## Searching and Reading
 
@@ -178,6 +187,24 @@ The current project contains the following root directories:
 - `{{abs_path}}`
 {{/each}}
 
+{{#if sandboxing}}
+## Terminal sandbox
+
+The `terminal` tool runs commands inside a sandbox with these permissions:
+
+- Reads: any path on the filesystem is readable.
+- Writes: a per-thread temporary directory exposed via `$TMPDIR`, `$TMP`, and `$TEMP` is writable and persists across `terminal` calls in this conversation{{#if worktrees}}, along with these project directories:
+{{#each worktrees}}
+  - `{{abs_path}}`
+{{/each}}
+  Writes anywhere else on the filesystem are blocked.{{else}}. No project directories are currently writable.{{/if}}
+- Network: outbound network access is blocked.
+
+You can request elevated permissions on individual `terminal` calls by setting `allow_network: true`, `allow_fs_write: true`, or `unsandboxed: true`. The user will be prompted to approve before the command runs.
+
+These sandbox settings are guaranteed to remain in effect for the entire duration of this conversation. If they ever change, you will be told.
+
+{{/if}}
 {{#if model_name}}
 ## Model Information
 
@@ -212,12 +239,26 @@ To use a Skill:
 4. If the Skill references additional files, use `read_file` to access them. Paths inside a Skill resolve relative to that Skill's directory (the parent of its `SKILL.md`).
 
 {{/if}}
-{{#if (or has_rules has_user_rules)}}
+{{#if (or user_agents_md has_rules)}}
 ## User's Custom Instructions
 
 The following additional instructions are provided by the user and should be followed to the best of your ability{{#if (gt (len available_tools) 0)}} without interfering with the tool use guidelines{{/if}}.
 
+{{#if user_agents_md}}
+### Personal `AGENTS.md`
+
+These instructions apply to every project this user opens. Project-specific rules below may override them.
+
+``````
+{{{user_agents_md}}}
+``````
+
+{{/if}}
 {{#if has_rules}}
+### Project Rules
+
+These instructions are scoped to the current project. They take precedence over the personal `AGENTS.md` above when they conflict.
+
 There are project rules that apply to these root directories:
 {{#each worktrees}}
 {{#if rules_file}}
@@ -229,16 +270,4 @@ There are project rules that apply to these root directories:
 {{/each}}
 {{/if}}
 
-{{#if has_user_rules}}
-The user has specified the following rules that should be applied:
-{{#each user_rules}}
-
-{{#if title}}
-Rules title: {{title}}
-{{/if}}
-``````
-{{contents}}
-``````
-{{/each}}
-{{/if}}
 {{/if}}

crates/agent/src/tests/mod.rs

@@ -26,10 +26,10 @@ use gpui::{
 use indoc::indoc;
 use language_model::{
     CompletionIntent, LanguageModel, LanguageModelCompletionError, LanguageModelCompletionEvent,
-    LanguageModelId, LanguageModelProviderId, LanguageModelProviderName, LanguageModelRegistry,
-    LanguageModelRequest, LanguageModelRequestMessage, LanguageModelToolResult,
-    LanguageModelToolSchemaFormat, LanguageModelToolUse, MessageContent, Role, StopReason,
-    TokenUsage,
+    LanguageModelId, LanguageModelImageExt, LanguageModelProviderId, LanguageModelProviderName,
+    LanguageModelRegistry, LanguageModelRequest, LanguageModelRequestMessage,
+    LanguageModelToolResult, LanguageModelToolSchemaFormat, LanguageModelToolUse, MessageContent,
+    Role, StopReason, TokenUsage,
     fake_provider::{FakeLanguageModel, FakeLanguageModelProvider},
 };
 use pretty_assertions::assert_eq;
@@ -200,8 +200,10 @@ impl crate::ThreadEnvironment for FakeThreadEnvironment {
     fn create_terminal(
         &self,
         _command: String,
+        _extra_env: Vec<acp::EnvVariable>,
         _cwd: Option<std::path::PathBuf>,
         _output_byte_limit: Option<u64>,
+        _sandbox_wrap: Option<acp_thread::SandboxWrap>,
         _cx: &mut AsyncApp,
     ) -> Task<Result<Rc<dyn crate::TerminalHandle>>> {
         self.terminal_creations.fetch_add(1, Ordering::SeqCst);
@@ -242,8 +244,10 @@ impl crate::ThreadEnvironment for MultiTerminalEnvironment {
     fn create_terminal(
         &self,
         _command: String,
+        _extra_env: Vec<acp::EnvVariable>,
         _cwd: Option<std::path::PathBuf>,
         _output_byte_limit: Option<u64>,
+        _sandbox_wrap: Option<acp_thread::SandboxWrap>,
         cx: &mut AsyncApp,
     ) -> Task<Result<Rc<dyn crate::TerminalHandle>>> {
         let handle = Rc::new(cx.update(|cx| FakeTerminalHandle::new_never_exits(cx)));
@@ -320,6 +324,7 @@ async fn test_terminal_tool_timeout_kills_handle(cx: &mut TestAppContext) {
                 command: "sleep 1000".to_string(),
                 cd: ".".to_string(),
                 timeout_ms: Some(5),
+                ..Default::default()
             }),
             event_stream,
             cx,
@@ -387,6 +392,7 @@ async fn test_terminal_tool_without_timeout_does_not_kill_handle(cx: &mut TestAp
                 command: "sleep 1000".to_string(),
                 cd: ".".to_string(),
                 timeout_ms: None,
+                ..Default::default()
             }),
             event_stream,
             cx,
@@ -1656,6 +1662,7 @@ async fn test_mcp_tool_multi_content_response(cx: &mut TestAppContext) {
 
     let (tool_call_params, tool_call_response) = mcp_tool_calls.next().await.unwrap();
     assert_eq!(tool_call_params.name, "screenshot");
+    let image_data = "iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR4nGP4z8DwHwAFAAH/iZk9HQAAAABJRU5ErkJggg==";
     tool_call_response
         .send(context_server::types::CallToolResponse {
             content: vec![
@@ -1663,7 +1670,7 @@ async fn test_mcp_tool_multi_content_response(cx: &mut TestAppContext) {
                     text: "Some text".into(),
                 },
                 context_server::types::ToolResponseContent::Image {
-                    data: "aGVsbG8=".into(),
+                    data: image_data.into(),
                     mime_type: "image/png".into(),
                 },
                 context_server::types::ToolResponseContent::Text {
@@ -1691,13 +1698,25 @@ async fn test_mcp_tool_multi_content_response(cx: &mut TestAppContext) {
         })
         .expect("expected a tool result");
     assert_eq!(tool_result.tool_use_id, "tool_1".into());
-    assert_eq!(tool_result.content.len(), 2);
+    assert_eq!(tool_result.content.len(), 3);
+    assert_eq!(
+        tool_result.content[0],
+        language_model::LanguageModelToolResultContent::Text(Arc::from("Some text"))
+    );
+    let expected_image =
+        language_model::LanguageModelImage::from_base64_image(image_data, "image/png")
+            .expect("image conversion should not error")
+            .expect("image conversion should succeed");
     assert_eq!(
         tool_result.content[0],
         language_model::LanguageModelToolResultContent::Text(Arc::from("Some text"))
     );
     assert_eq!(
         tool_result.content[1],
+        language_model::LanguageModelToolResultContent::Image(expected_image)
+    );
+    assert_eq!(
+        tool_result.content[2],
         language_model::LanguageModelToolResultContent::Text(Arc::from("Some more text"))
     );
     fake_model.end_last_completion_stream();
@@ -3507,8 +3526,8 @@ async fn test_agent_connection(cx: &mut TestAppContext) {
     let thread_store = cx.new(|cx| ThreadStore::new(cx));
 
     // Create agent and connection
-    let agent = cx
-        .update(|cx| NativeAgent::new(thread_store, templates.clone(), None, fake_fs.clone(), cx));
+    let agent =
+        cx.update(|cx| NativeAgent::new(thread_store, templates.clone(), fake_fs.clone(), cx));
     let connection = NativeAgentConnection(agent.clone());
 
     // Create a thread using new_thread
@@ -3794,6 +3813,155 @@ async fn test_update_plan_tool_updates_thread_events(cx: &mut TestAppContext) {
     );
 }
 
+#[gpui::test]
+async fn test_update_title_tool_sets_thread_title(cx: &mut TestAppContext) {
+    let ThreadTest { thread, model, .. } = setup(cx, TestModel::Fake).await;
+    let fake_model = model.as_fake();
+    let summary_model = Arc::new(FakeLanguageModel::default());
+
+    cx.update(|cx| {
+        cx.update_flags(true, vec!["update-title-tool".to_string()]);
+    });
+    thread.update(cx, |thread, cx| {
+        thread.add_tool(UpdateTitleTool::new(cx.weak_entity()));
+        thread.set_summarization_model(Some(summary_model.clone()), cx);
+    });
+
+    let mut events = thread
+        .update(cx, |thread, cx| {
+            thread.send(UserMessageId::new(), ["Explore title tooling"], cx)
+        })
+        .unwrap();
+    cx.run_until_parked();
+
+    let input = json!({
+        "title": "Session title tool"
+    });
+    fake_model.send_last_completion_stream_event(LanguageModelCompletionEvent::ToolUse(
+        LanguageModelToolUse {
+            id: "title_1".into(),
+            name: UpdateTitleTool::NAME.into(),
+            raw_input: input.to_string(),
+            input,
+            is_input_complete: true,
+            thought_signature: None,
+        },
+    ));
+    fake_model.end_last_completion_stream();
+    cx.run_until_parked();
+
+    let tool_call = expect_tool_call(&mut events).await;
+    assert_eq!(
+        tool_call,
+        acp::ToolCall::new("title_1", "Update title: Session title tool")
+            .kind(acp::ToolKind::Think)
+            .raw_input(json!({
+                "title": "Session title tool"
+            }))
+            .meta(acp::Meta::from_iter([(
+                "tool_name".into(),
+                "update_title".into()
+            )]))
+    );
+
+    let update = expect_tool_call_update_fields(&mut events).await;
+    assert_eq!(
+        update,
+        acp::ToolCallUpdate::new(
+            "title_1",
+            acp::ToolCallUpdateFields::new().status(acp::ToolCallStatus::InProgress)
+        )
+    );
+
+    let update = expect_tool_call_update_fields(&mut events).await;
+    assert_eq!(
+        update,
+        acp::ToolCallUpdate::new(
+            "title_1",
+            acp::ToolCallUpdateFields::new()
+                .status(acp::ToolCallStatus::Completed)
+                .raw_output("Session title updated")
+        )
+    );
+
+    thread.read_with(cx, |thread, _| {
+        assert_eq!(thread.title(), Some("Session title tool".into()));
+    });
+    assert_eq!(summary_model.pending_completions(), Vec::new());
+}
+
+#[gpui::test]
+async fn test_update_title_availability_suppresses_summary_title_generation(
+    cx: &mut TestAppContext,
+) {
+    let ThreadTest { thread, model, .. } = setup(cx, TestModel::Fake).await;
+    let fake_model = model.as_fake();
+    let summary_model = Arc::new(FakeLanguageModel::default());
+
+    cx.update(|cx| {
+        cx.update_flags(true, vec!["update-title-tool".to_string()]);
+    });
+    thread.update(cx, |thread, cx| {
+        thread.add_tool(UpdateTitleTool::new(cx.weak_entity()));
+        thread.set_summarization_model(Some(summary_model.clone()), cx);
+    });
+
+    let send = thread
+        .update(cx, |thread, cx| {
+            thread.send(UserMessageId::new(), ["Explore title tooling"], cx)
+        })
+        .unwrap();
+    cx.run_until_parked();
+
+    fake_model.send_last_completion_stream_text_chunk("Done");
+    fake_model.end_last_completion_stream();
+    send.collect::<Vec<_>>().await;
+    cx.run_until_parked();
+
+    thread.read_with(cx, |thread, _| {
+        assert_eq!(thread.title(), None);
+    });
+    assert_eq!(summary_model.pending_completions(), Vec::new());
+}
+
+#[gpui::test]
+async fn test_update_title_flag_without_available_tool_falls_back_to_summary_title_generation(
+    cx: &mut TestAppContext,
+) {
+    let ThreadTest { thread, model, .. } = setup(cx, TestModel::Fake).await;
+    let fake_model = model.as_fake();
+    let summary_model = Arc::new(FakeLanguageModel::default());
+
+    cx.update(|cx| {
+        cx.update_flags(true, vec!["update-title-tool".to_string()]);
+    });
+    thread.update(cx, |thread, cx| {
+        thread.set_summarization_model(Some(summary_model.clone()), cx);
+    });
+
+    let send = thread
+        .update(cx, |thread, cx| {
+            thread.send(UserMessageId::new(), ["Explore title tooling"], cx)
+        })
+        .unwrap();
+    cx.run_until_parked();
+
+    fake_model.send_last_completion_stream_text_chunk("Done");
+    fake_model.end_last_completion_stream();
+    cx.run_until_parked();
+
+    assert_eq!(summary_model.pending_completions().len(), 1);
+
+    summary_model.send_last_completion_stream_text_chunk("Fallback title");
+    summary_model.end_last_completion_stream();
+    send.collect::<Vec<_>>().await;
+    cx.run_until_parked();
+
+    thread.read_with(cx, |thread, _| {
+        assert_eq!(thread.title(), Some("Fallback title".into()));
+    });
+}
+
 #[gpui::test]
 async fn test_send_no_retry_on_success(cx: &mut TestAppContext) {
     let ThreadTest { thread, model, .. } = setup(cx, TestModel::Fake).await;
@@ -3971,8 +4139,8 @@ async fn test_send_retry_finishes_tool_calls_on_error(cx: &mut TestAppContext) {
     events.collect::<Vec<_>>().await;
     thread.read_with(cx, |thread, _cx| {
         assert_eq!(
-            thread.last_received_or_pending_message(),
-            Some(Message::Agent(AgentMessage {
+            thread.last_received_or_pending_message().as_deref(),
+            Some(&Message::Agent(AgentMessage {
                 content: vec![AgentMessageContent::Text("Done".into())],
                 tool_results: IndexMap::default(),
                 reasoning_details: None,
@@ -4307,6 +4475,7 @@ async fn setup(cx: &mut TestAppContext, model: TestModel) -> ThreadTest {
                             StreamingFailingEchoTool::NAME: true,
                             TerminalTool::NAME: true,
                             UpdatePlanTool::NAME: true,
+                            UpdateTitleTool::NAME: true,
                         }
                     }
                 }
@@ -4389,7 +4558,7 @@ async fn setup(cx: &mut TestAppContext, model: TestModel) -> ThreadTest {
 }
 
 #[cfg(test)]
-#[ctor::ctor]
+#[ctor::ctor(unsafe)]
 fn init_logger() {
     if std::env::var("RUST_LOG").is_ok() {
         env_logger::init();
@@ -4729,6 +4898,7 @@ async fn test_terminal_tool_permission_rules(cx: &mut TestAppContext) {
                     command: "rm -rf /".to_string(),
                     cd: ".".to_string(),
                     timeout_ms: None,
+                    ..Default::default()
                 }),
                 event_stream,
                 cx,
@@ -4781,6 +4951,7 @@ async fn test_terminal_tool_permission_rules(cx: &mut TestAppContext) {
                     command: "echo hello".to_string(),
                     cd: ".".to_string(),
                     timeout_ms: None,
+                    ..Default::default()
                 }),
                 event_stream,
                 cx,
@@ -4839,6 +5010,7 @@ async fn test_terminal_tool_permission_rules(cx: &mut TestAppContext) {
                     command: "sudo rm file".to_string(),
                     cd: ".".to_string(),
                     timeout_ms: None,
+                    ..Default::default()
                 }),
                 event_stream,
                 cx,
@@ -4886,6 +5058,7 @@ async fn test_terminal_tool_permission_rules(cx: &mut TestAppContext) {
                     command: "echo hello".to_string(),
                     cd: ".".to_string(),
                     timeout_ms: None,
+                    ..Default::default()
                 }),
                 event_stream,
                 cx,
@@ -4928,9 +5101,8 @@ async fn test_subagent_tool_call_end_to_end(cx: &mut TestAppContext) {
     .await;
     let project = Project::test(fs.clone(), [path!("/a").as_ref()], cx).await;
     let thread_store = cx.new(|cx| ThreadStore::new(cx));
-    let agent = cx.update(|cx| {
-        NativeAgent::new(thread_store.clone(), Templates::new(), None, fs.clone(), cx)
-    });
+    let agent =
+        cx.update(|cx| NativeAgent::new(thread_store.clone(), Templates::new(), fs.clone(), cx));
     let connection = Rc::new(NativeAgentConnection(agent.clone()));
 
     let acp_thread = cx
@@ -5063,9 +5235,8 @@ async fn test_subagent_tool_output_does_not_include_thinking(cx: &mut TestAppCon
     .await;
     let project = Project::test(fs.clone(), [path!("/a").as_ref()], cx).await;
     let thread_store = cx.new(|cx| ThreadStore::new(cx));
-    let agent = cx.update(|cx| {
-        NativeAgent::new(thread_store.clone(), Templates::new(), None, fs.clone(), cx)
-    });
+    let agent =
+        cx.update(|cx| NativeAgent::new(thread_store.clone(), Templates::new(), fs.clone(), cx));
     let connection = Rc::new(NativeAgentConnection(agent.clone()));
 
     let acp_thread = cx
@@ -5211,9 +5382,8 @@ async fn test_subagent_tool_call_cancellation_during_task_prompt(cx: &mut TestAp
     .await;
     let project = Project::test(fs.clone(), [path!("/a").as_ref()], cx).await;
     let thread_store = cx.new(|cx| ThreadStore::new(cx));
-    let agent = cx.update(|cx| {
-        NativeAgent::new(thread_store.clone(), Templates::new(), None, fs.clone(), cx)
-    });
+    let agent =
+        cx.update(|cx| NativeAgent::new(thread_store.clone(), Templates::new(), fs.clone(), cx));
     let connection = Rc::new(NativeAgentConnection(agent.clone()));
 
     let acp_thread = cx
@@ -5341,9 +5511,8 @@ async fn test_subagent_tool_resume_session(cx: &mut TestAppContext) {
     .await;
     let project = Project::test(fs.clone(), [path!("/a").as_ref()], cx).await;
     let thread_store = cx.new(|cx| ThreadStore::new(cx));
-    let agent = cx.update(|cx| {
-        NativeAgent::new(thread_store.clone(), Templates::new(), None, fs.clone(), cx)
-    });
+    let agent =
+        cx.update(|cx| NativeAgent::new(thread_store.clone(), Templates::new(), fs.clone(), cx));
     let connection = Rc::new(NativeAgentConnection(agent.clone()));
 
     let acp_thread = cx
@@ -5874,9 +6043,8 @@ async fn test_subagent_context_window_warning(cx: &mut TestAppContext) {
     .await;
     let project = Project::test(fs.clone(), [path!("/a").as_ref()], cx).await;
     let thread_store = cx.new(|cx| ThreadStore::new(cx));
-    let agent = cx.update(|cx| {
-        NativeAgent::new(thread_store.clone(), Templates::new(), None, fs.clone(), cx)
-    });
+    let agent =
+        cx.update(|cx| NativeAgent::new(thread_store.clone(), Templates::new(), fs.clone(), cx));
     let connection = Rc::new(NativeAgentConnection(agent.clone()));
 
     let acp_thread = cx
@@ -6000,9 +6168,8 @@ async fn test_subagent_no_context_window_warning_when_already_at_warning(cx: &mu
     .await;
     let project = Project::test(fs.clone(), [path!("/a").as_ref()], cx).await;
     let thread_store = cx.new(|cx| ThreadStore::new(cx));
-    let agent = cx.update(|cx| {
-        NativeAgent::new(thread_store.clone(), Templates::new(), None, fs.clone(), cx)
-    });
+    let agent =
+        cx.update(|cx| NativeAgent::new(thread_store.clone(), Templates::new(), fs.clone(), cx));
     let connection = Rc::new(NativeAgentConnection(agent.clone()));
 
     let acp_thread = cx
@@ -6174,9 +6341,8 @@ async fn test_subagent_error_propagation(cx: &mut TestAppContext) {
     .await;
     let project = Project::test(fs.clone(), [path!("/a").as_ref()], cx).await;
     let thread_store = cx.new(|cx| ThreadStore::new(cx));
-    let agent = cx.update(|cx| {
-        NativeAgent::new(thread_store.clone(), Templates::new(), None, fs.clone(), cx)
-    });
+    let agent =
+        cx.update(|cx| NativeAgent::new(thread_store.clone(), Templates::new(), fs.clone(), cx));
     let connection = Rc::new(NativeAgentConnection(agent.clone()));
 
     let acp_thread = cx

crates/agent/src/thread.rs

@@ -4,12 +4,14 @@ use crate::{
     FindPathTool, FindReferencesTool, GetCodeActionsTool, GoToDefinitionTool, GrepTool,
     ListDirectoryTool, MovePathTool, ProjectSnapshot, ReadFileTool, RenameTool, SpawnAgentTool,
     SystemPromptTemplate, Template, Templates, TerminalTool, ToolPermissionDecision,
-    UpdatePlanTool, WebSearchTool, WriteFileTool, decide_permission_from_settings,
+    UpdatePlanTool, UpdateTitleTool, WebSearchTool, WriteFileTool, decide_permission_from_settings,
 };
 use acp_thread::{MentionUri, UserMessageId};
 use action_log::ActionLog;
+use agent_settings::UserAgentsMd;
 use feature_flags::{
     FeatureFlagAppExt as _, LspToolFeatureFlag, RenameToolFeatureFlag, UpdatePlanToolFeatureFlag,
+    UpdateTitleToolFeatureFlag,
 };
 
 use agent_client_protocol::schema as acp;
@@ -49,16 +51,16 @@ use serde::{Deserialize, Serialize};
 use settings::{
     LanguageModelSelection, Settings, SettingsStore, ToolPermissionMode, update_settings_file,
 };
+use std::fmt::Write;
 use std::{
     collections::BTreeMap,
     marker::PhantomData,
     ops::RangeInclusive,
-    path::Path,
+    path::{Path, PathBuf},
     rc::Rc,
     sync::Arc,
     time::{Duration, Instant},
 };
-use std::{fmt::Write, path::PathBuf};
 use util::{ResultExt, debug_panic, markdown::MarkdownCodeBlock, paths::PathStyle};
 use uuid::Uuid;
 
@@ -121,7 +123,7 @@ enum RetryStrategy {
     },
 }
 
-#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
+#[derive(Debug, PartialEq, Eq, Serialize, Deserialize)]
 pub enum Message {
     User(UserMessage),
     Agent(AgentMessage),
@@ -174,13 +176,16 @@ impl Message {
 #[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
 pub struct UserMessage {
     pub id: UserMessageId,
-    pub content: Vec<UserMessageContent>,
+    pub content: Arc<[UserMessageContent]>,
 }
 
 #[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
 pub enum UserMessageContent {
     Text(String),
-    Mention { uri: MentionUri, content: String },
+    Mention {
+        uri: MentionUri,
+        content: SharedString,
+    },
     Image(LanguageModelImage),
 }
 
@@ -188,7 +193,7 @@ impl UserMessage {
     pub fn to_markdown(&self) -> String {
         let mut markdown = String::new();
 
-        for content in &self.content {
+        for content in &*self.content {
             match content {
                 UserMessageContent::Text(text) => {
                     markdown.push_str(text);
@@ -233,6 +238,8 @@ impl UserMessage {
         const OPEN_DIAGNOSTICS_TAG: &str = "<diagnostics>";
         const OPEN_DIFFS_TAG: &str = "<diffs>";
         const MERGE_CONFLICT_TAG: &str = "<merge_conflicts>";
+        const OPEN_SKILLS_TAG: &str =
+            "<skills>\nThe user has attached the following agent skills:\n";
 
         let mut file_context = OPEN_FILES_TAG.to_string();
         let mut directory_context = OPEN_DIRECTORIES_TAG.to_string();
@@ -244,8 +251,9 @@ impl UserMessage {
         let mut diagnostics_context = OPEN_DIAGNOSTICS_TAG.to_string();
         let mut diffs_context = OPEN_DIFFS_TAG.to_string();
         let mut merge_conflict_context = MERGE_CONFLICT_TAG.to_string();
+        let mut skills_context = OPEN_SKILLS_TAG.to_string();
 
-        for chunk in &self.content {
+        for chunk in &*self.content {
             let chunk = match chunk {
                 UserMessageContent::Text(text) => {
                     language_model::MessageContent::Text(text.clone())
@@ -261,7 +269,7 @@ impl UserMessage {
                                 "\n{}",
                                 MarkdownCodeBlock {
                                     tag: &codeblock_tag(abs_path, None),
-                                    text: &content.to_string(),
+                                    text: content,
                                 }
                             )
                             .ok();
@@ -308,17 +316,6 @@ impl UserMessage {
                         MentionUri::Thread { .. } => {
                             write!(&mut thread_context, "\n{}\n", content).ok();
                         }
-                        MentionUri::Rule { .. } => {
-                            write!(
-                                &mut rules_context,
-                                "\n{}",
-                                MarkdownCodeBlock {
-                                    tag: "",
-                                    text: content
-                                }
-                            )
-                            .ok();
-                        }
                         MentionUri::Fetch { url } => {
                             write!(&mut fetch_context, "\nFetch: {}\n\n{}", url, content).ok();
                         }
@@ -360,6 +357,10 @@ impl UserMessage {
                             )
                             .ok();
                         }
+                        MentionUri::Skill { name, source, .. } => {
+                            let label = format!("{} ({})", name, source);
+                            write!(&mut skills_context, "\nSkill: {}\n{}\n", label, content).ok();
+                        }
                     }
 
                     language_model::MessageContent::Text(uri.as_link().to_string())
@@ -434,6 +435,13 @@ impl UserMessage {
                 .push(language_model::MessageContent::Text(diagnostics_context));
         }
 
+        if skills_context.len() > OPEN_SKILLS_TAG.len() {
+            skills_context.push_str("</skills>\n");
+            message
+                .content
+                .push(language_model::MessageContent::Text(skills_context));
+        }
+
         if merge_conflict_context.len() > MERGE_CONFLICT_TAG.len() {
             merge_conflict_context.push_str("</merge_conflicts>\n");
             message
@@ -611,9 +619,9 @@ impl AgentMessage {
 
 #[derive(Default, Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
 pub struct AgentMessage {
-    pub content: Vec<AgentMessageContent>,
-    pub tool_results: IndexMap<LanguageModelToolUseId, LanguageModelToolResult>,
-    pub reasoning_details: Option<serde_json::Value>,
+    pub(crate) content: Vec<AgentMessageContent>,
+    pub(crate) tool_results: IndexMap<LanguageModelToolUseId, LanguageModelToolResult>,
+    pub(crate) reasoning_details: Option<Arc<serde_json::Value>>,
 }
 
 #[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
@@ -649,8 +657,10 @@ pub trait ThreadEnvironment {
     fn create_terminal(
         &self,
         command: String,
+        extra_env: Vec<acp::EnvVariable>,
         cwd: Option<PathBuf>,
         output_byte_limit: Option<u64>,
+        sandbox_wrap: Option<acp_thread::SandboxWrap>,
         cx: &mut AsyncApp,
     ) -> Task<Result<Rc<dyn TerminalHandle>>>;
 
@@ -947,7 +957,7 @@ pub struct Thread {
     title_generation_failed: bool,
     pending_summary_generation: Option<Shared<Task<Option<SharedString>>>>,
     summary: Option<SharedString>,
-    messages: Vec<Message>,
+    messages: Vec<Arc<Message>>,
     user_store: Entity<UserStore>,
     /// Holds the task that handles agent interaction until the end of the turn.
     /// Survives across multiple requests as the model performs tool calls and
@@ -986,6 +996,7 @@ pub struct Thread {
     /// Weak references to running subagent threads for cancellation propagation
     running_subagents: Vec<WeakEntity<Thread>>,
     inherits_parent_model_settings: bool,
+    sandboxed_terminal_temp_dir: Option<PathBuf>,
 }
 
 impl Thread {
@@ -1112,6 +1123,7 @@ impl Thread {
             ui_scroll_position: None,
             running_subagents: Vec::new(),
             inherits_parent_model_settings: true,
+            sandboxed_terminal_temp_dir: None,
         }
     }
 
@@ -1155,6 +1167,30 @@ impl Thread {
         &self.id
     }
 
+    pub(crate) fn sandboxed_terminal_temp_dir(
+        &mut self,
+        cx: &mut Context<Self>,
+    ) -> Result<PathBuf> {
+        if let Some(temp_dir) = &self.sandboxed_terminal_temp_dir {
+            std::fs::create_dir_all(temp_dir).with_context(|| {
+                format!(
+                    "failed to recreate sandboxed terminal temp directory {}",
+                    temp_dir.display()
+                )
+            })?;
+            return Ok(temp_dir.clone());
+        }
+
+        let temp_dir = tempfile::Builder::new()
+            .prefix("zed-agent-terminal-")
+            .tempdir()
+            .context("failed to create sandboxed terminal temp directory")?;
+        let temp_dir = temp_dir.keep();
+        self.sandboxed_terminal_temp_dir = Some(temp_dir.clone());
+        cx.notify();
+        Ok(temp_dir)
+    }
+
     /// Returns true if this thread was imported from a shared thread.
     pub fn is_imported(&self) -> bool {
         self.imported
@@ -1167,7 +1203,7 @@ impl Thread {
         let (tx, rx) = mpsc::unbounded();
         let stream = ThreadEventStream(tx);
         for message in &self.messages {
-            match message {
+            match &**message {
                 Message::User(user_message) => stream.send_user_message(user_message),
                 Message::Agent(assistant_message) => {
                     for content in &assistant_message.content {
@@ -1201,10 +1237,10 @@ impl Thread {
         stream: &ThreadEventStream,
         cx: &mut Context<Self>,
     ) {
-        // Extract saved output and status first, so they're available even if tool is not found
         let output = tool_result
             .as_ref()
             .and_then(|result| result.output.clone());
+        let replay_content = tool_result.and_then(Self::tool_result_content_for_replay);
         let status = tool_result
             .as_ref()
             .map_or(acp::ToolCallStatus::Failed, |result| {
@@ -1233,21 +1269,25 @@ impl Thread {
             // but still display the saved result if available.
             // We need to send both ToolCall and ToolCallUpdate events because the UI
             // only converts raw_output to displayable content in update_fields, not from_acp.
+            let title = Self::title_for_replayed_tool_use(tool_use);
             stream
                 .0
                 .unbounded_send(Ok(ThreadEvent::ToolCall(
-                    acp::ToolCall::new(tool_use.id.to_string(), tool_use.name.to_string())
+                    acp::ToolCall::new(tool_use.id.to_string(), title.clone())
                         .status(status)
                         .raw_input(tool_use.input.clone()),
                 )))
                 .ok();
-            stream.update_tool_call_fields(
-                &tool_use.id,
-                acp::ToolCallUpdateFields::new()
-                    .status(status)
-                    .raw_output(output),
-                None,
-            );
+            let mut fields = acp::ToolCallUpdateFields::new()
+                .status(status)
+                .raw_output(output);
+            if tool_use.name.as_ref() == UpdateTitleTool::NAME {
+                fields = fields.title(title);
+            }
+            if let Some(content) = replay_content {
+                fields = fields.content(content);
+            }
+            stream.update_tool_call_fields(&tool_use.id, fields, None);
             return;
         };
 
@@ -1261,6 +1301,14 @@ impl Thread {
             tool_use.input.clone(),
         );
 
+        if let Some(content) = replay_content {
+            stream.update_tool_call_fields(
+                &tool_use.id,
+                acp::ToolCallUpdateFields::new().content(content),
+                None,
+            );
+        }
+
         if let Some(output) = output.clone() {
             // For replay, we use a dummy cancellation receiver since the tool already completed
             let (_cancellation_tx, cancellation_rx) = watch::channel(false);
@@ -1283,6 +1331,55 @@ impl Thread {
         );
     }
 
+    fn title_for_replayed_tool_use(tool_use: &LanguageModelToolUse) -> String {
+        if tool_use.name.as_ref() == UpdateTitleTool::NAME {
+            let input = serde_json::from_value(tool_use.input.clone())
+                .map_err(|_| serde_json::Value::String(tool_use.raw_input.clone()));
+            UpdateTitleTool::title_for_input(input).to_string()
+        } else {
+            tool_use.name.to_string()
+        }
+    }
+
+    fn tool_result_content_for_replay(
+        tool_result: &LanguageModelToolResult,
+    ) -> Option<Vec<acp::ToolCallContent>> {
+        let has_image = tool_result
+            .content
+            .iter()
+            .any(|part| matches!(part, LanguageModelToolResultContent::Image(_)));
+        if !has_image && tool_result.output.is_some() {
+            return None;
+        }
+
+        let content = tool_result
+            .content
+            .iter()
+            .filter_map(|part| match part {
+                LanguageModelToolResultContent::Text(text) => {
+                    if text.is_empty() {
+                        None
+                    } else {
+                        Some(acp::ToolCallContent::Content(acp::Content::new(
+                            acp::ContentBlock::Text(acp::TextContent::new(text.to_string())),
+                        )))
+                    }
+                }
+                LanguageModelToolResultContent::Image(image) => Some(
+                    acp::ToolCallContent::Content(acp::Content::new(acp::ContentBlock::Image(
+                        acp::ImageContent::new(image.source.clone(), "image/png"),
+                    ))),
+                ),
+            })
+            .collect::<Vec<_>>();
+
+        if content.is_empty() {
+            None
+        } else {
+            Some(content)
+        }
+    }
+
     pub fn from_db(
         id: acp::SessionId,
         db_thread: DbThread,
@@ -1369,6 +1466,7 @@ impl Thread {
             }),
             running_subagents: Vec::new(),
             inherits_parent_model_settings: true,
+            sandboxed_terminal_temp_dir: db_thread.sandboxed_terminal_temp_dir,
         }
     }
 
@@ -1399,6 +1497,7 @@ impl Thread {
                     offset_in_item: lo.offset_in_item.as_f32(),
                 }
             }),
+            sandboxed_terminal_temp_dir: self.sandboxed_terminal_temp_dir.clone(),
         };
 
         cx.background_spawn(async move {
@@ -1562,13 +1661,13 @@ impl Thread {
     }
 
     pub fn last_message(&self) -> Option<&Message> {
-        self.messages.last()
+        self.messages.last().map(std::ops::Deref::deref)
     }
 
     #[cfg(any(test, feature = "test-support"))]
-    pub fn last_received_or_pending_message(&self) -> Option<Message> {
+    pub fn last_received_or_pending_message(&self) -> Option<Arc<Message>> {
         if let Some(message) = self.pending_message.clone() {
-            Some(Message::Agent(message))
+            Some(Arc::new(Message::Agent(message)))
         } else {
             self.messages.last().cloned()
         }
@@ -1609,6 +1708,9 @@ impl Thread {
         if cx.has_flag::<UpdatePlanToolFeatureFlag>() {
             self.add_tool(UpdatePlanTool);
         }
+        if cx.has_flag::<UpdateTitleToolFeatureFlag>() {
+            self.add_tool(UpdateTitleTool::new(cx.weak_entity()));
+        }
         self.add_tool(ReadFileTool::new(
             self.project.clone(),
             self.action_log.clone(),
@@ -1722,13 +1824,13 @@ impl Thread {
         // and we don't want that content to be added after we truncate
         self.pending_message.take();
         let Some(position) = self.messages.iter().position(
-            |msg| matches!(msg, Message::User(UserMessage { id, .. }) if id == &message_id),
+            |msg| matches!(&**msg, Message::User(UserMessage { id, .. }) if id == &message_id),
         ) else {
             return Err(anyhow!("Message not found"));
         };
 
         for message in self.messages.drain(position..) {
-            match message {
+            match &*message {
                 Message::User(message) => {
                     self.request_token_usage.remove(&message.id);
                 }
@@ -1770,7 +1872,7 @@ impl Thread {
         let mut previous_user_message_id: Option<&UserMessageId> = None;
 
         for message in &self.messages {
-            if let Message::User(user_msg) = message {
+            if let Message::User(user_msg) = &**message {
                 if &user_msg.id == target_id {
                     let prev_id = previous_user_message_id?;
                     let usage = self.request_token_usage.get(prev_id)?;
@@ -1815,7 +1917,7 @@ impl Thread {
         &mut self,
         cx: &mut Context<Self>,
     ) -> Result<mpsc::UnboundedReceiver<Result<ThreadEvent>>> {
-        self.messages.push(Message::Resume);
+        self.messages.push(Arc::new(Message::Resume));
         cx.notify();
 
         log::debug!("Total messages in thread: {}", self.messages.len());
@@ -1834,11 +1936,11 @@ impl Thread {
     where
         T: Into<UserMessageContent>,
     {
-        let content = content.into_iter().map(Into::into).collect::<Vec<_>>();
+        let content = content.into_iter().map(Into::into).collect::<Arc<_>>();
         log::debug!("Thread::send content: {:?}", content);
 
         self.messages
-            .push(Message::User(UserMessage { id, content }));
+            .push(Arc::new(Message::User(UserMessage { id, content })));
         cx.notify();
 
         self.send_existing(cx)
@@ -1869,9 +1971,9 @@ impl Thread {
         let content = blocks
             .into_iter()
             .map(|block| UserMessageContent::from_content_block(block, path_style))
-            .collect::<Vec<_>>();
+            .collect::<Arc<_>>();
         self.messages
-            .push(Message::User(UserMessage { id, content }));
+            .push(Arc::new(Message::User(UserMessage { id, content })));
         cx.notify();
     }
 
@@ -1889,10 +1991,10 @@ impl Thread {
             _ => "[unknown]".to_string(),
         };
 
-        self.messages.push(Message::Agent(AgentMessage {
+        self.messages.push(Arc::new(Message::Agent(AgentMessage {
             content: vec![AgentMessageContent::Text(text)],
             ..Default::default()
-        }));
+        })));
         cx.notify();
     }
 
@@ -2122,7 +2224,7 @@ impl Thread {
 
             this.update(cx, |this, cx| {
                 this.flush_pending_message(cx);
-                if this.title.is_none() && this.pending_title_generation.is_none() {
+                if this.title.is_none() {
                     this.generate_title(cx);
                 }
             })?;
@@ -2150,10 +2252,10 @@ impl Thread {
                     }
                 }
                 this.update(cx, |this, _cx| {
-                    if let Some(Message::Agent(message)) = this.messages.last() {
+                    if let Some(Message::Agent(message)) = this.last_message() {
                         if message.tool_results.is_empty() {
                             intent = CompletionIntent::UserPrompt;
-                            this.messages.push(Message::Resume);
+                            this.messages.push(Arc::new(Message::Resume));
                         }
                     }
                 })?;
@@ -2276,12 +2378,12 @@ impl Thread {
                 let last_message = self.pending_message();
                 // Store the last non-empty reasoning_details (overwrites earlier ones)
                 // This ensures we keep the encrypted reasoning with signatures, not the early text reasoning
-                if let serde_json::Value::Array(ref arr) = details {
+                if let serde_json::Value::Array(arr) = &details {
                     if !arr.is_empty() {
-                        last_message.reasoning_details = Some(details);
+                        last_message.reasoning_details = Some(Arc::new(details));
                     }
                 } else {
-                    last_message.reasoning_details = Some(details);
+                    last_message.reasoning_details = Some(Arc::new(details));
                 }
             }
             ToolUse(tool_use) => {
@@ -2651,6 +2753,20 @@ impl Thread {
         self.title_generation_failed
     }
 
+    pub fn can_generate_title(&self, cx: &App) -> bool {
+        self.pending_title_generation.is_none()
+            && self.summarization_model.is_some()
+            && !self.update_title_tool_available(cx)
+    }
+
+    fn update_title_tool_available(&self, cx: &App) -> bool {
+        if let Some(running_turn) = self.running_turn.as_ref() {
+            running_turn.tools.contains_key(UpdateTitleTool::NAME)
+        } else {
+            self.enabled_tools(cx).contains_key(UpdateTitleTool::NAME)
+        }
+    }
+
     pub fn summary(&mut self, cx: &mut Context<Self>) -> Shared<Task<Option<SharedString>>> {
         if let Some(summary) = self.summary.as_ref() {
             return Task::ready(Some(summary.clone())).shared();
@@ -2712,6 +2828,10 @@ impl Thread {
     }
 
     pub fn generate_title(&mut self, cx: &mut Context<Self>) {
+        if !self.can_generate_title(cx) {
+            return;
+        }
+
         self.title_generation_failed = false;
         let Some(model) = self.summarization_model.clone() else {
             return;
@@ -2797,7 +2917,7 @@ impl Thread {
         self.messages
             .iter()
             .rev()
-            .find_map(|message| match message {
+            .find_map(|message| match &**message {
                 Message::User(user_message) => Some(user_message),
                 Message::Agent(_) => None,
                 Message::Resume => None,
@@ -2838,7 +2958,7 @@ impl Thread {
             }
         }
 
-        self.messages.push(Message::Agent(message));
+        self.messages.push(Arc::new(Message::Agent(message)));
         self.updated_at = Utc::now();
         self.clear_summary();
         cx.notify()
@@ -3063,11 +3183,14 @@ impl Thread {
             self.messages.len()
         );
 
+        let user_agents_md = UserAgentsMd::global(cx).and_then(|s| s.content().cloned());
         let system_prompt = SystemPromptTemplate {
             project: self.project_context.read(cx),
             available_tools,
             model_name: self.model.as_ref().map(|m| m.name().0.to_string()),
             date: Local::now().format("%Y-%m-%d").to_string(),
+            user_agents_md,
+            sandboxing: crate::sandboxing::sandboxing_enabled(cx),
         }
         .render(&self.templates)
         .context("failed to build system prompt")
@@ -3099,7 +3222,7 @@ impl Thread {
             if ix > 0 {
                 markdown.push('\n');
             }
-            match message {
+            match &**message {
                 Message::User(_) => markdown.push_str("## User\n\n"),
                 Message::Agent(_) => markdown.push_str("## Assistant\n\n"),
                 Message::Resume => {}
@@ -4311,7 +4434,7 @@ impl UserMessageContent {
                 match MentionUri::parse(&resource_link.uri, path_style) {
                     Ok(uri) => Self::Mention {
                         uri,
-                        content: String::new(),
+                        content: SharedString::default(),
                     },
                     Err(err) => {
                         log::error!("Failed to parse mention link: {}", err);
@@ -4324,7 +4447,7 @@ impl UserMessageContent {
                     match MentionUri::parse(&resource.uri, path_style) {
                         Ok(uri) => Self::Mention {
                             uri,
-                            content: resource.text,
+                            content: resource.text.into(),
                         },
                         Err(err) => {
                             log::error!("Failed to parse mention link: {}", err);
@@ -4374,7 +4497,6 @@ impl From<UserMessageContent> for acp::ContentBlock {
 fn convert_image(image_content: acp::ImageContent) -> LanguageModelImage {
     LanguageModelImage {
         source: image_content.data.into(),
-        size: None,
     }
 }
 
@@ -4439,6 +4561,259 @@ mod tests {
         })
     }
 
+    struct ReplayImageTool;
+
+    impl AgentTool for ReplayImageTool {
+        type Input = ();
+        type Output = String;
+
+        const NAME: &'static str = "registered_image_tool";
+
+        fn kind() -> acp::ToolKind {
+            acp::ToolKind::Other
+        }
+
+        fn initial_title(
+            &self,
+            _input: Result<Self::Input, serde_json::Value>,
+            _cx: &mut App,
+        ) -> SharedString {
+            "Registered Image Tool".into()
+        }
+
+        fn run(
+            self: Arc<Self>,
+            _input: ToolInput<Self::Input>,
+            _event_stream: ToolCallEventStream,
+            _cx: &mut App,
+        ) -> Task<Result<Self::Output, Self::Output>> {
+            Task::ready(Ok(String::new()))
+        }
+    }
+
+    #[gpui::test]
+    async fn test_replay_tool_call_replays_image_content(cx: &mut TestAppContext) {
+        let (thread, _event_stream) = setup_thread_for_test(cx).await;
+
+        let registered_tool_use_id = LanguageModelToolUseId::from("registered_tool_id");
+        let missing_tool_use_id = LanguageModelToolUseId::from("missing_tool_id");
+        let image_data = "iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR4nGP4z8DwHwAFAAH/iZk9HQAAAABJRU5ErkJggg==";
+        let image = LanguageModelImage {
+            source: image_data.into(),
+        };
+
+        let mut replay_events = cx.update(|cx| {
+            thread.update(cx, |thread, cx| {
+                thread.add_tool(ReplayImageTool);
+
+                let registered_tool_use = LanguageModelToolUse {
+                    id: registered_tool_use_id.clone(),
+                    name: ReplayImageTool::NAME.into(),
+                    raw_input: "null".to_string(),
+                    input: json!(null),
+                    is_input_complete: true,
+                    thought_signature: None,
+                };
+                let missing_tool_use = LanguageModelToolUse {
+                    id: missing_tool_use_id.clone(),
+                    name: "missing_image_tool".into(),
+                    raw_input: "{}".to_string(),
+                    input: json!({}),
+                    is_input_complete: true,
+                    thought_signature: None,
+                };
+
+                let mut tool_results = IndexMap::default();
+                tool_results.insert(
+                    registered_tool_use_id.clone(),
+                    LanguageModelToolResult {
+                        tool_use_id: registered_tool_use_id.clone(),
+                        tool_name: ReplayImageTool::NAME.into(),
+                        is_error: false,
+                        content: vec![
+                            LanguageModelToolResultContent::Text("before".into()),
+                            LanguageModelToolResultContent::Image(image.clone()),
+                            LanguageModelToolResultContent::Text("after".into()),
+                        ],
+                        output: Some(json!("raw output")),
+                    },
+                );
+                tool_results.insert(
+                    missing_tool_use_id.clone(),
+                    LanguageModelToolResult {
+                        tool_use_id: missing_tool_use_id.clone(),
+                        tool_name: "missing_image_tool".into(),
+                        is_error: false,
+                        content: vec![LanguageModelToolResultContent::Image(image.clone())],
+                        output: Some(json!("raw output")),
+                    },
+                );
+
+                thread.messages.push(Arc::new(Message::Agent(AgentMessage {
+                    content: vec![
+                        AgentMessageContent::ToolUse(registered_tool_use),
+                        AgentMessageContent::ToolUse(missing_tool_use),
+                    ],
+                    tool_results,
+                    reasoning_details: None,
+                })));
+
+                thread.replay(cx)
+            })
+        });
+
+        let mut tool_use_ids_with_image_content = HashSet::default();
+        while let Some(event) = replay_events.next().await {
+            let event = event.unwrap();
+            if let ThreadEvent::ToolCallUpdate(acp_thread::ToolCallUpdate::UpdateFields(update)) =
+                event
+                && let Some(content) = &update.fields.content
+                && content.iter().any(|content| {
+                    matches!(
+                        content,
+                        acp::ToolCallContent::Content(acp::Content {
+                            content: acp::ContentBlock::Image(_),
+                            ..
+                        })
+                    )
+                })
+            {
+                tool_use_ids_with_image_content.insert(update.tool_call_id.to_string());
+            }
+        }
+
+        assert!(tool_use_ids_with_image_content.contains(&registered_tool_use_id.to_string()));
+        assert!(tool_use_ids_with_image_content.contains(&missing_tool_use_id.to_string()));
+    }
+
+    #[gpui::test]
+    async fn test_update_title_tool_replay_does_not_reenter_thread(cx: &mut TestAppContext) {
+        let (thread, _event_stream) = setup_thread_for_test(cx).await;
+
+        let tool_use_id = LanguageModelToolUseId::from("title_tool_id");
+        let mut replay_events = cx.update(|cx| {
+            thread.update(cx, |thread, cx| {
+                thread.add_tool(UpdateTitleTool::new(cx.weak_entity()));
+                push_completed_update_title_tool_call(thread, tool_use_id.clone());
+
+                thread.replay(cx)
+            })
+        });
+
+        let mut saw_tool_call_title = false;
+        let mut saw_replayed_title_update = false;
+        let mut saw_completed_update = false;
+        while let Some(event) = replay_events.next().await {
+            let event = event.unwrap();
+            match event {
+                ThreadEvent::ToolCall(tool_call)
+                    if tool_call.tool_call_id.to_string() == tool_use_id.to_string()
+                        && tool_call.title == "Update title: Replayed title" =>
+                {
+                    saw_tool_call_title = true;
+                }
+                ThreadEvent::ToolCallUpdate(acp_thread::ToolCallUpdate::UpdateFields(update))
+                    if update.tool_call_id.to_string() == tool_use_id.to_string() =>
+                {
+                    if update.fields.title == Some("Update title: Replayed title".to_string()) {
+                        saw_replayed_title_update = true;
+                    }
+                    if update.fields.status == Some(acp::ToolCallStatus::Completed) {
+                        saw_completed_update = true;
+                    }
+                }
+                _ => {}
+            }
+        }
+
+        assert!(saw_tool_call_title);
+        assert!(saw_replayed_title_update);
+        assert!(saw_completed_update);
+        thread.read_with(cx, |thread, _cx| {
+            assert_eq!(thread.title(), None);
+        });
+    }
+
+    #[gpui::test]
+    async fn test_update_title_tool_replay_title_when_tool_not_registered(cx: &mut TestAppContext) {
+        let (thread, _event_stream) = setup_thread_for_test(cx).await;
+
+        let tool_use_id = LanguageModelToolUseId::from("title_tool_id");
+        let mut replay_events = cx.update(|cx| {
+            thread.update(cx, |thread, cx| {
+                push_completed_update_title_tool_call(thread, tool_use_id.clone());
+                thread.replay(cx)
+            })
+        });
+
+        let mut saw_tool_call_title = false;
+        let mut saw_replayed_title_update = false;
+        let mut saw_completed_update = false;
+        while let Some(event) = replay_events.next().await {
+            let event = event.unwrap();
+            match event {
+                ThreadEvent::ToolCall(tool_call)
+                    if tool_call.tool_call_id.to_string() == tool_use_id.to_string()
+                        && tool_call.title == "Update title: Replayed title" =>
+                {
+                    saw_tool_call_title = true;
+                }
+                ThreadEvent::ToolCallUpdate(acp_thread::ToolCallUpdate::UpdateFields(update))
+                    if update.tool_call_id.to_string() == tool_use_id.to_string() =>
+                {
+                    if update.fields.title == Some("Update title: Replayed title".to_string()) {
+                        saw_replayed_title_update = true;
+                    }
+                    if update.fields.status == Some(acp::ToolCallStatus::Completed) {
+                        saw_completed_update = true;
+                    }
+                }
+                _ => {}
+            }
+        }
+
+        assert!(saw_tool_call_title);
+        assert!(saw_replayed_title_update);
+        assert!(saw_completed_update);
+        thread.read_with(cx, |thread, _cx| {
+            assert_eq!(thread.title(), None);
+        });
+    }
+
+    fn push_completed_update_title_tool_call(
+        thread: &mut Thread,
+        tool_use_id: LanguageModelToolUseId,
+    ) {
+        let tool_use = LanguageModelToolUse {
+            id: tool_use_id.clone(),
+            name: UpdateTitleTool::NAME.into(),
+            raw_input: json!({ "title": "Replayed title" }).to_string(),
+            input: json!({ "title": "Replayed title" }),
+            is_input_complete: true,
+            thought_signature: None,
+        };
+
+        let mut tool_results = IndexMap::default();
+        tool_results.insert(
+            tool_use_id.clone(),
+            LanguageModelToolResult {
+                tool_use_id,
+                tool_name: UpdateTitleTool::NAME.into(),
+                is_error: false,
+                content: vec![LanguageModelToolResultContent::Text(
+                    "Session title updated".into(),
+                )],
+                output: Some(json!("Session title updated")),
+            },
+        );
+
+        thread.messages.push(Arc::new(Message::Agent(AgentMessage {
+            content: vec![AgentMessageContent::ToolUse(tool_use)],
+            tool_results,
+            reasoning_details: None,
+        })));
+    }
+
     #[gpui::test]
     async fn test_set_model_propagates_to_subagents(cx: &mut TestAppContext) {
         let (parent, _event_stream) = setup_thread_for_test(cx).await;

crates/agent/src/thread_store.rs

@@ -167,6 +167,7 @@ mod tests {
             thinking_effort: None,
             draft_prompt: None,
             ui_scroll_position: None,
+            sandboxed_terminal_temp_dir: None,
         }
     }
 

crates/agent/src/tools.rs

@@ -24,6 +24,7 @@ mod symbol_locator;
 mod terminal_tool;
 mod tool_permissions;
 mod update_plan_tool;
+mod update_title_tool;
 mod web_search_tool;
 mod write_file_tool;
 
@@ -80,6 +81,7 @@ pub use symbol_locator::*;
 pub use terminal_tool::*;
 pub use tool_permissions::*;
 pub use update_plan_tool::*;
+pub use update_title_tool::*;
 pub use web_search_tool::*;
 pub use write_file_tool::*;
 
@@ -172,6 +174,7 @@ tools! {
     SpawnAgentTool,
     TerminalTool,
     UpdatePlanTool,
+    UpdateTitleTool,
     WebSearchTool,
     WriteFileTool,
 }

crates/agent/src/tools/context_server_registry.rs

@@ -5,7 +5,7 @@ use collections::{BTreeMap, HashMap};
 use context_server::{ContextServerId, client::NotificationSubscription};
 use futures::FutureExt as _;
 use gpui::{App, AppContext, AsyncApp, Context, Entity, EventEmitter, SharedString, Task};
-use language_model::LanguageModelToolResultContent;
+use language_model::{LanguageModelImage, LanguageModelImageExt, LanguageModelToolResultContent};
 use project::context_server_store::{ContextServerStatus, ContextServerStore};
 use std::sync::Arc;
 use util::ResultExt;
@@ -261,7 +261,8 @@ impl ContextServerRegistry {
             }
             ContextServerStatus::Stopped
             | ContextServerStatus::Error(_)
-            | ContextServerStatus::AuthRequired => {
+            | ContextServerStatus::AuthRequired
+            | ContextServerStatus::ClientSecretRequired { .. } => {
                 if let Some(registered_server) = self.registered_servers.remove(server_id) {
                     if !registered_server.tools.is_empty() {
                         cx.emit(ContextServerRegistryEvent::ToolsChanged);
@@ -346,7 +347,7 @@ impl AnyAgentTool for ContextServerTool {
         let authorize =
             event_stream.authorize_third_party_tool(initial_title, tool_id, display_name, cx);
 
-        cx.spawn(async move |_cx| {
+        cx.spawn(async move |cx| {
             let input = input
                 .recv()
                 .await
@@ -394,15 +395,50 @@ impl AnyAgentTool for ContextServerTool {
             }
 
             let mut llm_output = Vec::new();
+            let mut tool_call_content = Vec::new();
             let mut concatenated_text = String::new();
             for content in response.content {
                 match content {
                     context_server::types::ToolResponseContent::Text { text } => {
                         concatenated_text.push_str(&text);
+                        tool_call_content.push(acp::ToolCallContent::Content(acp::Content::new(
+                            acp::ContentBlock::Text(acp::TextContent::new(text.clone())),
+                        )));
                         llm_output.push(LanguageModelToolResultContent::Text(text.into()));
                     }
-                    context_server::types::ToolResponseContent::Image { .. } => {
-                        log::warn!("Ignoring image content from tool response");
+                    context_server::types::ToolResponseContent::Image { data, mime_type } => {
+                        tool_call_content.push(acp::ToolCallContent::Content(acp::Content::new(
+                            acp::ContentBlock::Image(acp::ImageContent::new(
+                                data.clone(),
+                                mime_type.clone(),
+                            )),
+                        )));
+                        let language_model_image = cx
+                            .background_spawn({
+                                let mime_type = mime_type.clone();
+                                async move {
+                                    LanguageModelImage::from_base64_image(&data, &mime_type)
+                                }
+                            })
+                            .await;
+                        match language_model_image {
+                            Ok(Some(image)) => {
+                                llm_output.push(LanguageModelToolResultContent::Image(image));
+                            }
+                            Ok(None) => {
+                                log::warn!(
+                                    "Skipping MCP tool response image with MIME type `{}` because it cannot be converted for language model input",
+                                    mime_type
+                                );
+                            }
+                            Err(error) => {
+                                log::warn!(
+                                    "Failed to convert MCP tool response image with MIME type `{}` for language model input: {:#}",
+                                    mime_type,
+                                    error
+                                );
+                            }
+                        }
                     }
                     context_server::types::ToolResponseContent::Audio { .. } => {
                         log::warn!("Ignoring audio content from tool response");
@@ -415,6 +451,10 @@ impl AnyAgentTool for ContextServerTool {
                     }
                 }
             }
+            if !tool_call_content.is_empty() {
+                event_stream
+                    .update_fields(acp::ToolCallUpdateFields::new().content(tool_call_content));
+            }
             let raw_output = serde_json::Value::String(concatenated_text);
             Ok(AgentToolOutput {
                 raw_output,

crates/agent/src/tools/copy_path_tool.rs

@@ -1,5 +1,6 @@
 use super::tool_permissions::{
     authorize_symlink_escapes, canonicalize_worktree_roots, collect_symlink_escapes,
+    resolve_creatable_global_skill_descendant_path, resolve_global_skill_descendant_path,
     sensitive_settings_kind,
 };
 use crate::{
@@ -23,6 +24,7 @@ use util::markdown::MarkdownInlineCode;
 ///
 /// This tool should be used when it's desirable to create a copy of a file or directory without modifying the original.
 /// It's much more efficient than doing this by separately reading and then writing the file or directory's contents, so this tool should be preferred over that approach whenever copying is the goal.
+/// The only supported paths outside the project are descendants of `~/.agents/skills`, for global agent skills.
 #[derive(Debug, Serialize, Deserialize, JsonSchema)]
 pub struct CopyPathToolInput {
     /// The source path of the file or directory to copy.
@@ -100,6 +102,15 @@ impl AgentTool for CopyPathTool {
             let fs = project.read_with(cx, |project, _cx| project.fs().clone());
             let canonical_roots = canonicalize_worktree_roots(&project, &fs, cx).await;
 
+            let global_source_path =
+                resolve_global_skill_descendant_path(Path::new(&input.source_path), fs.as_ref())
+                    .await;
+            let global_destination_path = resolve_creatable_global_skill_descendant_path(
+                Path::new(&input.destination_path),
+                fs.as_ref(),
+            )
+            .await;
+
             let symlink_escapes: Vec<(&str, std::path::PathBuf)> =
                 project.read_with(cx, |project, cx| {
                     collect_symlink_escapes(
@@ -160,6 +171,63 @@ impl AgentTool for CopyPathTool {
                 authorize.await.map_err(|e| e.to_string())?;
             }
 
+            if global_source_path.is_some() || global_destination_path.is_some() {
+                let source_path = if let Some(global_source_path) = global_source_path {
+                    global_source_path
+                } else {
+                    project.read_with(cx, |project, cx| {
+                        let project_path = project.find_project_path(&input.source_path, cx).ok_or_else(|| {
+                            format!("Source path {} was not found in the project.", input.source_path)
+                        })?;
+                        project.entry_for_path(&project_path, cx).ok_or_else(|| {
+                            format!("Source path {} was not found in the project.", input.source_path)
+                        })?;
+                        project.absolute_path(&project_path, cx).ok_or_else(|| {
+                            format!("Source path {} could not be resolved.", input.source_path)
+                        })
+                    })?
+                };
+
+                let destination_path = if let Some(global_destination_path) = global_destination_path
+                {
+                    global_destination_path
+                } else {
+                    project.read_with(cx, |project, cx| {
+                        let project_path = project.find_project_path(&input.destination_path, cx).ok_or_else(|| {
+                            format!(
+                                "Destination path {} was outside the project.",
+                                input.destination_path
+                            )
+                        })?;
+                        project.absolute_path(&project_path, cx).ok_or_else(|| {
+                            format!(
+                                "Destination path {} could not be resolved.",
+                                input.destination_path
+                            )
+                        })
+                    })?
+                };
+
+                futures::select! {
+                    result = fs::copy_recursive(
+                        fs.as_ref(),
+                        &source_path,
+                        &destination_path,
+                        fs::CopyOptions::default(),
+                    ).fuse() => {
+                        result.map_err(|e| format!("Copying {} to {}: {e}", input.source_path, input.destination_path))?;
+                    }
+                    _ = event_stream.cancelled_by_user().fuse() => {
+                        return Err("Copy cancelled by user".to_string());
+                    }
+                }
+
+                return Ok(format!(
+                    "Copied {} to {}",
+                    input.source_path, input.destination_path
+                ));
+            }
+
             let copy_task = project.update(cx, |project, cx| {
                 match project
                     .find_project_path(&input.source_path, cx)
@@ -222,6 +290,124 @@ mod tests {
         });
     }
 
+    #[gpui::test]
+    async fn test_copy_path_global_skill_directory_to_project(cx: &mut TestAppContext) {
+        init_test(cx);
+
+        let fs = FakeFs::new(cx.executor());
+        fs.insert_tree(path!("/root/project"), json!({})).await;
+        let skill_dir = agent_skills::global_skills_dir().join("my-skill");
+        fs.insert_tree(&skill_dir, json!({ "SKILL.md": "content" }))
+            .await;
+        let project = Project::test(fs.clone(), [path!("/root/project").as_ref()], cx).await;
+        cx.executor().run_until_parked();
+
+        let tool = Arc::new(CopyPathTool::new(project));
+        let input_path = PathBuf::from("~")
+            .join(".agents")
+            .join("skills")
+            .join("my-skill")
+            .to_string_lossy()
+            .into_owned();
+
+        let (event_stream, mut event_rx) = ToolCallEventStream::test();
+        let task = cx.update(|cx| {
+            tool.run(
+                ToolInput::resolved(CopyPathToolInput {
+                    source_path: input_path,
+                    destination_path: path!("/root/project/my-skill").to_string(),
+                }),
+                event_stream,
+                cx,
+            )
+        });
+
+        let auth = event_rx.expect_authorization().await;
+        let title = auth.tool_call.fields.title.as_deref().unwrap_or("");
+        assert!(
+            title.contains("agent skills"),
+            "Authorization title should mention agent skills, got: {title}",
+        );
+        auth.response
+            .send(acp_thread::SelectedPermissionOutcome::new(
+                acp::PermissionOptionId::new("allow"),
+                acp::PermissionOptionKind::AllowOnce,
+            ))
+            .expect("authorization response should send");
+
+        let result = task.await;
+        assert!(result.is_ok(), "should copy after approval: {result:?}");
+        assert!(fs.is_dir(&skill_dir).await);
+        assert_eq!(
+            fs.load(path!("/root/project/my-skill/SKILL.md").as_ref())
+                .await
+                .unwrap(),
+            "content"
+        );
+    }
+
+    #[gpui::test]
+    async fn test_copy_path_project_directory_to_global_skill_directory(cx: &mut TestAppContext) {
+        init_test(cx);
+
+        let fs = FakeFs::new(cx.executor());
+        fs.insert_tree(
+            path!("/root/project"),
+            json!({ "exported-skill": { "SKILL.md": "content" } }),
+        )
+        .await;
+        let skills_dir = agent_skills::global_skills_dir();
+        fs.create_dir(&skills_dir).await.unwrap();
+        let project = Project::test(fs.clone(), [path!("/root/project").as_ref()], cx).await;
+        cx.executor().run_until_parked();
+
+        let tool = Arc::new(CopyPathTool::new(project));
+        let destination_path = PathBuf::from("~")
+            .join(".agents")
+            .join("skills")
+            .join("exported-skill")
+            .to_string_lossy()
+            .into_owned();
+
+        let (event_stream, mut event_rx) = ToolCallEventStream::test();
+        let task = cx.update(|cx| {
+            tool.run(
+                ToolInput::resolved(CopyPathToolInput {
+                    source_path: path!("/root/project/exported-skill").to_string(),
+                    destination_path,
+                }),
+                event_stream,
+                cx,
+            )
+        });
+
+        let auth = event_rx.expect_authorization().await;
+        let title = auth.tool_call.fields.title.as_deref().unwrap_or("");
+        assert!(
+            title.contains("agent skills"),
+            "Authorization title should mention agent skills, got: {title}",
+        );
+        auth.response
+            .send(acp_thread::SelectedPermissionOutcome::new(
+                acp::PermissionOptionId::new("allow"),
+                acp::PermissionOptionKind::AllowOnce,
+            ))
+            .expect("authorization response should send");
+
+        let result = task.await;
+        assert!(result.is_ok(), "should copy after approval: {result:?}");
+        assert!(
+            fs.is_dir(path!("/root/project/exported-skill").as_ref())
+                .await
+        );
+        assert_eq!(
+            fs.load(skills_dir.join("exported-skill").join("SKILL.md").as_ref())
+                .await
+                .unwrap(),
+            "content"
+        );
+    }
+
     #[gpui::test]
     async fn test_copy_path_symlink_escape_source_requests_authorization(cx: &mut TestAppContext) {
         init_test(cx);

crates/agent/src/tools/create_directory_tool.rs

@@ -1,6 +1,6 @@
 use super::tool_permissions::{
     authorize_symlink_access, canonicalize_worktree_roots, detect_symlink_escape,
-    sensitive_settings_kind,
+    resolve_creatable_global_skill_path, sensitive_settings_kind,
 };
 use agent_client_protocol::schema as acp;
 use agent_settings::AgentSettings;
@@ -22,6 +22,7 @@ use std::path::Path;
 /// Creates a new directory at the specified path within the project. Returns confirmation that the directory was created.
 ///
 /// This tool creates a directory and all necessary parent directories. It should be used whenever you need to create new directories within the project.
+/// The only supported path outside the project is `~/.agents/skills` or a descendant, for global agent skills.
 #[derive(Debug, Serialize, Deserialize, JsonSchema)]
 pub struct CreateDirectoryToolInput {
     /// The path of the new directory.
@@ -34,6 +35,10 @@ pub struct CreateDirectoryToolInput {
     ///
     /// You can create a new directory by providing a path of "directory1/new_directory"
     /// </example>
+    ///
+    /// <example>
+    /// To create a global agent skill directory, you may provide a path under `~/.agents/skills`, such as `~/.agents/skills/my-skill`.
+    /// </example>
     pub path: String,
 }
 
@@ -144,6 +149,21 @@ impl AgentTool for CreateDirectoryTool {
                 authorize.await.map_err(|e| e.to_string())?;
             }
 
+            if let Some(global_skill_directory) =
+                resolve_creatable_global_skill_path(Path::new(&input.path), fs.as_ref()).await
+            {
+                futures::select! {
+                    result = fs.create_dir(&global_skill_directory).fuse() => {
+                        result.map_err(|e| format!("Creating directory {destination_path}: {e}"))?;
+                    }
+                    _ = event_stream.cancelled_by_user().fuse() => {
+                        return Err("Create directory cancelled by user".to_string());
+                    }
+                }
+
+                return Ok(format!("Created directory {destination_path}"));
+            }
+
             let create_entry = project.update(cx, |project, cx| {
                 match project.find_project_path(&input.path, cx) {
                     Some(project_path) => Ok(project.create_entry(project_path, true, cx)),
@@ -190,6 +210,96 @@ mod tests {
         });
     }
 
+    #[gpui::test]
+    async fn test_create_directory_allows_global_skill_directory(cx: &mut TestAppContext) {
+        init_test(cx);
+
+        let fs = FakeFs::new(cx.executor());
+        fs.insert_tree(path!("/root/project"), json!({})).await;
+        let project = Project::test(fs.clone(), [path!("/root/project").as_ref()], cx).await;
+        cx.executor().run_until_parked();
+
+        let tool = Arc::new(CreateDirectoryTool::new(project));
+        let input_path = PathBuf::from("~")
+            .join(".agents")
+            .join("skills")
+            .join("my-skill")
+            .to_string_lossy()
+            .into_owned();
+        let created_path = agent_skills::global_skills_dir().join("my-skill");
+
+        let (event_stream, mut event_rx) = ToolCallEventStream::test();
+        let task = cx.update(|cx| {
+            tool.run(
+                ToolInput::resolved(CreateDirectoryToolInput { path: input_path }),
+                event_stream,
+                cx,
+            )
+        });
+
+        let auth = event_rx.expect_authorization().await;
+        let title = auth.tool_call.fields.title.as_deref().unwrap_or("");
+        assert!(
+            title.contains("agent skills"),
+            "Authorization title should mention agent skills, got: {title}",
+        );
+        auth.response
+            .send(acp_thread::SelectedPermissionOutcome::new(
+                acp::PermissionOptionId::new("allow"),
+                acp::PermissionOptionKind::AllowOnce,
+            ))
+            .expect("authorization response should send");
+
+        let result = task.await;
+        assert!(
+            result.is_ok(),
+            "Tool should create global skill directory: {result:?}"
+        );
+        assert!(fs.is_dir(&created_path).await);
+    }
+
+    #[gpui::test]
+    async fn test_create_directory_rejects_other_global_paths(cx: &mut TestAppContext) {
+        init_test(cx);
+
+        let fs = FakeFs::new(cx.executor());
+        fs.insert_tree(path!("/root/project"), json!({})).await;
+        let project = Project::test(fs.clone(), [path!("/root/project").as_ref()], cx).await;
+        cx.executor().run_until_parked();
+
+        let tool = Arc::new(CreateDirectoryTool::new(project));
+        let outside_path = agent_skills::global_skills_dir()
+            .parent()
+            .expect("global skills directory should have a parent")
+            .join("not-skills");
+
+        let (event_stream, mut event_rx) = ToolCallEventStream::test();
+        let result = cx
+            .update(|cx| {
+                tool.run(
+                    ToolInput::resolved(CreateDirectoryToolInput {
+                        path: outside_path.to_string_lossy().into_owned(),
+                    }),
+                    event_stream,
+                    cx,
+                )
+            })
+            .await;
+
+        assert!(
+            result.is_err(),
+            "Tool should reject paths outside the project and global skills directory"
+        );
+        assert!(!fs.is_dir(&outside_path).await);
+        assert!(
+            !matches!(
+                event_rx.try_recv(),
+                Ok(Ok(crate::ThreadEvent::ToolCallAuthorization(_)))
+            ),
+            "Non-skill global path should not emit an agent-skills authorization prompt",
+        );
+    }
+
     #[gpui::test]
     async fn test_create_directory_symlink_escape_requests_authorization(cx: &mut TestAppContext) {
         init_test(cx);

crates/agent/src/tools/delete_path_tool.rs

@@ -1,6 +1,6 @@
 use super::tool_permissions::{
     authorize_symlink_access, canonicalize_worktree_roots, detect_symlink_escape,
-    sensitive_settings_kind,
+    resolve_global_skill_descendant_path, resolves_to_global_skills_dir, sensitive_settings_kind,
 };
 use crate::{
     AgentTool, ToolCallEventStream, ToolInput, ToolPermissionDecision,
@@ -20,6 +20,8 @@ use std::sync::Arc;
 use util::markdown::MarkdownInlineCode;
 
 /// Deletes the file or directory (and the directory's contents, recursively) at the specified path in the project, and returns confirmation of the deletion.
+///
+/// The only supported paths outside the project are descendants of `~/.agents/skills`, for global agent skills.
 #[derive(Debug, Serialize, Deserialize, JsonSchema)]
 pub struct DeletePathToolInput {
     /// The path of the file or directory to delete.
@@ -95,6 +97,16 @@ impl AgentTool for DeletePathTool {
             let fs = project.read_with(cx, |project, _cx| project.fs().clone());
             let canonical_roots = canonicalize_worktree_roots(&project, &fs, cx).await;
 
+            if resolves_to_global_skills_dir(Path::new(&path), fs.as_ref()).await {
+                return Err(
+                    "Cannot delete the global agent skills directory itself. Delete a skill directory or file beneath it instead."
+                        .to_string(),
+                );
+            }
+
+            let global_skill_path =
+                resolve_global_skill_descendant_path(Path::new(&path), fs.as_ref()).await;
+
             let symlink_escape_target = project.read_with(cx, |project, cx| {
                 detect_symlink_escape(project, &path, &canonical_roots, cx)
                     .map(|(_, target)| target)
@@ -147,6 +159,38 @@ impl AgentTool for DeletePathTool {
                 authorize.await.map_err(|e| e.to_string())?;
             }
 
+            if let Some(global_skill_path) = global_skill_path {
+                let metadata = fs
+                    .metadata(&global_skill_path)
+                    .await
+                    .map_err(|e| format!("Deleting {path}: {e}"))?
+                    .ok_or_else(|| format!("Deleting {path}: path not found"))?;
+
+                futures::select! {
+                    result = async {
+                        if metadata.is_dir {
+                            fs.remove_dir(
+                                &global_skill_path,
+                                fs::RemoveOptions {
+                                    recursive: true,
+                                    ..fs::RemoveOptions::default()
+                                },
+                            )
+                            .await
+                        } else {
+                            fs.remove_file(&global_skill_path, fs::RemoveOptions::default()).await
+                        }
+                    }.fuse() => {
+                        result.map_err(|e| format!("Deleting {path}: {e}"))?;
+                    }
+                    _ = event_stream.cancelled_by_user().fuse() => {
+                        return Err("Delete cancelled by user".to_string());
+                    }
+                }
+
+                return Ok(format!("Deleted {path}"));
+            }
+
             let (project_path, worktree_snapshot) = project.read_with(cx, |project, cx| {
                 let project_path = project.find_project_path(&path, cx).ok_or_else(|| {
                     format!("Couldn't delete {path} because that path isn't in this project.")
@@ -248,6 +292,145 @@ mod tests {
         });
     }
 
+    #[gpui::test]
+    async fn test_delete_path_global_skill_directory(cx: &mut TestAppContext) {
+        init_test(cx);
+
+        let fs = FakeFs::new(cx.executor());
+        fs.insert_tree(path!("/root/project"), json!({})).await;
+        let skills_dir = agent_skills::global_skills_dir();
+        let skill_dir = skills_dir.join("my-skill");
+        fs.insert_tree(&skill_dir, json!({ "SKILL.md": "content" }))
+            .await;
+        let project = Project::test(fs.clone(), [path!("/root/project").as_ref()], cx).await;
+        cx.executor().run_until_parked();
+
+        let action_log = cx.new(|_| ActionLog::new(project.clone()));
+        let tool = Arc::new(DeletePathTool::new(project, action_log));
+        let input_path = PathBuf::from("~")
+            .join(".agents")
+            .join("skills")
+            .join("my-skill")
+            .to_string_lossy()
+            .into_owned();
+
+        let (event_stream, mut event_rx) = ToolCallEventStream::test();
+        let task = cx.update(|cx| {
+            tool.run(
+                ToolInput::resolved(DeletePathToolInput { path: input_path }),
+                event_stream,
+                cx,
+            )
+        });
+
+        let auth = event_rx.expect_authorization().await;
+        let title = auth.tool_call.fields.title.as_deref().unwrap_or("");
+        assert!(
+            title.contains("agent skills"),
+            "Authorization title should mention agent skills, got: {title}",
+        );
+        auth.response
+            .send(acp_thread::SelectedPermissionOutcome::new(
+                acp::PermissionOptionId::new("allow"),
+                acp::PermissionOptionKind::AllowOnce,
+            ))
+            .expect("authorization response should send");
+
+        let result = task.await;
+        assert!(result.is_ok(), "should delete after approval: {result:?}");
+        assert!(fs.is_dir(&skills_dir).await);
+        assert!(!fs.is_dir(&skill_dir).await);
+    }
+
+    #[gpui::test]
+    async fn test_delete_path_global_skill_file(cx: &mut TestAppContext) {
+        init_test(cx);
+
+        let fs = FakeFs::new(cx.executor());
+        fs.insert_tree(path!("/root/project"), json!({})).await;
+        let skill_file = agent_skills::global_skills_dir()
+            .join("my-skill")
+            .join("references")
+            .join("notes.md");
+        fs.create_dir(skill_file.parent().unwrap()).await.unwrap();
+        fs.insert_file(&skill_file, b"notes".to_vec()).await;
+        let project = Project::test(fs.clone(), [path!("/root/project").as_ref()], cx).await;
+        cx.executor().run_until_parked();
+
+        let action_log = cx.new(|_| ActionLog::new(project.clone()));
+        let tool = Arc::new(DeletePathTool::new(project, action_log));
+        let input_path = PathBuf::from("~")
+            .join(".agents")
+            .join("skills")
+            .join("my-skill")
+            .join("references")
+            .join("notes.md")
+            .to_string_lossy()
+            .into_owned();
+
+        let (event_stream, mut event_rx) = ToolCallEventStream::test();
+        let task = cx.update(|cx| {
+            tool.run(
+                ToolInput::resolved(DeletePathToolInput { path: input_path }),
+                event_stream,
+                cx,
+            )
+        });
+
+        let auth = event_rx.expect_authorization().await;
+        auth.response
+            .send(acp_thread::SelectedPermissionOutcome::new(
+                acp::PermissionOptionId::new("allow"),
+                acp::PermissionOptionKind::AllowOnce,
+            ))
+            .expect("authorization response should send");
+
+        let result = task.await;
+        assert!(result.is_ok(), "should delete after approval: {result:?}");
+        assert!(!fs.is_file(&skill_file).await);
+    }
+
+    #[gpui::test]
+    async fn test_delete_path_rejects_global_skills_root(cx: &mut TestAppContext) {
+        init_test(cx);
+
+        let fs = FakeFs::new(cx.executor());
+        fs.insert_tree(path!("/root/project"), json!({})).await;
+        let skills_dir = agent_skills::global_skills_dir();
+        fs.create_dir(&skills_dir).await.unwrap();
+        let project = Project::test(fs.clone(), [path!("/root/project").as_ref()], cx).await;
+        cx.executor().run_until_parked();
+
+        let action_log = cx.new(|_| ActionLog::new(project.clone()));
+        let tool = Arc::new(DeletePathTool::new(project, action_log));
+        let input_path = PathBuf::from("~")
+            .join(".agents")
+            .join("skills")
+            .to_string_lossy()
+            .into_owned();
+
+        let (event_stream, mut event_rx) = ToolCallEventStream::test();
+        let result = cx
+            .update(|cx| {
+                tool.run(
+                    ToolInput::resolved(DeletePathToolInput { path: input_path }),
+                    event_stream,
+                    cx,
+                )
+            })
+            .await;
+
+        assert!(result.is_err(), "should reject deleting skills root");
+        assert!(fs.is_dir(&skills_dir).await);
+        assert!(
+            !matches!(
+                event_rx.try_recv(),
+                Ok(Ok(crate::ThreadEvent::ToolCallAuthorization(_)))
+            ),
+            "Deleting the skills root should fail before requesting authorization",
+        );
+    }
+
     #[gpui::test]
     async fn test_delete_path_symlink_escape_requests_authorization(cx: &mut TestAppContext) {
         init_test(cx);

crates/agent/src/tools/diagnostics_tool.rs

@@ -1,16 +1,18 @@
 use crate::{AgentTool, ToolCallEventStream, ToolInput};
 use agent_client_protocol::schema as acp;
-use anyhow::Result;
-use futures::FutureExt as _;
-use gpui::{App, Entity, Task};
+use futures::{Future, FutureExt as _};
+use gpui::{App, AsyncApp, Entity, Task};
 use language::{DiagnosticSeverity, OffsetRangeExt};
 use project::Project;
 use schemars::JsonSchema;
 use serde::{Deserialize, Serialize};
+use std::path::Path;
 use std::{fmt::Write, sync::Arc};
 use ui::SharedString;
 use util::markdown::MarkdownInlineCode;
 
+type Result<T, E = String> = core::result::Result<T, E>;
+
 /// Get errors and warnings for the project or a specific file.
 ///
 /// This tool can be invoked after a series of edits to determine if further edits are necessary, or if the user asks to fix errors or warnings in their codebase.
@@ -18,6 +20,11 @@ use util::markdown::MarkdownInlineCode;
 /// When a path is provided, shows all diagnostics for that specific file.
 /// When no path is provided, shows a summary of error and warning counts for all files in the project.
 ///
+/// This tool attempts to refresh diagnostics before returning.
+/// If refreshing diagnostics fails (for example, if the language server does not support pull-based diagnostics), it will return any diagnostics already present.
+/// Note that, in this case, the results may be out-of-date, and may or may not reflect the most recent edits.
+/// If this happens, do not attempt to re-run this tool in the hope that refreshing will later succeed. Failures are typically persistent.
+///
 /// <example>
 /// To get diagnostics for a specific file:
 /// {
@@ -60,6 +67,71 @@ impl DiagnosticsTool {
     }
 }
 
+async fn with_cancellation<T>(f: impl Future<Output = T>, s: &ToolCallEventStream) -> Result<T> {
+    futures::select! {
+        result = f.fuse() => Ok(result),
+        _ = s.cancelled_by_user().fuse() => {
+            Err("Diagnostics cancelled by user".to_string())
+        }
+    }
+}
+
+fn freshness_message(refreshed: bool) -> &'static str {
+    if refreshed {
+        "Diagnostics successfully refreshed."
+    } else {
+        "Failed to refresh diagnostics. Diagnostics may be stale."
+    }
+}
+
+/// Attempt to pull fresh diagnostics from the LSP before reading them.
+///
+/// Returns `Ok(true)` if diagnostics were successfully refreshed,
+/// `Ok(false)` if the pull failed (callers should fall through to
+/// read cached diagnostics), or `Err` if cancelled by the user.
+async fn pull_diagnostics(
+    project: &Entity<Project>,
+    path: Option<&Path>,
+    event_stream: &ToolCallEventStream,
+    cx: &mut AsyncApp,
+) -> Result<bool, String> {
+    match path {
+        Some(path) => {
+            let open_buffer_task = project.update(cx, |project, cx| {
+                let Some(project_path) = project.find_project_path(path, cx) else {
+                    return Err(format!("Could not find path {} in project", path.display()));
+                };
+                Ok(project.open_buffer(project_path, cx))
+            })?;
+
+            let buffer = with_cancellation(open_buffer_task, event_stream)
+                .await?
+                .map_err(|e| e.to_string())?;
+
+            let lsp_store = project.read_with(cx, |project, _cx| project.lsp_store());
+            let pull_task = lsp_store.update(cx, |lsp_store, cx| {
+                lsp_store.pull_diagnostics_for_buffer(buffer, cx)
+            });
+            let pull_result = with_cancellation(pull_task, event_stream).await?;
+            if let Err(error) = &pull_result {
+                log::warn!("Failed to pull diagnostics, using cached: {error:#}");
+            }
+            Ok(pull_result.is_ok())
+        }
+        None => {
+            let lsp_store = project.read_with(cx, |project, _cx| project.lsp_store());
+            let pull_task = lsp_store.update(cx, |lsp_store, cx| {
+                lsp_store.pull_workspace_diagnostics_once(cx)
+            });
+            let succeeded = with_cancellation(pull_task, event_stream).await?;
+            if !succeeded {
+                log::warn!("Failed to pull workspace diagnostics, using cached");
+            }
+            Ok(succeeded)
+        }
+    }
+}
+
 impl AgentTool for DiagnosticsTool {
     type Input = DiagnosticsToolInput;
     type Output = String;
@@ -96,21 +168,22 @@ impl AgentTool for DiagnosticsTool {
             let input = input.recv().await.map_err(|e| e.to_string())?;
 
             match input.path {
-                Some(path) if !path.is_empty() => {
-                    let (_project_path, open_buffer_task) = project.update(cx, |project, cx| {
-                        let Some(project_path) = project.find_project_path(&path, cx) else {
+                Some(ref path) if !path.is_empty() => {
+                    let refreshed =
+                        pull_diagnostics(&project, Some(Path::new(path)), &event_stream, cx)
+                            .await?;
+
+                    let open_buffer_task = project.update(cx, |project, cx| {
+                        let Some(project_path) = project.find_project_path(path, cx) else {
                             return Err(format!("Could not find path {path} in project"));
                         };
-                        let task = project.open_buffer(project_path.clone(), cx);
-                        Ok((project_path, task))
+                        Ok(project.open_buffer(project_path, cx))
                     })?;
 
-                    let buffer = futures::select! {
-                        result = open_buffer_task.fuse() => result.map_err(|e| e.to_string())?,
-                        _ = event_stream.cancelled_by_user().fuse() => {
-                            return Err("Diagnostics cancelled by user".to_string());
-                        }
-                    };
+                    let buffer = with_cancellation(open_buffer_task, &event_stream)
+                        .await?
+                        .map_err(|e| e.to_string())?;
+
                     let mut output = String::new();
                     let snapshot = buffer.read_with(cx, |buffer, _cx| buffer.snapshot());
 
@@ -133,13 +206,18 @@ impl AgentTool for DiagnosticsTool {
                         .ok();
                     }
 
+                    let freshness = freshness_message(refreshed);
                     if output.is_empty() {
-                        Ok("File doesn't have errors or warnings!".to_string())
+                        Ok(format!(
+                            "{freshness}\n\nFile doesn't have errors or warnings!"
+                        ))
                     } else {
-                        Ok(output)
+                        Ok(format!("{freshness}\n\n{output}"))
                     }
                 }
                 _ => {
+                    let refreshed = pull_diagnostics(&project, None, &event_stream, cx).await?;
+
                     let (output, has_diagnostics) = project.read_with(cx, |project, cx| {
                         let mut output = String::new();
                         let mut has_diagnostics = false;
@@ -165,10 +243,13 @@ impl AgentTool for DiagnosticsTool {
                         (output, has_diagnostics)
                     });
 
+                    let freshness = freshness_message(refreshed);
                     if has_diagnostics {
-                        Ok(output)
+                        Ok(format!("{freshness}\n\n{output}"))
                     } else {
-                        Ok("No errors or warnings found in the project.".into())
+                        Ok(format!(
+                            "{freshness}\n\nNo errors or warnings found in the project."
+                        ))
                     }
                 }
             }

crates/agent/src/tools/edit_file_tool.rs

@@ -23,13 +23,21 @@ const DEFAULT_UI_TEXT: &str = "Editing file";
 
 /// This is a tool for applying edits to an existing file.
 ///
-/// Before using this tool, use the `read_file` tool to understand the file's contents and context
+/// Before using this tool, use the `read_file` tool to understand the file's contents and context.
 /// To create a new file or overwrite an existing one with completely new contents, use the `write_file` tool instead.
+///
+/// The only supported path outside the project is `~/.agents/skills` or a descendant, for global agent skills.
+///
+/// `read_file` prefixes each line of its output with a line number right-aligned in a
+/// 6-character field followed by a single tab, then the line's actual content. When you
+/// derive `old_text` or `new_text` from that output, strip this prefix and keep only what
+/// comes after the tab, preserving the original indentation (tabs and spaces) exactly.
+/// Never include any part of the line number prefix in `old_text` or `new_text`.
 #[derive(Clone, Debug, Serialize, Deserialize, JsonSchema)]
 pub struct EditFileToolInput {
     /// The full path of the file to edit in the project.
     ///
-    /// WARNING: When specifying which file path need changing, you MUST start each path with one of the project's root directories.
+    /// WARNING: When specifying which file path need changing, you MUST start each path with one of the project's root directories, unless it's a global agent skill under `~/.agents/skills`.
     ///
     /// The following examples assume we have two root directories in the project:
     /// - /a/b/backend
@@ -44,6 +52,10 @@ pub struct EditFileToolInput {
     /// <example>
     /// `frontend/db.js`
     /// </example>
+    ///
+    /// <example>
+    /// To edit a global agent skill file, you may provide a path under `~/.agents/skills`, such as `~/.agents/skills/my-skill/SKILL.md`.
+    /// </example>
     pub path: PathBuf,
 
     /// List of edit operations to apply sequentially.
@@ -253,6 +265,7 @@ impl AgentTool for EditFileTool {
             run_session(
                 self.process_streaming_edits(&mut input, &event_stream, cx)
                     .await,
+                &event_stream,
                 cx,
             )
             .await
@@ -457,6 +470,63 @@ mod tests {
         assert_eq!(input_path, None);
     }
 
+    #[gpui::test]
+    async fn test_streaming_edit_global_skill_file(cx: &mut TestAppContext) {
+        init_test(cx);
+
+        let fs = project::FakeFs::new(cx.executor());
+        fs.insert_tree(path!("/root"), json!({})).await;
+        let skill_dir = agent_skills::global_skills_dir().join("my-skill");
+        fs.insert_tree(&skill_dir, json!({ "SKILL.md": "old content\n" }))
+            .await;
+        let (edit_tool, _project, _action_log, fs, _thread) =
+            setup_test_with_fs(cx, fs, &[path!("/root").as_ref()]).await;
+
+        let input_path = PathBuf::from("~")
+            .join(".agents")
+            .join("skills")
+            .join("my-skill")
+            .join("SKILL.md");
+        let skill_file = agent_skills::global_skills_dir()
+            .join("my-skill")
+            .join("SKILL.md");
+
+        let (event_stream, mut event_rx) = ToolCallEventStream::test();
+        let task = cx.update(|cx| {
+            edit_tool.clone().run(
+                ToolInput::resolved(EditFileToolInput {
+                    path: input_path,
+                    edits: vec![Edit {
+                        old_text: "old content".into(),
+                        new_text: "new content".into(),
+                    }],
+                }),
+                event_stream,
+                cx,
+            )
+        });
+
+        event_rx.expect_update_fields().await;
+        let auth = event_rx.expect_authorization().await;
+        let title = auth.tool_call.fields.title.as_deref().unwrap_or("");
+        assert!(
+            title.contains("agent skills"),
+            "Authorization title should mention agent skills, got: {title}",
+        );
+        auth.response
+            .send(acp_thread::SelectedPermissionOutcome::new(
+                acp::PermissionOptionId::new("allow"),
+                acp::PermissionOptionKind::AllowOnce,
+            ))
+            .expect("authorization response should send");
+
+        let EditFileToolOutput::Success { new_text, .. } = task.await.unwrap() else {
+            panic!("expected success");
+        };
+        assert_eq!(new_text, "new content\n");
+        assert_eq!(fs.load(&skill_file).await.unwrap(), "new content\n");
+    }
+
     #[gpui::test]
     async fn test_streaming_edit_failed_match(cx: &mut TestAppContext) {
         let (edit_tool, _project, _action_log, _fs, _thread) =
@@ -486,6 +556,69 @@ mod tests {
         );
     }
 
+    /// When the edit fails after a session is created but before any edits are
+    /// actually applied (e.g., the first `old_text` doesn't match), the empty
+    /// diff placeholder in the UI should be replaced with the error message.
+    #[gpui::test]
+    async fn test_streaming_edit_surfaces_error_when_no_edits_applied(cx: &mut TestAppContext) {
+        async fn find_first_text_content_in_events(
+            receiver: &mut crate::ToolCallEventStreamReceiver,
+        ) -> Option<String> {
+            use futures::StreamExt as _;
+            while let Some(event) = receiver.next().await {
+                let Ok(crate::ThreadEvent::ToolCallUpdate(
+                    acp_thread::ToolCallUpdate::UpdateFields(update),
+                )) = event
+                else {
+                    continue;
+                };
+                let Some(content) = update.fields.content else {
+                    continue;
+                };
+                for item in content {
+                    if let acp::ToolCallContent::Content(c) = item
+                        && let acp::ContentBlock::Text(text) = c.content
+                    {
+                        return Some(text.text);
+                    }
+                }
+            }
+            None
+        }
+
+        let (edit_tool, _project, _action_log, _fs, _thread) =
+            setup_test(cx, json!({"file.txt": "hello world"})).await;
+        let (event_stream, mut receiver) = ToolCallEventStream::test();
+        let task = cx.update(|cx| {
+            edit_tool.clone().run(
+                ToolInput::resolved(EditFileToolInput {
+                    path: "root/file.txt".into(),
+                    edits: vec![Edit {
+                        old_text: "nonexistent text that is not in the file".into(),
+                        new_text: "replacement".into(),
+                    }],
+                }),
+                event_stream,
+                cx,
+            )
+        });
+
+        let EditFileToolOutput::Error { error, diff, .. } = task.await.unwrap_err() else {
+            panic!("expected error");
+        };
+        assert!(
+            diff.is_empty(),
+            "sanity check: no edits should have been applied",
+        );
+
+        let content_text = find_first_text_content_in_events(&mut receiver).await;
+        assert_eq!(
+            content_text.as_deref(),
+            Some(error.as_str()),
+            "expected the failure message to be surfaced as tool call content",
+        );
+    }
+
     #[gpui::test]
     async fn test_streaming_early_buffer_open(cx: &mut TestAppContext) {
         let (edit_tool, _project, _action_log, _fs, _thread) =
@@ -2475,7 +2608,8 @@ mod tests {
 
         cx.run_until_parked();
 
-        let changed = action_log.read_with(cx, |log, cx| log.changed_buffers(cx));
+        let changed =
+            action_log.read_with(cx, |log, cx| log.changed_buffers(cx).collect::<Vec<_>>());
         assert!(
             !changed.is_empty(),
             "action_log.changed_buffers() should be non-empty after streaming edit,

crates/agent/src/tools/edit_session.rs

@@ -2,6 +2,7 @@ mod reindent;
 mod streaming_fuzzy_matcher;
 mod streaming_parser;
 
+use super::tool_permissions::resolve_creatable_global_skill_path;
 use crate::{Thread, ToolCallEventStream};
 use acp_thread::Diff;
 use action_log::ActionLog;
@@ -11,7 +12,7 @@ use collections::HashSet;
 use futures::{FutureExt, channel::oneshot};
 use gpui::{App, AppContext, AsyncApp, Entity, Task, WeakEntity};
 use language::language_settings::{self, FormatOnSave};
-use language::{Buffer, BufferEvent, LanguageRegistry};
+use language::{Buffer, BufferEditSource, BufferEvent, LanguageRegistry};
 use language_model::LanguageModelToolResultContent;
 use project::lsp_store::{FormatTrigger, LspFormatTarget};
 use project::{AgentLocation, Project, ProjectPath};
@@ -277,6 +278,7 @@ pub(crate) enum EditSessionResult {
 
 pub(crate) async fn run_session(
     result: EditSessionResult,
+    event_stream: &ToolCallEventStream,
     cx: &mut AsyncApp,
 ) -> Result<EditSessionOutput, EditSessionOutput> {
     match result {
@@ -302,6 +304,11 @@ pub(crate) async fn run_session(
                 .ensure_buffer_saved(&session.buffer, cx)
                 .await;
             let (_new_text, diff) = session.compute_new_text_and_diff(cx).await;
+            if diff.is_empty() {
+                event_stream.update_fields(acp::ToolCallUpdateFields::new().content(vec![
+                    acp::ToolCallContent::Content(acp::Content::new(error.clone())),
+                ]));
+            }
             Err(EditSessionOutput::Error {
                 error,
                 input_path: Some(session.input_path),
@@ -311,11 +318,16 @@ pub(crate) async fn run_session(
         EditSessionResult::Failed {
             error,
             session: None,
-        } => Err(EditSessionOutput::Error {
-            error,
-            input_path: None,
-            diff: String::new(),
-        }),
+        } => {
+            event_stream.update_fields(acp::ToolCallUpdateFields::new().content(vec![
+                acp::ToolCallContent::Content(acp::Content::new(error.clone())),
+            ]));
+            Err(EditSessionOutput::Error {
+                error,
+                input_path: None,
+                diff: String::new(),
+            })
+        }
     }
 }
 
@@ -352,6 +364,16 @@ pub(crate) struct EditSession {
     _finalize_diff_guard: Deferred<Box<dyn FnOnce()>>,
 }
 
+/// The destination of an edit session, identified by its absolute path on
+/// disk. `project_path` is `Some` for files that live inside one of the
+/// project's worktrees (i.e. that the standard project-path machinery can
+/// resolve), and `None` for global skill files reached through the
+/// `~/.agents/skills` allowlist.
+struct EditSessionTarget {
+    abs_path: PathBuf,
+    project_path: Option<ProjectPath>,
+}
+
 enum Pipeline {
     Write(WritePipeline),
     Edit(EditPipeline),
@@ -598,21 +620,14 @@ impl EditPipeline {
 
                 log::debug!("new_text_chunk: done=true, final_text='{}'", final_text);
 
-                if !final_text.is_empty() {
-                    let char_ops = streaming_diff.push_new(&final_text);
-                    apply_char_operations(
-                        &char_ops,
-                        buffer,
-                        &original_snapshot,
-                        &mut edit_cursor,
-                        &context.action_log,
-                        cx,
-                    );
-                }
-
-                let remaining_ops = streaming_diff.finish();
+                let mut char_ops = if final_text.is_empty() {
+                    Vec::new()
+                } else {
+                    streaming_diff.push_new(&final_text)
+                };
+                char_ops.extend(streaming_diff.finish());
                 apply_char_operations(
-                    &remaining_ops,
+                    &char_ops,
                     buffer,
                     &original_snapshot,
                     &mut edit_cursor,
@@ -639,16 +654,34 @@ impl EditSession {
         event_stream: &ToolCallEventStream,
         cx: &mut AsyncApp,
     ) -> Result<Self, String> {
-        let project_path = cx.update(|cx| resolve_path(mode, &path, &context.project, cx))?;
+        let target = if let Some(abs_path) =
+            resolve_global_skill_path_for_edit_session(mode, &path, &context, cx).await?
+        {
+            EditSessionTarget {
+                abs_path,
+                project_path: None,
+            }
+        } else {
+            let project_path = cx.update(|cx| resolve_path(mode, &path, &context.project, cx))?;
 
-        let Some(abs_path) =
-            cx.update(|cx| context.project.read(cx).absolute_path(&project_path, cx))
-        else {
-            return Err(format!(
-                "Worktree at '{}' does not exist",
-                path.to_string_lossy()
-            ));
+            let Some(abs_path) =
+                cx.update(|cx| context.project.read(cx).absolute_path(&project_path, cx))
+            else {
+                return Err(format!(
+                    "Worktree at '{}' does not exist",
+                    path.to_string_lossy()
+                ));
+            };
+
+            EditSessionTarget {
+                abs_path,
+                project_path: Some(project_path),
+            }
         };
+        let EditSessionTarget {
+            abs_path,
+            project_path,
+        } = target;
 
         event_stream.update_fields(
             ToolCallUpdateFields::new().locations(vec![ToolCallLocation::new(abs_path.clone())]),
@@ -658,11 +691,20 @@ impl EditSession {
             .await
             .map_err(|e| e.to_string())?;
 
-        let buffer = context
-            .project
-            .update(cx, |project, cx| project.open_buffer(project_path, cx))
-            .await
-            .map_err(|e| e.to_string())?;
+        let buffer = match project_path {
+            Some(project_path) => context
+                .project
+                .update(cx, |project, cx| project.open_buffer(project_path, cx))
+                .await
+                .map_err(|e| e.to_string())?,
+            None => context
+                .project
+                .update(cx, |project, cx| {
+                    project.open_local_buffer(abs_path.clone(), cx)
+                })
+                .await
+                .map_err(|e| e.to_string())?,
+        };
 
         let file_changed_since_last_read =
             ensure_buffer_saved(&buffer, &abs_path, mode, &context, event_stream, cx).await?;
@@ -853,16 +895,17 @@ fn apply_char_operations(
     action_log: &Entity<ActionLog>,
     cx: &mut AsyncApp,
 ) {
+    let mut edits: Vec<_> = Vec::new();
     for op in ops {
         match op {
             CharOperation::Insert { text } => {
                 let anchor = snapshot.anchor_after(*edit_cursor);
-                agent_edit_buffer(&buffer, [(anchor..anchor, text.as_str())], action_log, cx);
+                edits.push((anchor..anchor, text.as_str().into()));
             }
             CharOperation::Delete { bytes } => {
                 let delete_end = *edit_cursor + bytes;
                 let anchor_range = snapshot.anchor_range_inside(*edit_cursor..delete_end);
-                agent_edit_buffer(&buffer, [(anchor_range, "")], action_log, cx);
+                edits.push((anchor_range, Arc::<str>::from("")));
                 *edit_cursor = delete_end;
             }
             CharOperation::Keep { bytes } => {
@@ -870,6 +913,9 @@ fn apply_char_operations(
             }
         }
     }
+    if !edits.is_empty() {
+        agent_edit_buffer(buffer, edits, action_log, cx);
+    }
 }
 
 fn extract_match(
@@ -926,7 +972,9 @@ fn agent_edit_buffer<I, S, T>(
 {
     cx.update(|cx| {
         buffer.update(cx, |buffer, cx| {
+            buffer.start_transaction();
             buffer.edit(edits, None, cx);
+            buffer.end_transaction_with_source(BufferEditSource::Agent, cx);
         });
         action_log.update(cx, |log, cx| log.buffer_edited(buffer.clone(), cx));
     });
@@ -1055,6 +1103,72 @@ async fn resolve_dirty_buffer(
     Ok(())
 }
 
+/// Mirrors [`resolve_path`]'s pre-auth validation for the global-skill
+/// branch: returns `Ok(Some(abs_path))` if the path lives under
+/// `~/.agents/skills` and is in a valid state for the requested mode,
+/// `Ok(None)` if the path isn't a global skill at all (so the caller should
+/// fall through to project-path resolution), or `Err(message)` if the path
+/// is a global skill but can't be used (missing in Edit mode, parent
+/// missing in Write mode, etc.).
+///
+/// Errors returned from here surface to the model as tool-result errors
+/// without prompting the user — same contract as [`resolve_path`]. The
+/// idea is that "file doesn't exist" or "parent isn't a directory" are
+/// model mistakes, not decisions the user should be asked to approve.
+async fn resolve_global_skill_path_for_edit_session(
+    mode: EditSessionMode,
+    path: &PathBuf,
+    context: &EditSessionContext,
+    cx: &mut AsyncApp,
+) -> Result<Option<PathBuf>, String> {
+    let fs = context
+        .project
+        .read_with(cx, |project, _cx| project.fs().clone());
+    let Some(abs_path) = resolve_creatable_global_skill_path(path, fs.as_ref()).await else {
+        return Ok(None);
+    };
+
+    match mode {
+        EditSessionMode::Edit => {
+            let metadata = fs
+                .metadata(&abs_path)
+                .await
+                .map_err(|e| format!("Can't edit file: {e}"))?
+                .ok_or_else(|| "Can't edit file: path not found".to_string())?;
+            if metadata.is_dir {
+                return Err("Can't edit file: path is a directory".to_string());
+            }
+        }
+        EditSessionMode::Write => {
+            if let Some(metadata) = fs
+                .metadata(&abs_path)
+                .await
+                .map_err(|e| format!("Can't write to file: {e}"))?
+            {
+                if metadata.is_dir {
+                    return Err("Can't write to file: path is a directory".to_string());
+                }
+            } else {
+                let parent_path = abs_path
+                    .parent()
+                    .ok_or_else(|| "Can't create file: incorrect path".to_string())?;
+                let parent_metadata = fs
+                    .metadata(parent_path)
+                    .await
+                    .map_err(|e| format!("Can't create file: {e}"))?
+                    .ok_or_else(|| {
+                        "Can't create file: parent directory doesn't exist".to_string()
+                    })?;
+                if !parent_metadata.is_dir {
+                    return Err("Can't create file: parent is not a directory".to_string());
+                }
+            }
+        }
+    }
+
+    Ok(Some(abs_path))
+}
+
 fn resolve_path(
     mode: EditSessionMode,
     path: &PathBuf,

crates/agent/src/tools/edit_session/streaming_parser.rs

@@ -113,7 +113,7 @@ impl StreamingParser {
             {
                 if partial.new_text.is_some() && !state.buffer_new_text_until_old_text_done {
                     // new_text appeared after old_text, so old_text is done — emit everything.
-                    let start = state.old_text_emitted_len.min(old_text.len());
+                    let start = find_char_boundary(old_text, state.old_text_emitted_len);
                     let chunk = normalize_done_chunk(old_text[start..].to_string());
                     state.old_text_done = true;
                     state.old_text_emitted_len = old_text.len();
@@ -124,9 +124,10 @@ impl StreamingParser {
                     });
                 } else {
                     let safe_end = safe_emit_end_for_edit_text(old_text);
+                    let safe_start = find_char_boundary(old_text, state.old_text_emitted_len);
 
-                    if safe_end > state.old_text_emitted_len {
-                        let chunk = old_text[state.old_text_emitted_len..safe_end].to_string();
+                    if safe_end > safe_start {
+                        let chunk = old_text[safe_start..safe_end].to_string();
                         state.old_text_emitted_len = safe_end;
                         events.push(EditEvent::OldTextChunk {
                             edit_index: index,
@@ -143,9 +144,10 @@ impl StreamingParser {
                 && !state.new_text_done
             {
                 let safe_end = safe_emit_end_for_edit_text(new_text);
+                let safe_start = find_char_boundary(new_text, state.new_text_emitted_len);
 
-                if safe_end > state.new_text_emitted_len {
-                    let chunk = new_text[state.new_text_emitted_len..safe_end].to_string();
+                if safe_end > safe_start {
+                    let chunk = new_text[safe_start..safe_end].to_string();
                     state.new_text_emitted_len = safe_end;
                     events.push(EditEvent::NewTextChunk {
                         edit_index: index,
@@ -343,8 +345,10 @@ impl StreamingParser {
 /// held back because it may be an artifact of the partial JSON fixer closing
 /// an incomplete escape sequence (e.g. turning a half-received `\n` into `\\`).
 /// The next partial will reveal the correct character.
+///
+/// The returned position is always a valid UTF-8 character boundary.
 fn safe_emit_end(text: &str) -> usize {
-    if text.as_bytes().last() == Some(&b'\\') {
+    if text.ends_with('\\') {
         text.len() - 1
     } else {
         text.len()
@@ -353,13 +357,35 @@ fn safe_emit_end(text: &str) -> usize {
 
 fn safe_emit_end_for_edit_text(text: &str) -> usize {
     let safe_end = safe_emit_end(text);
-    if safe_end > 0 && text.as_bytes()[safe_end - 1] == b'\n' {
+    // Use string slicing to check the last character, ensuring we respect UTF-8 boundaries.
+    if safe_end > 0 && text[..safe_end].ends_with('\n') {
         safe_end - 1
     } else {
         safe_end
     }
 }
 
+/// Finds a valid UTF-8 character boundary at or before the target position.
+///
+/// When streaming partial JSON, the text structure can change between updates
+/// (e.g., an escape sequence being completed). This means a byte position that
+/// was valid in one partial may land inside a multi-byte character in the next.
+/// This function finds the nearest valid boundary at or before the target.
+fn find_char_boundary(text: &str, target: usize) -> usize {
+    if target >= text.len() {
+        return text.len();
+    }
+    if text.is_char_boundary(target) {
+        return target;
+    }
+    // Walk backwards to find a valid boundary.
+    let mut pos = target;
+    while pos > 0 && !text.is_char_boundary(pos) {
+        pos -= 1;
+    }
+    pos
+}
+
 fn normalize_done_chunk(mut chunk: String) -> String {
     if chunk.ends_with('\n') {
         chunk.pop();
@@ -1146,4 +1172,77 @@ mod tests {
             }]
         );
     }
+
+    #[test]
+    fn test_multibyte_char_with_trailing_backslash() {
+        // Reproduces a panic where the stored `old_text_emitted_len` from a previous
+        // partial lands inside a multi-byte UTF-8 character in the current partial.
+        //
+        // Scenario: The JSON fixer produces a literal backslash when the stream cuts
+        // mid-escape. If the *next* partial replaces that backslash with a multi-byte
+        // character (e.g., em-dash '—'), the stored byte position is no longer valid.
+        let mut parser = StreamingParser::default();
+
+        // First partial: text ends with backslash (held back by safe_emit_end).
+        // "abc" = 3 bytes, backslash held back, so emitted_len = 3.
+        let events = parser.push_edits(&[PartialEdit {
+            old_text: Some("abc\\".into()),
+            new_text: None,
+        }]);
+        assert_eq!(
+            events.as_slice(),
+            &[EditEvent::OldTextChunk {
+                edit_index: 0,
+                chunk: "abc".into(),
+                done: false,
+            }]
+        );
+
+        // Second partial: the backslash is replaced by em-dash '—' (3 bytes: E2 80 94).
+        // "ab—" = 2 + 3 = 5 bytes total, with em-dash at bytes 2..5.
+        // The stored emitted_len (3) is inside the em-dash!
+        // This should NOT panic.
+        let events = parser.push_edits(&[PartialEdit {
+            old_text: Some("ab—".into()),
+            new_text: None,
+        }]);
+        // The parser should handle this gracefully.
+        let _ = events;
+    }
+
+    #[test]
+    fn test_emitted_len_inside_multibyte_char_boundary() {
+        // More direct reproduction: emitted_len points inside a multi-byte character.
+        //
+        // This can happen when:
+        // 1. First partial has text where byte N is a valid boundary
+        // 2. Second partial has *different* text where byte N is inside a multi-byte char
+        let mut parser = StreamingParser::default();
+
+        // First partial: "ab" (2 bytes), backslash held back.
+        // After processing: emitted_len = 2
+        let events = parser.push_edits(&[PartialEdit {
+            old_text: Some("ab\\".into()),
+            new_text: None,
+        }]);
+        assert_eq!(
+            events.as_slice(),
+            &[EditEvent::OldTextChunk {
+                edit_index: 0,
+                chunk: "ab".into(),
+                done: false,
+            }]
+        );
+
+        // Second partial: "a—" where em-dash starts at byte 1 and spans bytes 1-3.
+        // Stored emitted_len = 2, but byte 2 is inside the em-dash!
+        // This should NOT panic.
+        let events = parser.push_edits(&[PartialEdit {
+            old_text: Some("a—".into()),
+            new_text: None,
+        }]);
+        // The parser should handle this gracefully.
+        // We don't care exactly what it emits, just that it doesn't panic.
+        let _ = events;
+    }
 }

crates/agent/src/tools/evals/edit_file.rs

@@ -361,7 +361,7 @@ impl EditToolTest {
                 abs_path: Path::new("/path/to/root").into(),
                 rules_file: None,
             }];
-            let project_context = ProjectContext::new(worktrees, Vec::default());
+            let project_context = ProjectContext::new(worktrees);
             let tool_names = tools
                 .iter()
                 .map(|tool| tool.name.clone().into())
@@ -371,6 +371,8 @@ impl EditToolTest {
                 available_tools: tool_names,
                 model_name: None,
                 date: chrono::Local::now().format("%Y-%m-%d").to_string(),
+                user_agents_md: None,
+                sandboxing: false,
             };
             let templates = Templates::new();
             template.render(&templates)?

crates/agent/src/tools/evals/terminal_tool.rs

@@ -220,7 +220,7 @@ impl TerminalToolTest {
                 abs_path: Path::new("/path/to/root").into(),
                 rules_file: None,
             }];
-            let project_context = ProjectContext::new(worktrees, Vec::default());
+            let project_context = ProjectContext::new(worktrees);
             let tool_names = tools
                 .iter()
                 .map(|tool| tool.name.clone().into())
@@ -230,6 +230,8 @@ impl TerminalToolTest {
                 available_tools: tool_names,
                 model_name: None,
                 date: chrono::Local::now().format("%Y-%m-%d").to_string(),
+                user_agents_md: None,
+                sandboxing: false,
             };
             template.render(&Templates::new())?
         };

crates/agent/src/tools/evals/write_file.rs

@@ -191,7 +191,7 @@ impl WriteToolTest {
                 abs_path: Path::new("/path/to/root").into(),
                 rules_file: None,
             }];
-            let project_context = ProjectContext::new(worktrees, Vec::default());
+            let project_context = ProjectContext::new(worktrees);
             let tool_names = tools
                 .iter()
                 .map(|tool| tool.name.clone().into())
@@ -201,6 +201,8 @@ impl WriteToolTest {
                 available_tools: tool_names,
                 model_name: None,
                 date: chrono::Local::now().format("%Y-%m-%d").to_string(),
+                user_agents_md: None,
+                sandboxing: false,
             };
             let templates = Templates::new();
             template.render(&templates)?

crates/agent/src/tools/list_directory_tool.rs

@@ -18,11 +18,13 @@ use std::sync::Arc;
 use util::markdown::MarkdownInlineCode;
 
 /// Lists files and directories in a given path. Prefer the `grep` or `find_path` tools when searching the codebase.
+///
+/// The only supported path outside the project is `~/.agents/skills` or a descendant, for global agent skills.
 #[derive(Debug, Serialize, Deserialize, JsonSchema)]
 pub struct ListDirectoryToolInput {
     /// The fully-qualified path of the directory to list in the project.
     ///
-    /// This path should never be absolute, and the first component of the path should always be a root directory in a project.
+    /// This path should never be absolute, and the first component of the path should always be a root directory in a project, unless it's a global agent skill directory under `~/.agents/skills`.
     ///
     /// <example>
     /// If the project has the following root directories:
@@ -41,6 +43,10 @@ pub struct ListDirectoryToolInput {
     ///
     /// If you wanna list contents in the directory `foo/baz`, you should use the path `foo/baz`.
     /// </example>
+    ///
+    /// <example>
+    /// To list a global agent skill directory, you may provide a path under `~/.agents/skills`, such as `~/.agents/skills/my-skill`.
+    /// </example>
     pub path: String,
 }
 
@@ -234,7 +240,7 @@ impl AgentTool for ListDirectoryTool {
 
             // Fast path: a global skill resource lives outside any worktree, so
             // standard project-path resolution would refuse it. If the path
-            // resolves under the global skills tree, list it directly.
+            // expands and resolves under the global skills tree, list it directly.
             if let Some(skill_path) =
                 resolve_global_skill_path(Path::new(&input.path), fs.as_ref()).await
             {

crates/agent/src/tools/move_path_tool.rs

@@ -1,6 +1,7 @@
 use super::tool_permissions::{
     authorize_symlink_escapes, canonicalize_worktree_roots, collect_symlink_escapes,
-    sensitive_settings_kind,
+    resolve_creatable_global_skill_descendant_path, resolve_global_skill_descendant_path,
+    resolves_to_global_skills_dir, sensitive_settings_kind,
 };
 use crate::{
     AgentTool, ToolCallEventStream, ToolInput, ToolPermissionDecision,
@@ -22,6 +23,7 @@ use util::markdown::MarkdownInlineCode;
 /// If the source and destination directories are the same, but the filename is different, this performs a rename. Otherwise, it performs a move.
 ///
 /// This tool should be used when it's desirable to move or rename a file or directory without changing its contents at all.
+/// The only supported paths outside the project are descendants of `~/.agents/skills`, for global agent skills.
 #[derive(Debug, Serialize, Deserialize, JsonSchema)]
 pub struct MovePathToolInput {
     /// The source path of the file or directory to move/rename.
@@ -116,6 +118,28 @@ impl AgentTool for MovePathTool {
             let fs = project.read_with(cx, |project, _cx| project.fs().clone());
             let canonical_roots = canonicalize_worktree_roots(&project, &fs, cx).await;
 
+            if resolves_to_global_skills_dir(Path::new(&input.source_path), fs.as_ref()).await
+                || resolves_to_global_skills_dir(
+                    Path::new(&input.destination_path),
+                    fs.as_ref(),
+                )
+                .await
+            {
+                return Err(
+                    "Cannot move the global agent skills directory itself. Move a skill directory or file beneath it instead."
+                        .to_string(),
+                );
+            }
+
+            let global_source_path =
+                resolve_global_skill_descendant_path(Path::new(&input.source_path), fs.as_ref())
+                    .await;
+            let global_destination_path = resolve_creatable_global_skill_descendant_path(
+                Path::new(&input.destination_path),
+                fs.as_ref(),
+            )
+            .await;
+
             let symlink_escapes: Vec<(&str, std::path::PathBuf)> =
                 project.read_with(cx, |project, cx| {
                     collect_symlink_escapes(
@@ -176,6 +200,65 @@ impl AgentTool for MovePathTool {
                 authorize.await.map_err(|e| e.to_string())?;
             }
 
+            if global_source_path.is_some() || global_destination_path.is_some() {
+                let source_path = if let Some(global_source_path) = global_source_path {
+                    global_source_path
+                } else {
+                    project.read_with(cx, |project, cx| {
+                        let project_path = project.find_project_path(&input.source_path, cx).ok_or_else(|| {
+                            format!("Source path {} was not found in the project.", input.source_path)
+                        })?;
+                        project.entry_for_path(&project_path, cx).ok_or_else(|| {
+                            format!("Source path {} was not found in the project.", input.source_path)
+                        })?;
+                        project.absolute_path(&project_path, cx).ok_or_else(|| {
+                            format!("Source path {} could not be resolved.", input.source_path)
+                        })
+                    })?
+                };
+
+                let destination_path = if let Some(global_destination_path) = global_destination_path
+                {
+                    global_destination_path
+                } else {
+                    project.read_with(cx, |project, cx| {
+                        let project_path = project.find_project_path(&input.destination_path, cx).ok_or_else(|| {
+                            format!(
+                                "Destination path {} was outside the project.",
+                                input.destination_path
+                            )
+                        })?;
+                        project.absolute_path(&project_path, cx).ok_or_else(|| {
+                            format!(
+                                "Destination path {} could not be resolved.",
+                                input.destination_path
+                            )
+                        })
+                    })?
+                };
+
+                futures::select! {
+                    result = fs.rename(
+                        &source_path,
+                        &destination_path,
+                        fs::RenameOptions {
+                            create_parents: true,
+                            ..fs::RenameOptions::default()
+                        },
+                    ).fuse() => {
+                        result.map_err(|e| format!("Moving {} to {}: {e}", input.source_path, input.destination_path))?;
+                    }
+                    _ = event_stream.cancelled_by_user().fuse() => {
+                        return Err("Move cancelled by user".to_string());
+                    }
+                }
+
+                return Ok(format!(
+                    "Moved {} to {}",
+                    input.source_path, input.destination_path
+                ));
+            }
+
             let rename_task = project.update(cx, |project, cx| {
                 match project
                     .find_project_path(&input.source_path, cx)
@@ -232,6 +315,125 @@ mod tests {
         });
     }
 
+    #[gpui::test]
+    async fn test_move_path_global_skill_directory_to_project(cx: &mut TestAppContext) {
+        init_test(cx);
+
+        let fs = FakeFs::new(cx.executor());
+        fs.insert_tree(path!("/root/project"), json!({})).await;
+        let skill_dir = agent_skills::global_skills_dir().join("my-skill");
+        fs.insert_tree(&skill_dir, json!({ "SKILL.md": "content" }))
+            .await;
+        let project = Project::test(fs.clone(), [path!("/root/project").as_ref()], cx).await;
+        cx.executor().run_until_parked();
+
+        let tool = Arc::new(MovePathTool::new(project));
+        let input_path = PathBuf::from("~")
+            .join(".agents")
+            .join("skills")
+            .join("my-skill")
+            .to_string_lossy()
+            .into_owned();
+        let destination_path = path!("/root/project/my-skill").to_string();
+
+        let (event_stream, mut event_rx) = ToolCallEventStream::test();
+        let task = cx.update(|cx| {
+            tool.run(
+                ToolInput::resolved(MovePathToolInput {
+                    source_path: input_path,
+                    destination_path,
+                }),
+                event_stream,
+                cx,
+            )
+        });
+
+        let auth = event_rx.expect_authorization().await;
+        let title = auth.tool_call.fields.title.as_deref().unwrap_or("");
+        assert!(
+            title.contains("agent skills"),
+            "Authorization title should mention agent skills, got: {title}",
+        );
+        auth.response
+            .send(acp_thread::SelectedPermissionOutcome::new(
+                acp::PermissionOptionId::new("allow"),
+                acp::PermissionOptionKind::AllowOnce,
+            ))
+            .expect("authorization response should send");
+
+        let result = task.await;
+        assert!(result.is_ok(), "should move after approval: {result:?}");
+        assert!(!fs.is_dir(&skill_dir).await);
+        assert_eq!(
+            fs.load(path!("/root/project/my-skill/SKILL.md").as_ref())
+                .await
+                .unwrap(),
+            "content"
+        );
+    }
+
+    #[gpui::test]
+    async fn test_move_path_project_directory_to_global_skill_directory(cx: &mut TestAppContext) {
+        init_test(cx);
+
+        let fs = FakeFs::new(cx.executor());
+        fs.insert_tree(
+            path!("/root/project"),
+            json!({ "exported-skill": { "SKILL.md": "content" } }),
+        )
+        .await;
+        let skills_dir = agent_skills::global_skills_dir();
+        fs.create_dir(&skills_dir).await.unwrap();
+        let project = Project::test(fs.clone(), [path!("/root/project").as_ref()], cx).await;
+        cx.executor().run_until_parked();
+
+        let tool = Arc::new(MovePathTool::new(project));
+        let destination_path = PathBuf::from("~")
+            .join(".agents")
+            .join("skills")
+            .join("exported-skill")
+            .to_string_lossy()
+            .into_owned();
+
+        let (event_stream, mut event_rx) = ToolCallEventStream::test();
+        let task = cx.update(|cx| {
+            tool.run(
+                ToolInput::resolved(MovePathToolInput {
+                    source_path: path!("/root/project/exported-skill").to_string(),
+                    destination_path,
+                }),
+                event_stream,
+                cx,
+            )
+        });
+
+        let auth = event_rx.expect_authorization().await;
+        let title = auth.tool_call.fields.title.as_deref().unwrap_or("");
+        assert!(
+            title.contains("agent skills"),
+            "Authorization title should mention agent skills, got: {title}",
+        );
+        auth.response
+            .send(acp_thread::SelectedPermissionOutcome::new(
+                acp::PermissionOptionId::new("allow"),
+                acp::PermissionOptionKind::AllowOnce,
+            ))
+            .expect("authorization response should send");
+
+        let result = task.await;
+        assert!(result.is_ok(), "should move after approval: {result:?}");
+        assert!(
+            !fs.is_dir(path!("/root/project/exported-skill").as_ref())
+                .await
+        );
+        assert_eq!(
+            fs.load(skills_dir.join("exported-skill").join("SKILL.md").as_ref())
+                .await
+                .unwrap(),
+            "content"
+        );
+    }
+
     #[gpui::test]
     async fn test_move_path_symlink_escape_source_requests_authorization(cx: &mut TestAppContext) {
         init_test(cx);

crates/agent/src/tools/read_file_tool.rs

@@ -18,6 +18,80 @@ fn tool_content_err(e: impl std::fmt::Display) -> LanguageModelToolResultContent
     LanguageModelToolResultContent::from(e.to_string())
 }
 
+/// Resolves the optional `start_line` / `end_line` inputs from the tool schema
+/// to a concrete 1-indexed, inclusive `(start, end)` line range:
+///
+/// - `start` defaults to 1 and is clamped to `>= 1` (the model occasionally passes
+///   `0` despite instructions to be 1-indexed).
+/// - `end` defaults to `u32::MAX` and is clamped to `>= start`, so callers always
+///   read at least one line even when the model passes `end < start`.
+///
+/// Callers translate this 1-indexed inclusive range to whichever coordinate
+/// system their slicing API wants (e.g. 0-indexed exclusive row ranges for
+/// `Buffer::text_for_range`).
+fn resolve_line_range(start_line: Option<u32>, end_line: Option<u32>) -> (u32, u32) {
+    let start = start_line.unwrap_or(1).max(1);
+    let end = end_line.unwrap_or(u32::MAX).max(start);
+    (start, end)
+}
+
+/// Prefixes each line of `text` with its line number in `cat -n` format:
+/// the line number is right-aligned in a 6-character field, followed by a
+/// single tab, followed by the line's original content (including its
+/// trailing newline if present). Numbering starts at `start_line`.
+///
+/// This format matches what the model expects in the edit tool, where the
+/// line number prefix is `line number + tab` and everything after the tab is
+/// the actual file content to match.
+fn format_with_line_numbers(text: &str, start_line: u32) -> String {
+    if text.is_empty() {
+        return String::new();
+    }
+
+    let mut output = String::with_capacity(text.len() + text.len() / 4);
+    write_lines_numbered(&mut output, std::iter::once(text), start_line);
+    output
+}
+
+/// Streams `cat -n`-style line-numbered output directly into `output` from an
+/// iterator of string slices. Chunks do not need to align to line boundaries:
+/// a single chunk may contain multiple newlines, span multiple lines, or end
+/// mid-line. This lets callers consume `Buffer::text_for_range`'s `Chunks`
+/// iterator without materializing the unnumbered text first.
+fn write_lines_numbered<'a>(
+    output: &mut String,
+    chunks: impl IntoIterator<Item = &'a str>,
+    start_line: u32,
+) {
+    use std::fmt::Write as _;
+
+    let mut line_number = start_line;
+    let mut at_line_start = true;
+    for chunk in chunks {
+        let mut rest = chunk;
+        while !rest.is_empty() {
+            if at_line_start {
+                // Writes to a `String` are infallible, so the `Result` can be ignored.
+                let _ = write!(output, "{line_number:>6}\t");
+                at_line_start = false;
+            }
+            match rest.find('\n') {
+                Some(nl) => {
+                    let (head, tail) = rest.split_at(nl + 1);
+                    output.push_str(head);
+                    line_number = line_number.saturating_add(1);
+                    at_line_start = true;
+                    rest = tail;
+                }
+                None => {
+                    output.push_str(rest);
+                    break;
+                }
+            }
+        }
+    }
+}
+
 /// Read a file under the global skills directory directly via the filesystem,
 /// bypassing project/worktree resolution. Used for skill resources that live
 /// outside any worktree.
@@ -40,26 +114,21 @@ async fn read_global_skill_file(
             .line(start_line.map(|line| line.saturating_sub(1))),
     ]));
 
-    let result_text = if start_line.is_some() || end_line.is_some() {
-        // Mirror the line-range semantics of the buffer-backed path: 1-indexed,
-        // start clamped to >= 1, end exclusive of the next line, and always
-        // returning at least one line. `split_inclusive` keeps each line's
-        // terminator attached, so CRLF stays CRLF and the trailing newline of
-        // the last returned line is preserved — matching `Buffer::text_for_range`.
-        let start = start_line.unwrap_or(1).max(1);
-        let mut end = end_line.unwrap_or(u32::MAX);
-        if end < start {
-            end = start;
-        }
-
+    let (raw_text, first_line_number) = if start_line.is_some() || end_line.is_some() {
+        // `split_inclusive` keeps each line's terminator attached, so CRLF stays
+        // CRLF and the trailing newline of the last returned line is preserved —
+        // matching `Buffer::text_for_range` in the buffer-backed path.
+        let (start, end) = resolve_line_range(start_line, end_line);
         let lines: Vec<&str> = content.split_inclusive('\n').collect();
         let start_idx = (start as usize).saturating_sub(1).min(lines.len());
         let end_idx = (end as usize).min(lines.len()).max(start_idx);
-        lines[start_idx..end_idx].concat()
+        (lines[start_idx..end_idx].concat(), start)
     } else {
-        content
+        (content, 1)
     };
 
+    let result_text = format_with_line_numbers(&raw_text, first_line_number);
+
     let markdown = MarkdownCodeBlock {
         tag: requested_path,
         text: &result_text,
@@ -86,11 +155,13 @@ use crate::{AgentTool, ToolCallEventStream, ToolInput, outline};
 ///   Do NOT retry reading the same file without line numbers if you receive an outline.
 /// - This tool supports reading image files. Supported formats: PNG, JPEG, WebP, GIF, BMP, TIFF.
 ///   Image files are returned as visual content that you can analyze directly.
+///
+/// The only supported path outside the project is `~/.agents/skills` or a descendant, for global agent skills.
 #[derive(Debug, Serialize, Deserialize, JsonSchema)]
 pub struct ReadFileToolInput {
     /// The relative path of the file to read.
     ///
-    /// This path should never be absolute, and the first component of the path should always be a root directory in a project.
+    /// This path should never be absolute, and the first component of the path should always be a root directory in a project, unless it's a global agent skill under `~/.agents/skills`.
     ///
     /// <example>
     /// If the project has the following root directories:
@@ -101,6 +172,10 @@ pub struct ReadFileToolInput {
     /// If you want to access `file.txt` in `directory1`, you should use the path `directory1/file.txt`.
     /// If you want to access `file.txt` in `directory2`, you should use the path `directory2/file.txt`.
     /// </example>
+    ///
+    /// <example>
+    /// To read a global agent skill file, you may provide a path under `~/.agents/skills`, such as `~/.agents/skills/my-skill/SKILL.md`.
+    /// </example>
     pub path: String,
     /// Optional line number to start reading on (1-based index)
     #[serde(default)]
@@ -182,8 +257,8 @@ impl AgentTool for ReadFileTool {
                 .map_err(tool_content_err)?;
             let fs = project.read_with(cx, |project, _cx| project.fs().clone());
 
-            // Fast path: if the model passes an absolute path that resolves
-            // under the global skills directory, read it directly via the
+            // Fast path: if the model passes a path that resolves under the
+            // global skills directory, read it directly via the
             // filesystem. Global skills live outside any worktree, so the
             // standard project-path machinery would refuse them.
             if let Some(skill_path) =
@@ -338,32 +413,42 @@ impl AgentTool for ReadFileTool {
             }
 
             let mut anchor = None;
+            let mut is_outline_response = false;
 
             // Check if specific line ranges are provided
             let result = if input.start_line.is_some() || input.end_line.is_some() {
-                let result = buffer.read_with(cx, |buffer, _cx| {
-                    // .max(1) because despite instructions to be 1-indexed, sometimes the model passes 0.
-                    let start = input.start_line.unwrap_or(1).max(1);
+                let result_text = buffer.read_with(cx, |buffer, _cx| {
+                    let (start, end) = resolve_line_range(input.start_line, input.end_line);
                     let start_row = start - 1;
                     if start_row <= buffer.max_point().row {
                         let column = buffer.line_indent_for_row(start_row).raw_len();
                         anchor = Some(buffer.anchor_before(Point::new(start_row, column)));
                     }
 
-                    let mut end_row = input.end_line.unwrap_or(u32::MAX);
-                    if end_row <= start_row {
-                        end_row = start_row + 1; // read at least one lines
-                    }
-                    let start = buffer.anchor_before(Point::new(start_row, 0));
-                    let end = buffer.anchor_before(Point::new(end_row, 0));
-                    buffer.text_for_range(start..end).collect::<String>()
+                    // `end` is 1-indexed inclusive; `Point` rows are 0-indexed.
+                    // Using `end` directly as the (exclusive) end row is the
+                    // standard inclusive→exclusive translation, and since
+                    // `resolve_line_range` guarantees `end >= start`, we always
+                    // read at least one line.
+                    let start_anchor = buffer.anchor_before(Point::new(start_row, 0));
+                    let end_anchor = buffer.anchor_before(Point::new(end, 0));
+                    // Stream the numbered output directly from the buffer's
+                    // chunk iterator so the unnumbered range is never
+                    // materialized as its own `String`.
+                    let mut output = String::new();
+                    write_lines_numbered(
+                        &mut output,
+                        buffer.text_for_range(start_anchor..end_anchor),
+                        start,
+                    );
+                    output
                 });
 
                 action_log.update(cx, |log, cx| {
                     log.buffer_read(buffer.clone(), cx);
                 });
 
-                Ok(result.into())
+                Ok(result_text.into())
             } else {
                 // No line ranges specified, so check file size to see if it's too big.
                 let buffer_content = outline::get_buffer_content_or_outline(
@@ -377,7 +462,10 @@ impl AgentTool for ReadFileTool {
                     log.buffer_read(buffer.clone(), cx);
                 });
 
-                if buffer_content.is_outline {
+
+                is_outline_response = buffer_content.is_synthetic;
+
+                if buffer_content.is_synthetic {
                     Ok(formatdoc! {"
                         SUCCESS: File outline retrieved. This file is too large to read all at once, so the outline below shows the file's structure with line numbers.
 
@@ -391,7 +479,7 @@ impl AgentTool for ReadFileTool {
                     }
                     .into())
                 } else {
-                    Ok(buffer_content.text.into())
+                    Ok(format_with_line_numbers(&buffer_content.text, 1).into())
                 }
             };
 
@@ -409,11 +497,12 @@ impl AgentTool for ReadFileTool {
                 }
                 if let Ok(LanguageModelToolResultContent::Text(text)) = &result {
                     let text: &str = text;
-                    let markdown = MarkdownCodeBlock {
-                        tag: &input.path,
-                        text,
-                    }
-                    .to_string();
+                    // For outline responses, omit the path tag so the markdown renderer
+                    // does not invoke tree-sitter syntax highlighting against pseudo-code
+                    // outline text. The outline is not valid source for the file's language,
+                    // so highlighting would be both expensive and incorrect.
+                    let tag: &str = if is_outline_response { "" } else { &input.path };
+                    let markdown = MarkdownCodeBlock { tag, text }.to_string();
                     event_stream.update_fields(acp::ToolCallUpdateFields::new().content(vec![
                         acp::ToolCallContent::Content(acp::Content::new(markdown)),
                     ]));
@@ -423,6 +512,27 @@ impl AgentTool for ReadFileTool {
             result
         })
     }
+
+    fn replay(
+        &self,
+        input: Self::Input,
+        output: Self::Output,
+        event_stream: ToolCallEventStream,
+        _cx: &mut App,
+    ) -> Result<()> {
+        if let LanguageModelToolResultContent::Text(text) = output {
+            let markdown = MarkdownCodeBlock {
+                tag: &input.path,
+                text: &text,
+            }
+            .to_string();
+            event_stream.update_fields(acp::ToolCallUpdateFields::new().content(vec![
+                acp::ToolCallContent::Content(acp::Content::new(markdown)),
+            ]));
+        }
+
+        Ok(())
+    }
 }
 
 #[cfg(test)]
@@ -526,7 +636,10 @@ mod test {
                 )
             })
             .await;
-        assert_eq!(result.unwrap(), "This is a small file content".into());
+        assert_eq!(
+            result.unwrap(),
+            "     1\tThis is a small file content".into()
+        );
     }
 
     #[gpui::test]
@@ -610,6 +723,172 @@ mod test {
         );
     }
 
+    // The outline returned for a large file is not valid source for the file's
+    // language, so the UI-side markdown wrapping must omit the path tag.
+    // Otherwise the markdown renderer routes the fenced block through
+    // `CodeBlockKind::FencedSrc`, resolves the file's language, and runs
+    // tree-sitter against pseudo-code outline text on every paint.
+    #[gpui::test]
+    async fn test_outline_response_uses_untagged_code_block(cx: &mut TestAppContext) {
+        init_test(cx);
+
+        let fs = FakeFs::new(cx.executor());
+        fs.insert_tree(
+            path!("/root"),
+            json!({
+                "large_file.rs": (0..1000).map(|i| format!("struct Test{} {{\n    a: u32,\n    b: usize,\n}}", i)).collect::<Vec<_>>().join("\n")
+            }),
+        )
+        .await;
+        let project = Project::test(fs.clone(), [path!("/root").as_ref()], cx).await;
+        let language_registry = project.read_with(cx, |project, _| project.languages().clone());
+        language_registry.add(language::rust_lang());
+        let action_log = cx.new(|_| ActionLog::new(project.clone()));
+        let tool = Arc::new(ReadFileTool::new(project, action_log, true));
+        let (event_stream, mut rx) = ToolCallEventStream::test();
+
+        let result = cx
+            .update(|cx| {
+                let input = ReadFileToolInput {
+                    path: "root/large_file.rs".into(),
+                    start_line: None,
+                    end_line: None,
+                };
+                tool.clone()
+                    .run(ToolInput::resolved(input), event_stream, cx)
+            })
+            .await
+            .unwrap();
+
+        // Sanity-check: the file is large enough to trigger the outline branch.
+        assert!(
+            result
+                .to_str()
+                .unwrap()
+                .starts_with("SUCCESS: File outline retrieved."),
+            "expected outline response, got: {:?}",
+            result.to_str().unwrap()
+        );
+
+        // The first update carries the location; the second carries the
+        // markdown content destined for the tool-call UI.
+        let _location_update = rx.expect_update_fields().await;
+        let content_update = rx.expect_update_fields().await;
+        let content_blocks = content_update.content.expect("expected content update");
+        let acp::ToolCallContent::Content(content) = content_blocks
+            .first()
+            .expect("expected at least one content block")
+        else {
+            panic!("expected ContentBlock, got {:?}", content_blocks.first());
+        };
+        let acp::ContentBlock::Text(text) = &content.content else {
+            panic!("expected text content block, got {:?}", content.content);
+        };
+
+        assert!(
+            text.text.starts_with("```\n"),
+            "outline response must use an untagged fenced code block; got first line: {:?}",
+            text.text.lines().next()
+        );
+        assert!(
+            !text.text.starts_with("```root/"),
+            "outline response must not include the file path as a code block tag"
+        );
+    }
+
+    // The full-file (non-outline) response should still tag the code block
+    // with the file path so the markdown renderer can resolve the file's
+    // language for syntax highlighting.
+    #[gpui::test]
+    async fn test_full_file_response_keeps_path_tag(cx: &mut TestAppContext) {
+        init_test(cx);
+
+        let fs = FakeFs::new(cx.executor());
+        fs.insert_tree(
+            path!("/root"),
+            json!({
+                "small_file.rs": "fn main() {}"
+            }),
+        )
+        .await;
+        let project = Project::test(fs.clone(), [path!("/root").as_ref()], cx).await;
+        let action_log = cx.new(|_| ActionLog::new(project.clone()));
+        let tool = Arc::new(ReadFileTool::new(project, action_log, true));
+        let (event_stream, mut rx) = ToolCallEventStream::test();
+
+        cx.update(|cx| {
+            let input = ReadFileToolInput {
+                path: "root/small_file.rs".into(),
+                start_line: None,
+                end_line: None,
+            };
+            tool.clone()
+                .run(ToolInput::resolved(input), event_stream, cx)
+        })
+        .await
+        .unwrap();
+
+        let _location_update = rx.expect_update_fields().await;
+        let content_update = rx.expect_update_fields().await;
+        let content_blocks = content_update.content.expect("expected content update");
+        let acp::ToolCallContent::Content(content) = content_blocks
+            .first()
+            .expect("expected at least one content block")
+        else {
+            panic!("expected ContentBlock, got {:?}", content_blocks.first());
+        };
+        let acp::ContentBlock::Text(text) = &content.content else {
+            panic!("expected text content block, got {:?}", content.content);
+        };
+
+        assert!(
+            text.text.starts_with("```root/small_file.rs\n"),
+            "full-file response must tag the code block with the file path; got first line: {:?}",
+            text.text.lines().next()
+        );
+    }
+
+    // When a worktree is named "foo" and contains a subdirectory also named "foo",
+    // read_file({"path": "foo/test.txt"}) should return the file at the worktree
+    // root (as the tool schema promises), not the one inside the foo/ subdirectory.
+    #[gpui::test]
+    async fn test_read_file_worktree_root_not_shadowed_by_subdir(cx: &mut TestAppContext) {
+        init_test(cx);
+
+        let fs = FakeFs::new(cx.executor());
+        fs.insert_tree(
+            path!("/foo"),
+            json!({
+                "test.txt": "root content",
+                "foo": {
+                    "test.txt": "subdir content"
+                }
+            }),
+        )
+        .await;
+        let project = Project::test(fs.clone(), [path!("/foo").as_ref()], cx).await;
+        let action_log = cx.new(|_| ActionLog::new(project.clone()));
+        let tool = Arc::new(ReadFileTool::new(project, action_log, true));
+
+        // The tool schema says the first component must be the worktree root name,
+        // so "foo/test.txt" means test.txt at the root of the "foo" worktree.
+        let result = cx
+            .update(|cx| {
+                let input = ReadFileToolInput {
+                    path: "foo/test.txt".into(),
+                    start_line: None,
+                    end_line: None,
+                };
+                tool.run(
+                    ToolInput::resolved(input),
+                    ToolCallEventStream::test().0,
+                    cx,
+                )
+            })
+            .await;
+        assert_eq!(result.unwrap(), "     1\troot content".into());
+    }
+
     #[gpui::test]
     async fn test_read_file_with_line_range(cx: &mut TestAppContext) {
         init_test(cx);
@@ -640,7 +919,10 @@ mod test {
                 )
             })
             .await;
-        assert_eq!(result.unwrap(), "Line 2\nLine 3\nLine 4\n".into());
+        assert_eq!(
+            result.unwrap(),
+            "     2\tLine 2\n     3\tLine 3\n     4\tLine 4\n".into()
+        );
     }
 
     #[gpui::test]
@@ -674,7 +956,7 @@ mod test {
                 )
             })
             .await;
-        assert_eq!(result.unwrap(), "Line 1\nLine 2\n".into());
+        assert_eq!(result.unwrap(), "     1\tLine 1\n     2\tLine 2\n".into());
 
         // end_line of 0 should result in at least 1 line
         let result = cx
@@ -691,7 +973,7 @@ mod test {
                 )
             })
             .await;
-        assert_eq!(result.unwrap(), "Line 1\n".into());
+        assert_eq!(result.unwrap(), "     1\tLine 1\n".into());
 
         // when start_line > end_line, should still return at least 1 line
         let result = cx
@@ -708,7 +990,7 @@ mod test {
                 )
             })
             .await;
-        assert_eq!(result.unwrap(), "Line 3\n".into());
+        assert_eq!(result.unwrap(), "     3\tLine 3\n".into());
     }
 
     fn error_text(content: LanguageModelToolResultContent) -> String {
@@ -942,7 +1224,7 @@ mod test {
             })
             .await;
         assert!(result.is_ok(), "Should be able to read normal files");
-        assert_eq!(result.unwrap(), "Normal file content".into());
+        assert_eq!(result.unwrap(), "     1\tNormal file content".into());
 
         // Path traversal attempts with .. should fail
         let result = cx
@@ -1112,7 +1394,7 @@ mod test {
 
         assert_eq!(
             result,
-            "fn main() { println!(\"Hello from worktree1\"); }".into()
+            "     1\tfn main() { println!(\"Hello from worktree1\"); }".into()
         );
 
         // Test reading private file in worktree1 should fail
@@ -1178,7 +1460,7 @@ mod test {
 
         assert_eq!(
             result,
-            "export function greet() { return 'Hello from worktree2'; }".into()
+            "     1\texport function greet() { return 'Hello from worktree2'; }".into()
         );
 
         // Test reading private file in worktree2 should fail
@@ -1488,7 +1770,10 @@ mod test {
         let LanguageModelToolResultContent::Text(text) = content else {
             panic!("expected text content");
         };
-        assert_eq!(text.as_ref(), "# Spec\n\nReference body.");
+        assert_eq!(
+            text.as_ref(),
+            "     1\t# Spec\n     2\t\n     3\tReference body."
+        );
     }
 
     #[gpui::test]
@@ -1535,7 +1820,7 @@ mod test {
         };
         // Mirrors the buffer-backed path: lines 2-3 inclusive, WITH trailing
         // newline of the last returned line.
-        assert_eq!(text.as_ref(), "line two\nline three\n");
+        assert_eq!(text.as_ref(), "     2\tline two\n     3\tline three\n");
     }
 
     #[gpui::test]
@@ -1580,7 +1865,7 @@ mod test {
         let LanguageModelToolResultContent::Text(text) = result.unwrap() else {
             panic!("expected text content");
         };
-        assert_eq!(text.as_ref(), "Line 1\nLine 2\n");
+        assert_eq!(text.as_ref(), "     1\tLine 1\n     2\tLine 2\n");
     }
 
     #[gpui::test]
@@ -1625,7 +1910,7 @@ mod test {
         let LanguageModelToolResultContent::Text(text) = result.unwrap() else {
             panic!("expected text content");
         };
-        assert_eq!(text.as_ref(), "Line 1\n");
+        assert_eq!(text.as_ref(), "     1\tLine 1\n");
     }
 
     #[gpui::test]
@@ -1670,7 +1955,7 @@ mod test {
         let LanguageModelToolResultContent::Text(text) = result.unwrap() else {
             panic!("expected text content");
         };
-        assert_eq!(text.as_ref(), "Line 3\n");
+        assert_eq!(text.as_ref(), "     3\tLine 3\n");
     }
 
     #[gpui::test]
@@ -1715,7 +2000,7 @@ mod test {
         let LanguageModelToolResultContent::Text(text) = result.unwrap() else {
             panic!("expected text content");
         };
-        assert_eq!(text.as_ref(), "line one\r\nline two\r\n");
+        assert_eq!(text.as_ref(), "     1\tline one\r\n     2\tline two\r\n");
     }
 
     #[gpui::test]

crates/agent/src/tools/rename_tool.rs

@@ -2,6 +2,7 @@ use std::fmt::Write;
 use std::sync::Arc;
 
 use agent_client_protocol::schema as acp;
+use collections::HashSet;
 use gpui::{App, Entity, SharedString, Task};
 use project::Project;
 use schemars::JsonSchema;
@@ -95,6 +96,12 @@ impl AgentTool for RenameTool {
                 ));
             }
 
+            let buffers = transaction.0.keys().cloned().collect::<HashSet<_>>();
+            project
+                .update(cx, |project, cx| project.save_buffers(buffers, cx))
+                .await
+                .map_err(|e| format!("Rename succeeded, but failed to save renamed files: {e}"))?;
+
             let mut output = format!(
                 "Renamed `{}` to `{}` in {} file(s):\n",
                 input.symbol.symbol_name,

crates/agent/src/tools/skill_tool.rs

@@ -46,11 +46,12 @@ fn neutralize_envelope_tags(input: &str) -> String {
 /// frontmatter), not O(total file size).
 pub fn render_skill_envelope(skill: &Skill, body: &str) -> String {
     let source = match &skill.source {
+        agent_skills::SkillSource::BuiltIn => "built-in",
         agent_skills::SkillSource::Global => "global",
         agent_skills::SkillSource::ProjectLocal { .. } => "project-local",
     };
     let worktree = match &skill.source {
-        agent_skills::SkillSource::Global => None,
+        agent_skills::SkillSource::BuiltIn | agent_skills::SkillSource::Global => None,
         agent_skills::SkillSource::ProjectLocal {
             worktree_root_name, ..
         } => Some(worktree_root_name.clone()),
@@ -200,31 +201,33 @@ impl AgentTool for SkillTool {
                 (skill.clone(), path_string)
             };
 
-            // Read the body on demand. Bodies are not kept in memory
-            // between materializations — see `agent_skills::read_skill_body`.
-            let body = agent_skills::read_skill_body(self.fs.as_ref(), &skill.skill_file_path)
-                .await
-                .map_err(|e| SkillToolOutput::Error {
-                    error: e.to_string(),
-                })?;
+            // For built-in skills the body is already in memory (compiled
+            // into the binary). For user skills, read on demand from disk.
+            let body = if let Some(embedded) = skill.embedded_body {
+                embedded.to_string()
+            } else {
+                agent_skills::read_skill_body(self.fs.as_ref(), &skill.skill_file_path)
+                    .await
+                    .map_err(|e| SkillToolOutput::Error {
+                        error: e.to_string(),
+                    })?
+            };
             let rendered = render_skill_envelope(&skill, &body);
 
-            // Activations go through the standard tool-permission flow so
-            // they participate in the same Allow-Once / Always-Allow UX as
-            // every other built-in tool. The auth context value is the
-            // skill's absolute SKILL.md path so that "always allow this
-            // specific skill" is keyed to a specific file: editing the
-            // SKILL.md will change the path's content but not the path,
-            // so for content-change re-trust we'd want a hash too — but
-            // at minimum, two skills with the same name from different
-            // locations get independent trust grants.
-            let authorize = cx.update(|cx| {
-                let context = crate::ToolPermissionContext::new(Self::NAME, vec![skill_file_path]);
-                event_stream.authorize(self.initial_title(Ok(input), cx), context, cx)
-            });
-            authorize.await.map_err(|e| SkillToolOutput::Error {
-                error: e.to_string(),
-            })?;
+            // Built-in skills ship with Zed and are trusted by default,
+            // so they skip the authorization prompt. User-installed skills
+            // go through the standard Allow-Once / Always-Allow UX.
+            let is_builtin = skill.source == agent_skills::SkillSource::BuiltIn;
+            if !is_builtin {
+                let authorize = cx.update(|cx| {
+                    let context =
+                        crate::ToolPermissionContext::new(Self::NAME, vec![skill_file_path]);
+                    event_stream.authorize(self.initial_title(Ok(input), cx), context, cx)
+                });
+                authorize.await.map_err(|e| SkillToolOutput::Error {
+                    error: e.to_string(),
+                })?;
+            }
 
             Ok(SkillToolOutput::Found { rendered })
         })

crates/agent/src/tools/terminal_tool.rs

@@ -14,6 +14,7 @@ use std::{
     time::Duration,
 };
 
+use crate::sandboxing::sandboxing_enabled;
 use crate::{AgentTool, ThreadEnvironment, ToolCallEventStream, ToolInput};
 
 const COMMAND_OUTPUT_LIMIT: u64 = 16 * 1024;
@@ -39,7 +40,7 @@ const COMMAND_OUTPUT_LIMIT: u64 = 16 * 1024;
 /// - Always insert `--no-pager` immediately after `git` for any read-only git command, including `git log`, `git diff`, `git show`, `git blame`, and `git stash show`. Example: `git --no-pager log -n 5` (NOT `git log -n 5`).
 /// - Always prepend `GIT_EDITOR=true ` to any git command that may invoke an editor, including `git rebase`, `git commit`, `git merge`, and `git tag`. Example: `GIT_EDITOR=true git rebase origin/main` (NOT `git rebase origin/main`).
 /// - For other commands that may open a pager or editor, set `PAGER=cat` and/or `EDITOR=true` similarly.
-#[derive(Clone, Debug, Serialize, Deserialize, JsonSchema)]
+#[derive(Clone, Debug, Default, Serialize, Deserialize, JsonSchema)]
 pub struct TerminalToolInput {
     /// The one-liner command to execute. Do not include shell substitutions or interpolations such as `$VAR`, `${VAR}`, `$(...)`, backticks, `$((...))`, `<(...)`, or `>(...)`; resolve those values first or ask the user.
     ///
@@ -49,6 +50,35 @@ pub struct TerminalToolInput {
     pub cd: String,
     /// Optional maximum runtime (in milliseconds). If exceeded, the running terminal task is killed.
     pub timeout_ms: Option<u64>,
+    /// Request network access for this command.
+    ///
+    /// Only meaningful when the system prompt's "Terminal sandbox" section
+    /// is present — ignored otherwise. By default sandboxed commands
+    /// cannot make outbound network connections; set this to `true` only
+    /// when the command needs network access. The user will be prompted
+    /// to approve before the command runs.
+    #[serde(default)]
+    pub allow_network: Option<bool>,
+    /// Request unrestricted filesystem-write access for this command.
+    ///
+    /// Only meaningful when the system prompt's "Terminal sandbox" section
+    /// is present — ignored otherwise. By default sandboxed commands can
+    /// only write to the project worktree directories and a per-command
+    /// temporary directory; set this to `true` only when the command
+    /// needs to write elsewhere. The user will be prompted to approve
+    /// before the command runs.
+    #[serde(default)]
+    pub allow_fs_write: Option<bool>,
+    /// Request to run this command outside the sandbox entirely.
+    ///
+    /// Only meaningful when the system prompt's "Terminal sandbox" section
+    /// is present — ignored otherwise. Prefer `allow_network: true` or
+    /// `allow_fs_write: true` when one of those is enough. Set this to
+    /// `true` ONLY when the command needs behavior that the sandbox can't
+    /// grant on a per-permission basis. The user will be prompted to
+    /// approve before the command runs without sandbox restrictions.
+    #[serde(default)]
+    pub unsandboxed: Option<bool>,
 }
 
 pub struct TerminalTool {
@@ -96,24 +126,100 @@ impl AgentTool for TerminalTool {
         cx.spawn(async move |cx| {
             let input = input.recv().await.map_err(|e| e.to_string())?;
 
-            let (working_dir, authorize) = cx.update(|cx| {
+            let (working_dir, authorize, sandboxing) = cx.update(|cx| {
                 let working_dir =
                     working_dir(&input, &self.project, cx).map_err(|err| err.to_string())?;
                 let context =
                     crate::ToolPermissionContext::new(Self::NAME, vec![input.command.clone()]);
                 let authorize =
                     event_stream.authorize(self.initial_title(Ok(input.clone()), cx), context, cx);
-                Result::<_, String>::Ok((working_dir, authorize))
+                let sandboxing = sandboxing_enabled(cx);
+                Result::<_, String>::Ok((working_dir, authorize, sandboxing))
             })?;
 
             authorize.await.map_err(|e| e.to_string())?;
 
+            // Sandbox flags only do anything when sandboxing is on. When
+            // off, we treat them as `None` so the model can't surreptitiously
+            // change runtime behavior by setting flags described as a no-op
+            // in the system prompt.
+            let want_network = sandboxing && input.allow_network == Some(true);
+            let want_fs_write = sandboxing && input.allow_fs_write == Some(true);
+            let want_unsandboxed = sandboxing && input.unsandboxed == Some(true);
+
+            // `unsandboxed: true` bypasses the wrap entirely; per-permission
+            // requests are only meaningful when the command is still being
+            // sandboxed.
+            let escalate = !want_unsandboxed && (want_network || want_fs_write);
+
+            if want_unsandboxed || escalate {
+                let title = sandbox_approval_title(want_network, want_fs_write, want_unsandboxed);
+                let approve = cx.update(|cx| {
+                    let context = crate::ToolPermissionContext::new(
+                        Self::NAME,
+                        vec![input.command.clone()],
+                    );
+                    // Sandbox escalations always prompt, even if the user
+                    // has `always_allow` rules for this command — the
+                    // escalation is a stronger trust boundary than the
+                    // baseline command approval.
+                    event_stream.authorize_always_prompt(title, context, cx)
+                });
+                if let Err(error) = approve.await {
+                    return Ok(if want_unsandboxed {
+                        format!(
+                            "Command cancelled: user denied permission to run outside the sandbox ({error})."
+                        )
+                    } else {
+                        format!(
+                            "Command cancelled: user denied the requested sandbox permissions ({error})."
+                        )
+                    });
+                }
+            }
+
+            // The per-thread scratch directory (and the `$TMPDIR`/`TMP`/
+            // `TEMP` environment variables pointing at it) is provisioned by
+            // the thread environment in `create_terminal`, which also adds it
+            // to the sandbox's writable scope. We must not set `$TMPDIR` here:
+            // the environment overrides it with the per-thread directory, so a
+            // per-command directory set here would never be the `$TMPDIR` the
+            // command actually sees and would be left out of the writable
+            // scope, breaking writes into `$TMPDIR`.
+            let extra_env = Vec::new();
+
+            // Build the writable scope from the project's worktrees. The
+            // per-thread temp directory is appended by the thread environment
+            // (which owns it and points `$TMPDIR` at it). Crucially we do
+            // *not* include the resolved `cd` working directory — that's
+            // model-controlled, and using it as the writable scope would
+            // let the model widen its own write permissions outside the
+            // project.
+            let sandbox_wrap = if sandboxing && !want_unsandboxed {
+                let writable_paths: Vec<PathBuf> = cx.update(|cx| {
+                    self.project
+                        .read(cx)
+                        .worktrees(cx)
+                        .map(|w| w.read(cx).abs_path().to_path_buf())
+                        .collect::<Vec<_>>()
+                });
+                Some(acp_thread::SandboxWrap {
+                    writable_paths,
+                    allow_network: want_network,
+                    allow_fs_write: want_fs_write,
+                })
+            } else {
+                None
+            };
+
             let terminal = self
                 .environment
                 .create_terminal(
                     input.command.clone(),
+                    extra_env,
                     working_dir,
                     Some(COMMAND_OUTPUT_LIMIT),
+                    sandbox_wrap,
                     cx,
                 )
                 .await
@@ -182,6 +288,29 @@ impl AgentTool for TerminalTool {
     }
 }
 
+/// User-facing title for the sandbox-escalation approval prompt.
+///
+/// `want_unsandboxed` wins over the per-permission flags because
+/// `unsandboxed: true` bypasses the per-permission machinery entirely.
+fn sandbox_approval_title(
+    want_network: bool,
+    want_fs_write: bool,
+    want_unsandboxed: bool,
+) -> &'static str {
+    if want_unsandboxed {
+        "Allow this command to run outside the sandbox?"
+    } else {
+        match (want_network, want_fs_write) {
+            (true, true) => "Allow network access and arbitrary filesystem writes?",
+            (true, false) => "Allow network access?",
+            (false, true) => "Allow arbitrary filesystem writes?",
+            // Caller only invokes this when at least one flag is set, so
+            // this fallback is unreachable in practice.
+            (false, false) => "Allow this command to run?",
+        }
+    }
+}
+
 fn process_content(
     output: acp::TerminalOutputResponse,
     command: &str,
@@ -310,6 +439,7 @@ mod tests {
                 .to_string(),
             cd: ".".to_string(),
             timeout_ms: None,
+                    ..Default::default()
         };
 
         let title = format_initial_title(Ok(input));
@@ -369,6 +499,7 @@ mod tests {
                 command: cmd.to_string(),
                 cd: ".".to_string(),
                 timeout_ms: None,
+                ..Default::default()
             };
 
             let title = format_initial_title(Ok(input));
@@ -406,6 +537,7 @@ mod tests {
             command: "echo 'hello world'".to_string(),
             cd: ".".to_string(),
             timeout_ms: None,
+            ..Default::default()
         };
 
         let title = format_initial_title(Ok(input));
@@ -435,6 +567,7 @@ mod tests {
             command: long_command,
             cd: ".".to_string(),
             timeout_ms: None,
+            ..Default::default()
         };
 
         let title = format_initial_title(Ok(input));
@@ -641,6 +774,7 @@ mod tests {
                     command: "echo $HOME".to_string(),
                     cd: "root".to_string(),
                     timeout_ms: None,
+                    ..Default::default()
                 }),
                 event_stream,
                 cx,
@@ -708,6 +842,7 @@ mod tests {
                     command: "echo $HOME".to_string(),
                     cd: "root".to_string(),
                     timeout_ms: None,
+                    ..Default::default()
                 }),
                 event_stream,
                 cx,
@@ -769,6 +904,7 @@ mod tests {
                     command: "echo $(rm -rf /)".to_string(),
                     cd: "root".to_string(),
                     timeout_ms: None,
+                    ..Default::default()
                 }),
                 event_stream,
                 cx,
@@ -838,6 +974,7 @@ mod tests {
                     command: "PAGER=blah git log --oneline".to_string(),
                     cd: "root".to_string(),
                     timeout_ms: None,
+                    ..Default::default()
                 }),
                 event_stream,
                 cx,
@@ -911,6 +1048,7 @@ mod tests {
                     command: "PAGER=blah git log".to_string(),
                     cd: "root".to_string(),
                     timeout_ms: None,
+                    ..Default::default()
                 }),
                 event_stream,
                 cx,
@@ -1018,6 +1156,7 @@ mod tests {
                     command: command.to_string(),
                     cd: "root".to_string(),
                     timeout_ms: None,
+                    ..Default::default()
                 }),
                 event_stream,
                 cx,
@@ -1185,6 +1324,7 @@ mod tests {
                     command: "echo $(whoami)".to_string(),
                     cd: "root".to_string(),
                     timeout_ms: None,
+                    ..Default::default()
                 }),
                 event_stream,
                 cx,
@@ -1257,6 +1397,7 @@ mod tests {
                     command: "PAGER=other git log".to_string(),
                     cd: "root".to_string(),
                     timeout_ms: None,
+                    ..Default::default()
                 }),
                 event_stream,
                 cx,
@@ -1323,6 +1464,7 @@ mod tests {
                     command: "A=1 B=2 git log".to_string(),
                     cd: "root".to_string(),
                     timeout_ms: None,
+                    ..Default::default()
                 }),
                 event_stream,
                 cx,
@@ -1400,6 +1542,7 @@ mod tests {
                     command: "PAGER=\"less -R\" git log".to_string(),
                     cd: "root".to_string(),
                     timeout_ms: None,
+                    ..Default::default()
                 }),
                 event_stream,
                 cx,
@@ -1428,4 +1571,72 @@ mod tests {
             "unexpected terminal result: {result}"
         );
     }
+
+    #[test]
+    fn test_sandbox_approval_title_unsandboxed_wins() {
+        // `unsandboxed: true` skips the sandbox entirely, so the title should
+        // reflect that even when other flags are also set — they're moot.
+        assert_eq!(
+            sandbox_approval_title(true, true, true),
+            "Allow this command to run outside the sandbox?"
+        );
+        assert_eq!(
+            sandbox_approval_title(false, false, true),
+            "Allow this command to run outside the sandbox?"
+        );
+    }
+
+    #[test]
+    fn test_sandbox_approval_title_per_permission_flags() {
+        assert_eq!(
+            sandbox_approval_title(true, true, false),
+            "Allow network access and arbitrary filesystem writes?"
+        );
+        assert_eq!(
+            sandbox_approval_title(true, false, false),
+            "Allow network access?"
+        );
+        assert_eq!(
+            sandbox_approval_title(false, true, false),
+            "Allow arbitrary filesystem writes?"
+        );
+    }
+
+    #[test]
+    fn test_input_schema_includes_sandbox_flags() {
+        // The model only sees these fields when the sandboxing prompt
+        // section is rendered, but they're always present in the schema so
+        // input validation doesn't reject them when sent. Guard against
+        // accidentally renaming or removing them.
+        let schema = serde_json::to_string(&schemars::schema_for!(TerminalToolInput))
+            .expect("input schema should serialize");
+        assert!(
+            schema.contains("allow_network"),
+            "schema should advertise allow_network: {schema}"
+        );
+        assert!(
+            schema.contains("allow_fs_write"),
+            "schema should advertise allow_fs_write: {schema}"
+        );
+        assert!(
+            schema.contains("unsandboxed"),
+            "schema should advertise unsandboxed: {schema}"
+        );
+    }
+
+    #[test]
+    fn test_sandbox_flags_default_to_none_when_absent() {
+        // The model is expected to omit the sandbox fields entirely on most
+        // calls. Make sure deserialization doesn't reject the minimal
+        // payload and that the fields default to `None` (which the tool
+        // interprets as "no escalation requested").
+        let input: TerminalToolInput = serde_json::from_value(serde_json::json!({
+            "command": "echo hi",
+            "cd": ".",
+        }))
+        .expect("minimal input should deserialize");
+        assert_eq!(input.allow_network, None);
+        assert_eq!(input.allow_fs_write, None);
+        assert_eq!(input.unsandboxed, None);
+    }
 }

crates/agent/src/tools/tool_permissions.rs

@@ -9,9 +9,9 @@ use fs::Fs;
 use gpui::{App, Entity, Task, WeakEntity};
 use project::{Project, ProjectPath};
 use settings::Settings;
-use std::path::{Path, PathBuf};
+use std::path::{Component, Path, PathBuf};
 use std::sync::Arc;
-use util::paths::component_matches_ignore_ascii_case;
+use util::{normalize_path, paths::component_matches_ignore_ascii_case};
 
 pub enum SensitiveSettingsKind {
     Local,
@@ -116,25 +116,24 @@ fn is_within_any_worktree(canonical_path: &Path, canonical_worktree_roots: &[Pat
         .any(|root| canonical_path.starts_with(root))
 }
 
-/// If `path` is an absolute path under the global skills directory
-/// (`~/.agents/skills`), return the canonicalized absolute path. Returns
-/// `None` for any path that resolves outside the global skills tree, for
-/// relative paths, or if the skills directory itself can't be canonicalized
-/// (fail closed — better to refuse access than to compare against a
-/// non-canonical path).
+/// If `path` names `~/.agents/skills` or one of its descendants, return the
+/// canonicalized absolute path. Returns `None` for any path that resolves
+/// outside the global skills tree, for relative paths that don't start with
+/// `~`, or if the skills directory itself can't be canonicalized (fail closed
+/// — better to refuse access than to compare against a non-canonical path).
 ///
 /// This is the gate that lets `read_file` / `list_directory` reach into the
 /// global skills directory — which lives outside any worktree — without
 /// also opening up arbitrary external paths.
 pub async fn resolve_global_skill_path(path: &Path, fs: &dyn Fs) -> Option<PathBuf> {
-    if !path.is_absolute() {
-        return None;
-    }
+    let normalized_path = resolve_lexical_global_skill_path(path)?;
 
-    // Canonicalize both sides so symlinks and `..` segments can't sneak the
-    // path out of the skills tree (and so different but equivalent path
-    // representations match).
-    let canonical_path = fs.canonicalize(path).await.ok()?;
+    // Canonicalize both sides so symlinks can't sneak the path out of the
+    // skills tree (and so different but equivalent path representations
+    // match). The lexical check above intentionally runs first, so a
+    // symlinked `~/.agents/skills` root can't broaden the allowlist to every
+    // path under the symlink target.
+    let canonical_path = fs.canonicalize(&normalized_path).await.ok()?;
     let canonical_skills_dir = canonical_global_skills_dir(fs).await?;
 
     if canonical_path.starts_with(&canonical_skills_dir) {
@@ -144,6 +143,112 @@ pub async fn resolve_global_skill_path(path: &Path, fs: &dyn Fs) -> Option<PathB
     }
 }
 
+fn expand_home_prefix(path: &Path) -> Option<PathBuf> {
+    if path.is_absolute() {
+        return Some(path.to_path_buf());
+    }
+
+    let mut components = path.components();
+    let first_component = components.next()?;
+    if !matches!(first_component, Component::Normal(component) if component == "~") {
+        return None;
+    }
+
+    let mut expanded = paths::home_dir().clone();
+    for component in components {
+        match component {
+            Component::Normal(component) => expanded.push(component),
+            Component::CurDir => {}
+            Component::ParentDir => expanded.push(".."),
+            Component::Prefix(_) | Component::RootDir => return None,
+        }
+    }
+    Some(expanded)
+}
+
+fn expand_and_normalize_absolute_path(path: &Path) -> Option<PathBuf> {
+    let expanded_path = expand_home_prefix(path)?;
+    let normalized_path = normalize_path(&expanded_path);
+    normalized_path.is_absolute().then_some(normalized_path)
+}
+
+fn resolve_lexical_global_skill_path(path: &Path) -> Option<PathBuf> {
+    let normalized_path = expand_and_normalize_absolute_path(path)?;
+    let normalized_skills_dir = normalize_path(&agent_skills::global_skills_dir());
+
+    normalized_path
+        .starts_with(&normalized_skills_dir)
+        .then_some(normalized_path)
+}
+
+/// If `path` names `~/.agents/skills` or one of its descendants, return a
+/// canonical absolute path for it. Unlike [`resolve_global_skill_path`], the
+/// target path may or may not exist on disk yet — the caller decides whether
+/// to read, write, or create it. Returns `None` for any other path, including
+/// siblings of the global skills tree or paths that would escape it with `..`
+/// or symlinks.
+pub async fn resolve_creatable_global_skill_path(path: &Path, fs: &dyn Fs) -> Option<PathBuf> {
+    let normalized_path = resolve_lexical_global_skill_path(path)?;
+    let canonical_path = canonicalize_with_ancestors(&normalized_path, fs).await?;
+    let canonical_skills_dir = canonical_global_skills_dir(fs).await?;
+
+    if canonical_path.starts_with(&canonical_skills_dir) {
+        Some(canonical_path)
+    } else {
+        None
+    }
+}
+
+fn is_strict_descendant(path: &Path, ancestor: &Path) -> bool {
+    path != ancestor && path.starts_with(ancestor)
+}
+
+/// Returns whether `path` resolves to the global agent skills directory itself.
+///
+/// This is used by destructive tools to reject operations targeting the root
+/// `~/.agents/skills` directory while still allowing operations on individual
+/// skills or resources beneath it.
+pub async fn resolves_to_global_skills_dir(path: &Path, fs: &dyn Fs) -> bool {
+    let Some(normalized_path) = resolve_lexical_global_skill_path(path) else {
+        return false;
+    };
+    let Some(canonical_path) = canonicalize_with_ancestors(&normalized_path, fs).await else {
+        return false;
+    };
+    let Some(canonical_skills_dir) = canonical_global_skills_dir(fs).await else {
+        return false;
+    };
+
+    canonical_path == canonical_skills_dir
+}
+
+/// Filters a previously-resolved global skills path so that callers which
+/// must never act on `~/.agents/skills` itself (move, delete) only see paths
+/// that point strictly below the skills root.
+async fn restrict_to_skill_descendant(
+    canonical_path: Option<PathBuf>,
+    fs: &dyn Fs,
+) -> Option<PathBuf> {
+    let canonical_path = canonical_path?;
+    let canonical_skills_dir = canonical_global_skills_dir(fs).await?;
+    is_strict_descendant(&canonical_path, &canonical_skills_dir).then_some(canonical_path)
+}
+
+/// Like [`resolve_global_skill_path`], but only succeeds for paths strictly
+/// below `~/.agents/skills`, not the skills directory itself.
+pub async fn resolve_global_skill_descendant_path(path: &Path, fs: &dyn Fs) -> Option<PathBuf> {
+    restrict_to_skill_descendant(resolve_global_skill_path(path, fs).await, fs).await
+}
+
+/// Like [`resolve_creatable_global_skill_path`], but only succeeds for paths
+/// strictly below `~/.agents/skills`, not the skills directory itself.
+pub async fn resolve_creatable_global_skill_descendant_path(
+    path: &Path,
+    fs: &dyn Fs,
+) -> Option<PathBuf> {
+    restrict_to_skill_descendant(resolve_creatable_global_skill_path(path, fs).await, fs).await
+}
+
 /// Returns the kind of sensitive settings or agent skills location this path targets, if any:
 /// either inside a `.zed/` local-settings directory, inside `.agents/skills/`, or inside
 /// the global config dir.
@@ -773,6 +878,189 @@ mod tests {
         roots
     }
 
+    #[gpui::test]
+    async fn test_resolve_creatable_global_skill_path_allows_tilde_path(cx: &mut TestAppContext) {
+        init_test(cx);
+
+        let fs = FakeFs::new(cx.executor());
+        let input_path = PathBuf::from("~")
+            .join(".agents")
+            .join("skills")
+            .join("my-skill");
+        let expected_path = agent_skills::global_skills_dir().join("my-skill");
+
+        let resolved = resolve_creatable_global_skill_path(&input_path, fs.as_ref())
+            .await
+            .expect("global skill path should resolve");
+
+        assert_eq!(resolved, expected_path);
+    }
+
+    #[gpui::test]
+    async fn test_resolve_global_skill_path_allows_tilde_path(cx: &mut TestAppContext) {
+        init_test(cx);
+
+        let fs = FakeFs::new(cx.executor());
+        let skill_file = agent_skills::global_skills_dir()
+            .join("my-skill")
+            .join("SKILL.md");
+        fs.insert_tree(
+            skill_file
+                .parent()
+                .expect("skill file should have a parent"),
+            json!({ "SKILL.md": "---\nname: my-skill\ndescription: test\n---" }),
+        )
+        .await;
+
+        let input_path = PathBuf::from("~")
+            .join(".agents")
+            .join("skills")
+            .join("my-skill")
+            .join("SKILL.md");
+        let resolved = resolve_global_skill_path(&input_path, fs.as_ref())
+            .await
+            .expect("global skill file should resolve");
+
+        assert_eq!(resolved, skill_file);
+    }
+
+    #[gpui::test]
+    async fn test_resolve_creatable_global_skill_path_rejects_other_home_paths(
+        cx: &mut TestAppContext,
+    ) {
+        init_test(cx);
+
+        let fs = FakeFs::new(cx.executor());
+        let sibling_path = PathBuf::from("~").join(".agents").join("not-skills");
+        let escaped_path = PathBuf::from("~")
+            .join(".agents")
+            .join("skills")
+            .join("..")
+            .join("not-skills");
+
+        assert!(
+            resolve_creatable_global_skill_path(&sibling_path, fs.as_ref())
+                .await
+                .is_none()
+        );
+        assert!(
+            resolve_creatable_global_skill_path(&escaped_path, fs.as_ref())
+                .await
+                .is_none()
+        );
+    }
+
+    #[gpui::test]
+    async fn test_resolve_creatable_global_skill_path_rejects_symlink_escape(
+        cx: &mut TestAppContext,
+    ) {
+        init_test(cx);
+
+        let fs = FakeFs::new(cx.executor());
+        let skills_dir = agent_skills::global_skills_dir();
+        fs.create_dir(&skills_dir)
+            .await
+            .expect("global skills directory should be created");
+        fs.create_dir(path!("/external").as_ref())
+            .await
+            .expect("external directory should be created");
+        fs.create_symlink(&skills_dir.join("link"), PathBuf::from(path!("/external")))
+            .await
+            .expect("symlink should be created");
+
+        let escaped_path = PathBuf::from("~")
+            .join(".agents")
+            .join("skills")
+            .join("link")
+            .join("new-dir");
+
+        assert!(
+            resolve_creatable_global_skill_path(&escaped_path, fs.as_ref())
+                .await
+                .is_none()
+        );
+    }
+
+    #[gpui::test]
+    async fn test_global_skill_path_resolvers_reject_absolute_paths_when_skills_dir_is_symlink_to_root(
+        cx: &mut TestAppContext,
+    ) {
+        init_test(cx);
+
+        let fs = FakeFs::new(cx.executor());
+        fs.insert_tree(paths::home_dir(), json!({ ".agents": {} }))
+            .await;
+        fs.insert_tree(path!("/tmp"), json!({ "outside.txt": "outside" }))
+            .await;
+
+        let skills_dir = agent_skills::global_skills_dir();
+        fs.create_symlink(&skills_dir, PathBuf::from(path!("/")))
+            .await
+            .expect("global skills directory should be symlinked to root");
+
+        let outside_path = PathBuf::from(path!("/tmp/outside.txt"));
+        assert!(
+            resolve_global_skill_path(&outside_path, fs.as_ref())
+                .await
+                .is_none(),
+            "existing absolute paths outside the lexical global skills tree should not resolve",
+        );
+        assert!(
+            resolve_creatable_global_skill_path(&outside_path, fs.as_ref())
+                .await
+                .is_none(),
+            "creatable absolute paths outside the lexical global skills tree should not resolve",
+        );
+
+        let traversed_path = PathBuf::from("~")
+            .join(".agents")
+            .join("skills")
+            .join("..")
+            .join("outside");
+        assert!(
+            resolve_creatable_global_skill_path(&traversed_path, fs.as_ref())
+                .await
+                .is_none(),
+            "paths that normalize outside the lexical global skills tree should not resolve",
+        );
+    }
+
+    #[gpui::test]
+    async fn test_global_skill_path_resolvers_reject_absolute_paths_when_skills_dir_is_symlink_to_home(
+        cx: &mut TestAppContext,
+    ) {
+        init_test(cx);
+
+        let fs = FakeFs::new(cx.executor());
+        fs.insert_tree(
+            paths::home_dir(),
+            json!({
+                ".agents": {},
+                "outside.txt": "outside",
+            }),
+        )
+        .await;
+
+        let skills_dir = agent_skills::global_skills_dir();
+        fs.create_symlink(&skills_dir, paths::home_dir().clone())
+            .await
+            .expect("global skills directory should be symlinked to home");
+
+        let outside_path = paths::home_dir().join("outside.txt");
+        assert!(
+            resolve_global_skill_path(&outside_path, fs.as_ref())
+                .await
+                .is_none(),
+            "existing absolute paths outside the lexical global skills tree should not resolve",
+        );
+        assert!(
+            resolve_creatable_global_skill_path(&outside_path, fs.as_ref())
+                .await
+                .is_none(),
+            "creatable absolute paths outside the lexical global skills tree should not resolve",
+        );
+    }
+
     #[gpui::test]
     async fn test_resolve_project_path_safe_for_normal_files(cx: &mut TestAppContext) {
         init_test(cx);

crates/agent/src/tools/update_title_tool.rs

@@ -0,0 +1,140 @@
+use crate::{AgentTool, Thread, ToolCallEventStream, ToolInput};
+use agent_client_protocol::schema as acp;
+use gpui::{App, SharedString, Task, WeakEntity};
+use schemars::JsonSchema;
+use serde::{Deserialize, Serialize};
+use std::sync::Arc;
+
+const MAX_TITLE_LEN: usize = 200;
+
+/// Updates the current session title.
+#[derive(Debug, Clone, Serialize, Deserialize, JsonSchema, PartialEq, Eq)]
+pub struct UpdateTitleToolInput {
+    /// A concise, human-readable title for the current session.
+    pub title: String,
+}
+
+pub struct UpdateTitleTool {
+    thread: WeakEntity<Thread>,
+}
+
+impl UpdateTitleTool {
+    pub fn new(thread: WeakEntity<Thread>) -> Self {
+        Self { thread }
+    }
+
+    pub(crate) fn title_for_input(
+        input: Result<UpdateTitleToolInput, serde_json::Value>,
+    ) -> SharedString {
+        let Ok(input) = input else {
+            return "Update title".into();
+        };
+        let Ok(title) = normalize_title(&input.title) else {
+            return "Update title".into();
+        };
+        format!("Update title: {title}").into()
+    }
+}
+
+impl AgentTool for UpdateTitleTool {
+    type Input = UpdateTitleToolInput;
+    type Output = String;
+
+    const NAME: &'static str = "update_title";
+
+    fn kind() -> acp::ToolKind {
+        acp::ToolKind::Think
+    }
+
+    fn initial_title(
+        &self,
+        input: Result<Self::Input, serde_json::Value>,
+        _cx: &mut App,
+    ) -> SharedString {
+        Self::title_for_input(input)
+    }
+
+    fn run(
+        self: Arc<Self>,
+        input: ToolInput<Self::Input>,
+        _event_stream: ToolCallEventStream,
+        cx: &mut App,
+    ) -> Task<Result<Self::Output, Self::Output>> {
+        let thread = self.thread.clone();
+        cx.spawn(async move |cx| {
+            let input = input.recv().await.map_err(|error| error.to_string())?;
+            let title = normalize_title(&input.title)?;
+
+            thread
+                .update(cx, |thread, cx| {
+                    thread.set_title(title.into(), cx);
+                })
+                .map_err(|error| error.to_string())?;
+
+            Ok("Session title updated".to_string())
+        })
+    }
+
+    fn replay(
+        &self,
+        input: Self::Input,
+        _output: Self::Output,
+        event_stream: ToolCallEventStream,
+        cx: &mut App,
+    ) -> anyhow::Result<()> {
+        let title = self.initial_title(Ok(input), cx).to_string();
+        event_stream.update_fields(acp::ToolCallUpdateFields::new().title(title));
+        Ok(())
+    }
+}
+
+fn normalize_title(title: &str) -> Result<String, String> {
+    let title = title.lines().next().unwrap_or("").trim();
+    if title.is_empty() {
+        return Err("Title cannot be empty".to_string());
+    }
+    Ok(util::truncate_and_trailoff(title, MAX_TITLE_LEN))
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use gpui::TestAppContext;
+
+    #[test]
+    fn test_normalize_title() {
+        assert_eq!(
+            normalize_title("  Title from model\nignored").unwrap(),
+            "Title from model"
+        );
+        assert!(normalize_title(" \nignored").is_err());
+    }
+
+    #[gpui::test]
+    async fn test_initial_title(cx: &mut TestAppContext) {
+        let tool = UpdateTitleTool::new(WeakEntity::new_invalid());
+
+        let title = cx.update(|cx| {
+            tool.initial_title(
+                Ok(UpdateTitleToolInput {
+                    title: "Investigate title updates".to_string(),
+                }),
+                cx,
+            )
+        });
+        assert_eq!(
+            title,
+            SharedString::from("Update title: Investigate title updates")
+        );
+
+        let title = cx.update(|cx| {
+            tool.initial_title(
+                Ok(UpdateTitleToolInput {
+                    title: " ".to_string(),
+                }),
+                cx,
+            )
+        });
+        assert_eq!(title, SharedString::from("Update title"));
+    }
+}

crates/agent/src/tools/write_file_tool.rs

@@ -22,11 +22,13 @@ const DEFAULT_UI_TEXT: &str = "Writing file";
 /// To make granular edits to an existing file, prefer the `edit_file` tool instead.
 ///
 /// Before using this tool, verify the directory path is correct (only applicable when creating new files). Use the `list_directory` tool to verify the parent directory exists and is the correct location
+///
+/// The only supported path outside the project is `~/.agents/skills` or a descendant, for global agent skills.
 #[derive(Clone, Debug, Serialize, Deserialize, JsonSchema)]
 pub struct WriteFileToolInput {
     /// The full path of the file to create or overwrite in the project.
     ///
-    /// WARNING: When specifying which file path need changing, you MUST start each path with one of the project's root directories.
+    /// WARNING: When specifying which file path need changing, you MUST start each path with one of the project's root directories, unless it's a global agent skill under `~/.agents/skills`.
     ///
     /// The following examples assume we have two root directories in the project:
     /// - /a/b/backend
@@ -41,6 +43,10 @@ pub struct WriteFileToolInput {
     /// <example>
     /// `frontend/db.js`
     /// </example>
+    ///
+    /// <example>
+    /// To create or overwrite a global agent skill file, you may provide a path under `~/.agents/skills`, such as `~/.agents/skills/my-skill/SKILL.md`.
+    /// </example>
     pub path: PathBuf,
 
     /// The entire content for the file.
@@ -237,6 +243,7 @@ impl AgentTool for WriteFileTool {
             run_session(
                 self.process_streaming_writes(&mut input, &event_stream, cx)
                     .await,
+                &event_stream,
                 cx,
             )
             .await
@@ -272,7 +279,7 @@ mod tests {
     use prompt_store::ProjectContext;
     use serde_json::json;
     use settings::{Settings, SettingsStore};
-    use std::sync::Arc;
+    use std::{path::PathBuf, sync::Arc};
     use util::path;
     use util::rel_path::{RelPath, rel_path};
 
@@ -327,6 +334,62 @@ mod tests {
         assert_eq!(*old_text, "old content");
     }
 
+    #[gpui::test]
+    async fn test_streaming_write_global_skill_file(cx: &mut TestAppContext) {
+        init_test(cx);
+
+        let fs = project::FakeFs::new(cx.executor());
+        fs.insert_tree(path!("/root"), json!({})).await;
+        let skill_dir = agent_skills::global_skills_dir().join("my-skill");
+        fs.insert_tree(&skill_dir, json!({})).await;
+        let (write_tool, _project, _action_log, fs, _thread) =
+            setup_test_with_fs(cx, fs, &[path!("/root").as_ref()]).await;
+
+        let input_path = PathBuf::from("~")
+            .join(".agents")
+            .join("skills")
+            .join("my-skill")
+            .join("SKILL.md");
+        let skill_file = agent_skills::global_skills_dir()
+            .join("my-skill")
+            .join("SKILL.md");
+
+        let (event_stream, mut event_rx) = ToolCallEventStream::test();
+        let task = cx.update(|cx| {
+            write_tool.clone().run(
+                ToolInput::resolved(WriteFileToolInput {
+                    path: input_path,
+                    content: "# My Skill\n".into(),
+                }),
+                event_stream,
+                cx,
+            )
+        });
+
+        event_rx.expect_update_fields().await;
+        let auth = event_rx.expect_authorization().await;
+        let title = auth.tool_call.fields.title.as_deref().unwrap_or("");
+        assert!(
+            title.contains("agent skills"),
+            "Authorization title should mention agent skills, got: {title}",
+        );
+        auth.response
+            .send(acp_thread::SelectedPermissionOutcome::new(
+                acp::PermissionOptionId::new("allow"),
+                acp::PermissionOptionKind::AllowOnce,
+            ))
+            .expect("authorization response should send");
+
+        let EditSessionOutput::Success { new_text, .. } = task.await.unwrap() else {
+            panic!("expected success");
+        };
+        assert_eq!(new_text, "# My Skill\n");
+        assert_eq!(
+            fs.load(&skill_file).await.unwrap().replace("\r\n", "\n"),
+            "# My Skill\n"
+        );
+    }
+
     #[gpui::test]
     async fn test_streaming_path_completeness_heuristic(cx: &mut TestAppContext) {
         let (write_tool, _project, _action_log, _fs, _thread) =
@@ -998,7 +1061,8 @@ mod tests {
 
         cx.run_until_parked();
 
-        let changed = action_log.read_with(cx, |log, cx| log.changed_buffers(cx));
+        let changed =
+            action_log.read_with(cx, |log, cx| log.changed_buffers(cx).collect::<Vec<_>>());
         assert!(
             !changed.is_empty(),
             "action_log.changed_buffers() should be non-empty after streaming write, \
@@ -1070,7 +1134,8 @@ mod tests {
         );
 
         // Reject all edits — this should delete the newly created file
-        let changed = action_log.read_with(cx, |log, cx| log.changed_buffers(cx));
+        let changed =
+            action_log.read_with(cx, |log, cx| log.changed_buffers(cx).collect::<Vec<_>>());
         assert!(
             !changed.is_empty(),
             "action_log should track the created file as changed"

crates/agent_servers/src/custom.rs

@@ -88,22 +88,18 @@ impl AgentServer for CustomAgentServer {
         let config_id = config_id.to_string();
         let value_id = value_id.to_string();
 
-        update_settings_file(fs, cx, move |settings, cx| {
+        update_settings_file(fs, cx, move |settings, _cx| {
             let settings = settings
                 .agent_servers
                 .get_or_insert_default()
                 .entry(agent_id.0.to_string())
-                .or_insert_with(|| default_settings_for_agent(agent_id, cx));
+                .or_insert_with(default_settings_for_agent);
 
             match settings {
                 settings::CustomAgentServerSettings::Custom {
                     favorite_config_option_values,
                     ..
                 }
-                | settings::CustomAgentServerSettings::Extension {
-                    favorite_config_option_values,
-                    ..
-                }
                 | settings::CustomAgentServerSettings::Registry {
                     favorite_config_option_values,
                     ..
@@ -129,16 +125,15 @@ impl AgentServer for CustomAgentServer {
 
     fn set_default_mode(&self, mode_id: Option<acp::SessionModeId>, fs: Arc<dyn Fs>, cx: &mut App) {
         let agent_id = self.agent_id();
-        update_settings_file(fs, cx, move |settings, cx| {
+        update_settings_file(fs, cx, move |settings, _cx| {
             let settings = settings
                 .agent_servers
                 .get_or_insert_default()
                 .entry(agent_id.0.to_string())
-                .or_insert_with(|| default_settings_for_agent(agent_id, cx));
+                .or_insert_with(default_settings_for_agent);
 
             match settings {
                 settings::CustomAgentServerSettings::Custom { default_mode, .. }
-                | settings::CustomAgentServerSettings::Extension { default_mode, .. }
                 | settings::CustomAgentServerSettings::Registry { default_mode, .. } => {
                     *default_mode = mode_id.map(|m| m.to_string());
                 }
@@ -161,16 +156,15 @@ impl AgentServer for CustomAgentServer {
 
     fn set_default_model(&self, model_id: Option<acp::ModelId>, fs: Arc<dyn Fs>, cx: &mut App) {
         let agent_id = self.agent_id();
-        update_settings_file(fs, cx, move |settings, cx| {
+        update_settings_file(fs, cx, move |settings, _cx| {
             let settings = settings
                 .agent_servers
                 .get_or_insert_default()
                 .entry(agent_id.0.to_string())
-                .or_insert_with(|| default_settings_for_agent(agent_id, cx));
+                .or_insert_with(default_settings_for_agent);
 
             match settings {
                 settings::CustomAgentServerSettings::Custom { default_model, .. }
-                | settings::CustomAgentServerSettings::Extension { default_model, .. }
                 | settings::CustomAgentServerSettings::Registry { default_model, .. } => {
                     *default_model = model_id.map(|m| m.to_string());
                 }
@@ -205,20 +199,17 @@ impl AgentServer for CustomAgentServer {
         cx: &App,
     ) {
         let agent_id = self.agent_id();
-        update_settings_file(fs, cx, move |settings, cx| {
+        update_settings_file(fs, cx, move |settings, _cx| {
             let settings = settings
                 .agent_servers
                 .get_or_insert_default()
                 .entry(agent_id.0.to_string())
-                .or_insert_with(|| default_settings_for_agent(agent_id, cx));
+                .or_insert_with(default_settings_for_agent);
 
             let favorite_models = match settings {
                 settings::CustomAgentServerSettings::Custom {
                     favorite_models, ..
                 }
-                | settings::CustomAgentServerSettings::Extension {
-                    favorite_models, ..
-                }
                 | settings::CustomAgentServerSettings::Registry {
                     favorite_models, ..
                 } => favorite_models,
@@ -258,22 +249,18 @@ impl AgentServer for CustomAgentServer {
         let agent_id = self.agent_id();
         let config_id = config_id.to_string();
         let value_id = value_id.map(|s| s.to_string());
-        update_settings_file(fs, cx, move |settings, cx| {
+        update_settings_file(fs, cx, move |settings, _cx| {
             let settings = settings
                 .agent_servers
                 .get_or_insert_default()
                 .entry(agent_id.0.to_string())
-                .or_insert_with(|| default_settings_for_agent(agent_id, cx));
+                .or_insert_with(default_settings_for_agent);
 
             match settings {
                 settings::CustomAgentServerSettings::Custom {
                     default_config_options,
                     ..
                 }
-                | settings::CustomAgentServerSettings::Extension {
-                    default_config_options,
-                    ..
-                }
                 | settings::CustomAgentServerSettings::Registry {
                     default_config_options,
                     ..
@@ -307,10 +294,6 @@ impl AgentServer for CustomAgentServer {
                         default_config_options,
                         ..
                     }
-                    | project::agent_server_store::CustomAgentServerSettings::Extension {
-                        default_config_options,
-                        ..
-                    }
                     | project::agent_server_store::CustomAgentServerSettings::Registry {
                         default_config_options,
                         ..
@@ -422,28 +405,14 @@ fn is_registry_agent(agent_id: impl Into<AgentId>, cx: &App) -> bool {
     is_in_registry || is_settings_registry
 }
 
-fn default_settings_for_agent(
-    agent_id: impl Into<AgentId>,
-    cx: &App,
-) -> settings::CustomAgentServerSettings {
-    if is_registry_agent(agent_id, cx) {
-        settings::CustomAgentServerSettings::Registry {
-            default_model: None,
-            default_mode: None,
-            env: Default::default(),
-            favorite_models: Vec::new(),
-            default_config_options: Default::default(),
-            favorite_config_option_values: Default::default(),
-        }
-    } else {
-        settings::CustomAgentServerSettings::Extension {
-            default_model: None,
-            default_mode: None,
-            env: Default::default(),
-            favorite_models: Vec::new(),
-            default_config_options: Default::default(),
-            favorite_config_option_values: Default::default(),
-        }
+fn default_settings_for_agent() -> settings::CustomAgentServerSettings {
+    settings::CustomAgentServerSettings::Registry {
+        default_model: None,
+        default_mode: None,
+        env: Default::default(),
+        favorite_models: Vec::new(),
+        default_config_options: Default::default(),
+        favorite_config_option_values: Default::default(),
     }
 }
 
@@ -547,53 +516,4 @@ mod tests {
             assert!(is_registry_agent("agent-from-settings", cx));
         });
     }
-
-    #[gpui::test]
-    fn test_agent_with_extension_settings_type_is_not_registry(cx: &mut TestAppContext) {
-        init_test(cx);
-        set_agent_server_settings(
-            cx,
-            vec![(
-                "my-extension-agent",
-                settings::CustomAgentServerSettings::Extension {
-                    env: HashMap::default(),
-                    default_mode: None,
-                    default_model: None,
-                    favorite_models: Vec::new(),
-                    default_config_options: HashMap::default(),
-                    favorite_config_option_values: HashMap::default(),
-                },
-            )],
-        );
-        cx.update(|cx| {
-            assert!(!is_registry_agent("my-extension-agent", cx));
-        });
-    }
-
-    #[gpui::test]
-    fn test_default_settings_for_extension_agent(cx: &mut TestAppContext) {
-        init_test(cx);
-        cx.update(|cx| {
-            assert!(matches!(
-                default_settings_for_agent("some-extension-agent", cx),
-                settings::CustomAgentServerSettings::Extension { .. }
-            ));
-        });
-    }
-
-    #[gpui::test]
-    fn test_default_settings_for_agent_in_registry(cx: &mut TestAppContext) {
-        init_test(cx);
-        init_registry_with_agents(cx, &["new-registry-agent"]);
-        cx.update(|cx| {
-            assert!(matches!(
-                default_settings_for_agent("new-registry-agent", cx),
-                settings::CustomAgentServerSettings::Registry { .. }
-            ));
-            assert!(matches!(
-                default_settings_for_agent("not-in-registry", cx),
-                settings::CustomAgentServerSettings::Extension { .. }
-            ));
-        });
-    }
 }

crates/agent_settings/Cargo.toml

@@ -21,6 +21,7 @@ futures.workspace = true
 gpui.workspace = true
 language_model.workspace = true
 log.workspace = true
+paths.workspace = true
 project.workspace = true
 regex.workspace = true
 schemars.workspace = true
@@ -31,7 +32,6 @@ util.workspace = true
 [dev-dependencies]
 fs.workspace = true
 gpui = { workspace = true, features = ["test-support"] }
-paths.workspace = true
 
 serde_json_lenient.workspace = true
 serde_json.workspace = true