Merge branch 'main' into fix-worktree-drag-reorder

Cargo.lock

@@ -3571,7 +3571,6 @@ version = "0.1.0"
 dependencies = [
  "anyhow",
  "async-channel 2.5.0",
- "async-process",
  "async-trait",
  "base64 0.22.1",
  "collections",
@@ -5397,8 +5396,8 @@ dependencies = [
 name = "edit_prediction_metrics"
 version = "0.1.0"
 dependencies = [
+ "imara-diff",
  "indoc",
- "language",
  "pretty_assertions",
  "serde",
  "serde_json",
@@ -22395,7 +22394,7 @@ dependencies = [
 
 [[package]]
 name = "zed"
-version = "1.2.0"
+version = "1.3.0"
 dependencies = [
  "acp_thread",
  "acp_tools",

assets/keymaps/default-linux.json

@@ -1499,6 +1499,7 @@
     "use_key_equivalents": true,
     "bindings": {
       "ctrl-shift-backspace": "branch_picker::DeleteBranch",
+      "ctrl-alt-shift-backspace": "branch_picker::ForceDeleteBranch",
       "ctrl-shift-i": "branch_picker::FilterRemotes",
     },
   },

assets/keymaps/default-macos.json

@@ -1552,6 +1552,7 @@
     "use_key_equivalents": true,
     "bindings": {
       "cmd-shift-backspace": "branch_picker::DeleteBranch",
+      "cmd-alt-shift-backspace": "branch_picker::ForceDeleteBranch",
       "cmd-shift-i": "branch_picker::FilterRemotes",
     },
   },

assets/keymaps/default-windows.json

@@ -1479,6 +1479,7 @@
     "use_key_equivalents": true,
     "bindings": {
       "ctrl-shift-backspace": "branch_picker::DeleteBranch",
+      "ctrl-alt-shift-backspace": "branch_picker::ForceDeleteBranch",
       "ctrl-shift-i": "branch_picker::FilterRemotes",
     },
   },

assets/keymaps/vim.json

@@ -527,6 +527,7 @@
       "space w d": "pane::SplitDown", // not a helix default
 
       // Space mode
+      "space b": "tab_switcher::ToggleAll",
       "space f": "file_finder::Toggle",
       "space k": "editor::Hover",
       "space s": "outline::Toggle",

assets/settings/default.json

@@ -1110,6 +1110,7 @@
           "diagnostics": true,
           "apply_code_action": true,
           "edit_file": true,
+          "write_file": true,
           "fetch": true,
           "find_path": true,
           "find_references": true,

crates/acp_thread/src/acp_thread.rs

@@ -2294,10 +2294,6 @@ impl AcpThread {
                     this.project
                         .update(cx, |project, cx| project.set_agent_location(None, cx));
                 }
-                let Ok(response) = response else {
-                    // tx dropped, just return
-                    return Ok(None);
-                };
 
                 let is_same_turn = this
                     .running_turn
@@ -2306,11 +2302,18 @@ impl AcpThread {
 
                 // If the user submitted a follow up message, running_turn might
                 // already point to a different turn. Therefore we only want to
-                // take the task if it's the same turn.
+                // take the task if it's the same turn. We do this before the
+                // dropped-tx guard below so the panel exits its generating
+                // state even when the send_task is cancelled before tx.send().
                 if is_same_turn {
                     this.running_turn.take();
                 }
 
+                let Ok(response) = response else {
+                    // tx dropped, just return
+                    return Ok(None);
+                };
+
                 match response {
                     Ok(r) => {
                         Self::flush_streaming_text(&mut this.streaming_text_buffer, cx);
@@ -5517,4 +5520,63 @@ mod tests {
             );
         });
     }
+
+    /// Regression test: if the inner send_task is cancelled before it can
+    /// fire `tx.send(...)` (e.g. because the underlying future was dropped),
+    /// the outer task observes `rx.await` returning `Err(Cancelled)` and
+    /// must still clear `running_turn` so the panel transitions out of
+    /// `Generating`. Without this, the agent thread is wedged in the
+    /// loading state until Zed restarts.
+    #[gpui::test]
+    async fn test_running_turn_cleared_when_send_task_dropped(cx: &mut TestAppContext) {
+        init_test(cx);
+
+        let fs = FakeFs::new(cx.executor());
+        let project = Project::test(fs, [], cx).await;
+
+        // Handler hangs forever so the spawn at run_turn is parked inside
+        // `f(this, cx).await` with `tx` still alive but unsent.
+        let connection = Rc::new(FakeAgentConnection::new().on_user_message(
+            |_params, _thread, _cx| {
+                async move { futures::future::pending::<Result<acp::PromptResponse>>().await }
+                    .boxed_local()
+            },
+        ));
+
+        let thread = cx
+            .update(|cx| {
+                connection.new_session(project, PathList::new(&[Path::new(path!("/test"))]), cx)
+            })
+            .await
+            .unwrap();
+
+        let request = thread.update(cx, |thread, cx| thread.send_raw("hello", cx));
+        cx.run_until_parked();
+
+        assert_eq!(
+            thread.read_with(cx, |t, _| t.status()),
+            ThreadStatus::Generating,
+            "thread should be generating while the handler is parked"
+        );
+
+        // Replace the in-flight send_task with a no-op. Dropping the original
+        // Task cancels its inner future, which drops `tx` without ever calling
+        // `tx.send(...)`. This mirrors the production scenario where the
+        // send_task future is cancelled before completion.
+        thread.update(cx, |thread, _| {
+            thread.running_turn.as_mut().unwrap().send_task = Task::ready(());
+        });
+
+        let result = request.await;
+        assert!(
+            matches!(result, Ok(None)),
+            "outer task should resolve to Ok(None) on dropped tx, got {result:?}"
+        );
+
+        assert_eq!(
+            thread.read_with(cx, |t, _| t.status()),
+            ThreadStatus::Idle,
+            "running_turn must be cleared even when tx was dropped without send"
+        );
+    }
 }

crates/acp_thread/src/connection.rs

@@ -49,6 +49,10 @@ pub trait AgentConnection {
 
     fn telemetry_id(&self) -> SharedString;
 
+    fn agent_version(&self) -> Option<SharedString> {
+        None
+    }
+
     fn new_session(
         self: Rc<Self>,
         project: Entity<Project>,

crates/agent/src/tests/mod.rs

@@ -6062,9 +6062,7 @@ async fn test_edit_file_tool_deny_rule_blocks_edit(cx: &mut TestAppContext) {
         tool.run(
             ToolInput::resolved(crate::EditFileToolInput {
                 path: "root/sensitive_config.txt".into(),
-                mode: crate::EditFileMode::Edit,
-                content: None,
-                edits: Some(vec![]),
+                edits: vec![],
             }),
             event_stream,
             cx,
@@ -6496,9 +6494,7 @@ async fn test_edit_file_tool_allow_rule_skips_confirmation(cx: &mut TestAppConte
         tool.run(
             ToolInput::resolved(crate::EditFileToolInput {
                 path: "root/README.md".into(),
-                mode: crate::EditFileMode::Edit,
-                content: None,
-                edits: Some(vec![]),
+                edits: vec![],
             }),
             event_stream,
             cx,
@@ -6568,9 +6564,7 @@ async fn test_edit_file_tool_allow_still_prompts_for_local_settings(cx: &mut Tes
         tool.run(
             ToolInput::resolved(crate::EditFileToolInput {
                 path: "root/.zed/settings.json".into(),
-                mode: crate::EditFileMode::Edit,
-                content: None,
-                edits: Some(vec![]),
+                edits: vec![],
             }),
             event_stream,
             cx,

crates/agent/src/thread.rs

@@ -4,7 +4,7 @@ use crate::{
     FindPathTool, FindReferencesTool, GetCodeActionsTool, GoToDefinitionTool, GrepTool,
     ListDirectoryTool, MovePathTool, NowTool, OpenTool, ProjectSnapshot, ReadFileTool, RenameTool,
     RestoreFileFromDiskTool, SaveFileTool, SpawnAgentTool, SystemPromptTemplate, Template,
-    Templates, TerminalTool, ToolPermissionDecision, UpdatePlanTool, WebSearchTool,
+    Templates, TerminalTool, ToolPermissionDecision, UpdatePlanTool, WebSearchTool, WriteFileTool,
     decide_permission_from_settings,
 };
 use acp_thread::{MentionUri, UserMessageId};
@@ -822,6 +822,7 @@ impl ToolPermissionContext {
             } else if tool_name == CopyPathTool::NAME
                 || tool_name == MovePathTool::NAME
                 || tool_name == EditFileTool::NAME
+                || tool_name == WriteFileTool::NAME
                 || tool_name == DeletePathTool::NAME
                 || tool_name == CreateDirectoryTool::NAME
                 || tool_name == SaveFileTool::NAME
@@ -1544,6 +1545,12 @@ impl Thread {
             self.action_log.clone(),
         ));
         self.add_tool(EditFileTool::new(
+            self.project.clone(),
+            cx.weak_entity(),
+            self.action_log.clone(),
+            language_registry.clone(),
+        ));
+        self.add_tool(WriteFileTool::new(
             self.project.clone(),
             cx.weak_entity(),
             self.action_log.clone(),

crates/agent/src/tools.rs

@@ -5,6 +5,7 @@ mod create_directory_tool;
 mod delete_path_tool;
 mod diagnostics_tool;
 mod edit_file_tool;
+mod edit_session;
 #[cfg(all(test, feature = "unit-eval"))]
 mod evals;
 mod fetch_tool;
@@ -27,6 +28,7 @@ mod terminal_tool;
 mod tool_permissions;
 mod update_plan_tool;
 mod web_search_tool;
+mod write_file_tool;
 
 use crate::AgentTool;
 use language_model::{LanguageModelRequestTool, LanguageModelToolSchemaFormat};
@@ -85,6 +87,7 @@ pub use terminal_tool::*;
 pub use tool_permissions::*;
 pub use update_plan_tool::*;
 pub use web_search_tool::*;
+pub use write_file_tool::*;
 
 macro_rules! tools {
     ($($tool:ty),* $(,)?) => {
@@ -179,4 +182,5 @@ tools! {
     TerminalTool,
     UpdatePlanTool,
     WebSearchTool,
+    WriteFileTool,
 }

crates/agent/src/tools/create_directory_tool.rs

@@ -54,7 +54,7 @@ impl AgentTool for CreateDirectoryTool {
     const NAME: &'static str = "create_directory";
 
     fn kind() -> acp::ToolKind {
-        acp::ToolKind::Read
+        acp::ToolKind::Edit
     }
 
     fn initial_title(

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

@@ -1,6 +1,6 @@
 use smallvec::SmallVec;
 
-use crate::{Edit, PartialEdit};
+use super::{Edit, PartialEdit};
 
 /// Events emitted by `StreamingParser` for edit-mode input.
 #[derive(Debug, PartialEq, Eq)]

crates/agent/src/tools/evals.rs

@@ -2,3 +2,5 @@
 mod edit_file;
 #[cfg(all(test, feature = "unit-eval"))]
 mod terminal_tool;
+#[cfg(all(test, feature = "unit-eval"))]
+mod write_file;

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

@@ -1,8 +1,7 @@
 use crate::tools::edit_file_tool::*;
 use crate::{
-    AgentTool, ContextServerRegistry, EditFileTool, GrepTool, GrepToolInput, ListDirectoryTool,
-    ListDirectoryToolInput, ReadFileTool, ReadFileToolInput, Template, Templates, Thread,
-    ToolCallEventStream, ToolInput,
+    AgentTool, ContextServerRegistry, EditFileTool, GrepTool, GrepToolInput, ReadFileTool,
+    ReadFileToolInput, Template, Templates, Thread, ToolCallEventStream, ToolInput,
 };
 use Role::*;
 use anyhow::{Context as _, Result};
@@ -124,20 +123,6 @@ impl EvalAssertion {
         EvalAssertion(Arc::new(f))
     }
 
-    fn assert_eq(expected: impl Into<String>) -> Self {
-        let expected = expected.into();
-        Self::new(async move |sample, _judge, _cx| {
-            Ok(EvalAssertionOutcome {
-                score: if strip_empty_lines(&sample.text_after) == strip_empty_lines(&expected) {
-                    100
-                } else {
-                    0
-                },
-                message: None,
-            })
-        })
-    }
-
     fn assert_diff_any(expected_diffs: Vec<impl Into<String>>) -> Self {
         let expected_diffs: Vec<String> = expected_diffs.into_iter().map(Into::into).collect();
         Self::new(async move |sample, _judge, _cx| {
@@ -1499,46 +1484,3 @@ fn eval_add_overwrite_test() {
         ))
     });
 }
-
-#[test]
-#[cfg_attr(not(feature = "unit-eval"), ignore)]
-fn eval_create_empty_file() {
-    let input_file_path = "root/TODO3";
-    let input_file_content = None;
-    let expected_output_content = String::new();
-
-    eval_utils::eval(100, 0.99, eval_utils::NoProcessor, move || {
-        run_eval(EvalInput::new(
-            vec![
-                message(User, [text("Create a second empty todo file ")]),
-                message(
-                    Assistant,
-                    [
-                        text(indoc::formatdoc! {"
-                            I'll help you create a second empty todo file.
-                            First, let me examine the project structure to see if there's already a todo file, which will help me determine the appropriate name and location for the second one.
-                            "}),
-                        tool_use(
-                            "toolu_01GAF8TtsgpjKxCr8fgQLDgR",
-                            ListDirectoryTool::NAME,
-                            ListDirectoryToolInput {
-                                path: "root".to_string(),
-                            },
-                        ),
-                    ],
-                ),
-                message(
-                    User,
-                    [tool_result(
-                        "toolu_01GAF8TtsgpjKxCr8fgQLDgR",
-                        ListDirectoryTool::NAME,
-                        "root/TODO\nroot/TODO2\nroot/new.txt\n",
-                    )],
-                ),
-            ],
-            input_file_path,
-            input_file_content.clone(),
-            EvalAssertion::assert_eq(expected_output_content.clone()),
-        ))
-    });
-}

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

@@ -0,0 +1,561 @@
+use crate::{
+    AgentTool, ContextServerRegistry, ListDirectoryTool, ListDirectoryToolInput, Template,
+    Templates, Thread, ToolCallEventStream, ToolInput, WriteFileTool, WriteFileToolInput,
+};
+use Role::*;
+use anyhow::{Context as _, Result};
+use client::{Client, RefreshLlmTokenListener, UserStore};
+use fs::FakeFs;
+use futures::StreamExt;
+use gpui::{AppContext as _, AsyncApp, Entity, TestAppContext, UpdateGlobal as _};
+use http_client::StatusCode;
+use language::language_settings::FormatOnSave;
+use language_model::{
+    LanguageModel, LanguageModelCompletionError, LanguageModelCompletionEvent,
+    LanguageModelRegistry, LanguageModelRequest, LanguageModelRequestMessage,
+    LanguageModelToolResult, LanguageModelToolResultContent, LanguageModelToolUse,
+    LanguageModelToolUseId, MessageContent, Role, SelectedModel,
+};
+use project::Project;
+use prompt_store::{ProjectContext, WorktreeContext};
+use rand::prelude::*;
+use reqwest_client::ReqwestClient;
+use serde::Serialize;
+use settings::SettingsStore;
+use std::{
+    fmt::{self, Display},
+    path::{Path, PathBuf},
+    str::FromStr,
+    sync::Arc,
+    time::Duration,
+};
+use util::path;
+
+#[derive(Clone)]
+struct EvalInput {
+    conversation: Vec<LanguageModelRequestMessage>,
+    input_file_path: PathBuf,
+    input_content: Option<String>,
+    expected_output_content: String,
+}
+
+impl EvalInput {
+    fn new(
+        conversation: Vec<LanguageModelRequestMessage>,
+        input_file_path: impl Into<PathBuf>,
+        input_content: Option<String>,
+        expected_output_content: String,
+    ) -> Self {
+        Self {
+            conversation,
+            input_file_path: input_file_path.into(),
+            input_content,
+            expected_output_content,
+        }
+    }
+}
+
+struct WriteEvalOutput {
+    tool_input: WriteFileToolInput,
+    text_after: String,
+}
+
+impl Display for WriteEvalOutput {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        writeln!(f, "Tool Input:\n{:#?}", self.tool_input)?;
+        writeln!(f, "Text After:\n{}", self.text_after)?;
+        Ok(())
+    }
+}
+
+struct WriteToolTest {
+    fs: Arc<FakeFs>,
+    project: Entity<Project>,
+    model: Arc<dyn LanguageModel>,
+    model_thinking_effort: Option<String>,
+}
+
+impl WriteToolTest {
+    async fn new(cx: &mut TestAppContext) -> Self {
+        cx.executor().allow_parking();
+
+        let fs = FakeFs::new(cx.executor());
+        cx.update(|cx| {
+            let settings_store = SettingsStore::test(cx);
+            cx.set_global(settings_store);
+            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.format_on_save =
+                        Some(FormatOnSave::Off);
+                });
+            });
+
+            gpui_tokio::init(cx);
+            let http_client = Arc::new(ReqwestClient::user_agent("agent tests").unwrap());
+            cx.set_http_client(http_client);
+            let client = Client::production(cx);
+            let user_store = cx.new(|cx| UserStore::new(client.clone(), cx));
+            language_model::init(cx);
+            RefreshLlmTokenListener::register(client.clone(), user_store.clone(), cx);
+            language_models::init(user_store, client, cx);
+        });
+
+        fs.insert_tree("/root", serde_json::json!({})).await;
+        let project = Project::test(fs.clone(), [path!("/root").as_ref()], cx).await;
+        let agent_model = SelectedModel::from_str(
+            &std::env::var("ZED_AGENT_MODEL")
+                .unwrap_or("anthropic/claude-sonnet-4-6-latest".into()),
+        )
+        .unwrap();
+
+        let authenticate_provider_tasks = cx.update(|cx| {
+            LanguageModelRegistry::global(cx).update(cx, |registry, cx| {
+                registry
+                    .providers()
+                    .iter()
+                    .map(|p| p.authenticate(cx))
+                    .collect::<Vec<_>>()
+            })
+        });
+        let model = cx
+            .update(|cx| {
+                cx.spawn(async move |cx| {
+                    futures::future::join_all(authenticate_provider_tasks).await;
+                    Self::load_model(&agent_model, cx).await.unwrap()
+                })
+            })
+            .await;
+
+        let model_thinking_effort = model
+            .default_effort_level()
+            .map(|effort_level| effort_level.value.to_string());
+
+        Self {
+            fs,
+            project,
+            model,
+            model_thinking_effort,
+        }
+    }
+
+    async fn load_model(
+        selected_model: &SelectedModel,
+        cx: &mut AsyncApp,
+    ) -> Result<Arc<dyn LanguageModel>> {
+        cx.update(|cx| {
+            let registry = LanguageModelRegistry::read_global(cx);
+            let provider = registry
+                .provider(&selected_model.provider)
+                .expect("Provider not found");
+            provider.authenticate(cx)
+        })
+        .await?;
+        Ok(cx.update(|cx| {
+            let models = LanguageModelRegistry::read_global(cx);
+            models
+                .available_models(cx)
+                .find(|model| {
+                    model.provider_id() == selected_model.provider
+                        && model.id() == selected_model.model
+                })
+                .unwrap_or_else(|| panic!("Model {} not found", selected_model.model.0))
+        }))
+    }
+
+    async fn eval(&self, mut eval: EvalInput, cx: &mut TestAppContext) -> Result<WriteEvalOutput> {
+        eval.conversation
+            .last_mut()
+            .context("Conversation must not be empty")?
+            .cache = true;
+
+        if let Some(input_content) = eval.input_content.as_deref() {
+            let abs_path = Path::new("/root").join(
+                eval.input_file_path
+                    .strip_prefix("root")
+                    .unwrap_or(&eval.input_file_path),
+            );
+            self.fs.insert_file(&abs_path, input_content.into()).await;
+            cx.run_until_parked();
+        }
+
+        let tools = crate::built_in_tools().collect::<Vec<_>>();
+
+        let system_prompt = {
+            let worktrees = vec![WorktreeContext {
+                root_name: "root".to_string(),
+                abs_path: Path::new("/path/to/root").into(),
+                rules_file: None,
+            }];
+            let project_context = ProjectContext::new(worktrees, Vec::default());
+            let tool_names = tools
+                .iter()
+                .map(|tool| tool.name.clone().into())
+                .collect::<Vec<_>>();
+            let template = crate::SystemPromptTemplate {
+                project: &project_context,
+                available_tools: tool_names,
+                model_name: None,
+            };
+            let templates = Templates::new();
+            template.render(&templates)?
+        };
+
+        let messages = [LanguageModelRequestMessage {
+            role: Role::System,
+            content: vec![MessageContent::Text(system_prompt)],
+            cache: true,
+            reasoning_details: None,
+        }]
+        .into_iter()
+        .chain(eval.conversation)
+        .collect::<Vec<_>>();
+
+        let request = LanguageModelRequest {
+            messages,
+            tools,
+            thinking_allowed: true,
+            thinking_effort: self.model_thinking_effort.clone(),
+            ..Default::default()
+        };
+
+        let tool_input =
+            retry_on_rate_limit(async || self.extract_tool_use(request.clone(), cx).await).await?;
+
+        let language_registry = self
+            .project
+            .read_with(cx, |project, _cx| project.languages().clone());
+
+        let context_server_registry = cx
+            .new(|cx| ContextServerRegistry::new(self.project.read(cx).context_server_store(), cx));
+        let thread = cx.new(|cx| {
+            Thread::new(
+                self.project.clone(),
+                cx.new(|_cx| ProjectContext::default()),
+                context_server_registry,
+                Templates::new(),
+                Some(self.model.clone()),
+                cx,
+            )
+        });
+        let action_log = thread.read_with(cx, |thread, _| thread.action_log().clone());
+
+        let tool = Arc::new(WriteFileTool::new(
+            self.project.clone(),
+            thread.downgrade(),
+            action_log,
+            language_registry,
+        ));
+
+        let result = cx
+            .update(|cx| {
+                tool.clone().run(
+                    ToolInput::resolved(tool_input.clone()),
+                    ToolCallEventStream::test().0,
+                    cx,
+                )
+            })
+            .await;
+
+        let output = match result {
+            Ok(output) => output,
+            Err(output) => anyhow::bail!("Tool returned error: {}", output),
+        };
+
+        let crate::EditFileToolOutput::Success { new_text, .. } = &output else {
+            anyhow::bail!("Tool returned error output: {}", output);
+        };
+
+        if tool_input.path != eval.input_file_path {
+            anyhow::bail!(
+                "Tool path mismatch. Expected {:?}, got {:?}",
+                eval.input_file_path,
+                tool_input.path,
+            );
+        }
+
+        if new_text != &eval.expected_output_content {
+            anyhow::bail!(
+                "Output content mismatch. Expected {:?}, got {:?}",
+                eval.expected_output_content,
+                new_text,
+            );
+        }
+
+        Ok(WriteEvalOutput {
+            tool_input,
+            text_after: new_text.clone(),
+        })
+    }
+
+    async fn extract_tool_use(
+        &self,
+        request: LanguageModelRequest,
+        cx: &mut TestAppContext,
+    ) -> Result<WriteFileToolInput> {
+        let model = self.model.clone();
+        let events = cx
+            .update(|cx| {
+                let async_cx = cx.to_async();
+                cx.foreground_executor()
+                    .spawn(async move { model.stream_completion(request, &async_cx).await })
+            })
+            .await
+            .map_err(|err| anyhow::anyhow!("completion error: {}", err))?;
+
+        let mut streamed_text = String::new();
+        let mut stop_reason = None;
+        let mut parse_errors = Vec::new();
+
+        let mut events = events.fuse();
+        while let Some(event) = events.next().await {
+            match event {
+                Ok(LanguageModelCompletionEvent::ToolUse(tool_use))
+                    if tool_use.is_input_complete
+                        && tool_use.name.as_ref() == WriteFileTool::NAME =>
+                {
+                    let input: WriteFileToolInput = serde_json::from_value(tool_use.input)
+                        .context("Failed to parse tool input as WriteFileToolInput")?;
+                    return Ok(input);
+                }
+                Ok(LanguageModelCompletionEvent::Text(text)) => {
+                    if streamed_text.len() < 2_000 {
+                        streamed_text.push_str(&text);
+                    }
+                }
+                Ok(LanguageModelCompletionEvent::Stop(reason)) => {
+                    stop_reason = Some(reason);
+                }
+                Ok(LanguageModelCompletionEvent::ToolUseJsonParseError {
+                    tool_name,
+                    raw_input,
+                    json_parse_error,
+                    ..
+                }) if tool_name.as_ref() == WriteFileTool::NAME => {
+                    parse_errors.push(format!("{json_parse_error}\nRaw input:\n{raw_input:?}"));
+                }
+                Err(err) => return Err(anyhow::anyhow!("completion error: {}", err)),
+                _ => {}
+            }
+        }
+
+        let streamed_text = streamed_text.trim();
+        let streamed_text_suffix = if streamed_text.is_empty() {
+            String::new()
+        } else {
+            format!("\nStreamed text:\n{streamed_text}")
+        };
+        let stop_reason_suffix = stop_reason
+            .map(|reason| format!("\nStop reason: {reason:?}"))
+            .unwrap_or_default();
+        let parse_errors_suffix = if parse_errors.is_empty() {
+            String::new()
+        } else {
+            format!("\nTool parse errors:\n{}", parse_errors.join("\n"))
+        };
+
+        anyhow::bail!(
+            "Stream ended without a write_file tool use{stop_reason_suffix}{parse_errors_suffix}{streamed_text_suffix}"
+        )
+    }
+}
+
+fn run_eval(eval: EvalInput) -> eval_utils::EvalOutput<()> {
+    let dispatcher = gpui::TestDispatcher::new(rand::random());
+    let mut cx = TestAppContext::build(dispatcher, None);
+    let foreground_executor = cx.foreground_executor().clone();
+    let result = foreground_executor.block_test(async {
+        let test = WriteToolTest::new(&mut cx).await;
+        let result = test.eval(eval, &mut cx).await;
+        drop(test);
+        cx.run_until_parked();
+        result
+    });
+    cx.quit();
+    match result {
+        Ok(output) => eval_utils::EvalOutput {
+            data: output.to_string(),
+            outcome: eval_utils::OutcomeKind::Passed,
+            metadata: (),
+        },
+        Err(err) => eval_utils::EvalOutput {
+            data: format!("{err:?}"),
+            outcome: eval_utils::OutcomeKind::Error,
+            metadata: (),
+        },
+    }
+}
+
+fn message(
+    role: Role,
+    content: impl IntoIterator<Item = MessageContent>,
+) -> LanguageModelRequestMessage {
+    LanguageModelRequestMessage {
+        role,
+        content: content.into_iter().collect(),
+        cache: false,
+        reasoning_details: None,
+    }
+}
+
+fn text(text: impl Into<String>) -> MessageContent {
+    MessageContent::Text(text.into())
+}
+
+fn tool_use(
+    id: impl Into<Arc<str>>,
+    name: impl Into<Arc<str>>,
+    input: impl Serialize,
+) -> MessageContent {
+    MessageContent::ToolUse(LanguageModelToolUse {
+        id: LanguageModelToolUseId::from(id.into()),
+        name: name.into(),
+        raw_input: serde_json::to_string_pretty(&input).unwrap(),
+        input: serde_json::to_value(input).unwrap(),
+        is_input_complete: true,
+        thought_signature: None,
+    })
+}
+
+fn tool_result(
+    id: impl Into<Arc<str>>,
+    name: impl Into<Arc<str>>,
+    result: impl Into<Arc<str>>,
+) -> MessageContent {
+    MessageContent::ToolResult(LanguageModelToolResult {
+        tool_use_id: LanguageModelToolUseId::from(id.into()),
+        tool_name: name.into(),
+        is_error: false,
+        content: vec![LanguageModelToolResultContent::Text(result.into())],
+        output: None,
+    })
+}
+
+async fn retry_on_rate_limit<R>(mut request: impl AsyncFnMut() -> Result<R>) -> Result<R> {
+    const MAX_RETRIES: usize = 20;
+    let mut attempt = 0;
+
+    loop {
+        attempt += 1;
+        let response = request().await;
+
+        if attempt >= MAX_RETRIES {
+            return response;
+        }
+
+        let retry_delay = match &response {
+            Ok(_) => None,
+            Err(err) => match err.downcast_ref::<LanguageModelCompletionError>() {
+                Some(err) => match &err {
+                    LanguageModelCompletionError::RateLimitExceeded { retry_after, .. }
+                    | LanguageModelCompletionError::ServerOverloaded { retry_after, .. } => {
+                        Some(retry_after.unwrap_or(Duration::from_secs(5)))
+                    }
+                    LanguageModelCompletionError::UpstreamProviderError {
+                        status,
+                        retry_after,
+                        ..
+                    } => {
+                        let should_retry = matches!(
+                            *status,
+                            StatusCode::TOO_MANY_REQUESTS | StatusCode::SERVICE_UNAVAILABLE
+                        ) || status.as_u16() == 529;
+
+                        if should_retry {
+                            Some(retry_after.unwrap_or(Duration::from_secs(5)))
+                        } else {
+                            None
+                        }
+                    }
+                    LanguageModelCompletionError::ApiReadResponseError { .. }
+                    | LanguageModelCompletionError::ApiInternalServerError { .. }
+                    | LanguageModelCompletionError::HttpSend { .. } => {
+                        Some(Duration::from_secs(2_u64.pow((attempt - 1) as u32).min(30)))
+                    }
+                    _ => None,
+                },
+                _ => None,
+            },
+        };
+
+        if let Some(retry_after) = retry_delay {
+            let jitter = retry_after.mul_f64(rand::rng().random_range(0.0..1.0));
+            eprintln!("Attempt #{attempt}: Retry after {retry_after:?} + jitter of {jitter:?}");
+            #[allow(clippy::disallowed_methods)]
+            async_io::Timer::after(retry_after + jitter).await;
+        } else {
+            return response;
+        }
+    }
+}
+
+#[test]
+#[cfg_attr(not(feature = "unit-eval"), ignore)]
+fn eval_create_file() {
+    let input_file_path = "root/TODO3";
+    let expected_output_content = "todo".to_string();
+
+    eval_utils::eval(100, 1., eval_utils::NoProcessor, move || {
+        run_eval(EvalInput::new(
+            vec![
+                message(
+                    User,
+                    [text("Create a third todo file. Write 'todo' inside it.")],
+                ),
+                message(
+                    Assistant,
+                    [
+                        text(indoc::formatdoc! {"
+                            I'll help you create a third empty todo file.
+                            First, let me examine the project structure to see if there's already a todo file, which will help me determine the appropriate name and location for the second one.
+                            "}),
+                        tool_use(
+                            "toolu_01GAF8TtsgpjKxCr8fgQLDgR",
+                            ListDirectoryTool::NAME,
+                            ListDirectoryToolInput {
+                                path: "root".to_string(),
+                            },
+                        ),
+                    ],
+                ),
+                message(
+                    User,
+                    [tool_result(
+                        "toolu_01GAF8TtsgpjKxCr8fgQLDgR",
+                        ListDirectoryTool::NAME,
+                        "root/TODO\nroot/TODO2\nroot/new.txt\n",
+                    )],
+                ),
+            ],
+            input_file_path,
+            None,
+            expected_output_content.clone(),
+        ))
+    });
+}
+
+#[test]
+#[cfg_attr(not(feature = "unit-eval"), ignore)]
+fn eval_overwrite_file() {
+    let input_file_path = "root/notes.txt";
+    let input_file_content = "old notes\nkeep nothing\n".to_string();
+    let expected_output_content = "new notes".to_string();
+
+    eval_utils::eval(100, 1., eval_utils::NoProcessor, move || {
+        run_eval(EvalInput::new(
+            vec![message(
+                User,
+                [text(indoc::formatdoc! {"
+                    Overwrite `{input_file_path}` so that its complete contents are exactly: 'new notes'
+                "})],
+            )],
+            input_file_path,
+            Some(input_file_content.clone()),
+            expected_output_content.clone(),
+        ))
+    });
+}

crates/agent/src/tools/read_file_tool.rs

@@ -184,6 +184,13 @@ impl AgentTool for ReadFileTool {
                 anyhow::Ok(())
             }).map_err(tool_content_err)?;
 
+            if fs.is_dir(&abs_path).await {
+                return Err(tool_content_err(format!(
+                    "{} is a directory, not a file. Use the list_directory tool to explore directory contents.",
+                    &input.path
+                )));
+            }
+
             if let Some(canonical_target) = &symlink_canonical_target {
                 let authorize = cx.update(|cx| {
                     authorize_symlink_access(
@@ -356,6 +363,39 @@ mod test {
     use std::sync::Arc;
     use util::path;
 
+    #[gpui::test]
+    async fn test_read_directory_path(cx: &mut TestAppContext) {
+        init_test(cx);
+
+        let fs = FakeFs::new(cx.executor());
+        fs.insert_tree(
+            path!("/root"),
+            json!({
+                "some_dir": {}
+            }),
+        )
+        .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, _) = ToolCallEventStream::test();
+
+        let result = cx
+            .update(|cx| {
+                let input = ReadFileToolInput {
+                    path: "root/some_dir".to_string(),
+                    start_line: None,
+                    end_line: None,
+                };
+                tool.run(ToolInput::resolved(input), event_stream, cx)
+            })
+            .await;
+        assert_eq!(
+            error_text(result.unwrap_err()),
+            "root/some_dir is a directory, not a file. Use the list_directory tool to explore directory contents."
+        );
+    }
+
     #[gpui::test]
     async fn test_read_nonexistent_file(cx: &mut TestAppContext) {
         init_test(cx);

crates/agent_servers/src/acp.rs

@@ -413,6 +413,7 @@ fn enqueue_notification<Notif>(
 pub struct AcpConnection {
     id: AgentId,
     telemetry_id: SharedString,
+    agent_version: Option<SharedString>,
     connection: ConnectionTo<Agent>,
     sessions: Rc<RefCell<HashMap<acp::SessionId, AcpSession>>>,
     pending_sessions: Rc<RefCell<HashMap<acp::SessionId, PendingAcpSession>>>,
@@ -900,12 +901,15 @@ impl AcpConnection {
             }
         });
 
-        let telemetry_id = response
-            .agent_info
+        let agent_info = response.agent_info;
+        let telemetry_id = agent_info
+            .as_ref()
             // Use the one the agent provides if we have one
-            .map(|info| info.name.into())
+            .map(|info| SharedString::from(info.name.clone()))
             // Otherwise, just use the name
             .unwrap_or_else(|| agent_id.0.clone());
+        let agent_version = agent_info
+            .and_then(|info| (!info.version.is_empty()).then(|| SharedString::from(info.version)));
 
         let session_list = if response
             .agent_capabilities
@@ -945,6 +949,7 @@ impl AcpConnection {
             agent_server_store,
             connection,
             telemetry_id,
+            agent_version,
             sessions,
             pending_sessions: Rc::new(RefCell::new(HashMap::default())),
             agent_capabilities: response.agent_capabilities,
@@ -978,6 +983,7 @@ impl AcpConnection {
         Self {
             id: AgentId::new("test"),
             telemetry_id: "test".into(),
+            agent_version: None,
             connection,
             sessions,
             pending_sessions: Rc::new(RefCell::new(HashMap::default())),
@@ -1319,6 +1325,10 @@ impl AgentConnection for AcpConnection {
         self.telemetry_id.clone()
     }
 
+    fn agent_version(&self) -> Option<SharedString> {
+        self.agent_version.clone()
+    }
+
     fn new_session(
         self: Rc<Self>,
         project: Entity<Project>,
@@ -1984,6 +1994,10 @@ pub mod test_support {
             self.inner.telemetry_id()
         }
 
+        fn agent_version(&self) -> Option<SharedString> {
+            self.inner.agent_version()
+        }
+
         fn new_session(
             self: Rc<Self>,
             project: Entity<Project>,

crates/agent_ui/src/agent_configuration.rs

@@ -1135,10 +1135,13 @@ impl AgentConfiguration {
             id: agent_server_name.clone(),
         };
 
-        let connection_status = self
-            .agent_connection_store
-            .read(cx)
-            .connection_status(&agent, cx);
+        let (connection_status, running_version) = {
+            let connection_store = self.agent_connection_store.read(cx);
+            (
+                connection_store.connection_status(&agent, cx),
+                connection_store.agent_version(&agent, cx),
+            )
+        };
 
         let restart_button = matches!(
             connection_status,
@@ -1252,6 +1255,7 @@ impl AgentConfiguration {
 
         AiSettingItem::new(id, display_name, status, source_kind)
             .icon(icon)
+            .when_some(running_version, |this, version| this.detail_label(version))
             .when_some(restart_button, |this, button| this.action(button))
             .when_some(uninstall_button, |this, button| this.action(button))
     }

crates/agent_ui/src/agent_connection_store.rs

@@ -97,6 +97,13 @@ impl AgentConnectionStore {
             .unwrap_or(AgentConnectionStatus::Disconnected)
     }
 
+    pub fn agent_version(&self, key: &Agent, cx: &App) -> Option<SharedString> {
+        match self.entries.get(key)?.read(cx) {
+            AgentConnectionEntry::Connected(state) => state.connection.agent_version(),
+            AgentConnectionEntry::Connecting { .. } | AgentConnectionEntry::Error { .. } => None,
+        }
+    }
+
     pub fn active_acp_connections(&self, cx: &App) -> Vec<ActiveAcpConnection> {
         self.entries
             .values()

crates/agent_ui/src/message_editor.rs

@@ -677,7 +677,7 @@ impl MessageEditor {
     }
 
     pub fn is_empty(&self, cx: &App) -> bool {
-        self.editor.read(cx).is_empty(cx)
+        self.editor.read(cx).text(cx).trim().is_empty()
     }
 
     pub fn is_completions_menu_visible(&self, cx: &App) -> bool {

crates/collab/migrations.sqlite/20221109000000_test_schema.sql

@@ -21,8 +21,8 @@ CREATE UNIQUE INDEX "index_users_on_github_user_id" ON "users" ("github_user_id"
 
 CREATE TABLE "contacts" (
     "id" INTEGER PRIMARY KEY AUTOINCREMENT,
-    "user_id_a" INTEGER REFERENCES users (id) NOT NULL,
-    "user_id_b" INTEGER REFERENCES users (id) NOT NULL,
+    "user_id_a" INTEGER NOT NULL,
+    "user_id_b" INTEGER NOT NULL,
     "a_to_b" BOOLEAN NOT NULL,
     "should_notify" BOOLEAN NOT NULL,
     "accepted" BOOLEAN NOT NULL
@@ -44,7 +44,7 @@ CREATE UNIQUE INDEX "index_rooms_on_channel_id" ON "rooms" ("channel_id");
 CREATE TABLE "projects" (
     "id" INTEGER PRIMARY KEY AUTOINCREMENT,
     "room_id" INTEGER REFERENCES rooms (id) ON DELETE CASCADE,
-    "host_user_id" INTEGER REFERENCES users (id),
+    "host_user_id" INTEGER,
     "host_connection_id" INTEGER,
     "host_connection_server_id" INTEGER REFERENCES servers (id) ON DELETE CASCADE,
     "unregistered" BOOLEAN NOT NULL DEFAULT FALSE,
@@ -208,14 +208,14 @@ CREATE UNIQUE INDEX "index_project_collaborators_on_project_id_connection_id_and
 CREATE TABLE "room_participants" (
     "id" INTEGER PRIMARY KEY AUTOINCREMENT,
     "room_id" INTEGER NOT NULL REFERENCES rooms (id),
-    "user_id" INTEGER NOT NULL REFERENCES users (id),
+    "user_id" INTEGER NOT NULL,
     "answering_connection_id" INTEGER,
     "answering_connection_server_id" INTEGER REFERENCES servers (id) ON DELETE CASCADE,
     "answering_connection_lost" BOOLEAN NOT NULL,
     "location_kind" INTEGER,
     "location_project_id" INTEGER,
     "initial_project_id" INTEGER,
-    "calling_user_id" INTEGER NOT NULL REFERENCES users (id),
+    "calling_user_id" INTEGER NOT NULL,
     "calling_connection_id" INTEGER NOT NULL,
     "calling_connection_server_id" INTEGER REFERENCES servers (id) ON DELETE SET NULL,
     "participant_index" INTEGER,
@@ -279,7 +279,7 @@ CREATE INDEX "index_channels_on_parent_path_and_order" ON "channels" ("parent_pa
 
 CREATE TABLE IF NOT EXISTS "channel_chat_participants" (
     "id" INTEGER PRIMARY KEY AUTOINCREMENT,
-    "user_id" INTEGER NOT NULL REFERENCES users (id),
+    "user_id" INTEGER NOT NULL,
     "channel_id" INTEGER NOT NULL REFERENCES channels (id) ON DELETE CASCADE,
     "connection_id" INTEGER NOT NULL,
     "connection_server_id" INTEGER NOT NULL REFERENCES servers (id) ON DELETE CASCADE
@@ -290,7 +290,7 @@ CREATE INDEX "index_channel_chat_participants_on_channel_id" ON "channel_chat_pa
 CREATE TABLE "channel_members" (
     "id" INTEGER PRIMARY KEY AUTOINCREMENT,
     "channel_id" INTEGER NOT NULL REFERENCES channels (id) ON DELETE CASCADE,
-    "user_id" INTEGER NOT NULL REFERENCES users (id) ON DELETE CASCADE,
+    "user_id" INTEGER NOT NULL,
     "role" VARCHAR NOT NULL,
     "accepted" BOOLEAN NOT NULL DEFAULT false,
     "updated_at" TIMESTAMP NOT NULL DEFAULT now
@@ -332,7 +332,7 @@ CREATE TABLE "channel_buffer_collaborators" (
     "connection_id" INTEGER NOT NULL,
     "connection_server_id" INTEGER NOT NULL REFERENCES servers (id) ON DELETE CASCADE,
     "connection_lost" BOOLEAN NOT NULL DEFAULT false,
-    "user_id" INTEGER NOT NULL REFERENCES users (id) ON DELETE CASCADE,
+    "user_id" INTEGER NOT NULL,
     "replica_id" INTEGER NOT NULL
 );
 
@@ -351,7 +351,7 @@ CREATE UNIQUE INDEX "index_channel_buffer_collaborators_on_channel_id_connection
 );
 
 CREATE TABLE "observed_buffer_edits" (
-    "user_id" INTEGER NOT NULL REFERENCES users (id) ON DELETE CASCADE,
+    "user_id" INTEGER NOT NULL,
     "buffer_id" INTEGER NOT NULL REFERENCES buffers (id) ON DELETE CASCADE,
     "epoch" INTEGER NOT NULL,
     "lamport_timestamp" INTEGER NOT NULL,
@@ -371,7 +371,7 @@ CREATE UNIQUE INDEX "index_notification_kinds_on_name" ON "notification_kinds" (
 CREATE TABLE "notifications" (
     "id" INTEGER PRIMARY KEY AUTOINCREMENT,
     "created_at" TIMESTAMP NOT NULL default CURRENT_TIMESTAMP,
-    "recipient_id" INTEGER NOT NULL REFERENCES users (id) ON DELETE CASCADE,
+    "recipient_id" INTEGER NOT NULL,
     "kind" INTEGER NOT NULL REFERENCES notification_kinds (id),
     "entity_id" INTEGER,
     "content" TEXT,
@@ -382,7 +382,7 @@ CREATE TABLE "notifications" (
 CREATE INDEX "index_notifications_on_recipient_id_is_read_kind_entity_id" ON "notifications" ("recipient_id", "is_read", "kind", "entity_id");
 
 CREATE TABLE contributors (
-    user_id INTEGER REFERENCES users (id),
+    user_id INTEGER,
     signed_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
     PRIMARY KEY (user_id)
 );
@@ -437,7 +437,7 @@ CREATE INDEX "index_breakpoints_on_project_id" ON "breakpoints" ("project_id");
 
 CREATE TABLE IF NOT EXISTS "shared_threads" (
     "id" TEXT PRIMARY KEY NOT NULL,
-    "user_id" INTEGER NOT NULL REFERENCES users (id) ON DELETE CASCADE,
+    "user_id" INTEGER NOT NULL,
     "title" VARCHAR(512) NOT NULL,
     "data" BLOB NOT NULL,
     "created_at" TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,

crates/collab/src/db/queries/channels.rs

@@ -684,6 +684,26 @@ impl Database {
         .await
     }
 
+    /// Returns the channel memberships for the users with the specified IDs.
+    #[cfg(feature = "test-support")]
+    pub async fn get_channel_memberships_for_user_ids(
+        &self,
+        channel: &Channel,
+        ids: Vec<UserId>,
+    ) -> Result<Vec<channel_member::Model>> {
+        self.transaction(|tx| async {
+            let tx = tx;
+            let members = channel_member::Entity::find()
+                .filter(channel_member::Column::ChannelId.eq(channel.id))
+                .filter(channel_member::Column::UserId.is_in(ids.iter().copied()))
+                .all(&*tx)
+                .await?;
+
+            Ok(members)
+        })
+        .await
+    }
+
     /// Returns the details for the specified channel member.
     pub async fn get_channel_participant_details(
         &self,

crates/collab/src/db/tables/user.rs

@@ -25,6 +25,8 @@ impl From<Model> for crate::entities::User {
         crate::entities::User {
             id: user.id,
             github_login: user.github_login,
+            github_user_id: user.github_user_id,
+            name: user.name,
             admin: user.admin,
             connected_once: user.connected_once,
         }

crates/collab/src/entities/user.rs

@@ -4,6 +4,8 @@ use crate::db::UserId;
 pub struct User {
     pub id: UserId,
     pub github_login: String,
+    pub github_user_id: i32,
+    pub name: Option<String>,
     pub admin: bool,
     pub connected_once: bool,
 }

crates/collab/src/lib.rs

@@ -6,6 +6,7 @@ pub mod env;
 pub mod executor;
 pub mod rpc;
 pub mod seed;
+pub mod services;
 
 use anyhow::Context as _;
 use aws_config::{BehaviorVersion, Region};
@@ -19,6 +20,8 @@ use serde::Deserialize;
 use std::{path::PathBuf, sync::Arc};
 use util::ResultExt;
 
+use crate::services::{DatabaseUserService, UserService};
+
 pub const VERSION: &str = env!("CARGO_PKG_VERSION");
 pub const REVISION: Option<&'static str> = option_env!("GITHUB_SHA");
 
@@ -216,6 +219,7 @@ pub struct AppState {
     pub blob_store_client: Option<aws_sdk_s3::Client>,
     pub executor: Executor,
     pub kinesis_client: Option<::aws_sdk_kinesis::Client>,
+    pub user_service: Arc<dyn UserService>,
     pub config: Config,
 }
 
@@ -259,6 +263,7 @@ impl AppState {
             } else {
                 None
             },
+            user_service: Arc::new(DatabaseUserService::new(db)),
             config,
         };
         Ok(Arc::new(this))

crates/collab/src/rpc.rs

@@ -2541,10 +2541,11 @@ async fn get_users(
         .map(UserId::from_proto)
         .collect();
     let users = session
-        .db()
-        .await
+        .app_state
+        .user_service
         .get_users_by_ids(user_ids)
-        .await?
+        .await?;
+    let users = users
         .into_iter()
         .map(|user| proto::User {
             id: user.id.to_proto(),
@@ -2567,13 +2568,19 @@ async fn fuzzy_search_users(
     let users = match query.len() {
         0 => vec![],
         1 | 2 => session
-            .db()
-            .await
+            .app_state
+            .user_service
             .get_user_by_github_login(&query)
             .await?
             .into_iter()
             .collect(),
-        _ => session.db().await.fuzzy_search_users(&query, 10).await?,
+        _ => {
+            session
+                .app_state
+                .user_service
+                .fuzzy_search_users(&query, 10)
+                .await?
+        }
     };
     let users = users
         .into_iter()
@@ -3163,13 +3170,11 @@ async fn get_channel_members(
 
     let channel = db.get_channel(channel_id, session.user_id()).await?;
 
-    let (members, users) = db
-        .get_channel_participant_details(&channel, &request.query, limit)
+    let (members, users) = session
+        .app_state
+        .user_service
+        .search_channel_members(&channel, &request.query, limit as u32)
         .await?;
-    let members = members
-        .into_iter()
-        .map(proto::ChannelMember::from)
-        .collect();
     let users = users.into_iter().map(proto::User::from).collect();
 
     response.send(proto::GetChannelMembersResponse { members, users })?;
@@ -4081,3 +4086,17 @@ where
         }
     }
 }
+
+impl From<User> for proto::User {
+    fn from(user: User) -> Self {
+        Self {
+            id: user.id.to_proto(),
+            avatar_url: format!(
+                "https://avatars.githubusercontent.com/u/{}?s=128&v=4",
+                user.github_user_id
+            ),
+            github_login: user.github_login,
+            name: user.name,
+        }
+    }
+}

crates/collab/src/services.rs

@@ -0,0 +1,3 @@
+mod user_service;
+
+pub use user_service::*;

crates/collab/src/services/user_service.rs

@@ -0,0 +1,243 @@
+use std::sync::Arc;
+
+use async_trait::async_trait;
+use rpc::proto;
+
+use crate::Result;
+use crate::db::{Channel, Database, UserId};
+use crate::entities::User;
+
+#[cfg(feature = "test-support")]
+pub use self::fake_user_service::*;
+
+#[async_trait]
+pub trait UserService: Send + Sync + 'static {
+    async fn get_users_by_ids(&self, ids: Vec<UserId>) -> Result<Vec<User>>;
+
+    async fn get_user_by_github_login(&self, github_login: &str) -> Result<Option<User>>;
+
+    async fn fuzzy_search_users(&self, query: &str, limit: u32) -> Result<Vec<User>>;
+
+    // NOTE: This method is only tangentially related to users, but we're putting it on the `UserService` to avoid
+    // introducing a separate service.
+    //
+    // We're also using the `proto::ChannelMember` representation in the return type, as we don't yet have a domain
+    // representation of a channel member (and doesn't seem necessary to introduce one, at this point).
+    async fn search_channel_members(
+        &self,
+        channel: &Channel,
+        query: &str,
+        limit: u32,
+    ) -> Result<(Vec<proto::ChannelMember>, Vec<User>)>;
+
+    #[cfg(feature = "test-support")]
+    fn as_fake(&self) -> Arc<FakeUserService> {
+        panic!("called as_fake on a real `UserService`");
+    }
+}
+
+/// A [`UserService`] implementation backed by the database.
+pub struct DatabaseUserService {
+    database: Arc<Database>,
+}
+
+impl DatabaseUserService {
+    pub fn new(database: Arc<Database>) -> Self {
+        Self { database }
+    }
+}
+
+#[async_trait]
+impl UserService for DatabaseUserService {
+    async fn get_users_by_ids(&self, ids: Vec<UserId>) -> Result<Vec<User>> {
+        let users = self.database.get_users_by_ids(ids).await?;
+
+        Ok(users.into_iter().map(User::from).collect())
+    }
+
+    async fn get_user_by_github_login(&self, github_login: &str) -> Result<Option<User>> {
+        let user = self.database.get_user_by_github_login(github_login).await?;
+
+        Ok(user.map(User::from))
+    }
+
+    async fn fuzzy_search_users(&self, query: &str, limit: u32) -> Result<Vec<User>> {
+        let users = self.database.fuzzy_search_users(query, limit).await?;
+
+        Ok(users.into_iter().map(User::from).collect())
+    }
+
+    async fn search_channel_members(
+        &self,
+        channel: &Channel,
+        query: &str,
+        limit: u32,
+    ) -> Result<(Vec<proto::ChannelMember>, Vec<User>)> {
+        let (members, users) = self
+            .database
+            .get_channel_participant_details(channel, query, limit as u64)
+            .await?;
+
+        Ok((
+            members
+                .into_iter()
+                .map(proto::ChannelMember::from)
+                .collect(),
+            users.into_iter().map(User::from).collect(),
+        ))
+    }
+}
+
+#[cfg(feature = "test-support")]
+mod fake_user_service {
+    use std::sync::Weak;
+
+    use collections::HashMap;
+    use tokio::sync::Mutex;
+
+    use super::*;
+
+    #[derive(Debug)]
+    pub struct NewUserParams {
+        pub github_login: String,
+        pub github_user_id: i32,
+    }
+
+    pub struct FakeUserService {
+        this: Weak<Self>,
+        state: Arc<Mutex<FakeUserServiceState>>,
+        database: Arc<Database>,
+    }
+
+    struct FakeUserServiceState {
+        next_user_id: UserId,
+        users: HashMap<UserId, User>,
+    }
+
+    impl Default for FakeUserServiceState {
+        fn default() -> Self {
+            Self {
+                next_user_id: UserId(1),
+                users: HashMap::default(),
+            }
+        }
+    }
+
+    impl FakeUserService {
+        pub fn new(database: Arc<Database>) -> Arc<Self> {
+            Arc::new_cyclic(|this| Self {
+                this: this.clone(),
+                state: Arc::new(Mutex::default()),
+                database,
+            })
+        }
+
+        pub async fn create_user(
+            &self,
+            email_address: &str,
+            name: Option<&str>,
+            admin: bool,
+            params: NewUserParams,
+        ) -> UserId {
+            let mut state = self.state.lock().await;
+
+            let user_id = state.next_user_id;
+            let _ = email_address;
+            state.users.insert(
+                user_id,
+                User {
+                    id: user_id,
+                    github_login: params.github_login,
+                    github_user_id: params.github_user_id,
+                    name: name.map(|name| name.to_string()),
+                    admin,
+                    connected_once: false,
+                },
+            );
+
+            state.next_user_id = UserId(state.next_user_id.0 + 1);
+
+            user_id
+        }
+
+        pub async fn get_user_by_id(&self, id: UserId) -> Result<Option<User>> {
+            let state = self.state.lock().await;
+
+            let user = state.users.get(&id).cloned();
+
+            Ok(user)
+        }
+    }
+
+    #[async_trait]
+    impl UserService for FakeUserService {
+        async fn get_users_by_ids(&self, ids: Vec<UserId>) -> Result<Vec<User>> {
+            let state = self.state.lock().await;
+
+            let users = state
+                .users
+                .values()
+                .filter(|user| ids.contains(&user.id))
+                .cloned()
+                .collect();
+
+            Ok(users)
+        }
+
+        async fn get_user_by_github_login(&self, github_login: &str) -> Result<Option<User>> {
+            let state = self.state.lock().await;
+
+            let user = state
+                .users
+                .values()
+                .find(|user| user.github_login == github_login)
+                .cloned();
+
+            Ok(user)
+        }
+
+        async fn fuzzy_search_users(&self, query: &str, limit: u32) -> Result<Vec<User>> {
+            let _ = query;
+            let _ = limit;
+            unimplemented!("not currently exercised by any tests")
+        }
+
+        async fn search_channel_members(
+            &self,
+            channel: &Channel,
+            query: &str,
+            limit: u32,
+        ) -> Result<(Vec<proto::ChannelMember>, Vec<User>)> {
+            let state = self.state.lock().await;
+
+            let users = state
+                .users
+                .values()
+                .filter(|user| user.github_login.contains(query))
+                .take(limit as usize)
+                .cloned()
+                .collect::<Vec<_>>();
+
+            let members = self
+                .database
+                .get_channel_memberships_for_user_ids(
+                    channel,
+                    users.iter().map(|user| user.id).collect(),
+                )
+                .await?;
+
+            Ok((
+                members
+                    .into_iter()
+                    .map(proto::ChannelMember::from)
+                    .collect(),
+                users,
+            ))
+        }
+
+        #[cfg(feature = "test-support")]
+        fn as_fake(&self) -> Arc<FakeUserService> {
+            self.this.upgrade().unwrap()
+        }
+    }
+}

crates/collab/tests/integration/channel_guest_tests.rs

@@ -281,7 +281,7 @@ async fn test_channel_requires_zed_cla(cx_a: &mut TestAppContext, cx_b: &mut Tes
     // User B signs the zed CLA.
     let user_b = server
         .app_state
-        .db
+        .user_service
         .get_user_by_github_login("user_b")
         .await
         .unwrap()

crates/collab/tests/integration/following_tests.rs

@@ -2381,3 +2381,106 @@ async fn test_following_while_deactivated(cx_a: &mut TestAppContext, cx_b: &mut
         assert_eq!(editor.tab_content_text(0, cx), "2.js");
     });
 }
+
+#[gpui::test(iterations = 10)]
+async fn test_following_with_multibuffer_excerpts_at_unobserved_lamport(
+    cx_a: &mut TestAppContext,
+    cx_b: &mut TestAppContext,
+) {
+    let executor = cx_a.executor();
+    let mut server = TestServer::start(executor.clone()).await;
+    let client_a = server.create_client(cx_a, "user_a").await;
+    let client_b = server.create_client(cx_b, "user_b").await;
+    server
+        .create_room(&mut [(&client_a, cx_a), (&client_b, cx_b)])
+        .await;
+
+    cx_a.update(editor::init);
+    cx_b.update(editor::init);
+
+    let active_call_a = cx_a.read(ActiveCall::global);
+    let active_call_b = cx_b.read(ActiveCall::global);
+
+    client_a
+        .fs()
+        .insert_tree(path!("/a"), json!({ "1.txt": sample_text(20, 5, 'a') }))
+        .await;
+    let (project_a, worktree_id) = client_a.build_local_project(path!("/a"), cx_a).await;
+    active_call_a
+        .update(cx_a, |call, cx| call.set_location(Some(&project_a), cx))
+        .await
+        .unwrap();
+    let project_id = active_call_a
+        .update(cx_a, |call, cx| call.share_project(project_a.clone(), cx))
+        .await
+        .unwrap();
+    let project_b = client_b.join_remote_project(project_id, cx_b).await;
+    active_call_b
+        .update(cx_b, |call, cx| call.set_location(Some(&project_b), cx))
+        .await
+        .unwrap();
+
+    let (workspace_a, cx_a) = client_a.build_workspace(&project_a, cx_a);
+    let (workspace_b, cx_b) = client_b.build_workspace(&project_b, cx_b);
+
+    let buffer_a = project_a
+        .update(cx_a, |p, cx| {
+            p.open_buffer((worktree_id, rel_path("1.txt")), cx)
+        })
+        .await
+        .unwrap();
+    // B must already have the buffer open at a low Lamport so that A's
+    // subsequent edits create anchors B hasn't observed.
+    let _buffer_b = project_b
+        .update(cx_b, |p, cx| {
+            p.open_buffer((worktree_id, rel_path("1.txt")), cx)
+        })
+        .await
+        .unwrap();
+
+    workspace_b.update_in(cx_b, |workspace, window, cx| {
+        workspace.follow(client_a.peer_id().unwrap(), window, cx)
+    });
+    executor.run_until_parked();
+
+    buffer_a.update(cx_a, |buf, cx| {
+        for i in 0..30 {
+            let len = buf.len();
+            buf.edit([(len..len, format!("\nappended line {i}"))], None, cx);
+        }
+    });
+    let multibuffer_a = cx_a.new(|cx| {
+        let mut mb = MultiBuffer::new(Capability::ReadWrite);
+        let max_row = buffer_a.read(cx).max_point().row;
+        mb.set_excerpts_for_path(
+            PathKey::for_buffer(&buffer_a, cx),
+            buffer_a.clone(),
+            [Point::row_range(max_row.saturating_sub(5)..max_row)],
+            1,
+            cx,
+        );
+        mb
+    });
+    workspace_a.update_in(cx_a, |workspace, window, cx| {
+        let editor = cx
+            .new(|cx| Editor::for_multibuffer(multibuffer_a, Some(project_a.clone()), window, cx));
+        workspace.add_item_to_active_pane(Box::new(editor), None, true, window, cx);
+    });
+
+    executor.run_until_parked();
+
+    let active_text = |workspace: &Entity<Workspace>, cx: &mut VisualTestContext| {
+        workspace.update(cx, |workspace, cx| {
+            workspace
+                .active_item(cx)
+                .unwrap()
+                .downcast::<Editor>()
+                .unwrap()
+                .update(cx, |editor, cx| editor.text(cx))
+        })
+    };
+    assert_eq!(
+        active_text(&workspace_a, cx_a),
+        active_text(&workspace_b, cx_b)
+    );
+}

crates/collab/tests/integration/test_server.rs

@@ -7,9 +7,10 @@ use client::{
     proto::PeerId,
 };
 use clock::FakeSystemClock;
+use collab::services::{FakeUserService, NewUserParams};
 use collab::{
     AppState, Config,
-    db::{NewUserParams, UserId},
+    db::UserId,
     executor::Executor,
     rpc::{CLEANUP_TIMEOUT, Principal, RECONNECT_TIMEOUT, Server, ZedVersion},
 };
@@ -179,14 +180,19 @@ impl TestServer {
 
         let clock = Arc::new(FakeSystemClock::new());
 
-        let user_id = if let Ok(Some(user)) = self.app_state.db.get_user_by_github_login(name).await
+        let user_id = if let Ok(Some(user)) = self
+            .app_state
+            .user_service
+            .get_user_by_github_login(name)
+            .await
         {
             user.id
         } else {
             let github_user_id = self.next_github_user_id;
             self.next_github_user_id += 1;
             self.app_state
-                .db
+                .user_service
+                .as_fake()
                 .create_user(
                     &format!("{name}@example.com"),
                     None,
@@ -197,8 +203,6 @@ impl TestServer {
                     },
                 )
                 .await
-                .expect("creating user failed")
-                .user_id
         };
 
         let http = FakeHttpClient::create({
@@ -244,7 +248,7 @@ impl TestServer {
         let client_name = name.to_string();
         let client = cx.update(|cx| Client::new(clock, http.clone(), cx));
         let server = self.server.clone();
-        let db = self.app_state.db.clone();
+        let user_service = self.app_state.user_service.clone();
         let connection_killers = self.connection_killers.clone();
         let forbid_connections = self.forbid_connections.clone();
 
@@ -268,7 +272,7 @@ impl TestServer {
                 );
 
                 let server = server.clone();
-                let db = db.clone();
+                let user_service = user_service.clone();
                 let connection_killers = connection_killers.clone();
                 let forbid_connections = forbid_connections.clone();
                 let client_name = client_name.clone();
@@ -281,7 +285,8 @@ impl TestServer {
                         let (client_conn, server_conn, killed) =
                             Connection::in_memory(cx.background_executor().clone());
                         let (connection_id_tx, connection_id_rx) = oneshot::channel();
-                        let user = db
+                        let user = user_service
+                            .as_fake()
                             .get_user_by_id(user_id)
                             .await
                             .map_err(|e| {
@@ -294,7 +299,7 @@ impl TestServer {
                         cx.background_spawn(server.handle_connection(
                             server_conn,
                             client_name,
-                            Principal::User(user.into()),
+                            Principal::User(user),
                             ZedVersion(semver::Version::new(1, 0, 0)),
                             Some("test".to_string()),
                             None,
@@ -576,6 +581,7 @@ impl TestServer {
             blob_store_client: None,
             executor,
             kinesis_client: None,
+            user_service: FakeUserService::new(test_db.db().clone()),
             config: Config {
                 http_port: 0,
                 database_url: "".into(),

crates/context_server/Cargo.toml

@@ -17,7 +17,6 @@ test-support = ["gpui/test-support"]
 [dependencies]
 anyhow.workspace = true
 async-channel.workspace = true
-async-process.workspace = true
 async-trait.workspace = true
 base64.workspace = true
 collections.workspace = true

crates/context_server/src/client.rs

@@ -131,6 +131,7 @@ struct Notification<'a, T> {
     jsonrpc: &'static str,
     #[serde(borrow)]
     method: &'a str,
+    #[serde(skip_serializing_if = "is_null_value")]
     params: T,
 }
 

crates/context_server/src/transport/stdio_transport.rs

@@ -1,15 +1,16 @@
 use std::path::PathBuf;
 use std::pin::Pin;
 
-use anyhow::{Context as _, Result};
-use async_process::Child;
+use anyhow::Result;
 use async_trait::async_trait;
 use futures::io::{BufReader, BufWriter};
 use futures::{
     AsyncBufReadExt as _, AsyncRead, AsyncWrite, AsyncWriteExt as _, Stream, StreamExt as _,
 };
 use gpui::AsyncApp;
+
 use util::TryFutureExt as _;
+use util::process::Child;
 use util::shell::Shell;
 use util::shell_builder::ShellBuilder;
 
@@ -31,22 +32,20 @@ impl StdioTransport {
     ) -> Result<Self> {
         let builder = ShellBuilder::new(&Shell::System, cfg!(windows)).non_interactive();
         let mut command =
-            builder.build_smol_command(Some(binary.executable.display().to_string()), &binary.args);
+            builder.build_std_command(Some(binary.executable.display().to_string()), &binary.args);
 
-        command
-            .envs(binary.env.unwrap_or_default())
-            .stdin(std::process::Stdio::piped())
-            .stdout(std::process::Stdio::piped())
-            .stderr(std::process::Stdio::piped())
-            .kill_on_drop(true);
+        command.envs(binary.env.unwrap_or_default());
 
         if let Some(working_directory) = working_directory {
             command.current_dir(working_directory);
         }
 
-        let mut server = command
-            .spawn()
-            .with_context(|| format!("failed to spawn command {command:?})",))?;
+        let mut server = Child::spawn(
+            command,
+            std::process::Stdio::piped(),
+            std::process::Stdio::piped(),
+            std::process::Stdio::piped(),
+        )?;
 
         let stdin = server.stdin.take().unwrap();
         let stdout = server.stdout.take().unwrap();

crates/edit_prediction/src/zeta.rs

@@ -24,8 +24,7 @@ use zeta_prompt::{ParsedOutput, ZetaPromptInput};
 
 use std::{env, ops::Range, path::Path, sync::Arc};
 use zeta_prompt::{
-    ZetaFormat, format_zeta_prompt, get_prefill, parse_zeta2_model_output,
-    prompt_input_contains_special_tokens, stop_tokens_for_format,
+    ZetaFormat, format_zeta_prompt, get_prefill, parse_zeta2_model_output, stop_tokens_for_format,
     zeta1::{self, EDITABLE_REGION_END_MARKER},
 };
 
@@ -120,10 +119,6 @@ pub fn request_prediction_with_zeta(
                 repo_url,
             );
 
-            if prompt_input_contains_special_tokens(&prompt_input, zeta_version) {
-                return Err(anyhow::anyhow!("prompt contains special tokens"));
-            }
-
             let formatted_prompt = format_zeta_prompt(&prompt_input, zeta_version);
 
             if let Some(debug_tx) = &debug_tx {

crates/edit_prediction_metrics/Cargo.toml

@@ -12,7 +12,7 @@ workspace = true
 path = "src/edit_prediction_metrics.rs"
 
 [dependencies]
-language.workspace = true
+imara-diff.workspace = true
 serde.workspace = true
 serde_json = "1.0"
 similar = "2.7.0"

crates/edit_prediction_metrics/src/prediction_score.rs

@@ -218,7 +218,9 @@ pub fn score_prediction(input: PredictionScoringInput<'_>) -> PredictionScore {
 
     for expected in input.expected_patches {
         let delta_chr_f_metrics = delta_chr_f(input.original_text, &expected.text, &actual_text);
-        if delta_chr_f_metrics.score > best_delta_chr_f_metrics.score {
+        if best_expected_text.is_none()
+            || delta_chr_f_metrics.score > best_delta_chr_f_metrics.score
+        {
             best_delta_chr_f_metrics = delta_chr_f_metrics;
             best_expected_cursor = expected.cursor_editable_region_offset;
             best_expected_text = Some(expected.text.as_str());
@@ -317,3 +319,33 @@ fn compute_cursor_metrics(
         (Some(_), None) | (None, Some(_)) => (None, Some(false)),
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_kept_rate_is_computed_when_best_delta_chr_f_score_is_zero() {
+        let original_text = "";
+        let actual_patch = "--- a/file.txt\n+++ b/file.txt\n@@ -0,0 +1 @@\n+bbbbbb\n";
+        let expected_patch = "--- a/file.txt\n+++ b/file.txt\n@@ -0,0 +1 @@\n+cccccc\n";
+        let expected_patches = [PreparedExpectedPatch {
+            patch: expected_patch.to_string(),
+            text: "cccccc".to_string(),
+            cursor_editable_region_offset: None,
+        }];
+
+        let score = score_prediction(PredictionScoringInput {
+            original_text,
+            expected_patches: &expected_patches,
+            actual_patch: Some(actual_patch),
+            actual_cursor: None,
+            reversal_context: None,
+            cumulative_logprob: None,
+            avg_logprob: None,
+        });
+
+        assert_eq!(score.delta_chr_f, 0.0);
+        assert_eq!(score.kept_rate, Some(0.0));
+    }
+}

crates/edit_prediction_metrics/src/reversal.rs

@@ -1,10 +1,155 @@
+use std::iter;
 use std::ops::Range;
 use std::path::Path;
 use std::sync::Arc;
 
-use language::{char_diff, text_diff};
+use crate::tokenize::tokenize;
+use imara_diff::{
+    Algorithm, diff,
+    intern::{InternedInput, Token},
+    sources::lines_with_terminator,
+};
 use zeta_prompt::udiff::apply_diff_to_string;
 
+fn text_diff(old_text: &str, new_text: &str) -> Vec<(Range<usize>, Arc<str>)> {
+    let empty: Arc<str> = Arc::default();
+    let mut edits = Vec::new();
+    let mut hunk_input = InternedInput::default();
+    let input = InternedInput::new(
+        lines_with_terminator(old_text),
+        lines_with_terminator(new_text),
+    );
+
+    diff_internal(&input, &mut |old_byte_range,
+                                new_byte_range,
+                                old_rows,
+                                new_rows| {
+        if should_perform_token_diff_within_hunk(
+            &old_byte_range,
+            &new_byte_range,
+            &old_rows,
+            &new_rows,
+        ) {
+            let old_offset = old_byte_range.start;
+            let new_offset = new_byte_range.start;
+            hunk_input.clear();
+            hunk_input.update_before(tokenize(&old_text[old_byte_range]).into_iter());
+            hunk_input.update_after(tokenize(&new_text[new_byte_range]).into_iter());
+            diff_internal(&hunk_input, &mut |old_byte_range, new_byte_range, _, _| {
+                let old_byte_range =
+                    old_offset + old_byte_range.start..old_offset + old_byte_range.end;
+                let new_byte_range =
+                    new_offset + new_byte_range.start..new_offset + new_byte_range.end;
+                let replacement_text = if new_byte_range.is_empty() {
+                    empty.clone()
+                } else {
+                    new_text[new_byte_range].into()
+                };
+                edits.push((old_byte_range, replacement_text));
+            });
+        } else {
+            let replacement_text = if new_byte_range.is_empty() {
+                empty.clone()
+            } else {
+                new_text[new_byte_range].into()
+            };
+            edits.push((old_byte_range, replacement_text));
+        }
+    });
+
+    edits
+}
+
+fn char_diff<'a>(old_text: &'a str, new_text: &'a str) -> Vec<(Range<usize>, &'a str)> {
+    let mut input: InternedInput<&str> = InternedInput::default();
+    input.update_before(tokenize_chars(old_text));
+    input.update_after(tokenize_chars(new_text));
+    let mut edits = Vec::new();
+
+    diff_internal(&input, &mut |old_byte_range, new_byte_range, _, _| {
+        let replacement = if new_byte_range.is_empty() {
+            ""
+        } else {
+            &new_text[new_byte_range]
+        };
+        edits.push((old_byte_range, replacement));
+    });
+
+    edits
+}
+
+fn should_perform_token_diff_within_hunk(
+    old_byte_range: &Range<usize>,
+    new_byte_range: &Range<usize>,
+    old_row_range: &Range<u32>,
+    new_row_range: &Range<u32>,
+) -> bool {
+    const MAX_TOKEN_DIFF_LEN: usize = 512;
+    const MAX_TOKEN_DIFF_LINE_COUNT: usize = 8;
+
+    !old_byte_range.is_empty()
+        && !new_byte_range.is_empty()
+        && old_byte_range.len() <= MAX_TOKEN_DIFF_LEN
+        && new_byte_range.len() <= MAX_TOKEN_DIFF_LEN
+        && old_row_range.len() <= MAX_TOKEN_DIFF_LINE_COUNT
+        && new_row_range.len() <= MAX_TOKEN_DIFF_LINE_COUNT
+}
+
+fn diff_internal(
+    input: &InternedInput<&str>,
+    on_change: &mut dyn FnMut(Range<usize>, Range<usize>, Range<u32>, Range<u32>),
+) {
+    let mut old_offset = 0;
+    let mut new_offset = 0;
+    let mut old_token_ix = 0;
+    let mut new_token_ix = 0;
+
+    diff(
+        Algorithm::Histogram,
+        input,
+        |old_tokens: Range<u32>, new_tokens: Range<u32>| {
+            old_offset += token_len(
+                input,
+                &input.before[old_token_ix as usize..old_tokens.start as usize],
+            );
+            new_offset += token_len(
+                input,
+                &input.after[new_token_ix as usize..new_tokens.start as usize],
+            );
+            let old_len = token_len(
+                input,
+                &input.before[old_tokens.start as usize..old_tokens.end as usize],
+            );
+            let new_len = token_len(
+                input,
+                &input.after[new_tokens.start as usize..new_tokens.end as usize],
+            );
+            let old_byte_range = old_offset..old_offset + old_len;
+            let new_byte_range = new_offset..new_offset + new_len;
+            old_token_ix = old_tokens.end;
+            new_token_ix = new_tokens.end;
+            old_offset = old_byte_range.end;
+            new_offset = new_byte_range.end;
+            on_change(old_byte_range, new_byte_range, old_tokens, new_tokens);
+        },
+    );
+}
+
+fn tokenize_chars(text: &str) -> impl Iterator<Item = &str> {
+    let mut chars = text.char_indices();
+    iter::from_fn(move || {
+        let (start, character) = chars.next()?;
+        Some(&text[start..start + character.len_utf8()])
+    })
+}
+
+fn token_len(input: &InternedInput<&str>, tokens: &[Token]) -> usize {
+    tokens
+        .iter()
+        .map(|token| input.interner[*token].len())
+        .sum()
+}
+
 fn apply_diff_to_string_lenient(diff_str: &str, text: &str) -> String {
     let hunks = parse_diff_hunks(diff_str);
     let mut result = text.to_string();
@@ -651,7 +796,7 @@ pub fn compute_prediction_reversal_ratio_from_history(
 mod tests {
     use super::*;
     use indoc::indoc;
-    use zeta_prompt::udiff::apply_diff_to_string;
+    use zeta_prompt::udiff::{apply_diff_to_string, unified_diff_with_context};
     use zeta_prompt::{ExcerptRanges, ZetaPromptInput};
 
     fn compute_prediction_reversal_ratio(
@@ -1008,8 +1153,8 @@ mod tests {
              last line
          "};
 
-        // unified_diff doesn't include file headers, but apply_diff_to_string needs them
-        let diff_body = language::unified_diff(original, modified);
+        // unified_diff_with_context doesn't include file headers, but apply_diff_to_string needs them
+        let diff_body = unified_diff_with_context(original, modified, 0, 0, 3);
         let forward_diff = format!("--- a/file\n+++ b/file\n{}", diff_body);
         let reversed_diff = reverse_diff(&forward_diff);
 

crates/editor/src/config.rs

@@ -0,0 +1,352 @@
+use super::*;
+
+impl Editor {
+    pub fn style(&mut self, cx: &App) -> &EditorStyle {
+        match self.style {
+            Some(ref style) => style,
+            None => {
+                let style = self.create_style(cx);
+                self.style.insert(style)
+            }
+        }
+    }
+
+    pub fn set_soft_wrap_mode(
+        &mut self,
+        mode: language_settings::SoftWrap,
+        cx: &mut Context<Self>,
+    ) {
+        self.soft_wrap_mode_override = Some(mode);
+        cx.notify();
+    }
+
+    pub fn set_hard_wrap(&mut self, hard_wrap: Option<usize>, cx: &mut Context<Self>) {
+        self.hard_wrap = hard_wrap;
+        cx.notify();
+    }
+
+    pub fn set_text_style_refinement(&mut self, style: TextStyleRefinement) {
+        self.text_style_refinement = Some(style);
+    }
+
+    /// called by the Element so we know what style we were most recently rendered with.
+    pub fn set_style(&mut self, style: EditorStyle, window: &mut Window, cx: &mut Context<Self>) {
+        // We intentionally do not inform the display map about the minimap style
+        // so that wrapping is not recalculated and stays consistent for the editor
+        // and its linked minimap.
+        if !self.mode.is_minimap() {
+            let font = style.text.font();
+            let font_size = style.text.font_size.to_pixels(window.rem_size());
+            let display_map = self
+                .placeholder_display_map
+                .as_ref()
+                .filter(|_| self.is_empty(cx))
+                .unwrap_or(&self.display_map);
+
+            display_map.update(cx, |map, cx| map.set_font(font, font_size, cx));
+        }
+        self.style = Some(style);
+    }
+
+    pub fn set_soft_wrap(&mut self) {
+        self.soft_wrap_mode_override = Some(language_settings::SoftWrap::EditorWidth)
+    }
+
+    pub fn set_show_wrap_guides(&mut self, show_wrap_guides: bool, cx: &mut Context<Self>) {
+        self.show_wrap_guides = Some(show_wrap_guides);
+        cx.notify();
+    }
+
+    pub fn set_show_indent_guides(&mut self, show_indent_guides: bool, cx: &mut Context<Self>) {
+        self.show_indent_guides = Some(show_indent_guides);
+        cx.notify();
+    }
+
+    pub fn disable_indent_guides_for_buffer(
+        &mut self,
+        buffer_id: BufferId,
+        cx: &mut Context<Self>,
+    ) {
+        self.buffers_with_disabled_indent_guides.insert(buffer_id);
+        cx.notify();
+    }
+
+    pub fn toggle_line_numbers(
+        &mut self,
+        _: &ToggleLineNumbers,
+        _: &mut Window,
+        cx: &mut Context<Self>,
+    ) {
+        let mut editor_settings = EditorSettings::get_global(cx).clone();
+        editor_settings.gutter.line_numbers = !editor_settings.gutter.line_numbers;
+        EditorSettings::override_global(editor_settings, cx);
+    }
+
+    pub fn line_numbers_enabled(&self, cx: &App) -> bool {
+        if let Some(show_line_numbers) = self.show_line_numbers {
+            return show_line_numbers;
+        }
+        EditorSettings::get_global(cx).gutter.line_numbers
+    }
+
+    pub fn relative_line_numbers(&self, cx: &App) -> RelativeLineNumbers {
+        match (
+            self.use_relative_line_numbers,
+            EditorSettings::get_global(cx).relative_line_numbers,
+        ) {
+            (None, setting) => setting,
+            (Some(false), _) => RelativeLineNumbers::Disabled,
+            (Some(true), RelativeLineNumbers::Wrapped) => RelativeLineNumbers::Wrapped,
+            (Some(true), _) => RelativeLineNumbers::Enabled,
+        }
+    }
+
+    pub fn set_relative_line_number(&mut self, is_relative: Option<bool>, cx: &mut Context<Self>) {
+        self.use_relative_line_numbers = is_relative;
+        cx.notify();
+    }
+
+    pub fn set_show_gutter(&mut self, show_gutter: bool, cx: &mut Context<Self>) {
+        self.show_gutter = show_gutter;
+        cx.notify();
+    }
+
+    pub fn set_show_vertical_scrollbar(&mut self, show: bool, cx: &mut Context<Self>) {
+        self.show_scrollbars.vertical = show;
+        cx.notify();
+    }
+
+    pub fn set_show_horizontal_scrollbar(&mut self, show: bool, cx: &mut Context<Self>) {
+        self.show_scrollbars.horizontal = show;
+        cx.notify();
+    }
+
+    pub fn set_minimap_visibility(
+        &mut self,
+        minimap_visibility: MinimapVisibility,
+        window: &mut Window,
+        cx: &mut Context<Self>,
+    ) {
+        if self.minimap_visibility != minimap_visibility {
+            if minimap_visibility.visible() && self.minimap.is_none() {
+                let minimap_settings = EditorSettings::get_global(cx).minimap;
+                self.minimap =
+                    self.create_minimap(minimap_settings.with_show_override(), window, cx);
+            }
+            self.minimap_visibility = minimap_visibility;
+            cx.notify();
+        }
+    }
+
+    pub fn disable_scrollbars_and_minimap(&mut self, window: &mut Window, cx: &mut Context<Self>) {
+        self.set_show_scrollbars(false, cx);
+        self.set_minimap_visibility(MinimapVisibility::Disabled, window, cx);
+    }
+
+    pub fn hide_minimap_by_default(&mut self, window: &mut Window, cx: &mut Context<Self>) {
+        self.set_minimap_visibility(self.minimap_visibility.hidden(), window, cx);
+    }
+
+    /// Normally the text in full mode and auto height editors is padded on the
+    /// left side by roughly half a character width for improved hit testing.
+    ///
+    /// Use this method to disable this for cases where this is not wanted (e.g.
+    /// if you want to align the editor text with some other text above or below)
+    /// or if you want to add this padding to single-line editors.
+    pub fn set_offset_content(&mut self, offset_content: bool, cx: &mut Context<Self>) {
+        self.offset_content = offset_content;
+        cx.notify();
+    }
+
+    pub fn set_show_line_numbers(&mut self, show_line_numbers: bool, cx: &mut Context<Self>) {
+        self.show_line_numbers = Some(show_line_numbers);
+        cx.notify();
+    }
+
+    pub fn disable_expand_excerpt_buttons(&mut self, cx: &mut Context<Self>) {
+        self.disable_expand_excerpt_buttons = true;
+        cx.notify();
+    }
+
+    pub fn set_show_git_diff_gutter(&mut self, show_git_diff_gutter: bool, cx: &mut Context<Self>) {
+        self.show_git_diff_gutter = Some(show_git_diff_gutter);
+        cx.notify();
+    }
+
+    pub fn set_show_code_actions(&mut self, show_code_actions: bool, cx: &mut Context<Self>) {
+        self.show_code_actions = Some(show_code_actions);
+        cx.notify();
+    }
+
+    pub fn set_show_runnables(&mut self, show_runnables: bool, cx: &mut Context<Self>) {
+        self.show_runnables = Some(show_runnables);
+        cx.notify();
+    }
+
+    pub fn set_show_breakpoints(&mut self, show_breakpoints: bool, cx: &mut Context<Self>) {
+        self.show_breakpoints = Some(show_breakpoints);
+        cx.notify();
+    }
+
+    pub fn set_show_diff_review_button(&mut self, show: bool, cx: &mut Context<Self>) {
+        self.show_diff_review_button = show;
+        cx.notify();
+    }
+
+    fn set_show_scrollbars(&mut self, show: bool, cx: &mut Context<Self>) {
+        self.show_scrollbars = ScrollbarAxes {
+            horizontal: show,
+            vertical: show,
+        };
+        cx.notify();
+    }
+
+    pub(super) fn wrap_guides(&self, cx: &App) -> SmallVec<[(usize, bool); 2]> {
+        let mut wrap_guides = smallvec![];
+
+        if self.show_wrap_guides == Some(false) {
+            return wrap_guides;
+        }
+
+        let settings = self.buffer.read(cx).language_settings(cx);
+        if settings.show_wrap_guides {
+            match self.soft_wrap_mode(cx) {
+                SoftWrap::Bounded(soft_wrap) => {
+                    wrap_guides.push((soft_wrap as usize, true));
+                }
+                SoftWrap::GitDiff | SoftWrap::None | SoftWrap::EditorWidth => {}
+            }
+            wrap_guides.extend(settings.wrap_guides.iter().map(|guide| (*guide, false)))
+        }
+
+        wrap_guides
+    }
+
+    pub(super) fn soft_wrap_mode(&self, cx: &App) -> SoftWrap {
+        let settings = self.buffer.read(cx).language_settings(cx);
+        let mode = self.soft_wrap_mode_override.unwrap_or(settings.soft_wrap);
+        match mode {
+            language_settings::SoftWrap::PreferLine | language_settings::SoftWrap::None => {
+                SoftWrap::None
+            }
+            language_settings::SoftWrap::EditorWidth => SoftWrap::EditorWidth,
+            language_settings::SoftWrap::Bounded => {
+                SoftWrap::Bounded(settings.preferred_line_length)
+            }
+        }
+    }
+
+    // Called by the element. This method is not designed to be called outside of the editor
+    // element's layout code because it does not notify when rewrapping is computed synchronously.
+    pub(super) fn set_wrap_width(&self, width: Option<Pixels>, cx: &mut App) -> bool {
+        if self.is_empty(cx) {
+            self.placeholder_display_map
+                .as_ref()
+                .map_or(false, |display_map| {
+                    display_map.update(cx, |map, cx| map.set_wrap_width(width, cx))
+                })
+        } else {
+            self.display_map
+                .update(cx, |map, cx| map.set_wrap_width(width, cx))
+        }
+    }
+
+    pub(super) fn toggle_soft_wrap(
+        &mut self,
+        _: &ToggleSoftWrap,
+        _: &mut Window,
+        cx: &mut Context<Self>,
+    ) {
+        if self.soft_wrap_mode_override.is_some() {
+            self.soft_wrap_mode_override.take();
+        } else {
+            let soft_wrap = match self.soft_wrap_mode(cx) {
+                SoftWrap::GitDiff => return,
+                SoftWrap::None => language_settings::SoftWrap::EditorWidth,
+                SoftWrap::EditorWidth | SoftWrap::Bounded(_) => language_settings::SoftWrap::None,
+            };
+            self.soft_wrap_mode_override = Some(soft_wrap);
+        }
+        cx.notify();
+    }
+
+    pub(super) fn toggle_tab_bar(
+        &mut self,
+        _: &ToggleTabBar,
+        _: &mut Window,
+        cx: &mut Context<Self>,
+    ) {
+        let Some(workspace) = self.workspace() else {
+            return;
+        };
+        let fs = workspace.read(cx).app_state().fs.clone();
+        let current_show = TabBarSettings::get_global(cx).show;
+        update_settings_file(fs, cx, move |setting, _| {
+            setting.tab_bar.get_or_insert_default().show = Some(!current_show);
+        });
+    }
+
+    pub(super) fn toggle_indent_guides(
+        &mut self,
+        _: &ToggleIndentGuides,
+        _: &mut Window,
+        cx: &mut Context<Self>,
+    ) {
+        let currently_enabled = self.should_show_indent_guides().unwrap_or_else(|| {
+            self.buffer
+                .read(cx)
+                .language_settings(cx)
+                .indent_guides
+                .enabled
+        });
+        self.show_indent_guides = Some(!currently_enabled);
+        cx.notify();
+    }
+
+    pub(super) fn should_show_indent_guides(&self) -> Option<bool> {
+        self.show_indent_guides
+    }
+
+    pub(super) fn has_indent_guides_disabled_for_buffer(&self, buffer_id: BufferId) -> bool {
+        self.buffers_with_disabled_indent_guides
+            .contains(&buffer_id)
+    }
+
+    pub(super) fn toggle_relative_line_numbers(
+        &mut self,
+        _: &ToggleRelativeLineNumbers,
+        _: &mut Window,
+        cx: &mut Context<Self>,
+    ) {
+        let is_relative = self.relative_line_numbers(cx);
+        self.set_relative_line_number(Some(!is_relative.enabled()), cx)
+    }
+
+    pub(super) fn set_number_deleted_lines(&mut self, number: bool, cx: &mut Context<Self>) {
+        self.number_deleted_lines = number;
+        cx.notify();
+    }
+
+    pub fn set_delegate_open_excerpts(&mut self, delegate: bool) {
+        self.delegate_open_excerpts = delegate;
+    }
+
+    pub(super) fn set_delegate_expand_excerpts(&mut self, delegate: bool) {
+        self.delegate_expand_excerpts = delegate;
+    }
+
+    pub(super) fn set_delegate_stage_and_restore(&mut self, delegate: bool) {
+        self.delegate_stage_and_restore = delegate;
+    }
+
+    pub(super) fn set_on_local_selections_changed(
+        &mut self,
+        callback: Option<Box<dyn Fn(Point, &mut Window, &mut Context<Self>) + 'static>>,
+    ) {
+        self.on_local_selections_changed = callback;
+    }
+
+    pub(super) fn set_suppress_selection_callback(&mut self, suppress: bool) {
+        self.suppress_selection_callback = suppress;
+    }
+}

crates/editor/src/editor_tests.rs

@@ -8173,7 +8173,7 @@ async fn test_rewrap(cx: &mut TestAppContext) {
     ) {
         cx.update_buffer(|buffer, cx| buffer.set_language(Some(language), cx));
         cx.set_state(unwrapped_text);
-        cx.update_editor(|e, window, cx| e.rewrap(&Rewrap, window, cx));
+        cx.update_editor(|e, _, cx| e.rewrap(RewrapOptions::default(), cx));
         cx.assert_editor_state(wrapped_text);
     }
 }
@@ -8578,7 +8578,7 @@ async fn test_rewrap_block_comments(cx: &mut TestAppContext) {
     ) {
         cx.update_buffer(|buffer, cx| buffer.set_language(Some(language), cx));
         cx.set_state(unwrapped_text);
-        cx.update_editor(|e, window, cx| e.rewrap(&Rewrap, window, cx));
+        cx.update_editor(|e, _, cx| e.rewrap(RewrapOptions::default(), cx));
         cx.assert_editor_state(wrapped_text);
     }
 }
@@ -8604,7 +8604,7 @@ async fn test_rewrap_line_comment_in_go(cx: &mut TestAppContext) {
     cx.set_state(indoc! {"
         // Lorem ipsum dolor sit amet, consectetur adipiscing elit.ˇ
     "});
-    cx.update_editor(|e, window, cx| e.rewrap(&Rewrap, window, cx));
+    cx.update_editor(|e, _, cx| e.rewrap(RewrapOptions::default(), cx));
     cx.assert_editor_state(indoc! {"
         // Lorem ipsum dolor sit amet,
         // consectetur adipiscing elit.ˇ
@@ -8632,7 +8632,7 @@ async fn test_rewrap_line_comment_in_c(cx: &mut TestAppContext) {
     cx.set_state(indoc! {"
         // Lorem ipsum dolor sit amet, consectetur adipiscing elit.ˇ
     "});
-    cx.update_editor(|e, window, cx| e.rewrap(&Rewrap, window, cx));
+    cx.update_editor(|e, _, cx| e.rewrap(RewrapOptions::default(), cx));
     cx.assert_editor_state(indoc! {"
         // Lorem ipsum dolor sit amet,
         // consectetur adipiscing elit.ˇ

crates/editor/src/element.rs

@@ -570,7 +570,9 @@ impl EditorElement {
             register_action(editor, window, Editor::move_line_up);
             register_action(editor, window, Editor::move_line_down);
             register_action(editor, window, Editor::transpose);
-            register_action(editor, window, Editor::rewrap);
+            register_action(editor, window, |editor, _: &crate::Rewrap, _, cx| {
+                editor.rewrap(crate::RewrapOptions::default(), cx);
+            });
             register_action(editor, window, Editor::cut);
             register_action(editor, window, Editor::kill_ring_cut);
             register_action(editor, window, Editor::kill_ring_yank);
@@ -10081,8 +10083,6 @@ impl Element for EditorElement {
                         .editor
                         .update(cx, |editor, cx| editor.highlighted_display_rows(window, cx));
 
-                    let is_light = cx.theme().appearance().is_light();
-
                     let mut highlighted_ranges = self
                         .editor_with_selections(cx)
                         .map(|editor| {
@@ -10122,42 +10122,49 @@ impl Element for EditorElement {
                         })
                         .unwrap_or_default();
 
+                    struct DiffHunkHighlightColors {
+                        filled_background: Hsla,
+                        hollow_background: Hsla,
+                        hollow_border: Hsla,
+                    }
+
+                    let colors = cx.theme().colors();
+                    let added_diff_hunk_colors = DiffHunkHighlightColors {
+                        filled_background: colors.editor_diff_hunk_added_background,
+                        hollow_background: colors.editor_diff_hunk_added_hollow_background,
+                        hollow_border: colors.editor_diff_hunk_added_hollow_border,
+                    };
+                    let deleted_diff_hunk_colors = DiffHunkHighlightColors {
+                        filled_background: colors.editor_diff_hunk_deleted_background,
+                        hollow_background: colors.editor_diff_hunk_deleted_hollow_background,
+                        hollow_border: colors.editor_diff_hunk_deleted_hollow_border,
+                    };
+                    let drag_highlight_color = colors.editor_active_line_background;
+                    let drag_border_color = colors.border_focused;
+
                     for (ix, row_info) in row_infos.iter().enumerate() {
                         let Some(diff_status) = row_info.diff_status else {
                             continue;
                         };
 
-                        let background_color = match diff_status.kind {
-                            DiffHunkStatusKind::Added => cx.theme().colors().version_control_added,
-                            DiffHunkStatusKind::Deleted => {
-                                cx.theme().colors().version_control_deleted
-                            }
+                        let diff_hunk_colors = match diff_status.kind {
+                            DiffHunkStatusKind::Added => &added_diff_hunk_colors,
+                            DiffHunkStatusKind::Deleted => &deleted_diff_hunk_colors,
                             DiffHunkStatusKind::Modified => {
                                 debug_panic!("modified diff status for row info");
                                 continue;
                             }
                         };
 
-                        let hunk_opacity = if is_light { 0.16 } else { 0.12 };
-
                         let hollow_highlight = LineHighlight {
-                            background: (background_color.opacity(if is_light {
-                                0.08
-                            } else {
-                                0.06
-                            }))
-                            .into(),
-                            border: Some(if is_light {
-                                background_color.opacity(0.48)
-                            } else {
-                                background_color.opacity(0.36)
-                            }),
+                            background: diff_hunk_colors.hollow_background.into(),
+                            border: Some(diff_hunk_colors.hollow_border),
                             include_gutter: true,
                             type_id: None,
                         };
 
                         let filled_highlight = LineHighlight {
-                            background: solid_background(background_color.opacity(hunk_opacity)),
+                            background: solid_background(diff_hunk_colors.filled_background),
                             border: None,
                             include_gutter: true,
                             type_id: None,
@@ -10182,11 +10189,9 @@ impl Element for EditorElement {
                         let range = drag_state.row_range(&snapshot.display_snapshot);
                         let start_row = range.start().0;
                         let end_row = range.end().0;
-                        let drag_highlight_color =
-                            cx.theme().colors().editor_active_line_background;
                         let drag_highlight = LineHighlight {
                             background: solid_background(drag_highlight_color),
-                            border: Some(cx.theme().colors().border_focused),
+                            border: Some(drag_border_color),
                             include_gutter: true,
                             type_id: None,
                         };

crates/editor/src/hover_links.rs

@@ -14,7 +14,7 @@ use settings::Settings;
 use std::{ops::Range, sync::LazyLock};
 use text::OffsetRangeExt;
 use theme::ActiveTheme as _;
-use util::{ResultExt, TryFutureExt as _, maybe};
+use util::{ResultExt, TryFutureExt as _, maybe, paths::PathWithPosition};
 
 #[derive(Debug)]
 pub struct HoveredLinkState {
@@ -63,7 +63,7 @@ impl RangeInEditor {
 #[derive(Debug, Clone)]
 pub enum HoverLink {
     Url(String),
-    File(ResolvedPath),
+    File(ResolvedFileTarget),
     Text(LocationLink),
     InlayHint(lsp::Location, LanguageServerId),
 }
@@ -376,7 +376,7 @@ pub fn show_link_definition(
                             (range, vec![HoverLink::Url(url)])
                         })
                         .ok()
-                    } else if let Some((filename_range, filename)) =
+                    } else if let Some((filename_range, file_target)) =
                         find_file(&buffer, project.clone(), anchor, cx).await
                     {
                         let range = maybe!({
@@ -385,7 +385,7 @@ pub fn show_link_definition(
                             Some(RangeInEditor::Text(range))
                         });
 
-                        Some((range, vec![HoverLink::File(filename)]))
+                        Some((range, vec![HoverLink::File(file_target)]))
                     } else if let Some(provider) = provider {
                         let task = cx.update(|_, cx| {
                             provider.definitions(&buffer, anchor, preferred_kind, cx)
@@ -608,12 +608,49 @@ pub(crate) fn find_url_from_range(
     None
 }
 
+#[derive(Debug, Clone)]
+pub(crate) struct ResolvedFileTarget {
+    pub resolved_path: ResolvedPath,
+    pub row: Option<u32>,
+    pub column: Option<u32>,
+}
+
+impl ResolvedFileTarget {
+    /// After opening a file, navigate the editor to the row/column position if present.
+    pub fn navigate_item_to_position(
+        &self,
+        item: Box<dyn crate::ItemHandle>,
+        cx: &mut AsyncWindowContext,
+    ) {
+        if let Some(row) = self.row {
+            let col = self.column.unwrap_or(0);
+            if let Some(active_editor) = item.downcast::<crate::Editor>() {
+                active_editor
+                    .downgrade()
+                    .update_in(cx, |editor, window, cx| {
+                        let row = row.saturating_sub(1);
+                        let col = col.saturating_sub(1);
+                        let Some(buffer) = editor.buffer().read(cx).as_singleton() else {
+                            return;
+                        };
+                        let point = buffer
+                            .read(cx)
+                            .snapshot()
+                            .point_from_external_input(row, col);
+                        editor.go_to_singleton_buffer_point_silently(point, window, cx);
+                    })
+                    .log_err();
+            }
+        }
+    }
+}
+
 pub(crate) async fn find_file(
     buffer: &Entity<language::Buffer>,
     project: Option<Entity<Project>>,
     position: text::Anchor,
     cx: &mut AsyncWindowContext,
-) -> Option<(Range<text::Anchor>, ResolvedPath)> {
+) -> Option<(Range<text::Anchor>, ResolvedFileTarget)> {
     let project = project?;
     let snapshot = buffer.read_with(cx, |buffer, _| buffer.snapshot());
     let scope = snapshot.language_scope_at(position);
@@ -636,19 +673,53 @@ pub(crate) async fn find_file(
 
     let pattern_candidates = link_pattern_file_candidates(&candidate_file_path);
 
+    // Compute the highlight range for a pattern_range within the candidate string.
+    let make_range = |pattern_range: &Range<usize>| -> Range<text::Anchor> {
+        let offset_range = range.to_offset(&snapshot);
+        let actual_start = offset_range.start + pattern_range.start;
+        let actual_end = offset_range.end - (candidate_len - pattern_range.end);
+        snapshot.anchor_before(actual_start)..snapshot.anchor_after(actual_end)
+    };
+
+    // For each candidate extracted by link_pattern_file_candidates, try resolving in order:
+    // 1. The raw candidate string
+    // 2. The path portion after stripping `:row:col` suffix
+    // 3. With language-specific file extensions appended to raw candidate
+    // 4. With language-specific file extensions appended to stripped path
     for (pattern_candidate, pattern_range) in &pattern_candidates {
+        // Try the raw candidate first.
         if let Some(existing_path) = check_path(&pattern_candidate, &project, buffer, cx).await {
-            let offset_range = range.to_offset(&snapshot);
-            let actual_start = offset_range.start + pattern_range.start;
-            let actual_end = offset_range.end - (candidate_len - pattern_range.end);
             return Some((
-                snapshot.anchor_before(actual_start)..snapshot.anchor_after(actual_end),
-                existing_path,
+                make_range(pattern_range),
+                ResolvedFileTarget {
+                    resolved_path: existing_path,
+                    row: None,
+                    column: None,
+                },
             ));
         }
-    }
-    if let Some(scope) = scope {
-        for (pattern_candidate, pattern_range) in pattern_candidates {
+
+        // Parse row:col suffix once per candidate for use in fallback attempts.
+        // This handles patterns like `file.rs:83:1`, `file.rs:83`, and `file.rs:20:in`.
+        let parsed = PathWithPosition::parse_str(pattern_candidate);
+        let parsed_path = parsed.path.to_string_lossy();
+
+        // Try resolving just the path portion (without :row:col).
+        if parsed.row.is_some() {
+            if let Some(existing_path) = check_path(&parsed_path, &project, buffer, cx).await {
+                return Some((
+                    make_range(pattern_range),
+                    ResolvedFileTarget {
+                        resolved_path: existing_path,
+                        row: parsed.row,
+                        column: parsed.column,
+                    },
+                ));
+            }
+        }
+
+        // Try with language-specific suffixes.
+        if let Some(scope) = &scope {
             for suffix in scope.path_suffixes() {
                 if pattern_candidate.ends_with(format!(".{suffix}").as_str()) {
                     continue;
@@ -658,15 +729,39 @@ pub(crate) async fn find_file(
                 if let Some(existing_path) =
                     check_path(&suffixed_candidate, &project, buffer, cx).await
                 {
-                    let offset_range = range.to_offset(&snapshot);
-                    let actual_start = offset_range.start + pattern_range.start;
-                    let actual_end = offset_range.end - (candidate_len - pattern_range.end);
                     return Some((
-                        snapshot.anchor_before(actual_start)..snapshot.anchor_after(actual_end),
-                        existing_path,
+                        make_range(pattern_range),
+                        ResolvedFileTarget {
+                            resolved_path: existing_path,
+                            row: None,
+                            column: None,
+                        },
                     ));
                 }
             }
+
+            // Try with language-specific suffixes on the stripped path.
+            if parsed.row.is_some() {
+                for suffix in scope.path_suffixes() {
+                    if parsed_path.ends_with(&format!(".{suffix}")) {
+                        continue;
+                    }
+
+                    let suffixed_candidate = format!("{parsed_path}.{suffix}");
+                    if let Some(existing_path) =
+                        check_path(&suffixed_candidate, &project, buffer, cx).await
+                    {
+                        return Some((
+                            make_range(pattern_range),
+                            ResolvedFileTarget {
+                                resolved_path: existing_path,
+                                row: parsed.row,
+                                column: parsed.column,
+                            },
+                        ));
+                    }
+                }
+            }
         }
     }
     None
@@ -721,7 +816,7 @@ fn surrounding_filename(
             found_start = true;
             break;
         }
-        if (ch == '"' || ch == '\'') && !inside_quotes {
+        if (ch == '"' || ch == '\'' || ch == '`') && !inside_quotes {
             found_start = true;
             inside_quotes = true;
             break;
@@ -754,7 +849,7 @@ fn surrounding_filename(
             found_end = true;
             break;
         }
-        if ch == '"' || ch == '\'' {
+        if ch == '"' || ch == '\'' || ch == '`' {
             // If we're inside quotes, we stop when we come across the next quote
             if inside_quotes {
                 found_end = true;
@@ -1576,6 +1671,16 @@ mod tests {
             (" ˇ\"常\"", Some("常")),
             (" \"ˇ常\"", Some("常")),
             ("ˇ\"常\"", Some("常")),
+            // Path with row:column suffix
+            ("fiˇle.rs:83:1", Some("file.rs:83:1")),
+            ("file.rs:83ˇ:1 foo", Some("file.rs:83:1")),
+            ("file.rs:20ˇ:in bar", Some("file.rs:20:in")),
+            // Backtick delimiters
+            ("`fˇile.txt`", Some("file.txt")),
+            ("ˇ`file.txt`", Some("file.txt")),
+            ("`fˇile.txt` and more", Some("file.txt")),
+            // Backtick with row:col
+            ("`fiˇle.rs:83:1`", Some("file.rs:83:1")),
         ];
 
         for (input, expected) in test_cases {
@@ -1873,6 +1978,274 @@ mod tests {
         });
     }
 
+    #[gpui::test]
+    async fn test_hover_filename_with_row_column(cx: &mut gpui::TestAppContext) {
+        init_test(cx, |_| {});
+        let mut cx = EditorLspTestContext::new_rust(
+            lsp::ServerCapabilities {
+                ..Default::default()
+            },
+            cx,
+        )
+        .await;
+
+        // Insert a new file with multiple lines
+        let fs = cx.update_workspace(|workspace, _, cx| workspace.project().read(cx).fs().clone());
+        fs.as_fake()
+            .insert_file(
+                path!("/root/dir/file2.rs"),
+                "line 1\nline 2\nline 3\nline 4\nline 5\nline 6\nline 7\nline 8\nline 9\nline 10\n"
+                    .as_bytes()
+                    .to_vec(),
+            )
+            .await;
+
+        // file2.rs:5:3 should be highlighted and clickable
+        cx.set_state(indoc! {"
+            Go to file2.rs:5:3 for the fix.ˇ
+        "});
+
+        let screen_coord = cx.pixel_position(indoc! {"
+            Go to filˇe2.rs:5:3 for the fix.
+        "});
+
+        cx.simulate_mouse_move(screen_coord, None, Modifiers::secondary_key());
+        cx.assert_editor_text_highlights(
+            HighlightKey::HoveredLinkState,
+            indoc! {"
+            Go to «file2.rs:5:3ˇ» for the fix.
+        "},
+        );
+
+        cx.simulate_click(screen_coord, Modifiers::secondary_key());
+
+        cx.update_workspace(|workspace, _, cx| assert_eq!(workspace.items(cx).count(), 2));
+        cx.update_workspace(|workspace, window, cx| {
+            let active_editor = workspace.active_item_as::<Editor>(cx).unwrap();
+            {
+                let editor = active_editor.read(cx);
+                let buffer = editor.buffer().read(cx).as_singleton().unwrap();
+                let file = buffer.read(cx).file().unwrap();
+                let file_path = file.as_local().unwrap().abs_path(cx);
+                assert_eq!(
+                    file_path,
+                    std::path::PathBuf::from(path!("/root/dir/file2.rs"))
+                );
+            }
+
+            // Check that the cursor is at row 5, column 3 (0-indexed: row 4, col 2)
+            let (count, snapshot) = active_editor.update(cx, |editor, cx| {
+                (editor.selections.count(), editor.snapshot(window, cx))
+            });
+            assert_eq!(count, 1);
+            let selections = active_editor
+                .read(cx)
+                .selections
+                .newest::<language::Point>(&snapshot.display_snapshot);
+            assert_eq!(
+                selections.head().row,
+                4,
+                "Expected cursor on row 5 (0-indexed: 4)"
+            );
+            assert_eq!(
+                selections.head().column,
+                2,
+                "Expected cursor on column 3 (0-indexed: 2)"
+            );
+        });
+    }
+
+    #[gpui::test]
+    async fn test_hover_filename_with_row_only(cx: &mut gpui::TestAppContext) {
+        init_test(cx, |_| {});
+        let mut cx = EditorLspTestContext::new_rust(
+            lsp::ServerCapabilities {
+                ..Default::default()
+            },
+            cx,
+        )
+        .await;
+
+        let fs = cx.update_workspace(|workspace, _, cx| workspace.project().read(cx).fs().clone());
+        fs.as_fake()
+            .insert_file(
+                path!("/root/dir/file2.rs"),
+                "line 1\nline 2\nline 3\nline 4\nline 5\n"
+                    .as_bytes()
+                    .to_vec(),
+            )
+            .await;
+
+        // file2.rs:3 should be highlighted and clickable
+        cx.set_state(indoc! {"
+            Go to file2.rs:3 please.ˇ
+        "});
+
+        let screen_coord = cx.pixel_position(indoc! {"
+            Go to filˇe2.rs:3 please.
+        "});
+
+        cx.simulate_mouse_move(screen_coord, None, Modifiers::secondary_key());
+        cx.assert_editor_text_highlights(
+            HighlightKey::HoveredLinkState,
+            indoc! {"
+            Go to «file2.rs:3ˇ» please.
+        "},
+        );
+
+        cx.simulate_click(screen_coord, Modifiers::secondary_key());
+
+        cx.update_workspace(|workspace, window, cx| {
+            let active_editor = workspace.active_item_as::<Editor>(cx).unwrap();
+            let (count, snapshot) = active_editor.update(cx, |editor, cx| {
+                (editor.selections.count(), editor.snapshot(window, cx))
+            });
+            assert_eq!(count, 1);
+            let selections = active_editor
+                .read(cx)
+                .selections
+                .newest::<language::Point>(&snapshot.display_snapshot);
+            assert_eq!(
+                selections.head().row,
+                2,
+                "Expected cursor on row 3 (0-indexed: 2)"
+            );
+            assert_eq!(selections.head().column, 0, "Expected cursor on column 0");
+        });
+    }
+
+    #[gpui::test]
+    async fn test_hover_filename_with_non_numeric_suffix(cx: &mut gpui::TestAppContext) {
+        init_test(cx, |_| {});
+        let mut cx = EditorLspTestContext::new_rust(
+            lsp::ServerCapabilities {
+                ..Default::default()
+            },
+            cx,
+        )
+        .await;
+
+        let fs = cx.update_workspace(|workspace, _, cx| workspace.project().read(cx).fs().clone());
+        fs.as_fake()
+            .insert_file(
+                path!("/root/dir/file2.rs"),
+                "line 1\nline 2\nline 3\n".as_bytes().to_vec(),
+            )
+            .await;
+
+        // file2.rs:2:in should resolve to file2.rs line 2 (like Ruby backtraces)
+        cx.set_state(indoc! {"
+            Error at file2.rs:2:in 'method'ˇ
+        "});
+
+        let screen_coord = cx.pixel_position(indoc! {"
+            Error at filˇe2.rs:2:in 'method'
+        "});
+
+        cx.simulate_mouse_move(screen_coord, None, Modifiers::secondary_key());
+        cx.assert_editor_text_highlights(
+            HighlightKey::HoveredLinkState,
+            indoc! {"
+            Error at «file2.rs:2:inˇ» 'method'
+        "},
+        );
+
+        cx.simulate_click(screen_coord, Modifiers::secondary_key());
+
+        cx.update_workspace(|workspace, window, cx| {
+            let active_editor = workspace.active_item_as::<Editor>(cx).unwrap();
+            let (count, snapshot) = active_editor.update(cx, |editor, cx| {
+                (editor.selections.count(), editor.snapshot(window, cx))
+            });
+            assert_eq!(count, 1);
+            let selections = active_editor
+                .read(cx)
+                .selections
+                .newest::<language::Point>(&snapshot.display_snapshot);
+            assert_eq!(
+                selections.head().row,
+                1,
+                "Expected cursor on row 2 (0-indexed: 1)"
+            );
+        });
+    }
+
+    #[gpui::test]
+    async fn test_hover_markdown_link_with_row_column(cx: &mut gpui::TestAppContext) {
+        init_test(cx, |_| {});
+        let mut cx = EditorLspTestContext::new_rust(
+            lsp::ServerCapabilities {
+                ..Default::default()
+            },
+            cx,
+        )
+        .await;
+
+        let fs = cx.update_workspace(|workspace, _, cx| workspace.project().read(cx).fs().clone());
+        fs.as_fake()
+            .insert_file(
+                path!("/root/dir/file2.rs"),
+                "line 1\nline 2\nline 3\nline 4\nline 5\n"
+                    .as_bytes()
+                    .to_vec(),
+            )
+            .await;
+
+        // Markdown link [text](file2.rs:3:2) should highlight only the inner link,
+        // not the surrounding markdown syntax.
+        cx.set_state(indoc! {"
+            See [here](file2.rs:3:2) for details.ˇ
+        "});
+
+        let screen_coord = cx.pixel_position(indoc! {"
+            See [here](filˇe2.rs:3:2) for details.
+        "});
+
+        cx.simulate_mouse_move(screen_coord, None, Modifiers::secondary_key());
+        cx.assert_editor_text_highlights(
+            HighlightKey::HoveredLinkState,
+            indoc! {"
+            See [here](«file2.rs:3:2ˇ») for details.
+        "},
+        );
+
+        cx.simulate_click(screen_coord, Modifiers::secondary_key());
+
+        cx.update_workspace(|workspace, window, cx| {
+            let active_editor = workspace.active_item_as::<Editor>(cx).unwrap();
+            {
+                let editor = active_editor.read(cx);
+                let buffer = editor.buffer().read(cx).as_singleton().unwrap();
+                let file = buffer.read(cx).file().unwrap();
+                let file_path = file.as_local().unwrap().abs_path(cx);
+                assert_eq!(
+                    file_path,
+                    std::path::PathBuf::from(path!("/root/dir/file2.rs"))
+                );
+            }
+
+            // Check cursor is at row 3, column 2 (0-indexed: row 2, col 1)
+            let (count, snapshot) = active_editor.update(cx, |editor, cx| {
+                (editor.selections.count(), editor.snapshot(window, cx))
+            });
+            assert_eq!(count, 1);
+            let selections = active_editor
+                .read(cx)
+                .selections
+                .newest::<language::Point>(&snapshot.display_snapshot);
+            assert_eq!(
+                selections.head().row,
+                2,
+                "Expected cursor on row 3 (0-indexed: 2)"
+            );
+            assert_eq!(
+                selections.head().column,
+                1,
+                "Expected cursor on column 2 (0-indexed: 1)"
+            );
+        });
+    }
+
     #[gpui::test]
     async fn test_hover_directories(cx: &mut gpui::TestAppContext) {
         init_test(cx, |_| {});

crates/editor/src/items.rs

@@ -101,6 +101,10 @@ impl FollowableItem for Editor {
                 .await
                 .debug_assert_ok("leaders don't share views for unshared buffers")?;
 
+            let path_excerpts =
+                deserialize_path_excerpts_and_wait_for_anchors(state.path_excerpts, &buffers, cx)
+                    .await?;
+
             let editor = cx.update(|window, cx| {
                 let multibuffer = cx.new(|cx| {
                     let mut multibuffer;
@@ -108,27 +112,13 @@ impl FollowableItem for Editor {
                         multibuffer = MultiBuffer::singleton(buffers.pop().unwrap(), cx)
                     } else {
                         multibuffer = MultiBuffer::new(project.read(cx).capability());
-                        for path_with_ranges in state.path_excerpts {
-                            let Some(path_key) =
-                                path_with_ranges.path_key.and_then(deserialize_path_key)
-                            else {
-                                continue;
-                            };
-                            let Some(buffer_id) = BufferId::new(path_with_ranges.buffer_id).ok()
-                            else {
-                                continue;
-                            };
+                        for (path_key, buffer_id, ranges) in path_excerpts {
                             let Some(buffer) =
                                 buffers.iter().find(|b| b.read(cx).remote_id() == buffer_id)
                             else {
                                 continue;
                             };
                             let buffer_snapshot = buffer.read(cx).snapshot();
-                            let ranges = path_with_ranges
-                                .ranges
-                                .into_iter()
-                                .filter_map(deserialize_excerpt_range)
-                                .collect::<Vec<_>>();
                             multibuffer.update_path_excerpts(
                                 path_key,
                                 buffer.clone(),
@@ -402,25 +392,20 @@ async fn update_editor_from_message(
             .map(|id| BufferId::new(id).map(|id| project.open_buffer_by_id(id, cx)))
             .collect::<Result<Vec<_>>>()
     })?;
-    let _inserted_excerpt_buffers = try_join_all(inserted_excerpt_buffers).await?;
+    let inserted_excerpt_buffers = try_join_all(inserted_excerpt_buffers).await?;
+
+    let updated_paths = deserialize_path_excerpts_and_wait_for_anchors(
+        message.updated_paths,
+        &inserted_excerpt_buffers,
+        cx,
+    )
+    .await?;
 
     // Update the editor's excerpts.
     let buffer_snapshot = this.update(cx, |editor, cx| {
         editor.buffer.update(cx, |multibuffer, cx| {
-            for path_with_excerpts in message.updated_paths {
-                let Some(path_key) = path_with_excerpts.path_key.and_then(deserialize_path_key)
-                else {
-                    continue;
-                };
-                let ranges = path_with_excerpts
-                    .ranges
-                    .into_iter()
-                    .filter_map(deserialize_excerpt_range)
-                    .collect::<Vec<_>>();
-                let Some(buffer) = BufferId::new(path_with_excerpts.buffer_id)
-                    .ok()
-                    .and_then(|buffer_id| project.read(cx).buffer_for_id(buffer_id, cx))
-                else {
+            for (path_key, buffer_id, ranges) in updated_paths {
+                let Some(buffer) = project.read(cx).buffer_for_id(buffer_id, cx) else {
                     continue;
                 };
 
@@ -539,6 +524,56 @@ fn serialize_excerpt_range(range: ExcerptRange<language::Anchor>) -> proto::Exce
     }
 }
 
+async fn deserialize_path_excerpts_and_wait_for_anchors(
+    path_excerpts: Vec<proto::PathExcerpts>,
+    buffers: &[Entity<Buffer>],
+    cx: &mut AsyncWindowContext,
+) -> Result<Vec<(PathKey, BufferId, Vec<ExcerptRange<language::Anchor>>)>> {
+    let path_excerpts = path_excerpts
+        .into_iter()
+        .filter_map(|path_with_ranges| {
+            let path_key = path_with_ranges.path_key.and_then(deserialize_path_key)?;
+            let buffer_id = BufferId::new(path_with_ranges.buffer_id).ok()?;
+            let ranges = path_with_ranges
+                .ranges
+                .into_iter()
+                .filter_map(deserialize_excerpt_range)
+                .collect::<Vec<_>>();
+            Some((path_key, buffer_id, ranges))
+        })
+        .collect::<Vec<_>>();
+
+    let wait_for_anchors = cx.update(|_, cx| {
+        buffers
+            .iter()
+            .map(|buffer| {
+                let buffer_id = buffer.read(cx).remote_id();
+                let anchors = path_excerpts
+                    .iter()
+                    .filter(|(_, id, _)| *id == buffer_id)
+                    .flat_map(|(_, _, ranges)| {
+                        ranges.iter().flat_map(|range| {
+                            [
+                                range.context.start,
+                                range.context.end,
+                                range.primary.start,
+                                range.primary.end,
+                            ]
+                        })
+                    })
+                    .collect::<Vec<_>>();
+                buffer.update(cx, |buffer, _| buffer.wait_for_anchors(anchors))
+            })
+            .collect::<Vec<_>>()
+    })?;
+    // Without this wait, resolving these anchors later can race ahead of the
+    // leader's pending buffer ops and trip `panic_bad_anchor` on a stale
+    // snapshot.
+    try_join_all(wait_for_anchors).await?;
+
+    Ok(path_excerpts)
+}
+
 fn deserialize_excerpt_range(
     excerpt_range: proto::ExcerptRange,
 ) -> Option<ExcerptRange<language::Anchor>> {

crates/editor/src/rewrap.rs

@@ -0,0 +1,782 @@
+use super::*;
+
+impl Editor {
+    pub fn rewrap(&mut self, options: RewrapOptions, cx: &mut Context<Self>) {
+        if self.read_only(cx) || self.mode.is_single_line() {
+            return;
+        }
+        let buffer = self.buffer.read(cx).snapshot(cx);
+        let selections = self.selections.all::<Point>(&self.display_snapshot(cx));
+
+        #[derive(Clone, Debug, PartialEq)]
+        enum CommentFormat {
+            /// single line comment, with prefix for line
+            Line(String),
+            /// single line within a block comment, with prefix for line
+            BlockLine(String),
+            /// a single line of a block comment that includes the initial delimiter
+            BlockCommentWithStart(BlockCommentConfig),
+            /// a single line of a block comment that includes the ending delimiter
+            BlockCommentWithEnd(BlockCommentConfig),
+        }
+
+        // Split selections to respect paragraph, indent, and comment prefix boundaries.
+        let wrap_ranges = selections.into_iter().flat_map(|selection| {
+            let language_settings = buffer.language_settings_at(selection.head(), cx);
+            let language_scope = buffer.language_scope_at(selection.head());
+
+            let indent_and_prefix_for_row =
+                |row: u32| -> (IndentSize, Option<CommentFormat>, Option<String>) {
+                    let indent = buffer.indent_size_for_line(MultiBufferRow(row));
+                    let (comment_prefix, rewrap_prefix) = if let Some(language_scope) =
+                        &language_scope
+                    {
+                        let indent_end = Point::new(row, indent.len);
+                        let line_end = Point::new(row, buffer.line_len(MultiBufferRow(row)));
+                        let line_text_after_indent = buffer
+                            .text_for_range(indent_end..line_end)
+                            .collect::<String>();
+
+                        let is_within_comment_override = buffer
+                            .language_scope_at(indent_end)
+                            .is_some_and(|scope| scope.override_name() == Some("comment"));
+                        let comment_delimiters = if is_within_comment_override {
+                            // we are within a comment syntax node, but we don't
+                            // yet know what kind of comment: block, doc or line
+                            match (
+                                language_scope.documentation_comment(),
+                                language_scope.block_comment(),
+                            ) {
+                                (Some(config), _) | (_, Some(config))
+                                    if buffer.contains_str_at(indent_end, &config.start) =>
+                                {
+                                    Some(CommentFormat::BlockCommentWithStart(config.clone()))
+                                }
+                                (Some(config), _) | (_, Some(config))
+                                    if line_text_after_indent.ends_with(config.end.as_ref()) =>
+                                {
+                                    Some(CommentFormat::BlockCommentWithEnd(config.clone()))
+                                }
+                                (Some(config), _) | (_, Some(config))
+                                    if !config.prefix.is_empty()
+                                        && buffer.contains_str_at(indent_end, &config.prefix) =>
+                                {
+                                    Some(CommentFormat::BlockLine(config.prefix.to_string()))
+                                }
+                                (_, _) => language_scope
+                                    .line_comment_prefixes()
+                                    .iter()
+                                    .find(|prefix| buffer.contains_str_at(indent_end, prefix))
+                                    .map(|prefix| CommentFormat::Line(prefix.to_string())),
+                            }
+                        } else {
+                            // we not in an overridden comment node, but we may
+                            // be within a non-overridden line comment node
+                            language_scope
+                                .line_comment_prefixes()
+                                .iter()
+                                .find(|prefix| buffer.contains_str_at(indent_end, prefix))
+                                .map(|prefix| CommentFormat::Line(prefix.to_string()))
+                        };
+
+                        let rewrap_prefix = language_scope
+                            .rewrap_prefixes()
+                            .iter()
+                            .find_map(|prefix_regex| {
+                                prefix_regex.find(&line_text_after_indent).map(|mat| {
+                                    if mat.start() == 0 {
+                                        Some(mat.as_str().to_string())
+                                    } else {
+                                        None
+                                    }
+                                })
+                            })
+                            .flatten();
+                        (comment_delimiters, rewrap_prefix)
+                    } else {
+                        (None, None)
+                    };
+                    (indent, comment_prefix, rewrap_prefix)
+                };
+
+            let mut start_row = selection.start.row;
+            let mut end_row = selection.end.row;
+
+            if selection.is_empty() {
+                let cursor_row = selection.start.row;
+
+                let (mut indent_size, comment_prefix, _) = indent_and_prefix_for_row(cursor_row);
+                let line_prefix = match &comment_prefix {
+                    Some(CommentFormat::Line(prefix) | CommentFormat::BlockLine(prefix)) => {
+                        Some(prefix.as_str())
+                    }
+                    Some(CommentFormat::BlockCommentWithEnd(BlockCommentConfig {
+                        prefix, ..
+                    })) => Some(prefix.as_ref()),
+                    Some(CommentFormat::BlockCommentWithStart(BlockCommentConfig {
+                        start: _,
+                        end: _,
+                        prefix,
+                        tab_size,
+                    })) => {
+                        indent_size.len += tab_size;
+                        Some(prefix.as_ref())
+                    }
+                    None => None,
+                };
+                let indent_prefix = indent_size.chars().collect::<String>();
+                let line_prefix = format!("{indent_prefix}{}", line_prefix.unwrap_or(""));
+
+                'expand_upwards: while start_row > 0 {
+                    let prev_row = start_row - 1;
+                    if buffer.contains_str_at(Point::new(prev_row, 0), &line_prefix)
+                        && buffer.line_len(MultiBufferRow(prev_row)) as usize > line_prefix.len()
+                        && !buffer.is_line_blank(MultiBufferRow(prev_row))
+                    {
+                        start_row = prev_row;
+                    } else {
+                        break 'expand_upwards;
+                    }
+                }
+
+                'expand_downwards: while end_row < buffer.max_point().row {
+                    let next_row = end_row + 1;
+                    if buffer.contains_str_at(Point::new(next_row, 0), &line_prefix)
+                        && buffer.line_len(MultiBufferRow(next_row)) as usize > line_prefix.len()
+                        && !buffer.is_line_blank(MultiBufferRow(next_row))
+                    {
+                        end_row = next_row;
+                    } else {
+                        break 'expand_downwards;
+                    }
+                }
+            }
+
+            let mut non_blank_rows_iter = (start_row..=end_row)
+                .filter(|row| !buffer.is_line_blank(MultiBufferRow(*row)))
+                .peekable();
+
+            let first_row = if let Some(&row) = non_blank_rows_iter.peek() {
+                row
+            } else {
+                return Vec::new();
+            };
+
+            let mut ranges = Vec::new();
+
+            let mut current_range_start = first_row;
+            let mut prev_row = first_row;
+            let (
+                mut current_range_indent,
+                mut current_range_comment_delimiters,
+                mut current_range_rewrap_prefix,
+            ) = indent_and_prefix_for_row(first_row);
+
+            for row in non_blank_rows_iter.skip(1) {
+                let has_paragraph_break = row > prev_row + 1;
+
+                let (row_indent, row_comment_delimiters, row_rewrap_prefix) =
+                    indent_and_prefix_for_row(row);
+
+                let has_indent_change = row_indent != current_range_indent;
+                let has_comment_change = row_comment_delimiters != current_range_comment_delimiters;
+
+                let has_boundary_change = has_comment_change
+                    || row_rewrap_prefix.is_some()
+                    || (has_indent_change && current_range_comment_delimiters.is_some());
+
+                if has_paragraph_break || has_boundary_change {
+                    ranges.push((
+                        language_settings.clone(),
+                        Point::new(current_range_start, 0)
+                            ..Point::new(prev_row, buffer.line_len(MultiBufferRow(prev_row))),
+                        current_range_indent,
+                        current_range_comment_delimiters.clone(),
+                        current_range_rewrap_prefix.clone(),
+                    ));
+                    current_range_start = row;
+                    current_range_indent = row_indent;
+                    current_range_comment_delimiters = row_comment_delimiters;
+                    current_range_rewrap_prefix = row_rewrap_prefix;
+                }
+                prev_row = row;
+            }
+
+            ranges.push((
+                language_settings.clone(),
+                Point::new(current_range_start, 0)
+                    ..Point::new(prev_row, buffer.line_len(MultiBufferRow(prev_row))),
+                current_range_indent,
+                current_range_comment_delimiters,
+                current_range_rewrap_prefix,
+            ));
+
+            ranges
+        });
+
+        let mut edits = Vec::new();
+        let mut rewrapped_row_ranges = Vec::<RangeInclusive<u32>>::new();
+
+        for (language_settings, wrap_range, mut indent_size, comment_prefix, rewrap_prefix) in
+            wrap_ranges
+        {
+            let start_row = wrap_range.start.row;
+            let end_row = wrap_range.end.row;
+
+            // Skip selections that overlap with a range that has already been rewrapped.
+            let selection_range = start_row..end_row;
+            if rewrapped_row_ranges
+                .iter()
+                .any(|range| range.overlaps(&selection_range))
+            {
+                continue;
+            }
+
+            let tab_size = language_settings.tab_size;
+
+            let (line_prefix, inside_comment) = match &comment_prefix {
+                Some(CommentFormat::Line(prefix) | CommentFormat::BlockLine(prefix)) => {
+                    (Some(prefix.as_str()), true)
+                }
+                Some(CommentFormat::BlockCommentWithEnd(BlockCommentConfig { prefix, .. })) => {
+                    (Some(prefix.as_ref()), true)
+                }
+                Some(CommentFormat::BlockCommentWithStart(BlockCommentConfig {
+                    start: _,
+                    end: _,
+                    prefix,
+                    tab_size,
+                })) => {
+                    indent_size.len += tab_size;
+                    (Some(prefix.as_ref()), true)
+                }
+                None => (None, false),
+            };
+            let indent_prefix = indent_size.chars().collect::<String>();
+            let line_prefix = format!("{indent_prefix}{}", line_prefix.unwrap_or(""));
+
+            let allow_rewrap_based_on_language = match language_settings.allow_rewrap {
+                RewrapBehavior::InComments => inside_comment,
+                RewrapBehavior::InSelections => !wrap_range.is_empty(),
+                RewrapBehavior::Anywhere => true,
+            };
+
+            let should_rewrap = options.override_language_settings
+                || allow_rewrap_based_on_language
+                || self.hard_wrap.is_some();
+            if !should_rewrap {
+                continue;
+            }
+
+            let start = Point::new(start_row, 0);
+            let start_offset = ToOffset::to_offset(&start, &buffer);
+            let end = Point::new(end_row, buffer.line_len(MultiBufferRow(end_row)));
+            let selection_text = buffer.text_for_range(start..end).collect::<String>();
+            let mut first_line_delimiter = None;
+            let mut last_line_delimiter = None;
+            let Some(lines_without_prefixes) = selection_text
+                .lines()
+                .enumerate()
+                .map(|(ix, line)| {
+                    let line_trimmed = line.trim_start();
+                    if rewrap_prefix.is_some() && ix > 0 {
+                        Ok(line_trimmed)
+                    } else if let Some(
+                        CommentFormat::BlockCommentWithStart(BlockCommentConfig {
+                            start,
+                            prefix,
+                            end,
+                            tab_size,
+                        })
+                        | CommentFormat::BlockCommentWithEnd(BlockCommentConfig {
+                            start,
+                            prefix,
+                            end,
+                            tab_size,
+                        }),
+                    ) = &comment_prefix
+                    {
+                        let line_trimmed = line_trimmed
+                            .strip_prefix(start.as_ref())
+                            .map(|s| {
+                                let mut indent_size = indent_size;
+                                indent_size.len -= tab_size;
+                                let indent_prefix: String = indent_size.chars().collect();
+                                first_line_delimiter = Some((indent_prefix, start));
+                                s.trim_start()
+                            })
+                            .unwrap_or(line_trimmed);
+                        let line_trimmed = line_trimmed
+                            .strip_suffix(end.as_ref())
+                            .map(|s| {
+                                last_line_delimiter = Some(end);
+                                s.trim_end()
+                            })
+                            .unwrap_or(line_trimmed);
+                        let line_trimmed = line_trimmed
+                            .strip_prefix(prefix.as_ref())
+                            .unwrap_or(line_trimmed);
+                        Ok(line_trimmed)
+                    } else if let Some(CommentFormat::BlockLine(prefix)) = &comment_prefix {
+                        line_trimmed.strip_prefix(prefix).with_context(|| {
+                            format!("line did not start with prefix {prefix:?}: {line:?}")
+                        })
+                    } else {
+                        line_trimmed
+                            .strip_prefix(&line_prefix.trim_start())
+                            .with_context(|| {
+                                format!("line did not start with prefix {line_prefix:?}: {line:?}")
+                            })
+                    }
+                })
+                .collect::<Result<Vec<_>, _>>()
+                .log_err()
+            else {
+                continue;
+            };
+
+            let wrap_column = options.line_length.or(self.hard_wrap).unwrap_or_else(|| {
+                buffer
+                    .language_settings_at(Point::new(start_row, 0), cx)
+                    .preferred_line_length as usize
+            });
+
+            let subsequent_lines_prefix = if let Some(rewrap_prefix_str) = &rewrap_prefix {
+                format!("{}{}", indent_prefix, " ".repeat(rewrap_prefix_str.len()))
+            } else {
+                line_prefix.clone()
+            };
+
+            let wrapped_text = {
+                let mut wrapped_text = wrap_with_prefix(
+                    line_prefix,
+                    subsequent_lines_prefix,
+                    lines_without_prefixes.join("\n"),
+                    wrap_column,
+                    tab_size,
+                    options.preserve_existing_whitespace,
+                );
+
+                if let Some((indent, delimiter)) = first_line_delimiter {
+                    wrapped_text = format!("{indent}{delimiter}\n{wrapped_text}");
+                }
+                if let Some(last_line) = last_line_delimiter {
+                    wrapped_text = format!("{wrapped_text}\n{indent_prefix}{last_line}");
+                }
+
+                wrapped_text
+            };
+
+            // TODO: should always use char-based diff while still supporting cursor behavior that
+            // matches vim.
+            let mut diff_options = DiffOptions::default();
+            if options.override_language_settings {
+                diff_options.max_word_diff_len = 0;
+                diff_options.max_word_diff_line_count = 0;
+            } else {
+                diff_options.max_word_diff_len = usize::MAX;
+                diff_options.max_word_diff_line_count = usize::MAX;
+            }
+
+            for (old_range, new_text) in
+                text_diff_with_options(&selection_text, &wrapped_text, diff_options)
+            {
+                let edit_start = buffer.anchor_after(start_offset + old_range.start);
+                let edit_end = buffer.anchor_after(start_offset + old_range.end);
+                edits.push((edit_start..edit_end, new_text));
+            }
+
+            rewrapped_row_ranges.push(start_row..=end_row);
+        }
+
+        self.buffer
+            .update(cx, |buffer, cx| buffer.edit(edits, None, cx));
+    }
+}
+
+fn char_len_with_expanded_tabs(offset: usize, text: &str, tab_size: NonZeroU32) -> usize {
+    let tab_size = tab_size.get() as usize;
+    let mut width = offset;
+
+    for ch in text.chars() {
+        width += if ch == '\t' {
+            tab_size - (width % tab_size)
+        } else {
+            1
+        };
+    }
+
+    width - offset
+}
+
+/// Tokenizes a string into runs of text that should stick together, or that is whitespace.
+struct WordBreakingTokenizer<'a> {
+    input: &'a str,
+}
+
+impl<'a> WordBreakingTokenizer<'a> {
+    fn new(input: &'a str) -> Self {
+        Self { input }
+    }
+}
+
+fn is_char_ideographic(ch: char) -> bool {
+    use unicode_script::Script::*;
+    use unicode_script::UnicodeScript;
+    matches!(ch.script(), Han | Tangut | Yi)
+}
+
+fn is_grapheme_ideographic(text: &str) -> bool {
+    text.chars().any(is_char_ideographic)
+}
+
+fn is_grapheme_whitespace(text: &str) -> bool {
+    text.chars().any(|x| x.is_whitespace())
+}
+
+fn should_stay_with_preceding_ideograph(text: &str) -> bool {
+    text.chars()
+        .next()
+        .is_some_and(|ch| matches!(ch, '。' | '、' | '，' | '？' | '！' | '：' | '；' | '…'))
+}
+
+#[derive(PartialEq, Eq, Debug, Clone, Copy)]
+enum WordBreakToken<'a> {
+    Word { token: &'a str, grapheme_len: usize },
+    InlineWhitespace { token: &'a str, grapheme_len: usize },
+    Newline,
+}
+
+impl<'a> Iterator for WordBreakingTokenizer<'a> {
+    /// Yields a span, the count of graphemes in the token, and whether it was
+    /// whitespace. Note that it also breaks at word boundaries.
+    type Item = WordBreakToken<'a>;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        use unicode_segmentation::UnicodeSegmentation;
+        if self.input.is_empty() {
+            return None;
+        }
+
+        let mut iter = self.input.graphemes(true).peekable();
+        let mut offset = 0;
+        let mut grapheme_len = 0;
+        if let Some(first_grapheme) = iter.next() {
+            let is_newline = first_grapheme == "\n";
+            let is_whitespace = is_grapheme_whitespace(first_grapheme);
+            offset += first_grapheme.len();
+            grapheme_len += 1;
+            if is_grapheme_ideographic(first_grapheme) && !is_whitespace {
+                if let Some(grapheme) = iter.peek().copied()
+                    && should_stay_with_preceding_ideograph(grapheme)
+                {
+                    offset += grapheme.len();
+                    grapheme_len += 1;
+                }
+            } else {
+                let mut words = self.input[offset..].split_word_bound_indices().peekable();
+                let mut next_word_bound = words.peek().copied();
+                if next_word_bound.is_some_and(|(i, _)| i == 0) {
+                    next_word_bound = words.next();
+                }
+                while let Some(grapheme) = iter.peek().copied() {
+                    if next_word_bound.is_some_and(|(i, _)| i == offset) {
+                        break;
+                    };
+                    if is_grapheme_whitespace(grapheme) != is_whitespace
+                        || (grapheme == "\n") != is_newline
+                    {
+                        break;
+                    };
+                    offset += grapheme.len();
+                    grapheme_len += 1;
+                    iter.next();
+                }
+            }
+            let token = &self.input[..offset];
+            self.input = &self.input[offset..];
+            if token == "\n" {
+                Some(WordBreakToken::Newline)
+            } else if is_whitespace {
+                Some(WordBreakToken::InlineWhitespace {
+                    token,
+                    grapheme_len,
+                })
+            } else {
+                Some(WordBreakToken::Word {
+                    token,
+                    grapheme_len,
+                })
+            }
+        } else {
+            None
+        }
+    }
+}
+
+fn wrap_with_prefix(
+    first_line_prefix: String,
+    subsequent_lines_prefix: String,
+    unwrapped_text: String,
+    wrap_column: usize,
+    tab_size: NonZeroU32,
+    preserve_existing_whitespace: bool,
+) -> String {
+    let first_line_prefix_len = char_len_with_expanded_tabs(0, &first_line_prefix, tab_size);
+    let subsequent_lines_prefix_len =
+        char_len_with_expanded_tabs(0, &subsequent_lines_prefix, tab_size);
+    let mut wrapped_text = String::new();
+    let mut current_line = first_line_prefix;
+    let mut is_first_line = true;
+
+    let tokenizer = WordBreakingTokenizer::new(&unwrapped_text);
+    let mut current_line_len = first_line_prefix_len;
+    let mut in_whitespace = false;
+    for token in tokenizer {
+        let have_preceding_whitespace = in_whitespace;
+        match token {
+            WordBreakToken::Word {
+                token,
+                grapheme_len,
+            } => {
+                in_whitespace = false;
+                let current_prefix_len = if is_first_line {
+                    first_line_prefix_len
+                } else {
+                    subsequent_lines_prefix_len
+                };
+                if current_line_len + grapheme_len > wrap_column
+                    && current_line_len != current_prefix_len
+                {
+                    wrapped_text.push_str(current_line.trim_end());
+                    wrapped_text.push('\n');
+                    is_first_line = false;
+                    current_line = subsequent_lines_prefix.clone();
+                    current_line_len = subsequent_lines_prefix_len;
+                }
+                current_line.push_str(token);
+                current_line_len += grapheme_len;
+            }
+            WordBreakToken::InlineWhitespace {
+                mut token,
+                mut grapheme_len,
+            } => {
+                in_whitespace = true;
+                if have_preceding_whitespace && !preserve_existing_whitespace {
+                    continue;
+                }
+                if !preserve_existing_whitespace {
+                    // Keep a single whitespace grapheme as-is
+                    if let Some(first) =
+                        unicode_segmentation::UnicodeSegmentation::graphemes(token, true).next()
+                    {
+                        token = first;
+                    } else {
+                        token = " ";
+                    }
+                    grapheme_len = 1;
+                }
+                let current_prefix_len = if is_first_line {
+                    first_line_prefix_len
+                } else {
+                    subsequent_lines_prefix_len
+                };
+                if current_line_len + grapheme_len > wrap_column {
+                    wrapped_text.push_str(current_line.trim_end());
+                    wrapped_text.push('\n');
+                    is_first_line = false;
+                    current_line = subsequent_lines_prefix.clone();
+                    current_line_len = subsequent_lines_prefix_len;
+                } else if current_line_len != current_prefix_len || preserve_existing_whitespace {
+                    current_line.push_str(token);
+                    current_line_len += grapheme_len;
+                }
+            }
+            WordBreakToken::Newline => {
+                in_whitespace = true;
+                let current_prefix_len = if is_first_line {
+                    first_line_prefix_len
+                } else {
+                    subsequent_lines_prefix_len
+                };
+                if preserve_existing_whitespace {
+                    wrapped_text.push_str(current_line.trim_end());
+                    wrapped_text.push('\n');
+                    is_first_line = false;
+                    current_line = subsequent_lines_prefix.clone();
+                    current_line_len = subsequent_lines_prefix_len;
+                } else if have_preceding_whitespace {
+                    continue;
+                } else if current_line_len + 1 > wrap_column
+                    && current_line_len != current_prefix_len
+                {
+                    wrapped_text.push_str(current_line.trim_end());
+                    wrapped_text.push('\n');
+                    is_first_line = false;
+                    current_line = subsequent_lines_prefix.clone();
+                    current_line_len = subsequent_lines_prefix_len;
+                } else if current_line_len != current_prefix_len {
+                    current_line.push(' ');
+                    current_line_len += 1;
+                }
+            }
+        }
+    }
+
+    if !current_line.is_empty() {
+        wrapped_text.push_str(&current_line);
+    }
+    wrapped_text
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_string_size_with_expanded_tabs() {
+        let nz = |val| NonZeroU32::new(val).unwrap();
+        assert_eq!(char_len_with_expanded_tabs(0, "", nz(4)), 0);
+        assert_eq!(char_len_with_expanded_tabs(0, "hello", nz(4)), 5);
+        assert_eq!(char_len_with_expanded_tabs(0, "\thello", nz(4)), 9);
+        assert_eq!(char_len_with_expanded_tabs(0, "abc\tab", nz(4)), 6);
+        assert_eq!(char_len_with_expanded_tabs(0, "hello\t", nz(4)), 8);
+        assert_eq!(char_len_with_expanded_tabs(0, "\t\t", nz(8)), 16);
+        assert_eq!(char_len_with_expanded_tabs(0, "x\t", nz(8)), 8);
+        assert_eq!(char_len_with_expanded_tabs(7, "x\t", nz(8)), 9);
+    }
+
+    #[test]
+    fn test_word_breaking_tokenizer() {
+        let tests: &[(&str, &[WordBreakToken<'static>])] = &[
+            ("", &[]),
+            ("  ", &[whitespace("  ", 2)]),
+            ("Ʒ", &[word("Ʒ", 1)]),
+            ("Ǽ", &[word("Ǽ", 1)]),
+            ("⋑", &[word("⋑", 1)]),
+            ("⋑⋑", &[word("⋑⋑", 2)]),
+            (
+                "原理，进而",
+                &[word("原", 1), word("理，", 2), word("进", 1), word("而", 1)],
+            ),
+            (
+                "hello world",
+                &[word("hello", 5), whitespace(" ", 1), word("world", 5)],
+            ),
+            (
+                "hello, world",
+                &[word("hello,", 6), whitespace(" ", 1), word("world", 5)],
+            ),
+            (
+                "  hello world",
+                &[
+                    whitespace("  ", 2),
+                    word("hello", 5),
+                    whitespace(" ", 1),
+                    word("world", 5),
+                ],
+            ),
+            (
+                "这是什么 \n 钢笔",
+                &[
+                    word("这", 1),
+                    word("是", 1),
+                    word("什", 1),
+                    word("么", 1),
+                    whitespace(" ", 1),
+                    newline(),
+                    whitespace(" ", 1),
+                    word("钢", 1),
+                    word("笔", 1),
+                ],
+            ),
+            (" mutton", &[whitespace(" ", 1), word("mutton", 6)]),
+        ];
+
+        fn word(token: &'static str, grapheme_len: usize) -> WordBreakToken<'static> {
+            WordBreakToken::Word {
+                token,
+                grapheme_len,
+            }
+        }
+
+        fn whitespace(token: &'static str, grapheme_len: usize) -> WordBreakToken<'static> {
+            WordBreakToken::InlineWhitespace {
+                token,
+                grapheme_len,
+            }
+        }
+
+        fn newline() -> WordBreakToken<'static> {
+            WordBreakToken::Newline
+        }
+
+        for (input, result) in tests {
+            assert_eq!(
+                WordBreakingTokenizer::new(input)
+                    .collect::<Vec<_>>()
+                    .as_slice(),
+                *result,
+            );
+        }
+    }
+
+    #[test]
+    fn test_wrap_with_prefix() {
+        assert_eq!(
+            wrap_with_prefix(
+                "# ".to_string(),
+                "# ".to_string(),
+                "abcdefg".to_string(),
+                4,
+                NonZeroU32::new(4).unwrap(),
+                false,
+            ),
+            "# abcdefg"
+        );
+        assert_eq!(
+            wrap_with_prefix(
+                "".to_string(),
+                "".to_string(),
+                "\thello world".to_string(),
+                8,
+                NonZeroU32::new(4).unwrap(),
+                false,
+            ),
+            "hello\nworld"
+        );
+        assert_eq!(
+            wrap_with_prefix(
+                "// ".to_string(),
+                "// ".to_string(),
+                "xx \nyy zz aa bb cc".to_string(),
+                12,
+                NonZeroU32::new(4).unwrap(),
+                false,
+            ),
+            "// xx yy zz\n// aa bb cc"
+        );
+        assert_eq!(
+            wrap_with_prefix(
+                String::new(),
+                String::new(),
+                "这是什么 \n 钢笔".to_string(),
+                3,
+                NonZeroU32::new(4).unwrap(),
+                false,
+            ),
+            "这是什\n么 钢\n笔"
+        );
+        assert_eq!(
+            wrap_with_prefix(
+                String::new(),
+                String::new(),
+                format!("foo{}bar", '\u{2009}'), // thin space
+                80,
+                NonZeroU32::new(4).unwrap(),
+                false,
+            ),
+            format!("foo{}bar", '\u{2009}')
+        );
+    }
+}

crates/eval_cli/src/headless.rs

@@ -70,6 +70,7 @@ pub fn init(cx: &mut App) -> Arc<AgentCliAppState> {
         git_binary_path,
         cx.background_executor().clone(),
     ));
+    <dyn fs::Fs>::set_global(fs.clone(), cx);
 
     let mut languages = LanguageRegistry::new(cx.background_executor().clone());
     languages.set_language_server_download_dir(paths::languages_dir().clone());

crates/extension/src/extension_builder.rs

@@ -28,23 +28,15 @@ const RUST_TARGET: &str = "wasm32-wasip2";
 /// Once Clang 17 and its wasm target are available via system package managers, we won't need
 /// to download this.
 const WASI_SDK_URL: &str = "https://github.com/WebAssembly/wasi-sdk/releases/download/wasi-sdk-25/";
-const WASI_SDK_ASSET_NAME: Option<&str> = if cfg!(all(target_os = "macos", target_arch = "x86_64"))
-{
-    Some("wasi-sdk-25.0-x86_64-macos.tar.gz")
-} else if cfg!(all(target_os = "macos", target_arch = "aarch64")) {
-    Some("wasi-sdk-25.0-arm64-macos.tar.gz")
-} else if cfg!(all(target_os = "linux", target_arch = "x86_64")) {
-    Some("wasi-sdk-25.0-x86_64-linux.tar.gz")
-} else if cfg!(all(target_os = "linux", target_arch = "aarch64")) {
-    Some("wasi-sdk-25.0-arm64-linux.tar.gz")
-} else if cfg!(all(target_os = "freebsd", target_arch = "x86_64")) {
-    Some("wasi-sdk-25.0-x86_64-linux.tar.gz")
-} else if cfg!(all(target_os = "freebsd", target_arch = "aarch64")) {
-    Some("wasi-sdk-25.0-arm64-linux.tar.gz")
-} else if cfg!(all(target_os = "windows", target_arch = "x86_64")) {
-    Some("wasi-sdk-25.0-x86_64-windows.tar.gz")
-} else {
-    None
+const WASI_SDK_ASSET_NAME: Option<&str> = cfg_select! {
+    all(target_os = "macos", target_arch = "x86_64") => Some("wasi-sdk-25.0-x86_64-macos.tar.gz"),
+    all(target_os = "macos", target_arch = "aarch64") => Some("wasi-sdk-25.0-arm64-macos.tar.gz"),
+    all(target_os = "linux", target_arch = "x86_64") => Some("wasi-sdk-25.0-x86_64-linux.tar.gz"),
+    all(target_os = "linux", target_arch = "aarch64") => Some("wasi-sdk-25.0-arm64-linux.tar.gz"),
+    all(target_os = "freebsd", target_arch = "x86_64") => Some("wasi-sdk-25.0-x86_64-linux.tar.gz"),
+    all(target_os = "freebsd", target_arch = "aarch64") => Some("wasi-sdk-25.0-arm64-linux.tar.gz"),
+    all(target_os = "windows", target_arch = "x86_64") => Some("wasi-sdk-25.0-x86_64-windows.tar.gz"),
+    _ => None
 };
 
 pub struct ExtensionBuilder {

crates/extension_host/src/extension_host.rs

@@ -19,7 +19,7 @@ use extension::{
     ExtensionGrammarProxy, ExtensionHostProxy, ExtensionLanguageProxy,
     ExtensionLanguageServerProxy, ExtensionSnippetProxy, ExtensionThemeProxy,
 };
-use fs::{Fs, RemoveOptions};
+use fs::{Fs, RemoveOptions, RenameOptions};
 use futures::future::join_all;
 use futures::{
     AsyncReadExt as _, Future, FutureExt as _, StreamExt as _,
@@ -77,7 +77,7 @@ const CURRENT_SCHEMA_VERSION: SchemaVersion = SchemaVersion(1);
 ///
 /// These snippets should no longer be downloaded or loaded, because their
 /// functionality has been integrated into the core editor.
-const SUPPRESSED_EXTENSIONS: &[&str] = &["snippets", "ruff", "ty", "basedpyright"];
+const SUPPRESSED_EXTENSIONS: &[&str] = &["snippets", "ruff", "ty", "basedpyright", "basher"];
 
 /// Returns the [`SchemaVersion`] range that is compatible with this version of Zed.
 pub fn schema_version_range() -> RangeInclusive<SchemaVersion> {
@@ -726,41 +726,67 @@ impl ExtensionStore {
                 }
             });
 
-            let mut response = http_client
-                .get(url.as_ref(), Default::default(), true)
-                .await
-                .context("downloading extension")?;
+            cx.background_spawn(async move {
+                let mut response = http_client
+                    .get(url.as_ref(), Default::default(), true)
+                    .await
+                    .context("downloading extension")?;
 
-            fs.remove_dir(
-                &extension_dir,
-                RemoveOptions {
-                    recursive: true,
-                    ignore_if_not_exists: true,
-                },
-            )
+                let content_length = response
+                    .headers()
+                    .get(http_client::http::header::CONTENT_LENGTH)
+                    .and_then(|value| value.to_str().ok()?.parse::<usize>().ok());
+
+                let mut body = BufReader::new(response.body_mut());
+                let mut tar_gz_bytes = Vec::new();
+                body.read_to_end(&mut tar_gz_bytes).await?;
+
+                if let Some(content_length) = content_length {
+                    let actual_len = tar_gz_bytes.len();
+                    if content_length != actual_len {
+                        bail!(
+                            "downloaded extension size {actual_len} \
+                        does not match content length {content_length}"
+                        );
+                    }
+                }
+
+                let decompressed_bytes = GzipDecoder::new(BufReader::new(tar_gz_bytes.as_slice()));
+                let archive = Archive::new(decompressed_bytes);
+
+                let remove_dir = || {
+                    fs.remove_dir(
+                        &extension_dir,
+                        RemoveOptions {
+                            recursive: true,
+                            ignore_if_not_exists: true,
+                        },
+                    )
+                };
+
+                match tempfile::tempdir_in(paths::temp_dir()).or_else(|_| tempfile::tempdir()) {
+                    Ok(temp_dir) => {
+                        archive.unpack(temp_dir.path()).await?;
+                        remove_dir().await?;
+                        fs.rename(
+                            temp_dir.path(),
+                            &extension_dir,
+                            RenameOptions {
+                                overwrite: true,
+                                ignore_if_exists: true,
+                                create_parents: true,
+                            },
+                        )
+                        .await
+                    }
+                    Err(_) => {
+                        remove_dir().await?;
+                        archive.unpack(extension_dir).await.map_err(Into::into)
+                    }
+                }
+            })
             .await?;
 
-            let content_length = response
-                .headers()
-                .get(http_client::http::header::CONTENT_LENGTH)
-                .and_then(|value| value.to_str().ok()?.parse::<usize>().ok());
-
-            let mut body = BufReader::new(response.body_mut());
-            let mut tar_gz_bytes = Vec::new();
-            body.read_to_end(&mut tar_gz_bytes).await?;
-
-            if let Some(content_length) = content_length {
-                let actual_len = tar_gz_bytes.len();
-                if content_length != actual_len {
-                    bail!(concat!(
-                        "downloaded extension size {actual_len} ",
-                        "does not match content length {content_length}"
-                    ));
-                }
-            }
-            let decompressed_bytes = GzipDecoder::new(BufReader::new(tar_gz_bytes.as_slice()));
-            let archive = Archive::new(decompressed_bytes);
-            archive.unpack(extension_dir).await?;
             this.update(cx, |this, cx| this.reload(Some(extension_id.clone()), cx))?
                 .await;
 

crates/fs/src/fake_git_repo.rs

@@ -72,6 +72,7 @@ pub struct FakeGitRepositoryState {
     pub simulated_index_write_error_message: Option<String>,
     pub simulated_create_worktree_error: Option<String>,
     pub simulated_graph_error: Option<String>,
+    pub branches_requiring_force_delete: HashSet<String>,
     pub refs: HashMap<String, String>,
     pub graph_commits: Vec<Arc<InitialGraphCommitData>>,
     pub commit_data: HashMap<Oid, FakeCommitDataEntry>,
@@ -91,6 +92,7 @@ impl FakeGitRepositoryState {
             simulated_index_write_error_message: Default::default(),
             simulated_create_worktree_error: Default::default(),
             simulated_graph_error: None,
+            branches_requiring_force_delete: Default::default(),
             refs: HashMap::from_iter([("HEAD".into(), "abc".into())]),
             merge_base_contents: Default::default(),
             oids: Default::default(),
@@ -888,11 +890,22 @@ impl GitRepository for FakeGitRepository {
         })
     }
 
-    fn delete_branch(&self, _is_remote: bool, name: String) -> BoxFuture<'_, Result<()>> {
+    fn delete_branch(
+        &self,
+        _is_remote: bool,
+        name: String,
+        force: bool,
+    ) -> BoxFuture<'_, Result<()>> {
         self.with_state_async(true, move |state| {
+            if !force && state.branches_requiring_force_delete.contains(&name) {
+                bail!(
+                    "error: The branch '{name}' is not fully merged.\nIf you are sure you want to delete it, run 'git branch -D {name}'."
+                );
+            }
             if !state.branches.remove(&name) {
                 bail!("no such branch: {name}");
             }
+            state.branches_requiring_force_delete.remove(&name);
             Ok(())
         })
     }

crates/fs/src/fs_watcher.rs

@@ -1,4 +1,4 @@
-use notify::EventKind;
+use notify::{Event, EventKind};
 use parking_lot::Mutex;
 use std::{
     collections::{BTreeMap, HashMap},
@@ -458,6 +458,16 @@ fn handle_poll_event(event: Result<notify::Event, notify::Error>) {
 }
 
 fn handle_event(mode: WatcherMode, event: Result<notify::Event, notify::Error>) {
+    if matches!(
+        event,
+        Ok(Event {
+            kind: EventKind::Access(_),
+            ..
+        })
+    ) {
+        return;
+    }
+
     log::trace!("global handle event for {mode:?}: {event:?}");
 
     let callbacks = {
@@ -472,9 +482,6 @@ fn handle_event(mode: WatcherMode, event: Result<notify::Event, notify::Error>)
 
     match event {
         Ok(event) => {
-            if matches!(event.kind, EventKind::Access(_)) {
-                return;
-            }
             for callback in callbacks {
                 callback(Ok(&event));
             }

crates/fuzzy_nucleo/src/fuzzy_nucleo.rs

@@ -2,6 +2,9 @@ mod matcher;
 mod paths;
 mod strings;
 
+use fuzzy::CharBag;
+use nucleo::pattern::{AtomKind, CaseMatching, Normalization, Pattern};
+
 pub use paths::{
     PathMatch, PathMatchCandidate, PathMatchCandidateSet, match_fixed_path_set, match_path_sets,
 };
@@ -45,6 +48,83 @@ impl LengthPenalty {
     }
 }
 
+// Matching is always case-insensitive at the nucleo level — using
+// `CaseMatching::Smart` there would *reject* candidates whose capitalization
+// doesn't match the query, breaking pickers like the command palette
+// (`"Editor: Backspace"` against the action named `"editor: backspace"`).
+// `Case::Smart` is honored as a *scoring hint* instead: when the query
+// contains uppercase, candidates whose matched characters disagree in case
+// are downranked by a per-mismatch penalty rather than dropped.
+pub(crate) struct Query {
+    pub(crate) pattern: Pattern,
+    /// Non-whitespace query chars in input order, populated only when a smart-case
+    /// penalty will actually be charged. Aligns 1:1 with the indices appended by
+    /// `Pattern::indices` (atom-order, needle-order within each atom).
+    pub(crate) query_chars: Option<Vec<char>>,
+    pub(crate) char_bag: CharBag,
+}
+
+impl Query {
+    pub(crate) fn build(query: &str, case: Case) -> Option<Self> {
+        if query.chars().all(char::is_whitespace) {
+            return None;
+        }
+        let normalized = query.split_whitespace().collect::<Vec<_>>().join(" ");
+        let pattern = Pattern::new(
+            &normalized,
+            CaseMatching::Ignore,
+            Normalization::Smart,
+            AtomKind::Fuzzy,
+        );
+        let wants_case_penalty = case.is_smart() && query.chars().any(|c| c.is_uppercase());
+        let query_chars =
+            wants_case_penalty.then(|| query.chars().filter(|c| !c.is_whitespace()).collect());
+        Some(Query {
+            pattern,
+            query_chars,
+            char_bag: CharBag::from(query),
+        })
+    }
+}
+
+#[inline]
+pub(crate) fn count_case_mismatches(
+    query_chars: Option<&[char]>,
+    matched_chars: &[u32],
+    candidate: &str,
+    candidate_chars: &mut Vec<char>,
+) -> u32 {
+    let Some(query_chars) = query_chars else {
+        return 0;
+    };
+    if query_chars.len() != matched_chars.len() {
+        return 0;
+    }
+    candidate_chars.clear();
+    candidate_chars.extend(candidate.chars());
+    let mut mismatches: u32 = 0;
+    for (&query_char, &pos) in query_chars.iter().zip(matched_chars) {
+        if let Some(&candidate_char) = candidate_chars.get(pos as usize)
+            && candidate_char != query_char
+            && candidate_char.eq_ignore_ascii_case(&query_char)
+        {
+            mismatches += 1;
+        }
+    }
+    mismatches
+}
+
+const SMART_CASE_PENALTY_PER_MISMATCH: f64 = 0.9;
+
+#[inline]
+pub(crate) fn case_penalty(mismatches: u32) -> f64 {
+    if mismatches == 0 {
+        1.0
+    } else {
+        SMART_CASE_PENALTY_PER_MISMATCH.powi(mismatches as i32)
+    }
+}
+
 /// Reconstruct byte-offset match positions from a list of matched char offsets
 /// that is already sorted ascending and deduplicated.
 pub(crate) fn positions_from_sorted(s: &str, sorted_char_indices: &[u32]) -> Vec<usize> {

crates/fuzzy_nucleo/src/paths.rs

@@ -9,12 +9,12 @@ use std::{
 use util::{paths::PathStyle, rel_path::RelPath};
 
 use nucleo::Utf32Str;
-use nucleo::pattern::{Atom, AtomKind, CaseMatching, Normalization};
+use nucleo::pattern::Pattern;
 
 use fuzzy::CharBag;
 
 use crate::matcher::{self, LENGTH_PENALTY};
-use crate::{Cancelled, Case, positions_from_sorted};
+use crate::{Cancelled, Case, Query, case_penalty, count_case_mismatches, positions_from_sorted};
 
 #[derive(Clone, Debug)]
 pub struct PathMatchCandidate<'a> {
@@ -96,47 +96,6 @@ impl Ord for PathMatch {
     }
 }
 
-// Path matching is always case-insensitive at the nucleo level. `Case::Smart`
-// is honored as a *scoring hint*: when the query contains uppercase, candidates
-// whose matched characters disagree in case are downranked by a factor per
-// mismatch rather than dropped. This keeps `"Editor: Backspace"` matching
-// `"editor: backspace"` while still preferring exact-case hits.
-const SMART_CASE_PENALTY_PER_MISMATCH: f64 = 0.9;
-
-pub(crate) fn make_atoms(query: &str) -> Vec<Atom> {
-    query
-        .split_whitespace()
-        .map(|word| {
-            Atom::new(
-                word,
-                CaseMatching::Ignore,
-                Normalization::Smart,
-                AtomKind::Fuzzy,
-                false,
-            )
-        })
-        .collect()
-}
-
-// Only populated when we will actually charge a smart-case penalty, so the hot
-// path can iterate a plain `&[Atom]` and ignore this slice entirely.
-fn make_source_words(query: &str, case: Case) -> Option<Vec<Vec<char>>> {
-    (case.is_smart() && query.chars().any(|c| c.is_uppercase())).then(|| {
-        query
-            .split_whitespace()
-            .map(|word| word.chars().collect())
-            .collect()
-    })
-}
-
-fn case_penalty(mismatches: u32) -> f64 {
-    if mismatches == 0 {
-        1.0
-    } else {
-        SMART_CASE_PENALTY_PER_MISMATCH.powi(mismatches as i32)
-    }
-}
-
 pub(crate) fn distance_between_paths(path: &RelPath, relative_to: &RelPath) -> usize {
     let mut path_components = path.components();
     let mut relative_components = relative_to.components();
@@ -150,34 +109,34 @@ pub(crate) fn distance_between_paths(path: &RelPath, relative_to: &RelPath) -> u
     path_components.count() + relative_components.count() + 1
 }
 
+#[inline]
 fn get_filename_match_bonus(
     candidate_buf: &str,
-    query_atoms: &[Atom],
+    pattern: &Pattern,
     matcher: &mut nucleo::Matcher,
 ) -> f64 {
-    let filename = match std::path::Path::new(candidate_buf).file_name() {
-        Some(f) => f.to_str().unwrap_or(""),
-        None => return 0.0,
-    };
-    if filename.is_empty() || query_atoms.is_empty() {
+    let Some(filename) = std::path::Path::new(candidate_buf)
+        .file_name()
+        .and_then(|f| f.to_str())
+        .filter(|f| !f.is_empty())
+    else {
         return 0.0;
-    }
+    };
     let mut buf = Vec::new();
     let haystack = Utf32Str::new(filename, &mut buf);
-    let mut total_score = 0u32;
-    for atom in query_atoms {
-        if let Some(score) = atom.score(haystack, matcher) {
-            total_score = total_score.saturating_add(score as u32);
-        }
-    }
-    total_score as f64 / filename.len().max(1) as f64
+    let score: u32 = pattern
+        .atoms
+        .iter()
+        .filter_map(|atom| atom.score(haystack, matcher))
+        .map(|s| s as u32)
+        .sum();
+
+    score as f64 / filename.len().max(1) as f64
 }
 
 fn path_match_helper<'a>(
     matcher: &mut nucleo::Matcher,
-    atoms: &[Atom],
-    source_words: Option<&[Vec<char>]>,
-    query_bag: CharBag,
+    query: &Query,
     candidates: impl Iterator<Item = PathMatchCandidate<'a>>,
     results: &mut Vec<PathMatch>,
     worktree_id: usize,
@@ -197,7 +156,6 @@ fn path_match_helper<'a>(
     let path_prefix_len = candidate_buf.len();
     let mut buf = Vec::new();
     let mut matched_chars: Vec<u32> = Vec::new();
-    let mut atom_matched_chars = Vec::new();
     let mut candidate_chars: Vec<char> = Vec::new();
     for candidate in candidates {
         buf.clear();
@@ -206,7 +164,7 @@ fn path_match_helper<'a>(
             return Err(Cancelled);
         }
 
-        if !candidate.char_bag.is_superset(query_bag) {
+        if !candidate.char_bag.is_superset(query.char_bag) {
             continue;
         }
 
@@ -219,70 +177,45 @@ fn path_match_helper<'a>(
 
         let haystack = Utf32Str::new(&candidate_buf, &mut buf);
 
-        if source_words.is_some() {
-            candidate_chars.clear();
-            candidate_chars.extend(candidate_buf.chars());
-        }
+        let Some(score) = query.pattern.indices(haystack, matcher, &mut matched_chars) else {
+            continue;
+        };
 
-        let mut total_score: u32 = 0;
-        let mut case_mismatches: u32 = 0;
-        let mut all_matched = true;
+        let case_mismatches = count_case_mismatches(
+            query.query_chars.as_deref(),
+            &matched_chars,
+            &candidate_buf,
+            &mut candidate_chars,
+        );
 
-        for (atom_idx, atom) in atoms.iter().enumerate() {
-            atom_matched_chars.clear();
-            let Some(score) = atom.indices(haystack, matcher, &mut atom_matched_chars) else {
-                all_matched = false;
-                break;
-            };
-            total_score = total_score.saturating_add(score as u32);
-            if let Some(source_words) = source_words {
-                let query_chars = &source_words[atom_idx];
-                if query_chars.len() == atom_matched_chars.len() {
-                    for (&query_char, &pos) in query_chars.iter().zip(&atom_matched_chars) {
-                        if let Some(&candidate_char) = candidate_chars.get(pos as usize)
-                            && candidate_char != query_char
-                            && candidate_char.eq_ignore_ascii_case(&query_char)
-                        {
-                            case_mismatches += 1;
-                        }
-                    }
-                }
-            }
-            matched_chars.extend_from_slice(&atom_matched_chars);
-        }
+        matched_chars.sort_unstable();
+        matched_chars.dedup();
 
-        if all_matched && !atoms.is_empty() {
-            matched_chars.sort_unstable();
-            matched_chars.dedup();
+        let length_penalty = candidate_buf.len() as f64 * LENGTH_PENALTY;
+        let filename_bonus = get_filename_match_bonus(&candidate_buf, &query.pattern, matcher);
+        let positive = (score as f64 + filename_bonus) * case_penalty(case_mismatches);
+        let adjusted_score = positive - length_penalty;
+        let positions = positions_from_sorted(&candidate_buf, &matched_chars);
 
-            let length_penalty = candidate_buf.len() as f64 * LENGTH_PENALTY;
-            let filename_bonus = get_filename_match_bonus(&candidate_buf, atoms, matcher);
-            let positive = (total_score as f64 + filename_bonus) * case_penalty(case_mismatches);
-            let adjusted_score = positive - length_penalty;
-            let positions = positions_from_sorted(&candidate_buf, &matched_chars);
-
-            results.push(PathMatch {
-                score: adjusted_score,
-                positions,
-                worktree_id,
-                path: if root_is_file {
-                    Arc::clone(path_prefix)
-                } else {
-                    candidate.path.into()
-                },
-                path_prefix: if root_is_file {
-                    RelPath::empty().into()
-                } else {
-                    Arc::clone(path_prefix)
-                },
-                is_dir: candidate.is_dir,
-                distance_to_relative_ancestor: relative_to
-                    .as_ref()
-                    .map_or(usize::MAX, |relative_to| {
-                        distance_between_paths(candidate.path, relative_to.as_ref())
-                    }),
-            });
-        }
+        results.push(PathMatch {
+            score: adjusted_score,
+            positions,
+            worktree_id,
+            path: if root_is_file {
+                Arc::clone(path_prefix)
+            } else {
+                candidate.path.into()
+            },
+            path_prefix: if root_is_file {
+                RelPath::empty().into()
+            } else {
+                Arc::clone(path_prefix)
+            },
+            is_dir: candidate.is_dir,
+            distance_to_relative_ancestor: relative_to.as_ref().map_or(usize::MAX, |relative_to| {
+                distance_between_paths(candidate.path, relative_to.as_ref())
+            }),
+        });
     }
     Ok(())
 }
@@ -296,14 +229,14 @@ pub fn match_fixed_path_set(
     max_results: usize,
     path_style: PathStyle,
 ) -> Vec<PathMatch> {
+    let Some(query) = Query::build(query, case) else {
+        return Vec::new();
+    };
+
     let mut config = nucleo::Config::DEFAULT;
     config.set_match_paths();
     let mut matcher = matcher::get_matcher(config);
 
-    let atoms = make_atoms(query);
-    let source_words = make_source_words(query, case);
-    let query_bag = CharBag::from(query);
-
     let root_is_file = worktree_root_name.is_some() && candidates.iter().all(|c| c.path.is_empty());
 
     let path_prefix = worktree_root_name.unwrap_or_else(|| RelPath::empty().into());
@@ -312,9 +245,7 @@ pub fn match_fixed_path_set(
 
     path_match_helper(
         &mut matcher,
-        &atoms,
-        source_words.as_deref(),
-        query_bag,
+        &query,
         candidates.into_iter(),
         &mut results,
         worktree_id,
@@ -352,9 +283,9 @@ pub async fn match_path_sets<'a, Set: PathMatchCandidateSet<'a>>(
         query.to_owned()
     };
 
-    let atoms = make_atoms(&query);
-    let source_words = make_source_words(&query, case);
-    let query_bag = CharBag::from(query.as_str());
+    let Some(query) = Query::build(&query, case) else {
+        return Vec::new();
+    };
 
     let num_cpus = executor.num_cpus().min(path_count);
     let segment_size = path_count.div_ceil(num_cpus);
@@ -371,8 +302,7 @@ pub async fn match_path_sets<'a, Set: PathMatchCandidateSet<'a>>(
                 .zip(matchers.iter_mut())
                 .enumerate()
             {
-                let atoms = atoms.clone();
-                let source_words = source_words.clone();
+                let query = &query;
                 let relative_to = relative_to.clone();
                 scope.spawn(async move {
                     let segment_start = segment_idx * segment_size;
@@ -389,9 +319,7 @@ pub async fn match_path_sets<'a, Set: PathMatchCandidateSet<'a>>(
 
                             if path_match_helper(
                                 matcher,
-                                &atoms,
-                                source_words.as_deref(),
-                                query_bag,
+                                query,
                                 candidates,
                                 results,
                                 candidate_set.id(),

crates/fuzzy_nucleo/src/strings.rs

@@ -8,61 +8,14 @@ use std::{
 
 use gpui::{BackgroundExecutor, SharedString};
 use nucleo::Utf32Str;
-use nucleo::pattern::{Atom, AtomKind, CaseMatching, Normalization};
 
 use crate::{
-    Cancelled, Case, LengthPenalty,
+    Cancelled, Case, LengthPenalty, Query, case_penalty, count_case_mismatches,
     matcher::{self, LENGTH_PENALTY},
     positions_from_sorted,
 };
 use fuzzy::CharBag;
 
-// String matching is always case-insensitive at the nucleo level — using
-// `CaseMatching::Smart` there would reject queries whose capitalization
-// doesn't match the candidate, breaking pickers like the command palette
-// (`"Editor: Backspace"` against the action named `"editor: backspace"`).
-// `Case::Smart` is still honored as a *scoring hint*: when the query
-// contains uppercase, candidates whose matched characters disagree in case
-// are downranked rather than dropped.
-const SMART_CASE_PENALTY_PER_MISMATCH: f64 = 0.9;
-
-struct Query {
-    atoms: Vec<Atom>,
-    source_words: Option<Vec<Vec<char>>>,
-    char_bag: CharBag,
-}
-
-impl Query {
-    fn build(query: &str, case: Case) -> Option<Self> {
-        let mut atoms = Vec::new();
-        let mut source_words = Vec::new();
-        let wants_case_penalty = case.is_smart() && query.chars().any(|c| c.is_uppercase());
-
-        for word in query.split_whitespace() {
-            atoms.push(Atom::new(
-                word,
-                CaseMatching::Ignore,
-                Normalization::Smart,
-                AtomKind::Fuzzy,
-                false,
-            ));
-            if wants_case_penalty {
-                source_words.push(word.chars().collect());
-            }
-        }
-
-        if atoms.is_empty() {
-            return None;
-        }
-
-        Some(Query {
-            atoms,
-            source_words: wants_case_penalty.then_some(source_words),
-            char_bag: CharBag::from(query),
-        })
-    }
-}
-
 #[derive(Clone, Debug)]
 pub struct StringMatchCandidate {
     pub id: usize,
@@ -281,7 +234,6 @@ where
 {
     let mut buf = Vec::new();
     let mut matched_chars: Vec<u32> = Vec::new();
-    let mut atom_matched_chars = Vec::new();
     let mut candidate_chars: Vec<char> = Vec::new();
 
     for candidate in candidates {
@@ -297,69 +249,37 @@ where
             continue;
         }
 
-        let haystack: Utf32Str = Utf32Str::new(&borrowed.string, &mut buf);
+        let haystack: Utf32Str = Utf32Str::new(borrowed.string.as_ref(), &mut buf);
 
-        if query.source_words.is_some() {
-            candidate_chars.clear();
-            candidate_chars.extend(borrowed.string.chars());
-        }
+        let Some(score) = query.pattern.indices(haystack, matcher, &mut matched_chars) else {
+            continue;
+        };
 
-        let mut total_score: u32 = 0;
-        let mut case_mismatches: u32 = 0;
-        let mut all_matched = true;
+        let case_mismatches = count_case_mismatches(
+            query.query_chars.as_deref(),
+            &matched_chars,
+            borrowed.string.as_ref(),
+            &mut candidate_chars,
+        );
 
-        for (atom_idx, atom) in query.atoms.iter().enumerate() {
-            atom_matched_chars.clear();
-            let Some(score) = atom.indices(haystack, matcher, &mut atom_matched_chars) else {
-                all_matched = false;
-                break;
-            };
-            total_score = total_score.saturating_add(score as u32);
-            if let Some(source_words) = query.source_words.as_deref() {
-                let query_chars = &source_words[atom_idx];
-                if query_chars.len() == atom_matched_chars.len() {
-                    for (&query_char, &pos) in query_chars.iter().zip(&atom_matched_chars) {
-                        if let Some(&candidate_char) = candidate_chars.get(pos as usize)
-                            && candidate_char != query_char
-                            && candidate_char.eq_ignore_ascii_case(&query_char)
-                        {
-                            case_mismatches += 1;
-                        }
-                    }
-                }
-            }
-            matched_chars.extend_from_slice(&atom_matched_chars);
-        }
+        matched_chars.sort_unstable();
+        matched_chars.dedup();
 
-        if all_matched {
-            matched_chars.sort_unstable();
-            matched_chars.dedup();
+        let positive = score as f64 * case_penalty(case_mismatches);
+        let adjusted_score =
+            positive - length_penalty_for(borrowed.string.as_ref(), length_penalty);
+        let positions = positions_from_sorted(borrowed.string.as_ref(), &matched_chars);
 
-            let positive = total_score as f64 * case_penalty(case_mismatches);
-            let adjusted_score =
-                positive - length_penalty_for(borrowed.string.as_ref(), length_penalty);
-            let positions = positions_from_sorted(borrowed.string.as_ref(), &matched_chars);
-
-            results.push(StringMatch {
-                candidate_id: borrowed.id,
-                score: adjusted_score,
-                positions,
-                string: borrowed.string.clone(),
-            });
-        }
+        results.push(StringMatch {
+            candidate_id: borrowed.id,
+            score: adjusted_score,
+            positions,
+            string: borrowed.string.clone(),
+        });
     }
     Ok(())
 }
 
-#[inline]
-fn case_penalty(mismatches: u32) -> f64 {
-    if mismatches == 0 {
-        1.0
-    } else {
-        SMART_CASE_PENALTY_PER_MISMATCH.powi(mismatches as i32)
-    }
-}
-
 #[inline]
 fn length_penalty_for(s: &str, length_penalty: LengthPenalty) -> f64 {
     if length_penalty.is_on() {

crates/git/src/repository.rs

@@ -721,6 +721,15 @@ pub struct SearchCommitArgs {
     pub case_sensitive: bool,
 }
 
+pub fn delete_branch_flag(is_remote_tracking_ref: bool, force: bool) -> &'static str {
+    match (is_remote_tracking_ref, force) {
+        (true, true) => "-Dr",
+        (true, false) => "-dr",
+        (false, true) => "-D",
+        (false, false) => "-d",
+    }
+}
+
 pub trait GitRepository: Send + Sync {
     fn reload_index(&self);
 
@@ -775,7 +784,12 @@ pub trait GitRepository: Send + Sync {
     -> BoxFuture<'_, Result<()>>;
     fn rename_branch(&self, branch: String, new_name: String) -> BoxFuture<'_, Result<()>>;
 
-    fn delete_branch(&self, is_remote: bool, name: String) -> BoxFuture<'_, Result<()>>;
+    fn delete_branch(
+        &self,
+        is_remote: bool,
+        name: String,
+        force: bool,
+    ) -> BoxFuture<'_, Result<()>>;
 
     fn worktrees(&self) -> BoxFuture<'_, Result<Vec<Worktree>>>;
 
@@ -2033,14 +2047,18 @@ impl GitRepository for RealGitRepository {
             .boxed()
     }
 
-    fn delete_branch(&self, is_remote: bool, name: String) -> BoxFuture<'_, Result<()>> {
+    fn delete_branch(
+        &self,
+        is_remote: bool,
+        name: String,
+        force: bool,
+    ) -> BoxFuture<'_, Result<()>> {
         let git_binary = self.git_binary_in_worktree();
 
         self.executor
             .spawn(async move {
-                git_binary?
-                    .run(&["branch", if is_remote { "-dr" } else { "-d" }, &name])
-                    .await?;
+                let flag = delete_branch_flag(is_remote, force);
+                git_binary?.run(&["branch", flag, &name]).await?;
                 anyhow::Ok(())
             })
             .boxed()

crates/git_ui/src/branch_picker.rs

@@ -3,12 +3,12 @@ use editor::Editor;
 use fuzzy_nucleo::StringMatchCandidate;
 
 use collections::HashSet;
-use git::repository::Branch;
+use git::repository::{Branch, delete_branch_flag};
 use gpui::http_client::Url;
 use gpui::{
     Action, App, Context, DismissEvent, Entity, EventEmitter, FocusHandle, Focusable,
-    InteractiveElement, IntoElement, Modifiers, ModifiersChangedEvent, ParentElement, Render,
-    SharedString, Styled, Subscription, Task, TaskExt, WeakEntity, Window, actions, rems,
+    InteractiveElement, IntoElement, Modifiers, ModifiersChangedEvent, ParentElement, PromptLevel,
+    Render, SharedString, Styled, Subscription, Task, TaskExt, WeakEntity, Window, actions, rems,
 };
 use picker::{Picker, PickerDelegate, PickerEditorPosition};
 use project::git_store::{Repository, RepositoryEvent};
@@ -29,6 +29,8 @@ actions!(
     [
         /// Deletes the selected git branch or remote.
         DeleteBranch,
+        /// Force deletes the selected git branch or remote.
+        ForceDeleteBranch,
         /// Filter the list of remotes
         FilterRemotes
     ]
@@ -254,8 +256,10 @@ impl BranchList {
         _: &mut Window,
         cx: &mut Context<Self>,
     ) {
-        self.picker
-            .update(cx, |picker, _| picker.delegate.modifiers = ev.modifiers)
+        self.picker.update(cx, |picker, cx| {
+            picker.delegate.modifiers = ev.modifiers;
+            cx.notify();
+        })
     }
 
     pub fn handle_delete(
@@ -267,7 +271,20 @@ impl BranchList {
         self.picker.update(cx, |picker, cx| {
             picker
                 .delegate
-                .delete_at(picker.delegate.selected_index, window, cx)
+                .delete_at(picker.delegate.selected_index, false, window, cx)
+        })
+    }
+
+    pub fn handle_force_delete(
+        &mut self,
+        _: &branch_picker::ForceDeleteBranch,
+        window: &mut Window,
+        cx: &mut Context<Self>,
+    ) {
+        self.picker.update(cx, |picker, cx| {
+            picker
+                .delegate
+                .delete_at(picker.delegate.selected_index, true, window, cx)
         })
     }
 
@@ -301,6 +318,7 @@ impl Render for BranchList {
             .w(self.width)
             .on_modifiers_changed(cx.listener(Self::handle_modifiers_changed))
             .on_action(cx.listener(Self::handle_delete))
+            .on_action(cx.listener(Self::handle_force_delete))
             .on_action(cx.listener(Self::handle_filter))
             .child(self.picker.clone())
             .when(!self.embedded, |this| {
@@ -393,6 +411,7 @@ pub struct BranchListDelegate {
     focus_handle: FocusHandle,
     restore_selected_branch: Option<SharedString>,
     show_footer: bool,
+    hovered_delete_index: Option<usize>,
 }
 
 #[derive(Debug)]
@@ -407,6 +426,77 @@ enum PickerState {
     NewBranch,
 }
 
+fn delete_branch_command(is_remote: bool, branch_name: &str, force: bool) -> String {
+    format!(
+        "branch {} {branch_name}",
+        delete_branch_flag(is_remote, force)
+    )
+}
+
+// Git only reports "not fully merged" via localized stderr, so this
+// best-effort check may miss some locales and fall back to the raw error toast.
+fn is_unmerged_branch_delete_error(error: &anyhow::Error) -> bool {
+    error
+        .to_string()
+        .to_lowercase()
+        .contains("not fully merged")
+}
+
+struct DeleteBranchTooltip {
+    picker: WeakEntity<Picker<BranchListDelegate>>,
+    focus_handle: FocusHandle,
+    delete_index: usize,
+    _subscription: Subscription,
+}
+
+impl DeleteBranchTooltip {
+    fn new(
+        picker: Entity<Picker<BranchListDelegate>>,
+        focus_handle: FocusHandle,
+        delete_index: usize,
+        cx: &mut Context<Self>,
+    ) -> Self {
+        let subscription = cx.observe(&picker, |_, _, cx| cx.notify());
+        Self {
+            picker: picker.downgrade(),
+            focus_handle,
+            delete_index,
+            _subscription: subscription,
+        }
+    }
+}
+
+impl Render for DeleteBranchTooltip {
+    fn render(&mut self, _: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
+        let force_delete = self
+            .picker
+            .read_with(cx, |picker, _| {
+                picker
+                    .delegate
+                    .is_force_delete_hovering_index(self.delete_index)
+            })
+            .unwrap_or(false);
+        if force_delete {
+            Tooltip::for_action_in(
+                "Force Delete Branch",
+                &branch_picker::ForceDeleteBranch,
+                &self.focus_handle,
+                cx,
+            )
+            .into_any_element()
+        } else {
+            Tooltip::with_meta_in(
+                "Delete Branch",
+                Some(&branch_picker::DeleteBranch),
+                "Hold alt to force delete",
+                &self.focus_handle,
+                cx,
+            )
+            .into_any_element()
+        }
+    }
+}
+
 fn process_branches(branches: &Arc<[Branch]>) -> Vec<Branch> {
     let remote_upstreams: HashSet<_> = branches
         .iter()
@@ -460,9 +550,14 @@ impl BranchListDelegate {
             focus_handle: cx.focus_handle(),
             restore_selected_branch: None,
             show_footer: false,
+            hovered_delete_index: None,
         }
     }
 
+    fn is_force_delete_hovering_index(&self, index: usize) -> bool {
+        self.modifiers.alt && self.hovered_delete_index == Some(index)
+    }
+
     fn create_branch(
         &self,
         from_branch: Option<SharedString>,
@@ -509,7 +604,13 @@ impl BranchListDelegate {
         cx.emit(DismissEvent);
     }
 
-    fn delete_at(&self, idx: usize, window: &mut Window, cx: &mut Context<Picker<Self>>) {
+    fn delete_at(
+        &self,
+        idx: usize,
+        force: bool,
+        window: &mut Window,
+        cx: &mut Context<Picker<Self>>,
+    ) {
         let Some(entry) = self.matches.get(idx).cloned() else {
             return;
         };
@@ -520,49 +621,75 @@ impl BranchListDelegate {
         let workspace = self.workspace.clone();
 
         cx.spawn_in(window, async move |picker, cx| {
-            let is_remote;
-            let result = match &entry {
-                Entry::Branch { branch, .. } => {
-                    if branch.is_head {
-                        return Ok(());
+            let Entry::Branch { branch, .. } = &entry else {
+                log::error!("Failed to delete entry: wrong entry to delete");
+                return Ok(());
+            };
+
+            if branch.is_head {
+                return Ok(());
+            }
+
+            let is_remote = branch.is_remote();
+            let branch_name = branch.name().to_string();
+            let initial_result = repo
+                .update(cx, |repo, _| {
+                    repo.delete_branch(is_remote, branch_name.clone(), force)
+                })
+                .await?;
+
+            let (result, attempted_force) = match initial_result {
+                Ok(()) => (Ok(()), force),
+                Err(error) => {
+                    if is_remote {
+                        log::error!("Failed to delete remote branch: {error}");
+                    } else {
+                        log::error!("Failed to delete branch: {error}");
                     }
 
-                    is_remote = branch.is_remote();
-                    repo.update(cx, |repo, _| {
-                        repo.delete_branch(is_remote, branch.name().to_string())
-                    })
-                    .await?
-                }
-                _ => {
-                    log::error!("Failed to delete entry: wrong entry to delete");
-                    return Ok(());
+                    if force || !is_unmerged_branch_delete_error(&error) {
+                        (Err(error), force)
+                    } else {
+                        let answer = cx.update(|window, cx| {
+                            window.prompt(
+                                PromptLevel::Warning,
+                                &format!(
+                                    "Branch \"{}\" is not fully merged. Force delete it?",
+                                    entry.name()
+                                ),
+                                None,
+                                &["Force Delete", "Cancel"],
+                                cx,
+                            )
+                        })?;
+
+                        if answer.await != Ok(0) {
+                            return Ok(());
+                        }
+
+                        let retry = repo
+                            .update(cx, |repo, _| {
+                                repo.delete_branch(is_remote, branch_name, true)
+                            })
+                            .await?;
+
+                        if let Err(error) = &retry {
+                            log::error!("Failed to force delete branch: {error}");
+                        }
+                        (retry, true)
+                    }
                 }
             };
 
-            if let Err(e) = result {
-                if is_remote {
-                    log::error!("Failed to delete remote branch: {}", e);
-                } else {
-                    log::error!("Failed to delete branch: {}", e);
-                }
-
+            if let Err(error) = result {
                 if let Some(workspace) = workspace.upgrade() {
                     cx.update(|_window, cx| {
-                        if is_remote {
-                            show_error_toast(
-                                workspace,
-                                format!("branch -dr {}", entry.name()),
-                                e,
-                                cx,
-                            )
-                        } else {
-                            show_error_toast(
-                                workspace,
-                                format!("branch -d {}", entry.name()),
-                                e,
-                                cx,
-                            )
-                        }
+                        show_error_toast(
+                            workspace,
+                            delete_branch_command(is_remote, entry.name(), attempted_force),
+                            error,
+                            cx,
+                        )
                     })?;
                 }
 
@@ -585,6 +712,8 @@ impl BranchListDelegate {
                     picker.delegate.selected_index = picker.delegate.matches.len() - 1;
                 }
 
+                picker.delegate.hovered_delete_index = None;
+
                 cx.notify();
             })?;
 
@@ -980,6 +1109,7 @@ impl PickerDelegate for BranchListDelegate {
         };
 
         let focus_handle = self.focus_handle.clone();
+        let picker = cx.entity();
         let is_new_items = matches!(
             entry,
             Entry::NewUrl { .. } | Entry::NewBranch { .. } | Entry::NewRemoteName { .. }
@@ -988,19 +1118,44 @@ impl PickerDelegate for BranchListDelegate {
         let is_head_branch = entry.as_branch().is_some_and(|branch| branch.is_head);
 
         let deleted_branch_icon = |entry_ix: usize| {
-            IconButton::new(("delete", entry_ix), IconName::Trash)
-                .icon_size(IconSize::Small)
-                .tooltip(move |_, cx| {
-                    Tooltip::for_action_in(
-                        "Delete Branch",
-                        &branch_picker::DeleteBranch,
-                        &focus_handle,
-                        cx,
-                    )
-                })
-                .on_click(cx.listener(move |this, _, window, cx| {
-                    this.delegate.delete_at(entry_ix, window, cx);
+            let picker = picker.clone();
+            let focus_handle = focus_handle.clone();
+            let force_delete = self.is_force_delete_hovering_index(entry_ix);
+
+            div()
+                .id(("delete-hover", entry_ix))
+                .on_hover(cx.listener(move |this, hovered: &bool, _, cx| {
+                    if *hovered {
+                        this.delegate.hovered_delete_index = Some(entry_ix);
+                    } else if this.delegate.hovered_delete_index == Some(entry_ix) {
+                        this.delegate.hovered_delete_index = None;
+                    }
+                    cx.notify();
                 }))
+                .child(
+                    IconButton::new(("delete", entry_ix), IconName::Trash)
+                        .icon_size(IconSize::Small)
+                        .when(force_delete, |this| this.icon_color(Color::Error))
+                        .tooltip(move |_, cx| {
+                            cx.new(|cx| {
+                                DeleteBranchTooltip::new(
+                                    picker.clone(),
+                                    focus_handle.clone(),
+                                    entry_ix,
+                                    cx,
+                                )
+                            })
+                            .into()
+                        })
+                        .on_click(cx.listener(move |this, _, window, cx| {
+                            this.delegate.delete_at(
+                                entry_ix,
+                                this.delegate.modifiers.alt,
+                                window,
+                                cx,
+                            );
+                        })),
+                )
         };
 
         let create_from_default_button = self.default_branch.as_ref().map(|default_branch| {
@@ -1480,9 +1635,9 @@ mod tests {
         (branch_list, cx)
     }
 
-    async fn init_fake_repository(
+    async fn init_fake_repository_with_fs(
         cx: &mut TestAppContext,
-    ) -> (Entity<Project>, Entity<Repository>) {
+    ) -> (Arc<FakeFs>, Entity<Project>, Entity<Repository>) {
         let fs = FakeFs::new(cx.executor());
         fs.insert_tree(
             path!("/dir"),
@@ -1505,7 +1660,14 @@ mod tests {
         let project = Project::test(fs.clone(), [path!("/dir").as_ref()], cx).await;
         let repository = cx.read(|cx| project.read(cx).active_repository(cx));
 
-        (project, repository.unwrap())
+        (fs, project, repository.unwrap())
+    }
+
+    async fn init_fake_repository(
+        cx: &mut TestAppContext,
+    ) -> (Entity<Project>, Entity<Repository>) {
+        let (_, project, repository) = init_fake_repository_with_fs(cx).await;
+        (project, repository)
     }
 
     #[gpui::test]
@@ -1597,7 +1759,7 @@ mod tests {
             branch_list.picker.update(cx, |picker, cx| {
                 assert_eq!(picker.delegate.matches.len(), 4);
                 let branch_to_delete = picker.delegate.matches.get(1).unwrap().name().to_string();
-                picker.delegate.delete_at(1, window, cx);
+                picker.delegate.delete_at(1, false, window, cx);
                 branch_to_delete
             })
         });
@@ -1641,6 +1803,238 @@ mod tests {
         });
     }
 
+    #[gpui::test]
+    async fn test_delete_unmerged_branch_prompts_for_force_delete(cx: &mut TestAppContext) {
+        init_test(cx);
+        let (fs, _project, repository) = init_fake_repository_with_fs(cx).await;
+
+        let branches = create_test_branches();
+        let branch_names = branches
+            .iter()
+            .map(|branch| branch.name().to_string())
+            .collect::<Vec<String>>();
+        let repo = repository.clone();
+        cx.spawn(async move |mut cx| {
+            for branch in branch_names {
+                repo.update(&mut cx, |repo, _| repo.create_branch(branch, None))
+                    .await
+                    .unwrap()
+                    .unwrap();
+            }
+        })
+        .await;
+        cx.run_until_parked();
+
+        let branch_to_delete = "feature-auth";
+        fs.with_git_state(path!("/dir/.git").as_ref(), true, |state| {
+            state
+                .branches_requiring_force_delete
+                .insert(branch_to_delete.to_string());
+        })
+        .expect("failed to mark test branch as requiring force delete");
+
+        let (branch_list, mut ctx) = init_branch_list_test(repository.into(), branches, cx).await;
+        let cx = &mut ctx;
+        update_branch_list_matches_with_empty_query(&branch_list, cx).await;
+
+        branch_list.update_in(cx, |branch_list, window, cx| {
+            branch_list.picker.update(cx, |picker, cx| {
+                let branch_index = picker
+                    .delegate
+                    .matches
+                    .iter()
+                    .position(|entry| entry.name() == branch_to_delete)
+                    .unwrap();
+                picker.delegate.delete_at(branch_index, false, window, cx);
+            })
+        });
+        cx.run_until_parked();
+        assert!(cx.has_pending_prompt());
+
+        cx.simulate_prompt_answer("Force Delete");
+        cx.run_until_parked();
+
+        let repo_branches = branch_list
+            .update(cx, |branch_list, cx| {
+                branch_list.picker.update(cx, |picker, cx| {
+                    picker
+                        .delegate
+                        .repo
+                        .as_ref()
+                        .unwrap()
+                        .update(cx, |repo, _cx| repo.branches())
+                })
+            })
+            .await
+            .unwrap()
+            .unwrap();
+        assert!(
+            repo_branches
+                .iter()
+                .all(|branch| branch.name() != branch_to_delete)
+        );
+    }
+
+    #[gpui::test]
+    async fn test_delete_unmerged_branch_cancel_keeps_branch(cx: &mut TestAppContext) {
+        init_test(cx);
+        let (fs, _project, repository) = init_fake_repository_with_fs(cx).await;
+
+        let branches = create_test_branches();
+        let branch_names = branches
+            .iter()
+            .map(|branch| branch.name().to_string())
+            .collect::<Vec<String>>();
+        let repo = repository.clone();
+        cx.spawn(async move |mut cx| {
+            for branch in branch_names {
+                repo.update(&mut cx, |repo, _| repo.create_branch(branch, None))
+                    .await
+                    .unwrap()
+                    .unwrap();
+            }
+        })
+        .await;
+        cx.run_until_parked();
+
+        let branch_to_delete = "feature-auth";
+        fs.with_git_state(path!("/dir/.git").as_ref(), true, |state| {
+            state
+                .branches_requiring_force_delete
+                .insert(branch_to_delete.to_string());
+        })
+        .expect("failed to mark test branch as requiring force delete");
+
+        let (branch_list, mut ctx) = init_branch_list_test(repository.into(), branches, cx).await;
+        let cx = &mut ctx;
+        update_branch_list_matches_with_empty_query(&branch_list, cx).await;
+
+        let initial_match_count = branch_list.update(cx, |branch_list, cx| {
+            branch_list
+                .picker
+                .update(cx, |picker, _| picker.delegate.matches.len())
+        });
+
+        branch_list.update_in(cx, |branch_list, window, cx| {
+            branch_list.picker.update(cx, |picker, cx| {
+                let branch_index = picker
+                    .delegate
+                    .matches
+                    .iter()
+                    .position(|entry| entry.name() == branch_to_delete)
+                    .unwrap();
+                picker.delegate.delete_at(branch_index, false, window, cx);
+            })
+        });
+        cx.run_until_parked();
+        assert!(cx.has_pending_prompt());
+
+        cx.simulate_prompt_answer("Cancel");
+        cx.run_until_parked();
+        assert!(!cx.has_pending_prompt());
+
+        let repo_branches = branch_list
+            .update(cx, |branch_list, cx| {
+                branch_list.picker.update(cx, |picker, cx| {
+                    picker
+                        .delegate
+                        .repo
+                        .as_ref()
+                        .unwrap()
+                        .update(cx, |repo, _cx| repo.branches())
+                })
+            })
+            .await
+            .unwrap()
+            .unwrap();
+        assert!(
+            repo_branches
+                .iter()
+                .any(|branch| branch.name() == branch_to_delete),
+            "branch should still exist after cancelling the force-delete prompt"
+        );
+
+        let final_match_count = branch_list.update(cx, |branch_list, cx| {
+            branch_list
+                .picker
+                .update(cx, |picker, _| picker.delegate.matches.len())
+        });
+        assert_eq!(
+            initial_match_count, final_match_count,
+            "picker matches should be unchanged after cancel"
+        );
+    }
+
+    #[gpui::test]
+    async fn test_force_delete_click_deletes_branch_without_prompt(cx: &mut TestAppContext) {
+        init_test(cx);
+        let (fs, _project, repository) = init_fake_repository_with_fs(cx).await;
+
+        let branches = create_test_branches();
+        let branch_names = branches
+            .iter()
+            .map(|branch| branch.name().to_string())
+            .collect::<Vec<String>>();
+        let repo = repository.clone();
+        cx.spawn(async move |mut cx| {
+            for branch in branch_names {
+                repo.update(&mut cx, |repo, _| repo.create_branch(branch, None))
+                    .await
+                    .unwrap()
+                    .unwrap();
+            }
+        })
+        .await;
+        cx.run_until_parked();
+
+        let branch_to_delete = "feature-auth";
+        fs.with_git_state(path!("/dir/.git").as_ref(), true, |state| {
+            state
+                .branches_requiring_force_delete
+                .insert(branch_to_delete.to_string());
+        })
+        .expect("failed to mark test branch as requiring force delete");
+
+        let (branch_list, mut ctx) = init_branch_list_test(repository.into(), branches, cx).await;
+        let cx = &mut ctx;
+        update_branch_list_matches_with_empty_query(&branch_list, cx).await;
+
+        branch_list.update_in(cx, |branch_list, window, cx| {
+            branch_list.picker.update(cx, |picker, cx| {
+                picker.delegate.modifiers = Modifiers::alt();
+                let branch_index = picker
+                    .delegate
+                    .matches
+                    .iter()
+                    .position(|entry| entry.name() == branch_to_delete)
+                    .unwrap();
+                picker.delegate.delete_at(branch_index, true, window, cx);
+            })
+        });
+        cx.run_until_parked();
+        assert!(!cx.has_pending_prompt());
+
+        let repo_branches = branch_list
+            .update(cx, |branch_list, cx| {
+                branch_list.picker.update(cx, |picker, cx| {
+                    picker
+                        .delegate
+                        .repo
+                        .as_ref()
+                        .unwrap()
+                        .update(cx, |repo, _cx| repo.branches())
+                })
+            })
+            .await
+            .unwrap()
+            .unwrap();
+        assert!(
+            repo_branches
+                .iter()
+                .all(|branch| branch.name() != branch_to_delete)
+        );
+    }
+
     #[gpui::test]
     async fn test_delete_remote_branch(cx: &mut TestAppContext) {
         init_test(cx);
@@ -1683,7 +2077,7 @@ mod tests {
             branch_list.picker.update(cx, |picker, cx| {
                 assert_eq!(picker.delegate.matches.len(), 4);
                 let branch_to_delete = picker.delegate.matches.get(1).unwrap().name().to_string();
-                picker.delegate.delete_at(1, window, cx);
+                picker.delegate.delete_at(1, false, window, cx);
                 branch_to_delete
             })
         });

crates/git_ui/src/git_panel.rs

@@ -2244,7 +2244,7 @@ impl GitPanel {
         let editor = cx.new(|cx| Editor::for_buffer(buffer, None, window, cx));
         let wrapped_message = editor.update(cx, |editor, cx| {
             editor.select_all(&Default::default(), window, cx);
-            editor.rewrap_impl(
+            editor.rewrap(
                 RewrapOptions {
                     override_language_settings: false,
                     preserve_existing_whitespace: true,

crates/git_ui/src/git_picker.rs

@@ -12,7 +12,7 @@ use ui::{
 };
 use workspace::{ModalView, Workspace, pane};
 
-use crate::branch_picker::{self, BranchList, DeleteBranch, FilterRemotes};
+use crate::branch_picker::{self, BranchList, DeleteBranch, FilterRemotes, ForceDeleteBranch};
 use crate::stash_picker::{self, DropStashItem, ShowStashItem, StashList};
 
 actions!(git_picker, [ActivateBranchesTab, ActivateStashTab,]);
@@ -295,6 +295,19 @@ impl GitPicker {
         }
     }
 
+    fn handle_force_delete_branch(
+        &mut self,
+        _: &ForceDeleteBranch,
+        window: &mut Window,
+        cx: &mut Context<Self>,
+    ) {
+        if let Some(branch_list) = &self.branch_list {
+            branch_list.update(cx, |list, cx| {
+                list.handle_force_delete(&ForceDeleteBranch, window, cx);
+            });
+        }
+    }
+
     fn handle_filter_remotes(
         &mut self,
         _: &FilterRemotes,
@@ -407,6 +420,7 @@ impl Render for GitPicker {
             .on_modifiers_changed(cx.listener(Self::handle_modifiers_changed))
             .when(self.tab == GitPickerTab::Branches, |el| {
                 el.on_action(cx.listener(Self::handle_delete_branch))
+                    .on_action(cx.listener(Self::handle_force_delete_branch))
                     .on_action(cx.listener(Self::handle_filter_remotes))
             })
             .when(self.tab == GitPickerTab::Stash, |el| {

crates/gpui/src/elements/list.rs

@@ -71,12 +71,27 @@ struct StateInner {
     scroll_handler: Option<Box<dyn FnMut(&ListScrollEvent, &mut Window, &mut App)>>,
     scrollbar_drag_start_height: Option<Pixels>,
     measuring_behavior: ListMeasuringBehavior,
-    pending_scroll: Option<PendingScrollFraction>,
+    pending_scroll: Option<PendingScroll>,
     follow_state: FollowState,
 }
 
+/// Deferred scroll adjustment applied after the scroll-top item has been remeasured.
+///
+/// An absolute pending scroll preserves the same pixel offset into the item, which keeps
+/// visible text stable while content is appended to or removed from that item. A
+/// proportional pending scroll preserves the same fractional position within the item,
+/// which is useful when the whole list is being resized and each item scales similarly.
+#[derive(Clone)]
+enum PendingScroll {
+    /// Preserve the same pixel offset into the item after it is remeasured.
+    Absolute { item_ix: usize, offset: Pixels },
+    /// Preserve the same fractional offset into the item after it is remeasured.
+    Proportional(PendingScrollFraction),
+}
+
 /// Keeps track of a fractional scroll position within an item for restoration
 /// after remeasurement.
+#[derive(Clone)]
 struct PendingScrollFraction {
     /// The index of the item to scroll within.
     item_ix: usize,
@@ -84,6 +99,15 @@ struct PendingScrollFraction {
     fraction: f32,
 }
 
+/// Determines how remeasurement preserves the scroll position when the scroll-top item
+/// changes height.
+enum ScrollAnchor {
+    /// Preserve the same pixel offset into the scroll-top item.
+    Absolute,
+    /// Preserve the same fractional position within the scroll-top item.
+    Proportional,
+}
+
 /// Controls whether the list automatically follows new content at the end.
 #[derive(Clone, Copy, Debug, Default, Eq, PartialEq)]
 pub enum FollowMode {
@@ -271,6 +295,7 @@ struct ListItemSummary {
     unrendered_count: usize,
     height: Pixels,
     has_focus_handles: bool,
+    has_unknown_height: bool,
 }
 
 #[derive(Clone, Debug, Default, PartialEq, Eq, PartialOrd, Ord)]
@@ -335,7 +360,7 @@ impl ListState {
     /// but the number and identity of items remains the same.
     pub fn remeasure(&self) {
         let count = self.item_count();
-        self.remeasure_items(0..count);
+        self.remeasure_items_with_scroll_anchor(0..count, ScrollAnchor::Proportional);
     }
 
     /// Mark items in `range` as needing remeasurement while preserving
@@ -346,31 +371,47 @@ impl ListState {
     /// height may be different (e.g., streaming text, tool results
     /// loading), but the item itself still exists at the same index.
     pub fn remeasure_items(&self, range: Range<usize>) {
+        self.remeasure_items_with_scroll_anchor(range, ScrollAnchor::Absolute);
+    }
+
+    fn remeasure_items_with_scroll_anchor(&self, range: Range<usize>, scroll_anchor: ScrollAnchor) {
         let state = &mut *self.0.borrow_mut();
 
-        // If the scroll-top item falls within the remeasured range,
-        // store a fractional offset so the layout can restore the
-        // proportional scroll position after the item is re-rendered
-        // at its new height.
         if let Some(scroll_top) = state.logical_scroll_top {
             if range.contains(&scroll_top.item_ix) {
-                let mut cursor = state.items.cursor::<Count>(());
-                cursor.seek(&Count(scroll_top.item_ix), Bias::Right);
+                state.pending_scroll = match scroll_anchor {
+                    ScrollAnchor::Absolute => Some(PendingScroll::Absolute {
+                        item_ix: scroll_top.item_ix,
+                        offset: scroll_top.offset_in_item,
+                    }),
+                    ScrollAnchor::Proportional => {
+                        // If the scroll-top item falls within the remeasured range,
+                        // store a fractional offset so the layout can restore the
+                        // proportional scroll position after the item is re-rendered
+                        // at its new height.
+                        let mut cursor = state.items.cursor::<Count>(());
+                        cursor.seek(&Count(scroll_top.item_ix), Bias::Right);
 
-                if let Some(item) = cursor.item() {
-                    if let Some(size) = item.size() {
-                        let fraction = if size.height.0 > 0.0 {
-                            (scroll_top.offset_in_item.0 / size.height.0).clamp(0.0, 1.0)
-                        } else {
-                            0.0
-                        };
+                        cursor
+                            .item()
+                            .and_then(|item| {
+                                item.size().map(|size| {
+                                    let fraction = if size.height.0 > 0.0 {
+                                        (scroll_top.offset_in_item.0 / size.height.0)
+                                            .clamp(0.0, 1.0)
+                                    } else {
+                                        0.0
+                                    };
 
-                        state.pending_scroll = Some(PendingScrollFraction {
-                            item_ix: scroll_top.item_ix,
-                            fraction,
-                        });
+                                    PendingScroll::Proportional(PendingScrollFraction {
+                                        item_ix: scroll_top.item_ix,
+                                        fraction,
+                                    })
+                                })
+                            })
+                            .or_else(|| state.pending_scroll.clone())
                     }
-                }
+                };
             }
         }
 
@@ -399,6 +440,25 @@ impl ListState {
         self.0.borrow().items.summary().count
     }
 
+    /// Whether the list is scrolled to the end, or `None` if the list is
+    /// not scrollable or the total content height is not yet known.
+    pub fn is_scrolled_to_end(&self) -> Option<bool> {
+        let state = self.0.borrow();
+        let bounds = state.last_layout_bounds?;
+        let summary = state.items.summary();
+        if summary.has_unknown_height {
+            return None;
+        }
+        let padding = state.last_padding.unwrap_or_default();
+        let content_height = summary.height + padding.top + padding.bottom;
+        let scroll_max = (content_height - bounds.size.height).max(px(0.));
+        if scroll_max <= px(0.) {
+            return None;
+        }
+        let scroll_top = state.scroll_top(&state.logical_scroll_top());
+        Some(scroll_top >= scroll_max)
+    }
+
     /// Inform the list state that the items in `old_range` have been replaced
     /// by `count` new items that must be recalculated.
     pub fn splice(&self, old_range: Range<usize>, count: usize) {
@@ -874,14 +934,26 @@ impl StateInner {
                 size = Some(element_size);
 
                 // If there's a pending scroll adjustment for the scroll-top
-                // item, apply it, ensuring proportional scroll position is
-                // maintained after re-measuring.
+                // item, apply it.
                 if ix == 0 {
                     if let Some(pending_scroll) = self.pending_scroll.take() {
-                        if pending_scroll.item_ix == scroll_top.item_ix {
-                            scroll_top.offset_in_item =
-                                Pixels(pending_scroll.fraction * element_size.height.0);
-                            self.logical_scroll_top = Some(scroll_top);
+                        match pending_scroll {
+                            PendingScroll::Absolute { item_ix, offset }
+                                if item_ix == scroll_top.item_ix =>
+                            {
+                                scroll_top.offset_in_item = offset.min(element_size.height);
+                                self.logical_scroll_top = Some(scroll_top);
+                            }
+                            PendingScroll::Proportional(pending_scroll)
+                                if pending_scroll.item_ix == scroll_top.item_ix =>
+                            {
+                                // Ensuring proportional scroll position is
+                                // maintained after re-measuring.
+                                scroll_top.offset_in_item =
+                                    Pixels(pending_scroll.fraction * element_size.height.0);
+                                self.logical_scroll_top = Some(scroll_top);
+                            }
+                            _ => {}
                         }
                     }
                 }
@@ -1385,6 +1457,7 @@ impl sum_tree::Item for ListItem {
                     px(0.)
                 },
                 has_focus_handles: focus_handle.is_some(),
+                has_unknown_height: size_hint.is_none(),
             },
             ListItem::Measured {
                 size, focus_handle, ..
@@ -1394,6 +1467,7 @@ impl sum_tree::Item for ListItem {
                 unrendered_count: 0,
                 height: size.height,
                 has_focus_handles: focus_handle.is_some(),
+                has_unknown_height: false,
             },
         }
     }
@@ -1410,6 +1484,7 @@ impl sum_tree::ContextLessSummary for ListItemSummary {
         self.unrendered_count += summary.unrendered_count;
         self.height += summary.height;
         self.has_focus_handles |= summary.has_focus_handles;
+        self.has_unknown_height |= summary.has_unknown_height;
     }
 }
 
@@ -1646,6 +1721,60 @@ mod test {
         assert_eq!(offset.offset_in_item, px(20.));
     }
 
+    #[gpui::test]
+    fn test_remeasure_item_preserves_scroll_offset(cx: &mut TestAppContext) {
+        let cx = cx.add_empty_window();
+
+        let item_height = Rc::new(Cell::new(100usize));
+        let state = ListState::new(20, crate::ListAlignment::Top, px(10.));
+
+        struct TestView {
+            state: ListState,
+            item_height: Rc<Cell<usize>>,
+        }
+
+        impl Render for TestView {
+            fn render(&mut self, _: &mut Window, _: &mut Context<Self>) -> impl IntoElement {
+                let height = self.item_height.get();
+                list(self.state.clone(), move |index, _, _| {
+                    let height = if index == 5 { height } else { 100 };
+                    div().h(px(height as f32)).w_full().into_any()
+                })
+                .w_full()
+                .h_full()
+            }
+        }
+
+        let state_clone = state.clone();
+        let item_height_clone = item_height.clone();
+        let view = cx.update(|_, cx| {
+            cx.new(|_| TestView {
+                state: state_clone,
+                item_height: item_height_clone,
+            })
+        });
+
+        state.scroll_to(gpui::ListOffset {
+            item_ix: 5,
+            offset_in_item: px(40.),
+        });
+
+        cx.draw(point(px(0.), px(0.)), size(px(100.), px(200.)), |_, _| {
+            view.clone().into_any_element()
+        });
+
+        item_height.set(200);
+        state.remeasure_items(5..6);
+
+        cx.draw(point(px(0.), px(0.)), size(px(100.), px(200.)), |_, _| {
+            view.into_any_element()
+        });
+
+        let offset = state.logical_scroll_top();
+        assert_eq!(offset.item_ix, 5);
+        assert_eq!(offset.offset_in_item, px(40.));
+    }
+
     #[gpui::test]
     fn test_follow_tail_stays_at_bottom_as_items_grow(cx: &mut TestAppContext) {
         let cx = cx.add_empty_window();

crates/gpui/src/elements/uniform_list.rs

@@ -8,7 +8,7 @@ use crate::{
     AnyElement, App, AvailableSpace, Bounds, ContentMask, Element, ElementId, Entity,
     GlobalElementId, Hitbox, InspectorElementId, InteractiveElement, Interactivity, IntoElement,
     IsZero, LayoutId, ListSizingBehavior, Overflow, Pixels, Point, ScrollHandle, Size,
-    StyleRefinement, Styled, Window, point, size,
+    StyleRefinement, Styled, Window, point, px, size,
 };
 use smallvec::SmallVec;
 use std::{cell::RefCell, cmp, ops::Range, rc::Rc, usize};
@@ -236,6 +236,18 @@ impl UniformListScrollHandle {
         }
     }
 
+    /// Whether the list is scrolled to the end, or `None` if the list is
+    /// not scrollable.
+    pub fn is_scrolled_to_end(&self) -> Option<bool> {
+        let state = self.0.borrow();
+        let max_offset = state.base_handle.max_offset();
+        if max_offset.y <= px(0.) {
+            return None;
+        }
+        let offset = state.base_handle.offset();
+        Some(-offset.y >= max_offset.y)
+    }
+
     /// Scroll to the bottom of the list.
     pub fn scroll_to_bottom(&self) {
         self.scroll_to_item(usize::MAX, ScrollStrategy::Bottom);

crates/language/src/language.rs

@@ -129,6 +129,12 @@ where
             .unwrap();
         parser
     });
+    // Tree-sitter auto-resets the parser at the end of a successful parse,
+    // but the cancellation paths (progress callback returning `Break`,
+    // cancelled balancing) leave outstanding state on the parser. The next
+    // call to `parse_with_options` would then *resume* that cancelled parse
+    // instead of starting fresh.
+    parser.reset();
     parser.set_included_ranges(&[]).unwrap();
     let result = func(&mut parser);
     PARSERS.lock().push(parser);
@@ -1677,6 +1683,82 @@ mod tests {
         );
     }
 
+    #[test]
+    fn test_with_parser_resets_after_cancellation() {
+        use std::ops::ControlFlow;
+        use tree_sitter::{Language as TsLanguage, ParseOptions};
+
+        let rust_language: TsLanguage = tree_sitter_rust::LANGUAGE.into();
+
+        // Drain the shared pool so this test sees a deterministic LIFO order:
+        // the parser we push at the end of the first `with_parser` call is the
+        // one we pop at the start of the second call.
+        PARSERS.lock().clear();
+
+        // Large enough that tree-sitter invokes the progress callback before
+        // the parse completes; otherwise the cancellation never fires.
+        let large_input = format!("fn a() {{ {} }}", "b(c, d); e(f, g); ".repeat(5000));
+        let small_input = "fn z() {}";
+
+        // Cancel a parse via the progress callback. Tree-sitter retains the
+        // in-progress parse state on the parser (its `canceled_balancing` flag
+        // and/or non-empty parse stack), and the next call to
+        // `parse_with_options` will *resume* that parse unless the parser is
+        // reset first.
+        let cancelled = with_parser(|parser| {
+            parser.set_language(&rust_language).unwrap();
+            let bytes = large_input.as_bytes();
+            let mut break_immediately = |_: &_| ControlFlow::Break(());
+            parser.parse_with_options(
+                &mut |offset, _| {
+                    if offset < bytes.len() {
+                        &bytes[offset..]
+                    } else {
+                        &[]
+                    }
+                },
+                None,
+                Some(ParseOptions {
+                    progress_callback: Some(&mut break_immediately),
+                }),
+            )
+        });
+        assert!(
+            cancelled.is_none(),
+            "first parse should be cancelled by the progress callback"
+        );
+
+        // Deliberately do NOT call `set_language` here: tree-sitter's
+        // `ts_parser_set_language` internally calls `ts_parser_reset`, which
+        // would mask the very bug we're checking for. Instead we rely on the
+        // language being preserved across `parser.reset()` (it is) and verify
+        // that `with_parser` itself produces a clean parser for the next user.
+        let tree = with_parser(|parser| {
+            let bytes = small_input.as_bytes();
+            parser
+                .parse_with_options(
+                    &mut |offset, _| {
+                        if offset < bytes.len() {
+                            &bytes[offset..]
+                        } else {
+                            &[]
+                        }
+                    },
+                    None,
+                    None,
+                )
+                .expect("parse of small_input should succeed")
+        });
+
+        assert_eq!(tree.root_node().byte_range(), 0..small_input.len());
+        assert_eq!(tree.root_node().kind(), "source_file");
+        assert!(
+            !tree.root_node().has_error(),
+            "tree should be error-free, got: {}",
+            tree.root_node().to_sexp()
+        );
+    }
+
     #[gpui::test(iterations = 10)]
 
     async fn test_language_loading(cx: &mut TestAppContext) {

crates/language_models/src/provider/mistral.rs

@@ -1021,7 +1021,7 @@ mod tests {
             speed: None,
         };
 
-        let (mistral_request, _) = into_mistral(request, mistral::Model::Pixtral12BLatest, None);
+        let (mistral_request, _) = into_mistral(request, mistral::Model::MistralSmallLatest, None);
 
         assert_eq!(mistral_request.messages.len(), 1);
         assert!(matches!(

crates/language_models/src/provider/ollama.rs

@@ -381,11 +381,14 @@ impl OllamaLanguageModel {
                     }
                 }
                 Role::Assistant => {
-                    let content = msg.string_contents();
+                    let mut text_content = String::new();
                     let mut thinking = None;
                     let mut tool_calls = Vec::new();
                     for content in msg.content.into_iter() {
                         match content {
+                            MessageContent::Text(text) => {
+                                text_content.push_str(&text);
+                            }
                             MessageContent::Thinking { text, .. } if !text.is_empty() => {
                                 thinking = Some(text)
                             }
@@ -402,7 +405,7 @@ impl OllamaLanguageModel {
                         }
                     }
                     messages.push(ChatMessage::Assistant {
-                        content,
+                        content: text_content,
                         tool_calls: Some(tool_calls),
                         images: if images.is_empty() {
                             None

crates/languages/src/bash.rs

@@ -1,5 +1,14 @@
+use anyhow::Result;
+use async_trait::async_trait;
+use collections::HashMap;
+use language::{LanguageServerName, LspAdapter, LspAdapterDelegate, LspInstaller, Toolchain};
+use lsp::LanguageServerBinary;
+use node_runtime::{NodeRuntime, VersionStrategy};
 use project::ContextProviderWithTasks;
+use semver::Version;
+use std::{path::PathBuf, vec};
 use task::{TaskTemplate, TaskTemplates, VariableName};
+use util::{ResultExt, maybe};
 
 pub(super) fn bash_task_context() -> ContextProviderWithTasks {
     ContextProviderWithTasks::new(TaskTemplates(vec![
@@ -17,6 +26,146 @@ pub(super) fn bash_task_context() -> ContextProviderWithTasks {
     ]))
 }
 
+pub struct BashLspAdapter {
+    node: NodeRuntime,
+}
+
+impl BashLspAdapter {
+    const PACKAGE_NAME: &str = "bash-language-server";
+    const NODE_MODULE_RELATIVE_SERVER_PATH: &str = "bash-language-server/out/cli.js";
+
+    pub fn new(node: NodeRuntime) -> Self {
+        Self { node }
+    }
+
+    async fn get_cached_server_binary(
+        container_dir: PathBuf,
+        env: HashMap<String, String>,
+        node: &NodeRuntime,
+    ) -> Option<lsp::LanguageServerBinary> {
+        maybe!(async {
+            let server_path = container_dir
+                .join("node_modules")
+                .join(Self::NODE_MODULE_RELATIVE_SERVER_PATH);
+            anyhow::ensure!(
+                server_path.exists(),
+                "missing executable in directory {server_path:?}"
+            );
+            Ok(LanguageServerBinary {
+                path: node.binary_path().await?,
+                env: Some(env),
+                arguments: vec![server_path.into(), "start".into()],
+            })
+        })
+        .await
+        .log_err()
+    }
+}
+
+impl LspInstaller for BashLspAdapter {
+    type BinaryVersion = Version;
+
+    async fn cached_server_binary(
+        &self,
+        container_dir: std::path::PathBuf,
+        delegate: &dyn LspAdapterDelegate,
+    ) -> Option<lsp::LanguageServerBinary> {
+        let env = delegate.shell_env().await;
+        Self::get_cached_server_binary(container_dir, env, &self.node).await
+    }
+
+    async fn check_if_user_installed(
+        &self,
+        delegate: &dyn LspAdapterDelegate,
+        _: Option<Toolchain>,
+        _: &gpui::AsyncApp,
+    ) -> Option<lsp::LanguageServerBinary> {
+        let path = delegate.which(Self::PACKAGE_NAME.as_ref()).await?;
+        let env = delegate.shell_env().await;
+
+        Some(LanguageServerBinary {
+            path,
+            env: Some(env),
+            arguments: vec!["start".into()],
+        })
+    }
+
+    async fn check_if_version_installed(
+        &self,
+        version: &Self::BinaryVersion,
+        container_dir: &PathBuf,
+        delegate: &dyn LspAdapterDelegate,
+    ) -> Option<lsp::LanguageServerBinary> {
+        let server_path = container_dir
+            .join("node_modules")
+            .join(Self::NODE_MODULE_RELATIVE_SERVER_PATH);
+
+        let should_install_language_server = self
+            .node
+            .should_install_npm_package(
+                Self::PACKAGE_NAME,
+                &server_path,
+                container_dir,
+                VersionStrategy::Latest(version),
+            )
+            .await;
+
+        if should_install_language_server {
+            None
+        } else {
+            let env = delegate.shell_env().await;
+            Some(LanguageServerBinary {
+                path: self.node.binary_path().await.ok()?,
+                env: Some(env),
+                arguments: vec![server_path.into(), "start".into()],
+            })
+        }
+    }
+
+    async fn fetch_latest_server_version(
+        &self,
+        _: &dyn LspAdapterDelegate,
+        _: bool,
+        _: &mut gpui::AsyncApp,
+    ) -> Result<Self::BinaryVersion> {
+        self.node
+            .npm_package_latest_version(Self::PACKAGE_NAME)
+            .await
+    }
+
+    async fn fetch_server_binary(
+        &self,
+        latest_version: Self::BinaryVersion,
+        container_dir: std::path::PathBuf,
+        delegate: &dyn LspAdapterDelegate,
+    ) -> Result<lsp::LanguageServerBinary> {
+        let server_path = container_dir
+            .join("node_modules")
+            .join(Self::NODE_MODULE_RELATIVE_SERVER_PATH);
+
+        self.node
+            .npm_install_packages(
+                &container_dir,
+                &[(Self::PACKAGE_NAME, &latest_version.to_string())],
+            )
+            .await?;
+
+        let env = delegate.shell_env().await;
+        Ok(LanguageServerBinary {
+            path: self.node.binary_path().await?,
+            env: Some(env),
+            arguments: vec![server_path.into(), "start".into()],
+        })
+    }
+}
+
+#[async_trait(?Send)]
+impl LspAdapter for BashLspAdapter {
+    fn name(&self) -> LanguageServerName {
+        LanguageServerName::new_static(Self::PACKAGE_NAME)
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use gpui::{AppContext as _, BorrowAppContext, Context, TestAppContext};

crates/languages/src/lib.rs

@@ -57,6 +57,7 @@ pub fn init(languages: Arc<LanguageRegistry>, fs: Arc<dyn Fs>, node: NodeRuntime
     #[cfg(feature = "load-grammars")]
     languages.register_native_grammars(grammars::native_grammars());
 
+    let bash_lsp_adapter = Arc::new(bash::BashLspAdapter::new(node.clone()));
     let c_lsp_adapter = Arc::new(c::CLspAdapter);
     let css_lsp_adapter = Arc::new(css::CssLspAdapter::new(node.clone()));
     let eslint_adapter = Arc::new(eslint::EsLintLspAdapter::new(node.clone(), fs.clone()));
@@ -88,6 +89,7 @@ pub fn init(languages: Arc<LanguageRegistry>, fs: Arc<dyn Fs>, node: NodeRuntime
         LanguageInfo {
             name: "bash",
             context: Some(Arc::new(bash::bash_task_context())),
+            adapters: vec![bash_lsp_adapter],
             ..Default::default()
         },
         LanguageInfo {

crates/mistral/src/mistral.rs

@@ -58,23 +58,19 @@ pub enum Model {
 
     #[serde(rename = "magistral-medium-latest", alias = "magistral-medium-latest")]
     MagistralMediumLatest,
-    #[serde(rename = "magistral-small-latest", alias = "magistral-small-latest")]
-    MagistralSmallLatest,
 
     #[serde(rename = "open-mistral-nemo", alias = "open-mistral-nemo")]
     OpenMistralNemo,
-    #[serde(rename = "open-codestral-mamba", alias = "open-codestral-mamba")]
-    OpenCodestralMamba,
 
     #[serde(rename = "devstral-medium-latest", alias = "devstral-medium-latest")]
     DevstralMediumLatest,
-    #[serde(rename = "devstral-small-latest", alias = "devstral-small-latest")]
-    DevstralSmallLatest,
 
-    #[serde(rename = "pixtral-12b-latest", alias = "pixtral-12b-latest")]
-    Pixtral12BLatest,
-    #[serde(rename = "pixtral-large-latest", alias = "pixtral-large-latest")]
-    PixtralLargeLatest,
+    #[serde(rename = "ministral-3b-latest", alias = "ministral-3b-latest")]
+    Ministral3bLatest,
+    #[serde(rename = "ministral-8b-latest", alias = "ministral-8b-latest")]
+    Ministral8bLatest,
+    #[serde(rename = "ministral-14b-latest", alias = "ministral-14b-latest")]
+    Ministral14bLatest,
 
     #[serde(rename = "custom")]
     Custom {
@@ -102,13 +98,8 @@ impl Model {
             "mistral-medium-latest" => Ok(Self::MistralMediumLatest),
             "mistral-small-latest" => Ok(Self::MistralSmallLatest),
             "magistral-medium-latest" => Ok(Self::MagistralMediumLatest),
-            "magistral-small-latest" => Ok(Self::MagistralSmallLatest),
             "open-mistral-nemo" => Ok(Self::OpenMistralNemo),
-            "open-codestral-mamba" => Ok(Self::OpenCodestralMamba),
             "devstral-medium-latest" => Ok(Self::DevstralMediumLatest),
-            "devstral-small-latest" => Ok(Self::DevstralSmallLatest),
-            "pixtral-12b-latest" => Ok(Self::Pixtral12BLatest),
-            "pixtral-large-latest" => Ok(Self::PixtralLargeLatest),
             invalid_id => anyhow::bail!("invalid model id '{invalid_id}'"),
         }
     }
@@ -120,13 +111,11 @@ impl Model {
             Self::MistralMediumLatest => "mistral-medium-latest",
             Self::MistralSmallLatest => "mistral-small-latest",
             Self::MagistralMediumLatest => "magistral-medium-latest",
-            Self::MagistralSmallLatest => "magistral-small-latest",
             Self::OpenMistralNemo => "open-mistral-nemo",
-            Self::OpenCodestralMamba => "open-codestral-mamba",
             Self::DevstralMediumLatest => "devstral-medium-latest",
-            Self::DevstralSmallLatest => "devstral-small-latest",
-            Self::Pixtral12BLatest => "pixtral-12b-latest",
-            Self::PixtralLargeLatest => "pixtral-large-latest",
+            Self::Ministral3bLatest => "ministral-3b-latest",
+            Self::Ministral8bLatest => "ministral-8b-latest",
+            Self::Ministral14bLatest => "ministral-14b-latest",
             Self::Custom { name, .. } => name,
         }
     }
@@ -138,13 +127,11 @@ impl Model {
             Self::MistralMediumLatest => "mistral-medium-latest",
             Self::MistralSmallLatest => "mistral-small-latest",
             Self::MagistralMediumLatest => "magistral-medium-latest",
-            Self::MagistralSmallLatest => "magistral-small-latest",
             Self::OpenMistralNemo => "open-mistral-nemo",
-            Self::OpenCodestralMamba => "open-codestral-mamba",
             Self::DevstralMediumLatest => "devstral-medium-latest",
-            Self::DevstralSmallLatest => "devstral-small-latest",
-            Self::Pixtral12BLatest => "pixtral-12b-latest",
-            Self::PixtralLargeLatest => "pixtral-large-latest",
+            Self::Ministral3bLatest => "ministral-3b-latest",
+            Self::Ministral8bLatest => "ministral-8b-latest",
+            Self::Ministral14bLatest => "ministral-14b-latest",
             Self::Custom {
                 name, display_name, ..
             } => display_name.as_ref().unwrap_or(name),
@@ -153,18 +140,16 @@ impl Model {
 
     pub fn max_token_count(&self) -> u64 {
         match self {
-            Self::CodestralLatest => 256000,
+            Self::CodestralLatest => 128000,
             Self::MistralLargeLatest => 256000,
             Self::MistralMediumLatest => 128000,
-            Self::MistralSmallLatest => 32000,
+            Self::MistralSmallLatest => 256000,
             Self::MagistralMediumLatest => 128000,
-            Self::MagistralSmallLatest => 128000,
-            Self::OpenMistralNemo => 131000,
-            Self::OpenCodestralMamba => 256000,
+            Self::OpenMistralNemo => 128000,
             Self::DevstralMediumLatest => 256000,
-            Self::DevstralSmallLatest => 256000,
-            Self::Pixtral12BLatest => 128000,
-            Self::PixtralLargeLatest => 128000,
+            Self::Ministral3bLatest => 256000,
+            Self::Ministral8bLatest => 256000,
+            Self::Ministral14bLatest => 256000,
             Self::Custom { max_tokens, .. } => *max_tokens,
         }
     }
@@ -185,31 +170,25 @@ impl Model {
             | Self::MistralMediumLatest
             | Self::MistralSmallLatest
             | Self::MagistralMediumLatest
-            | Self::MagistralSmallLatest
             | Self::OpenMistralNemo
-            | Self::OpenCodestralMamba
             | Self::DevstralMediumLatest
-            | Self::DevstralSmallLatest
-            | Self::Pixtral12BLatest
-            | Self::PixtralLargeLatest => true,
+            | Self::Ministral3bLatest
+            | Self::Ministral8bLatest
+            | Self::Ministral14bLatest => true,
             Self::Custom { supports_tools, .. } => supports_tools.unwrap_or(false),
         }
     }
 
     pub fn supports_images(&self) -> bool {
         match self {
-            Self::Pixtral12BLatest
-            | Self::PixtralLargeLatest
+            Self::MistralLargeLatest
             | Self::MistralMediumLatest
-            | Self::MistralSmallLatest => true,
-            Self::CodestralLatest
-            | Self::MistralLargeLatest
+            | Self::MistralSmallLatest
             | Self::MagistralMediumLatest
-            | Self::MagistralSmallLatest
-            | Self::OpenMistralNemo
-            | Self::OpenCodestralMamba
-            | Self::DevstralMediumLatest
-            | Self::DevstralSmallLatest => false,
+            | Self::Ministral3bLatest
+            | Self::Ministral8bLatest
+            | Self::Ministral14bLatest => true,
+            Self::CodestralLatest | Self::OpenMistralNemo | Self::DevstralMediumLatest => false,
             Self::Custom {
                 supports_images, ..
             } => supports_images.unwrap_or(false),
@@ -218,7 +197,7 @@ impl Model {
 
     pub fn supports_thinking(&self) -> bool {
         match self {
-            Self::MagistralMediumLatest | Self::MagistralSmallLatest => true,
+            Self::MagistralMediumLatest => true,
             Self::Custom {
                 supports_thinking, ..
             } => supports_thinking.unwrap_or(false),

crates/paths/src/paths.rs

@@ -11,6 +11,41 @@ use util::rel_path::RelPath;
 /// A default editorconfig file name to use when resolving project settings.
 pub const EDITORCONFIG_NAME: &str = ".editorconfig";
 
+/// The application name, used to derive platform-specific data, config, cache,
+/// and state directory paths.
+///
+/// Forks should change this to avoid colliding with Zed's user data.
+pub const APP_NAME: &str = "Zed";
+
+/// Lowercased form of [`APP_NAME`], for use in XDG-style paths on
+/// Linux/FreeBSD and the macOS `~/.config` fallback.
+pub const APP_NAME_LOWERCASE: &str = {
+    assert!(!APP_NAME.is_empty(), "APP_NAME must not be empty");
+    assert!(APP_NAME.as_bytes().is_ascii(), "APP_NAME must be ASCII");
+    const BYTES: [u8; APP_NAME.len()] = {
+        let mut bytes = [0u8; APP_NAME.len()];
+        let mut i = 0;
+        while i < APP_NAME.len() {
+            assert!(
+                APP_NAME.as_bytes()[i] != b'/' && APP_NAME.as_bytes()[i] != b'\\',
+                "APP_NAME must not contain path separators",
+            );
+            assert!(
+                APP_NAME.as_bytes()[i] >= 0x20,
+                "APP_NAME must not contain control characters"
+            );
+            bytes[i] = APP_NAME.as_bytes()[i];
+            i += 1;
+        }
+        bytes.make_ascii_lowercase();
+        bytes
+    };
+    match std::str::from_utf8(&BYTES) {
+        Ok(s) => s,
+        Err(_) => unreachable!(),
+    }
+};
+
 /// A custom data directory override, set only by `set_custom_data_dir`.
 /// This is used to override the default data directory location.
 /// The directory will be created if it doesn't exist when set.
@@ -91,16 +126,16 @@ pub fn config_dir() -> &'static PathBuf {
         } else if cfg!(target_os = "windows") {
             dirs::config_dir()
                 .expect("failed to determine RoamingAppData directory")
-                .join("Zed")
+                .join(APP_NAME)
         } else if cfg!(any(target_os = "linux", target_os = "freebsd")) {
             if let Ok(flatpak_xdg_config) = std::env::var("FLATPAK_XDG_CONFIG_HOME") {
                 flatpak_xdg_config.into()
             } else {
                 dirs::config_dir().expect("failed to determine XDG_CONFIG_HOME directory")
             }
-            .join("zed")
+            .join(APP_NAME_LOWERCASE)
         } else {
-            home_dir().join(".config").join("zed")
+            home_dir().join(".config").join(APP_NAME_LOWERCASE)
         }
     })
 }
@@ -111,18 +146,20 @@ pub fn data_dir() -> &'static PathBuf {
         if let Some(custom_dir) = CUSTOM_DATA_DIR.get() {
             custom_dir.clone()
         } else if cfg!(target_os = "macos") {
-            home_dir().join("Library/Application Support/Zed")
+            home_dir()
+                .join("Library/Application Support")
+                .join(APP_NAME)
         } else if cfg!(any(target_os = "linux", target_os = "freebsd")) {
             if let Ok(flatpak_xdg_data) = std::env::var("FLATPAK_XDG_DATA_HOME") {
                 flatpak_xdg_data.into()
             } else {
                 dirs::data_local_dir().expect("failed to determine XDG_DATA_HOME directory")
             }
-            .join("zed")
+            .join(APP_NAME_LOWERCASE)
         } else if cfg!(target_os = "windows") {
             dirs::data_local_dir()
                 .expect("failed to determine LocalAppData directory")
-                .join("Zed")
+                .join(APP_NAME)
         } else {
             config_dir().clone() // Fallback
         }
@@ -133,7 +170,7 @@ pub fn state_dir() -> &'static PathBuf {
     static STATE_DIR: OnceLock<PathBuf> = OnceLock::new();
     STATE_DIR.get_or_init(|| {
         if cfg!(target_os = "macos") {
-            return home_dir().join(".local").join("state").join("Zed");
+            return home_dir().join(".local").join("state").join(APP_NAME);
         }
 
         if cfg!(any(target_os = "linux", target_os = "freebsd")) {
@@ -142,12 +179,12 @@ pub fn state_dir() -> &'static PathBuf {
             } else {
                 dirs::state_dir().expect("failed to determine XDG_STATE_HOME directory")
             }
-            .join("zed");
+            .join(APP_NAME_LOWERCASE);
         } else {
             // Windows
             return dirs::data_local_dir()
                 .expect("failed to determine LocalAppData directory")
-                .join("Zed");
+                .join(APP_NAME);
         }
     })
 }
@@ -159,13 +196,13 @@ pub fn temp_dir() -> &'static PathBuf {
         if cfg!(target_os = "macos") {
             return dirs::cache_dir()
                 .expect("failed to determine cachesDirectory directory")
-                .join("Zed");
+                .join(APP_NAME);
         }
 
         if cfg!(target_os = "windows") {
             return dirs::cache_dir()
                 .expect("failed to determine LocalAppData directory")
-                .join("Zed");
+                .join(APP_NAME);
         }
 
         if cfg!(any(target_os = "linux", target_os = "freebsd")) {
@@ -174,10 +211,10 @@ pub fn temp_dir() -> &'static PathBuf {
             } else {
                 dirs::cache_dir().expect("failed to determine XDG_CACHE_HOME directory")
             }
-            .join("zed");
+            .join(APP_NAME_LOWERCASE);
         }
 
-        home_dir().join(".cache").join("zed")
+        home_dir().join(".cache").join(APP_NAME_LOWERCASE)
     })
 }
 
@@ -192,7 +229,7 @@ pub fn logs_dir() -> &'static PathBuf {
     static LOGS_DIR: OnceLock<PathBuf> = OnceLock::new();
     LOGS_DIR.get_or_init(|| {
         if cfg!(target_os = "macos") {
-            home_dir().join("Library/Logs/Zed")
+            home_dir().join("Library/Logs").join(APP_NAME)
         } else {
             data_dir().join("logs")
         }
@@ -208,13 +245,13 @@ pub fn remote_server_state_dir() -> &'static PathBuf {
 /// Returns the path to the `Zed.log` file.
 pub fn log_file() -> &'static PathBuf {
     static LOG_FILE: OnceLock<PathBuf> = OnceLock::new();
-    LOG_FILE.get_or_init(|| logs_dir().join("Zed.log"))
+    LOG_FILE.get_or_init(|| logs_dir().join(format!("{}.log", APP_NAME)))
 }
 
 /// Returns the path to the `Zed.log.old` file.
 pub fn old_log_file() -> &'static PathBuf {
     static OLD_LOG_FILE: OnceLock<PathBuf> = OnceLock::new();
-    OLD_LOG_FILE.get_or_init(|| logs_dir().join("Zed.log.old"))
+    OLD_LOG_FILE.get_or_init(|| logs_dir().join(format!("{}.log.old", APP_NAME)))
 }
 
 /// Returns the path to the database directory.

crates/picker/src/picker.rs

@@ -35,6 +35,12 @@ pub enum Direction {
     Down,
 }
 
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+pub enum ScrollBehavior {
+    RevealSelected,
+    PreserveOffset,
+}
+
 actions!(
     picker,
     [
@@ -687,9 +693,19 @@ impl<D: PickerDelegate> Picker<D> {
     }
 
     pub fn update_matches(&mut self, query: String, window: &mut Window, cx: &mut Context<Self>) {
+        self.update_matches_with_options(query, ScrollBehavior::RevealSelected, window, cx);
+    }
+
+    pub fn update_matches_with_options(
+        &mut self,
+        query: String,
+        scroll_behavior: ScrollBehavior,
+        window: &mut Window,
+        cx: &mut Context<Self>,
+    ) {
         let delegate_pending_update_matches = self.delegate.update_matches(query, window, cx);
 
-        self.matches_updated(window, cx);
+        self.matches_updated(scroll_behavior, window, cx);
         // This struct ensures that we can synchronously drop the task returned by the
         // delegate's `update_matches` method and the task that the picker is spawning.
         // If we simply capture the delegate's task into the picker's task, when the picker's
@@ -709,19 +725,40 @@ impl<D: PickerDelegate> Picker<D> {
                 })?;
                 delegate_pending_update_matches.await;
                 this.update_in(cx, |this, window, cx| {
-                    this.matches_updated(window, cx);
+                    this.matches_updated(scroll_behavior, window, cx);
                 })
             }),
         });
     }
 
-    fn matches_updated(&mut self, window: &mut Window, cx: &mut Context<Self>) {
-        if let ElementContainer::List(state) = &mut self.element_container {
-            state.reset(self.delegate.match_count());
+    fn matches_updated(
+        &mut self,
+        scroll_behavior: ScrollBehavior,
+        window: &mut Window,
+        cx: &mut Context<Self>,
+    ) {
+        let match_count = self.delegate.match_count();
+        match &mut self.element_container {
+            ElementContainer::List(state) => match scroll_behavior {
+                ScrollBehavior::RevealSelected => {
+                    state.reset(match_count);
+                    let index = self.delegate.selected_index();
+                    self.scroll_to_item_index(index);
+                }
+                ScrollBehavior::PreserveOffset => {
+                    let offset = state.logical_scroll_top();
+                    state.reset(match_count);
+                    state.scroll_to(offset);
+                }
+            },
+            ElementContainer::UniformList(_) => match scroll_behavior {
+                ScrollBehavior::RevealSelected => {
+                    let index = self.delegate.selected_index();
+                    self.scroll_to_item_index(index);
+                }
+                ScrollBehavior::PreserveOffset => {}
+            },
         }
-
-        let index = self.delegate.selected_index();
-        self.scroll_to_item_index(index);
         self.pending_update_matches = None;
         if let Some(secondary) = self.confirm_on_update.take() {
             self.do_confirm(secondary, window, cx);
@@ -752,6 +789,13 @@ impl<D: PickerDelegate> Picker<D> {
         }
     }
 
+    pub fn is_scrolled_to_end(&self) -> Option<bool> {
+        match &self.element_container {
+            ElementContainer::List(state) => state.is_scrolled_to_end(),
+            ElementContainer::UniformList(scroll_handle) => scroll_handle.is_scrolled_to_end(),
+        }
+    }
+
     fn render_element(
         &self,
         window: &mut Window,

crates/project/src/agent_server_store.rs

@@ -1606,6 +1606,13 @@ impl ExternalAgentServer for LocalRegistryNpxAgent {
 /// security settings, as the args don't change often. The registry will need to support this better
 /// at some point, but until then, this is a best-effort workaround that hopefully solves the issue
 /// for most users.
+///
+/// We use npm's hyphen-range syntax (`0.0.0 - <version>`, equivalent to `<=<version>`) instead of
+/// the more compact `<=<version>` form because on Windows, `npm` is `npm.cmd` (a batch file run by
+/// cmd.exe), and the quotes our shell builder emits are PowerShell string-literal syntax that PS
+/// strips during parsing. PS only re-adds CRT-style transport quotes around native command args
+/// containing whitespace, so `package@<=0.25.3` reaches cmd.exe bare and the unquoted `<` is
+/// interpreted as input redirection. See zed-industries/zed#55921.
 fn bounded_npm_package_spec(package_spec: &str) -> String {
     let Some((package_name, version)) = package_spec.rsplit_once('@') else {
         return package_spec.to_string();
@@ -1614,7 +1621,7 @@ fn bounded_npm_package_spec(package_spec: &str) -> String {
         return package_spec.to_string();
     }
 
-    format!("{package_name}@<={version}")
+    format!("{package_name}@0.0.0 - {version}")
 }
 
 struct LocalCustomAgent {
@@ -2025,11 +2032,11 @@ mod tests {
     fn builds_bounded_npm_package_specs() {
         assert_eq!(
             bounded_npm_package_spec("agent-package@1.2.3"),
-            "agent-package@<=1.2.3"
+            "agent-package@0.0.0 - 1.2.3"
         );
         assert_eq!(
             bounded_npm_package_spec("@scope/agent-package@1.2.3-beta.1"),
-            "@scope/agent-package@<=1.2.3-beta.1"
+            "@scope/agent-package@0.0.0 - 1.2.3-beta.1"
         );
         assert_eq!(
             bounded_npm_package_spec("@scope/agent-package"),

crates/project/src/context_server_store.rs

@@ -607,10 +607,7 @@ impl ContextServerStore {
 
         let server = state.server();
         let configuration = state.configuration();
-        let mut result = Ok(());
-        if let ContextServerState::Running { server, .. } = &state {
-            result = server.stop();
-        }
+        let result = server.stop();
         drop(state);
 
         self.update_server_state(

crates/project/src/git_store.rs

@@ -37,7 +37,7 @@ use git::{
         CreateWorktreeTarget, DiffType, FetchOptions, GitCommitTemplate, GitRepository,
         GitRepositoryCheckpoint, InitialGraphCommitData, LogOrder, LogSource, PushOptions, Remote,
         RemoteCommandOutput, RepoPath, ResetMode, SearchCommitArgs, UpstreamTrackingStatus,
-        Worktree as GitWorktree,
+        Worktree as GitWorktree, delete_branch_flag,
     },
     stash::{GitStash, StashEntry},
     status::{
@@ -2981,10 +2981,11 @@ impl GitStore {
         let repository_handle = Self::repository_for_request(&this, repository_id, &mut cx)?;
         let is_remote = envelope.payload.is_remote;
         let branch_name = envelope.payload.branch_name;
+        let force = envelope.payload.force;
 
         repository_handle
             .update(&mut cx, |repository_handle, _| {
-                repository_handle.delete_branch(is_remote, branch_name)
+                repository_handle.delete_branch(is_remote, branch_name, force)
             })
             .await??;
 
@@ -7367,21 +7368,19 @@ impl Repository {
         &mut self,
         is_remote: bool,
         branch_name: String,
+        force: bool,
     ) -> oneshot::Receiver<Result<()>> {
         let id = self.id;
+        let flag = delete_branch_flag(is_remote, force);
         self.send_job(
-            Some(
-                format!(
-                    "git branch {} {}",
-                    if is_remote { "-dr" } else { "-d" },
-                    branch_name
-                )
-                .into(),
-            ),
+            Some(format!("git branch {flag} {branch_name}").into()),
             move |repo, _cx| async move {
                 match repo {
                     RepositoryState::Local(state) => {
-                        state.backend.delete_branch(is_remote, branch_name).await
+                        state
+                            .backend
+                            .delete_branch(is_remote, branch_name, force)
+                            .await
                     }
                     RepositoryState::Remote(RemoteRepositoryState { project_id, client }) => {
                         client
@@ -7390,6 +7389,7 @@ impl Repository {
                                 repository_id: id.to_proto(),
                                 is_remote,
                                 branch_name,
+                                force,
                             })
                             .await?;
 

crates/project_panel/src/project_panel.rs

@@ -66,7 +66,9 @@ use ui::{
     StickyCandidate, Tooltip, WithScrollbar, prelude::*, v_flex,
 };
 use util::{
-    ResultExt, TakeUntilExt, TryFutureExt, maybe,
+    ResultExt, TakeUntilExt, TryFutureExt,
+    markdown::MarkdownInlineCode,
+    maybe,
     paths::{PathStyle, compare_paths},
     rel_path::{RelPath, RelPathBuf},
 };
@@ -2357,7 +2359,10 @@ impl ProjectPanel {
                             ""
                         };
 
-                        format!("{message_start} {path}?{unsaved_warning}")
+                        format!(
+                            "{message_start} {}?{unsaved_warning}",
+                            MarkdownInlineCode(path)
+                        )
                     }
                     _ => {
                         const CUTOFF_POINT: usize = 10;
@@ -2365,7 +2370,7 @@ impl ProjectPanel {
                             let truncated_path_counts = file_paths.len() - CUTOFF_POINT;
                             let mut paths = file_paths
                                 .iter()
-                                .map(|(_, _, path)| path.clone())
+                                .map(|(_, _, path)| MarkdownInlineCode(path).to_string())
                                 .take(CUTOFF_POINT)
                                 .collect::<Vec<_>>();
                             paths.truncate(CUTOFF_POINT);
@@ -2376,7 +2381,10 @@ impl ProjectPanel {
                             }
                             paths
                         } else {
-                            file_paths.iter().map(|(_, _, path)| path.clone()).collect()
+                            file_paths
+                                .iter()
+                                .map(|(_, _, path)| MarkdownInlineCode(path).to_string())
+                                .collect()
                         };
                         let unsaved_warning = if dirty_buffers == 0 {
                             String::new()

crates/project_panel/src/project_panel_tests.rs

@@ -11381,3 +11381,39 @@ impl Render for TestProjectItemView {
         Empty
     }
 }
+
+#[gpui::test]
+async fn test_delete_prompt_escapes_markdown_in_file_name(cx: &mut gpui::TestAppContext) {
+    init_test(cx);
+
+    let fs = FakeFs::new(cx.executor());
+    fs.insert_tree(
+        "/root",
+        json!({
+            "__somefile__": "",
+        }),
+    )
+    .await;
+
+    let project = Project::test(fs.clone(), ["/root".as_ref()], cx).await;
+    let window = cx.add_window(|window, cx| MultiWorkspace::test_new(project.clone(), window, cx));
+    let workspace = window
+        .read_with(cx, |mw, _| mw.workspace().clone())
+        .unwrap();
+    let cx = &mut VisualTestContext::from_window(window.into(), cx);
+    let panel = workspace.update_in(cx, ProjectPanel::new);
+    cx.run_until_parked();
+
+    select_path(&panel, "root/__somefile__", cx);
+    panel.update_in(cx, |panel, window, cx| {
+        panel.delete(&Delete { skip_prompt: false }, window, cx)
+    });
+    let (message, _detail) = cx
+        .pending_prompt()
+        .expect("delete should show a confirmation prompt");
+
+    assert_eq!(
+        message,
+        "Are you sure you want to permanently delete `__somefile__`?"
+    );
+}

crates/proto/proto/git.proto

@@ -215,6 +215,7 @@ message GitDeleteBranch {
   uint64 repository_id = 2;
   string branch_name = 3;
   bool is_remote = 4;
+  bool force = 5;
 }
 
 message GitDiff {

crates/recent_projects/Cargo.toml

@@ -64,6 +64,7 @@ fs.workspace = true
 gpui = { workspace = true, features = ["test-support"] }
 http_client.workspace = true
 language = { workspace = true, features = ["test-support"] }
+picker = { workspace = true, features = ["test-support"] }
 project = { workspace = true, features = ["test-support"] }
 release_channel.workspace = true
 remote = { workspace = true, features = ["test-support"] }

crates/recent_projects/src/recent_projects.rs

@@ -29,7 +29,7 @@ use gpui::{
 };
 
 use picker::{
-    Picker, PickerDelegate,
+    Picker, PickerDelegate, ScrollBehavior,
     highlighted_match_with_paths::{HighlightedMatch, HighlightedMatchWithPaths},
 };
 use project::{Worktree, git_store::Repository};
@@ -83,6 +83,15 @@ enum ProjectPickerEntry {
     RecentProject(StringMatch),
 }
 
+fn is_selectable_entry(entry: &ProjectPickerEntry) -> bool {
+    matches!(
+        entry,
+        ProjectPickerEntry::OpenFolder { .. }
+            | ProjectPickerEntry::ProjectGroup(_)
+            | ProjectPickerEntry::RecentProject(_)
+    )
+}
+
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
 enum ProjectPickerStyle {
     Modal,
@@ -814,8 +823,7 @@ pub struct RecentProjectsDelegate {
     selected_index: usize,
     render_paths: bool,
     create_new_window: bool,
-    // Flag to reset index when there is a new query vs not reset index when user delete an item
-    reset_selected_match_index: bool,
+    snap_selection_to_first_non_header_match: bool,
     has_any_non_local_projects: bool,
     project_connection_options: Option<RemoteConnectionOptions>,
     focus_handle: FocusHandle,
@@ -843,7 +851,7 @@ impl RecentProjectsDelegate {
             selected_index: 0,
             create_new_window,
             render_paths,
-            reset_selected_match_index: true,
+            snap_selection_to_first_non_header_match: true,
             has_any_non_local_projects: project_connection_options.is_some(),
             project_connection_options,
             focus_handle,
@@ -1067,14 +1075,14 @@ impl PickerDelegate for RecentProjectsDelegate {
 
         self.filtered_entries = entries;
 
-        if self.reset_selected_match_index {
+        if self.snap_selection_to_first_non_header_match {
             self.selected_index = self
                 .filtered_entries
                 .iter()
                 .position(|e| !matches!(e, ProjectPickerEntry::Header(_)))
                 .unwrap_or(0);
         }
-        self.reset_selected_match_index = true;
+        self.snap_selection_to_first_non_header_match = true;
         Task::ready(())
     }
 
@@ -2106,6 +2114,69 @@ impl RecentProjectsDelegate {
         .detach();
     }
 
+    /// Returns the new selection index after the entry at `deleted_index`
+    /// is removed.
+    ///
+    /// - Prefers the nearest entry matching `prefer_section` so the user
+    ///   stays in the same section they were navigating.
+    /// - Falls back to any other selectable entry so the picker doesn't
+    ///   land on a header.
+    fn replacement_index_after_deletion(
+        &self,
+        deleted_index: usize,
+        prefer_previous: bool,
+        prefer_section: fn(&ProjectPickerEntry) -> bool,
+    ) -> Option<usize> {
+        let replacement_index = |matches_entry: fn(&ProjectPickerEntry) -> bool| {
+            let next_index = self
+                .filtered_entries
+                .iter()
+                .enumerate()
+                .skip(deleted_index)
+                .find_map(|(index, entry)| matches_entry(entry).then_some(index));
+            let previous_index = self
+                .filtered_entries
+                .iter()
+                .enumerate()
+                .take(deleted_index.min(self.filtered_entries.len()))
+                .rev()
+                .find_map(|(index, entry)| matches_entry(entry).then_some(index));
+
+            if prefer_previous {
+                previous_index.or(next_index)
+            } else {
+                next_index.or(previous_index)
+            }
+        };
+
+        replacement_index(prefer_section).or_else(|| replacement_index(is_selectable_entry))
+    }
+
+    fn update_picker_after_recent_project_deletion(
+        picker: &mut Picker<Self>,
+        deleted_index: usize,
+        workspaces: Vec<RecentWorkspace>,
+        window: &mut Window,
+        cx: &mut Context<Picker<Self>>,
+    ) {
+        let prefer_previous = picker.is_scrolled_to_end() == Some(true);
+        picker.delegate.set_workspaces(workspaces);
+        picker.delegate.snap_selection_to_first_non_header_match = false;
+        picker.update_matches_with_options(
+            picker.query(cx),
+            ScrollBehavior::PreserveOffset,
+            window,
+            cx,
+        );
+        if let Some(replacement_index) = picker.delegate.replacement_index_after_deletion(
+            deleted_index,
+            prefer_previous,
+            |entry| matches!(entry, ProjectPickerEntry::RecentProject(_)),
+        ) {
+            picker.set_selected_index(replacement_index, None, false, window, cx);
+        }
+    }
+
     fn delete_recent_project(
         &self,
         ix: usize,
@@ -2115,7 +2186,10 @@ impl RecentProjectsDelegate {
         if let Some(ProjectPickerEntry::RecentProject(selected_match)) =
             self.filtered_entries.get(ix)
         {
-            let recent_workspace = self.workspaces[selected_match.candidate_id].clone();
+            let Some(recent_workspace) = self.workspaces.get(selected_match.candidate_id).cloned()
+            else {
+                return;
+            };
             let fs = self
                 .workspace
                 .upgrade()
@@ -2133,12 +2207,9 @@ impl RecentProjectsDelegate {
                     .await
                     .unwrap_or_default();
                 this.update_in(cx, move |picker, window, cx| {
-                    picker.delegate.set_workspaces(workspaces);
-                    picker
-                        .delegate
-                        .set_selected_index(ix.saturating_sub(1), window, cx);
-                    picker.delegate.reset_selected_match_index = false;
-                    picker.update_matches(picker.query(cx), window, cx);
+                    Self::update_picker_after_recent_project_deletion(
+                        picker, ix, workspaces, window, cx,
+                    );
                     // After deleting a project, we want to update the history manager to reflect the change.
                     // But we do not emit a update event when user opens a project, because it's handled in `workspace::load_workspace`.
                     if let Some(history_manager) = HistoryManager::global(cx) {
@@ -2234,7 +2305,7 @@ impl RecentProjectsDelegate {
 
 #[cfg(test)]
 mod tests {
-    use gpui::{TestAppContext, UpdateGlobal};
+    use gpui::{TestAppContext, UpdateGlobal, VisualTestContext};
 
     use serde_json::json;
     use settings::SettingsStore;
@@ -2243,6 +2314,220 @@ mod tests {
 
     use super::*;
 
+    // Test picker for the empty query:
+    //
+    //   [0] Header("Current Folders")
+    //   [1] OpenFolder(0)
+    //   [2] OpenFolder(1)
+    //   [3] Header("This Window")
+    //   [4] ProjectGroup(0)
+    //   [5] ProjectGroup(1)
+    //   [6] Header("Recent Projects")
+    //   [7..=26] RecentProject(0..=19)
+    //
+    const RECENT_PROJECT_COUNT: usize = 20;
+    const FIRST_RECENT_PROJECT: usize = 7;
+    const LAST_RECENT_PROJECT: usize = FIRST_RECENT_PROJECT + RECENT_PROJECT_COUNT - 1;
+
+    fn open_folder(index: usize) -> OpenFolderEntry {
+        OpenFolderEntry {
+            worktree_id: WorktreeId::from_usize(index),
+            name: format!("project-folder-{index}").into(),
+            path: PathBuf::from(format!("/current/project-folder-{index}")),
+            branch: None,
+            is_active: false,
+        }
+    }
+
+    fn project_group(index: usize) -> ProjectGroupKey {
+        ProjectGroupKey::new(
+            None,
+            PathList::new(&[PathBuf::from(format!("/this-window/project-{index}"))]),
+        )
+    }
+
+    fn recent_workspace(index: usize) -> RecentWorkspace {
+        let paths = PathList::new(&[PathBuf::from(format!("/recent/project-{index:02}"))]);
+        RecentWorkspace {
+            workspace_id: WorkspaceId::from_i64(index as i64),
+            location: SerializedWorkspaceLocation::Local,
+            paths: paths.clone(),
+            identity_paths: paths,
+            timestamp: Utc::now(),
+        }
+    }
+
+    fn recent_workspaces() -> Vec<RecentWorkspace> {
+        (0..RECENT_PROJECT_COUNT).map(recent_workspace).collect()
+    }
+
+    fn draw(cx: &mut VisualTestContext) {
+        cx.update(|window, cx| window.draw(cx).clear());
+    }
+
+    fn build_picker(
+        cx: &mut TestAppContext,
+    ) -> (
+        Entity<Picker<RecentProjectsDelegate>>,
+        &mut VisualTestContext,
+    ) {
+        init_test(cx);
+        let (picker, cx) = cx.add_window_view(|window, cx| {
+            let mut delegate = RecentProjectsDelegate::new(
+                WeakEntity::new_invalid(),
+                false,
+                cx.focus_handle(),
+                vec![open_folder(0), open_folder(1)],
+                vec![project_group(0), project_group(1)],
+                None,
+                ProjectPickerStyle::Modal,
+            );
+            delegate.set_workspaces(recent_workspaces());
+            Picker::list(delegate, window, cx)
+                .list_measure_all()
+                .show_scrollbar(true)
+                .max_height(Some(px(240.).into()))
+        });
+        draw(cx);
+        (picker, cx)
+    }
+
+    fn scroll_to_and_select(
+        picker: &Entity<Picker<RecentProjectsDelegate>>,
+        cx: &mut VisualTestContext,
+        index: usize,
+    ) -> usize {
+        picker.update_in(cx, |picker, window, cx| {
+            picker.set_selected_index(index, None, true, window, cx);
+        });
+        draw(cx);
+        picker.update(cx, |picker, _| picker.logical_scroll_top_index())
+    }
+
+    fn delete_recent_project_in_picker(
+        picker: &Entity<Picker<RecentProjectsDelegate>>,
+        cx: &mut VisualTestContext,
+        index: usize,
+    ) {
+        picker.update_in(cx, |picker, window, cx| {
+            let Some(ProjectPickerEntry::RecentProject(hit)) =
+                picker.delegate.filtered_entries.get(index)
+            else {
+                panic!("expected entry at {index} to be a recent project");
+            };
+            let mut workspaces = picker.delegate.workspaces.clone();
+            workspaces.remove(hit.candidate_id);
+            RecentProjectsDelegate::update_picker_after_recent_project_deletion(
+                picker, index, workspaces, window, cx,
+            );
+        });
+    }
+
+    #[track_caller]
+    fn assert_scroll_top_is(
+        picker: &Entity<Picker<RecentProjectsDelegate>>,
+        cx: &mut VisualTestContext,
+        expected: usize,
+        phase: &str,
+    ) {
+        picker.update(cx, |picker, _| {
+            assert_eq!(
+                picker.logical_scroll_top_index(),
+                expected,
+                "scroll top should remain at {expected} ({phase})"
+            );
+            assert_selected_entry_is_recent_project(picker);
+        });
+    }
+
+    #[track_caller]
+    fn assert_pinned_to_bottom(
+        picker: &Entity<Picker<RecentProjectsDelegate>>,
+        cx: &mut VisualTestContext,
+        phase: &str,
+    ) {
+        picker.update(cx, |picker, _| {
+            assert_eq!(
+                picker.is_scrolled_to_end(),
+                Some(true),
+                "picker should remain pinned to the bottom ({phase})"
+            );
+            assert!(
+                picker.logical_scroll_top_index() > 0,
+                "picker should not jump to the top while pinned to the bottom ({phase})"
+            );
+            assert_selected_entry_is_recent_project(picker);
+        });
+    }
+
+    #[track_caller]
+    fn assert_selected_entry_is_recent_project(picker: &Picker<RecentProjectsDelegate>) {
+        assert!(matches!(
+            picker
+                .delegate
+                .filtered_entries
+                .get(picker.delegate.selected_index),
+            Some(ProjectPickerEntry::RecentProject(_))
+        ));
+    }
+
+    #[gpui::test]
+    fn deleting_top_recent_project_preserves_scroll_position(cx: &mut TestAppContext) {
+        let target = FIRST_RECENT_PROJECT;
+        let (picker, cx) = build_picker(cx);
+        let scroll_top = scroll_to_and_select(&picker, cx, target);
+        assert!(
+            scroll_top > 0,
+            "test should start scrolled away from the top"
+        );
+
+        delete_recent_project_in_picker(&picker, cx, target);
+        assert_scroll_top_is(&picker, cx, scroll_top, "after delete");
+
+        // The picker re-runs layout on the next frame; the scroll position
+        // must still be preserved after that redraw.
+        draw(cx);
+        assert_scroll_top_is(&picker, cx, scroll_top, "after redraw");
+    }
+
+    #[gpui::test]
+    fn deleting_middle_recent_project_preserves_scroll_position(cx: &mut TestAppContext) {
+        let target = FIRST_RECENT_PROJECT + RECENT_PROJECT_COUNT / 2;
+        let (picker, cx) = build_picker(cx);
+        let scroll_top = scroll_to_and_select(&picker, cx, target);
+        assert!(
+            scroll_top > 0,
+            "test should start scrolled away from the top"
+        );
+
+        delete_recent_project_in_picker(&picker, cx, target);
+        assert_scroll_top_is(&picker, cx, scroll_top, "after delete");
+
+        draw(cx);
+        assert_scroll_top_is(&picker, cx, scroll_top, "after redraw");
+    }
+
+    #[gpui::test]
+    fn deleting_last_recent_project_preserves_scroll_position(cx: &mut TestAppContext) {
+        let target = LAST_RECENT_PROJECT;
+        let (picker, cx) = build_picker(cx);
+        scroll_to_and_select(&picker, cx, target);
+
+        picker.update(cx, |picker, _| {
+            assert_eq!(
+                picker.is_scrolled_to_end(),
+                Some(true),
+                "selecting the last entry should leave the picker pinned to the bottom"
+            );
+        });
+
+        delete_recent_project_in_picker(&picker, cx, target);
+        assert_pinned_to_bottom(&picker, cx, "after delete");
+
+        draw(cx);
+        assert_pinned_to_bottom(&picker, cx, "after redraw");
+    }
+
     #[gpui::test]
     async fn test_open_dev_container_action_with_single_config(cx: &mut TestAppContext) {
         let app_state = init_test(cx);

crates/settings_content/src/agent.rs

@@ -429,6 +429,7 @@ impl JsonSchema for LanguageModelProviderSetting {
                         "mistral",
                         "ollama",
                         "openai",
+                        "opencode",
                         "openrouter",
                         "vercel_ai_gateway",
                         "x_ai",

crates/settings_content/src/theme.rs

@@ -854,6 +854,30 @@ pub struct ThemeColorsContent {
     #[serde(rename = "editor.document_highlight.bracket_background")]
     pub editor_document_highlight_bracket_background: Option<String>,
 
+    /// Filled background color for added diff hunk row highlights in the editor.
+    #[serde(rename = "editor.diff_hunk.added.background")]
+    pub editor_diff_hunk_added_background: Option<String>,
+
+    /// Hollow background color for added diff hunk row highlights in the editor.
+    #[serde(rename = "editor.diff_hunk.added.hollow_background")]
+    pub editor_diff_hunk_added_hollow_background: Option<String>,
+
+    /// Hollow border color for added diff hunk row highlights in the editor.
+    #[serde(rename = "editor.diff_hunk.added.hollow_border")]
+    pub editor_diff_hunk_added_hollow_border: Option<String>,
+
+    /// Filled background color for deleted diff hunk row highlights in the editor.
+    #[serde(rename = "editor.diff_hunk.deleted.background")]
+    pub editor_diff_hunk_deleted_background: Option<String>,
+
+    /// Hollow background color for deleted diff hunk row highlights in the editor.
+    #[serde(rename = "editor.diff_hunk.deleted.hollow_background")]
+    pub editor_diff_hunk_deleted_hollow_background: Option<String>,
+
+    /// Hollow border color for deleted diff hunk row highlights in the editor.
+    #[serde(rename = "editor.diff_hunk.deleted.hollow_border")]
+    pub editor_diff_hunk_deleted_hollow_border: Option<String>,
+
     /// Terminal background color.
     #[serde(rename = "terminal.background")]
     pub terminal_background: Option<String>,

crates/settings_ui/src/pages.rs

@@ -17,4 +17,5 @@ pub use tool_permissions_setup::{
     render_delete_path_tool_config, render_edit_file_tool_config, render_fetch_tool_config,
     render_move_path_tool_config, render_restore_file_from_disk_tool_config,
     render_save_file_tool_config, render_terminal_tool_config, render_web_search_tool_config,
+    render_write_file_tool_config,
 };

crates/settings_ui/src/pages/tool_permissions_setup.rs

@@ -32,6 +32,12 @@ const TOOLS: &[ToolInfo] = &[
         description: "File editing operations",
         regex_explanation: "Patterns are matched against the file path being edited.",
     },
+    ToolInfo {
+        id: "write_file",
+        name: "Write File",
+        description: "File creation and overwrite operations",
+        regex_explanation: "Patterns are matched against the file path being written.",
+    },
     ToolInfo {
         id: "delete_path",
         name: "Delete Path",
@@ -303,6 +309,7 @@ fn get_tool_render_fn(
     match tool_id {
         "terminal" => render_terminal_tool_config,
         "edit_file" => render_edit_file_tool_config,
+        "write_file" => render_write_file_tool_config,
         "delete_path" => render_delete_path_tool_config,
         "copy_path" => render_copy_path_tool_config,
         "move_path" => render_move_path_tool_config,
@@ -1383,6 +1390,7 @@ macro_rules! tool_config_page_fn {
 
 tool_config_page_fn!(render_terminal_tool_config, "terminal");
 tool_config_page_fn!(render_edit_file_tool_config, "edit_file");
+tool_config_page_fn!(render_write_file_tool_config, "write_file");
 tool_config_page_fn!(render_delete_path_tool_config, "delete_path");
 tool_config_page_fn!(render_copy_path_tool_config, "copy_path");
 tool_config_page_fn!(render_move_path_tool_config, "move_path");

crates/theme/src/default_colors.rs

@@ -129,6 +129,12 @@ impl ThemeColors {
             editor_document_highlight_read_background: neutral().light_alpha().step_3(),
             editor_document_highlight_write_background: neutral().light_alpha().step_4(),
             editor_document_highlight_bracket_background: green().light_alpha().step_5(),
+            editor_diff_hunk_added_background: ADDED_COLOR.opacity(0.16),
+            editor_diff_hunk_added_hollow_background: ADDED_COLOR.opacity(0.08),
+            editor_diff_hunk_added_hollow_border: ADDED_COLOR.opacity(0.48),
+            editor_diff_hunk_deleted_background: REMOVED_COLOR.opacity(0.16),
+            editor_diff_hunk_deleted_hollow_background: REMOVED_COLOR.opacity(0.08),
+            editor_diff_hunk_deleted_hollow_border: REMOVED_COLOR.opacity(0.48),
             terminal_background: neutral().light().step_1(),
             terminal_foreground: black().light().step_12(),
             terminal_bright_foreground: black().light().step_11(),
@@ -276,6 +282,12 @@ impl ThemeColors {
             editor_document_highlight_read_background: neutral().dark_alpha().step_4(),
             editor_document_highlight_write_background: neutral().dark_alpha().step_4(),
             editor_document_highlight_bracket_background: green().dark_alpha().step_6(),
+            editor_diff_hunk_added_background: ADDED_COLOR.opacity(0.12),
+            editor_diff_hunk_added_hollow_background: ADDED_COLOR.opacity(0.06),
+            editor_diff_hunk_added_hollow_border: ADDED_COLOR.opacity(0.36),
+            editor_diff_hunk_deleted_background: REMOVED_COLOR.opacity(0.12),
+            editor_diff_hunk_deleted_hollow_background: REMOVED_COLOR.opacity(0.06),
+            editor_diff_hunk_deleted_hollow_border: REMOVED_COLOR.opacity(0.36),
             terminal_background: neutral().dark().step_1(),
             terminal_ansi_background: neutral().dark().step_1(),
             terminal_foreground: white().dark().step_12(),

crates/theme/src/fallback_themes.rs

@@ -185,6 +185,12 @@ pub(crate) fn zed_default_dark() -> Theme {
                 ),
                 editor_document_highlight_write_background: gpui::red(),
                 editor_document_highlight_bracket_background: gpui::green(),
+                editor_diff_hunk_added_background: ADDED_COLOR.opacity(0.12),
+                editor_diff_hunk_added_hollow_background: ADDED_COLOR.opacity(0.06),
+                editor_diff_hunk_added_hollow_border: ADDED_COLOR.opacity(0.36),
+                editor_diff_hunk_deleted_background: REMOVED_COLOR.opacity(0.12),
+                editor_diff_hunk_deleted_hollow_background: REMOVED_COLOR.opacity(0.06),
+                editor_diff_hunk_deleted_hollow_border: REMOVED_COLOR.opacity(0.36),
 
                 terminal_background: bg,
                 // todo("Use one colors for terminal")

crates/theme/src/styles/colors.rs

@@ -241,6 +241,18 @@ pub struct ThemeColors {
     ///
     /// Matching brackets in the cursor scope are highlighted with this background color.
     pub editor_document_highlight_bracket_background: Hsla,
+    /// Filled background color for added diff hunk row highlights in the editor.
+    pub editor_diff_hunk_added_background: Hsla,
+    /// Hollow background color for added diff hunk row highlights in the editor.
+    pub editor_diff_hunk_added_hollow_background: Hsla,
+    /// Hollow border color for added diff hunk row highlights in the editor.
+    pub editor_diff_hunk_added_hollow_border: Hsla,
+    /// Filled background color for deleted diff hunk row highlights in the editor.
+    pub editor_diff_hunk_deleted_background: Hsla,
+    /// Hollow background color for deleted diff hunk row highlights in the editor.
+    pub editor_diff_hunk_deleted_hollow_background: Hsla,
+    /// Hollow border color for deleted diff hunk row highlights in the editor.
+    pub editor_diff_hunk_deleted_hollow_border: Hsla,
 
     // ===
     // Terminal

crates/theme_settings/src/schema.rs

@@ -13,6 +13,13 @@ pub use settings::{FontWeightContent, WindowBackgroundContent};
 
 use theme::{StatusColorsRefinement, ThemeColorsRefinement};
 
+const LIGHT_DIFF_HUNK_FILLED_OPACITY: f32 = 0.16;
+const LIGHT_DIFF_HUNK_HOLLOW_BACKGROUND_OPACITY: f32 = 0.08;
+const LIGHT_DIFF_HUNK_HOLLOW_BORDER_OPACITY: f32 = 0.48;
+const DARK_DIFF_HUNK_FILLED_OPACITY: f32 = 0.12;
+const DARK_DIFF_HUNK_HOLLOW_BACKGROUND_OPACITY: f32 = 0.06;
+const DARK_DIFF_HUNK_HOLLOW_BORDER_OPACITY: f32 = 0.36;
+
 /// The content of a serialized theme family.
 #[derive(Debug, Clone, Serialize, Deserialize, JsonSchema)]
 pub struct ThemeFamilyContent {
@@ -230,6 +237,7 @@ pub fn status_colors_refinement(colors: &settings::StatusColorsContent) -> Statu
 pub fn theme_colors_refinement(
     this: &settings::ThemeColorsContent,
     status_colors: &StatusColorsRefinement,
+    is_light: bool,
 ) -> ThemeColorsRefinement {
     let border = this
         .border
@@ -278,6 +286,29 @@ pub fn theme_colors_refinement(
         .as_ref()
         .and_then(|color| try_parse_color(color).ok())
         .or(search_match_background);
+    let version_control_added = this
+        .version_control_added
+        .as_ref()
+        .and_then(|color| try_parse_color(color).ok())
+        .or(status_colors.created);
+    let version_control_deleted = this
+        .version_control_deleted
+        .as_ref()
+        .and_then(|color| try_parse_color(color).ok())
+        .or(status_colors.deleted);
+    let (hunk_fill, hunk_hollow_bg, hunk_hollow_border) = if is_light {
+        (
+            LIGHT_DIFF_HUNK_FILLED_OPACITY,
+            LIGHT_DIFF_HUNK_HOLLOW_BACKGROUND_OPACITY,
+            LIGHT_DIFF_HUNK_HOLLOW_BORDER_OPACITY,
+        )
+    } else {
+        (
+            DARK_DIFF_HUNK_FILLED_OPACITY,
+            DARK_DIFF_HUNK_HOLLOW_BACKGROUND_OPACITY,
+            DARK_DIFF_HUNK_HOLLOW_BORDER_OPACITY,
+        )
+    };
     ThemeColorsRefinement {
         border,
         border_variant: this
@@ -576,6 +607,36 @@ pub fn theme_colors_refinement(
             .as_ref()
             .and_then(|color| try_parse_color(color).ok())
             .or(editor_document_highlight_read_background),
+        editor_diff_hunk_added_background: this
+            .editor_diff_hunk_added_background
+            .as_ref()
+            .and_then(|color| try_parse_color(color).ok())
+            .or_else(|| version_control_added.map(|c| c.opacity(hunk_fill))),
+        editor_diff_hunk_added_hollow_background: this
+            .editor_diff_hunk_added_hollow_background
+            .as_ref()
+            .and_then(|color| try_parse_color(color).ok())
+            .or_else(|| version_control_added.map(|c| c.opacity(hunk_hollow_bg))),
+        editor_diff_hunk_added_hollow_border: this
+            .editor_diff_hunk_added_hollow_border
+            .as_ref()
+            .and_then(|color| try_parse_color(color).ok())
+            .or_else(|| version_control_added.map(|c| c.opacity(hunk_hollow_border))),
+        editor_diff_hunk_deleted_background: this
+            .editor_diff_hunk_deleted_background
+            .as_ref()
+            .and_then(|color| try_parse_color(color).ok())
+            .or_else(|| version_control_deleted.map(|c| c.opacity(hunk_fill))),
+        editor_diff_hunk_deleted_hollow_background: this
+            .editor_diff_hunk_deleted_hollow_background
+            .as_ref()
+            .and_then(|color| try_parse_color(color).ok())
+            .or_else(|| version_control_deleted.map(|c| c.opacity(hunk_hollow_bg))),
+        editor_diff_hunk_deleted_hollow_border: this
+            .editor_diff_hunk_deleted_hollow_border
+            .as_ref()
+            .and_then(|color| try_parse_color(color).ok())
+            .or_else(|| version_control_deleted.map(|c| c.opacity(hunk_hollow_border))),
         terminal_background: this
             .terminal_background
             .as_ref()
@@ -696,16 +757,8 @@ pub fn theme_colors_refinement(
             .link_text_hover
             .as_ref()
             .and_then(|color| try_parse_color(color).ok()),
-        version_control_added: this
-            .version_control_added
-            .as_ref()
-            .and_then(|color| try_parse_color(color).ok())
-            .or(status_colors.created),
-        version_control_deleted: this
-            .version_control_deleted
-            .as_ref()
-            .and_then(|color| try_parse_color(color).ok())
-            .or(status_colors.deleted),
+        version_control_added,
+        version_control_deleted,
         version_control_modified: this
             .version_control_modified
             .as_ref()
@@ -856,7 +909,165 @@ fn try_parse_color(color: &str) -> anyhow::Result<Hsla> {
 
 #[cfg(test)]
 mod tests {
-    use super::*;
+    use theme::StatusColorsRefinement;
+
+    use super::{
+        StatusColorsContent, ThemeColorsContent, status_colors_refinement, theme_colors_refinement,
+        try_parse_color,
+    };
+
+    #[test]
+    fn explicit_diff_hunk_colors_take_precedence_over_fallbacks() {
+        let mut colors = ThemeColorsContent::default();
+        colors.editor_diff_hunk_added_background = Some("#112233".to_string());
+        colors.editor_diff_hunk_added_hollow_background = Some("#223344".to_string());
+        colors.editor_diff_hunk_added_hollow_border = Some("#334455".to_string());
+        colors.editor_diff_hunk_deleted_background = Some("#445566".to_string());
+        colors.editor_diff_hunk_deleted_hollow_background = Some("#556677".to_string());
+        colors.editor_diff_hunk_deleted_hollow_border = Some("#667788".to_string());
+        colors.version_control_added = Some("#00ff00".to_string());
+        colors.version_control_deleted = Some("#ff0000".to_string());
+
+        let refinement = theme_colors_refinement(
+            &colors,
+            &status_colors_refinement(&StatusColorsContent::default()),
+            true,
+        );
+
+        assert_eq!(
+            refinement.editor_diff_hunk_added_background,
+            Some(parse_color("#112233"))
+        );
+        assert_eq!(
+            refinement.editor_diff_hunk_added_hollow_background,
+            Some(parse_color("#223344"))
+        );
+        assert_eq!(
+            refinement.editor_diff_hunk_added_hollow_border,
+            Some(parse_color("#334455"))
+        );
+        assert_eq!(
+            refinement.editor_diff_hunk_deleted_background,
+            Some(parse_color("#445566"))
+        );
+        assert_eq!(
+            refinement.editor_diff_hunk_deleted_hollow_background,
+            Some(parse_color("#556677"))
+        );
+        assert_eq!(
+            refinement.editor_diff_hunk_deleted_hollow_border,
+            Some(parse_color("#667788"))
+        );
+    }
+
+    #[test]
+    fn diff_hunk_colors_fallback_to_version_control_colors() {
+        let mut colors = ThemeColorsContent::default();
+        colors.version_control_added = Some("#00ff00".to_string());
+        colors.version_control_deleted = Some("#ff0000".to_string());
+
+        let refinement = theme_colors_refinement(
+            &colors,
+            &status_colors_refinement(&StatusColorsContent::default()),
+            true,
+        );
+
+        let added = parse_color("#00ff00");
+        let deleted = parse_color("#ff0000");
+
+        assert_eq!(
+            refinement.editor_diff_hunk_added_background,
+            Some(added.opacity(0.16))
+        );
+        assert_eq!(
+            refinement.editor_diff_hunk_added_hollow_background,
+            Some(added.opacity(0.08))
+        );
+        assert_eq!(
+            refinement.editor_diff_hunk_added_hollow_border,
+            Some(added.opacity(0.48))
+        );
+        assert_eq!(
+            refinement.editor_diff_hunk_deleted_background,
+            Some(deleted.opacity(0.16))
+        );
+        assert_eq!(
+            refinement.editor_diff_hunk_deleted_hollow_background,
+            Some(deleted.opacity(0.08))
+        );
+        assert_eq!(
+            refinement.editor_diff_hunk_deleted_hollow_border,
+            Some(deleted.opacity(0.48))
+        );
+    }
+
+    #[test]
+    fn diff_hunk_opacity_fallbacks_use_correct_values_for_light_and_dark_themes() {
+        let mut colors = ThemeColorsContent::default();
+        colors.version_control_added = Some("#00ff00".to_string());
+
+        let light_refinement = theme_colors_refinement(
+            &colors,
+            &status_colors_refinement(&StatusColorsContent::default()),
+            true,
+        );
+        let dark_refinement = theme_colors_refinement(
+            &colors,
+            &status_colors_refinement(&StatusColorsContent::default()),
+            false,
+        );
+
+        let added = parse_color("#00ff00");
+
+        assert_eq!(
+            light_refinement.editor_diff_hunk_added_background,
+            Some(added.opacity(0.16))
+        );
+        assert_eq!(
+            light_refinement.editor_diff_hunk_added_hollow_background,
+            Some(added.opacity(0.08))
+        );
+        assert_eq!(
+            light_refinement.editor_diff_hunk_added_hollow_border,
+            Some(added.opacity(0.48))
+        );
+
+        assert_eq!(
+            dark_refinement.editor_diff_hunk_added_background,
+            Some(added.opacity(0.12))
+        );
+        assert_eq!(
+            dark_refinement.editor_diff_hunk_added_hollow_background,
+            Some(added.opacity(0.06))
+        );
+        assert_eq!(
+            dark_refinement.editor_diff_hunk_added_hollow_border,
+            Some(added.opacity(0.36))
+        );
+    }
+
+    #[test]
+    fn diff_hunk_fallbacks_are_absent_when_status_and_version_control_colors_are_missing() {
+        let refinement = theme_colors_refinement(
+            &ThemeColorsContent::default(),
+            &status_colors_refinement(&StatusColorsContent::default()),
+            true,
+        );
+
+        assert_eq!(refinement.editor_diff_hunk_added_background, None);
+        assert_eq!(refinement.editor_diff_hunk_added_hollow_background, None);
+        assert_eq!(refinement.editor_diff_hunk_added_hollow_border, None);
+        assert_eq!(refinement.editor_diff_hunk_deleted_background, None);
+        assert_eq!(refinement.editor_diff_hunk_deleted_hollow_background, None);
+        assert_eq!(refinement.editor_diff_hunk_deleted_hollow_border, None);
+    }
+
+    fn parse_color(color: &str) -> gpui::Hsla {
+        match try_parse_color(color) {
+            Ok(color) => color,
+            Err(error) => panic!("failed to parse color {color}: {error}"),
+        }
+    }
 
     #[test]
     fn helix_jump_label_color_uses_theme_color_or_status_error() {
@@ -867,8 +1078,11 @@ mod tests {
             ..Default::default()
         };
 
-        let fallback_refinement =
-            theme_colors_refinement(&ThemeColorsContent::default(), &status_colors);
+        let fallback_refinement = theme_colors_refinement(
+            &ThemeColorsContent::default(),
+            &status_colors,
+            Default::default(),
+        );
 
         assert_eq!(
             fallback_refinement.vim_helix_jump_label_foreground,
@@ -881,6 +1095,7 @@ mod tests {
                 ..Default::default()
             },
             &status_colors,
+            Default::default(),
         );
 
         assert_eq!(

crates/theme_settings/src/settings.rs

@@ -476,10 +476,12 @@ impl ThemeSettings {
         }
         let status_color_refinement = status_colors_refinement(&theme_overrides.status);
 
-        base_theme.styles.colors.refine(&theme_colors_refinement(
+        let theme_color_refinement = theme_colors_refinement(
             &theme_overrides.colors,
             &status_color_refinement,
-        ));
+            base_theme.appearance.is_light(),
+        );
+        base_theme.styles.colors.refine(&theme_color_refinement);
         base_theme.styles.status.refine(&status_color_refinement);
         merge_player_colors(&mut base_theme.styles.player, &theme_overrides.players);
         merge_accent_colors(&mut base_theme.styles.accents, &theme_overrides.accents);

crates/theme_settings/src/theme_settings.rs

@@ -296,8 +296,11 @@ pub fn refine_theme(theme: &ThemeContent) -> Theme {
         AppearanceContent::Light => ThemeColors::light(),
         AppearanceContent::Dark => ThemeColors::dark(),
     };
-    let mut theme_colors_refinement =
-        theme_colors_refinement(&theme.style.colors, &status_colors_refinement);
+    let mut theme_colors_refinement = theme_colors_refinement(
+        &theme.style.colors,
+        &status_colors_refinement,
+        theme.appearance == AppearanceContent::Light,
+    );
     theme::apply_theme_color_defaults(&mut theme_colors_refinement, &refined_player_colors);
     refined_theme_colors.refine(&theme_colors_refinement);
 

crates/vim/src/motion.rs

@@ -2452,7 +2452,7 @@ fn find_matching_bracket_text_based(
         .find_map(|(ch, char_offset)| get_bracket_pair(ch).map(|info| (info, char_offset)));
 
     if bracket_info.is_none() {
-        return find_matching_c_preprocessor_directive(map, line_range);
+        return find_matching_c_preprocessor_directive(map, line_range, offset);
     }
 
     let (open, close, is_opening) = bracket_info?.0;
@@ -2489,18 +2489,20 @@ fn find_matching_bracket_text_based(
 fn find_matching_c_preprocessor_directive(
     map: &DisplaySnapshot,
     line_range: Range<MultiBufferOffset>,
+    offset: MultiBufferOffset,
 ) -> Option<MultiBufferOffset> {
     let line_start = map
         .buffer_chars_at(line_range.start)
         .skip_while(|(c, _)| *c == ' ' || *c == '\t')
+        .take_while(|(c, char_offset)| *char_offset < line_range.end && !c.is_whitespace())
         .map(|(c, _)| c)
-        .take(6)
         .collect::<String>();
 
-    if line_start.starts_with("#if")
-        || line_start.starts_with("#else")
-        || line_start.starts_with("#elif")
-    {
+    if line_range.start + line_start.len() < offset {
+        return None;
+    }
+
+    if line_start.starts_with("#if") || line_start.starts_with("#el") {
         let mut depth = 0i32;
         for (ch, char_offset) in map.buffer_chars_at(line_range.end) {
             if ch != '\n' {
@@ -2618,8 +2620,30 @@ fn matching(
 
     // Ensure the range is contained by the current line.
     let mut line_end = map.next_line_boundary(point).0;
-    if line_end == point {
-        line_end = map.max_point().to_point(map);
+    let max_point = map.max_point().to_point(map);
+
+    // Only widen to EOF when the cursor is actually at EOF.
+    // This avoids expanding a blank current line into start..EOF.
+    if line_end == point && point == max_point {
+        line_end = max_point;
+    }
+
+    let line_range = map.prev_line_boundary(point).0..line_end;
+    let line_range = line_range.start.to_offset(&map.buffer_snapshot())
+        ..line_range.end.to_offset(&map.buffer_snapshot());
+
+    if let Some(preproc_range) = find_matching_c_preprocessor_directive(map, line_range, offset) {
+        return preproc_range.to_display_point(map);
+    }
+
+    if let Some((open_range, close_range)) = comment_delimiter_pair(map, offset) {
+        if open_range.contains(&offset) {
+            return close_range.start.to_display_point(map);
+        }
+
+        if close_range.contains(&offset) {
+            return open_range.start.to_display_point(map);
+        }
     }
 
     let is_quote_char = |ch: char| matches!(ch, '\'' | '"' | '`');
@@ -2729,32 +2753,6 @@ fn matching(
             continue;
         }
 
-        if let Some((open_range, close_range)) = comment_delimiter_pair(map, offset) {
-            if open_range.contains(&offset) {
-                return close_range.start.to_display_point(map);
-            }
-
-            if close_range.contains(&offset) {
-                return open_range.start.to_display_point(map);
-            }
-
-            let open_candidate = (open_range.start >= offset
-                && line_range.contains(&open_range.start))
-            .then_some((open_range.start.saturating_sub(offset), close_range.start));
-
-            let close_candidate = (close_range.start >= offset
-                && line_range.contains(&close_range.start))
-            .then_some((close_range.start.saturating_sub(offset), open_range.start));
-
-            if let Some((_, destination)) = [open_candidate, close_candidate]
-                .into_iter()
-                .flatten()
-                .min_by_key(|(distance, _)| *distance)
-            {
-                return destination.to_display_point(map);
-            }
-        }
-
         closest_pair_destination
             .map(|destination| destination.to_display_point(map))
             .unwrap_or_else(|| {
@@ -3663,6 +3661,10 @@ mod test {
         cx.shared_state().await.assert_eq(indoc! {r"/*
           this is a comment
         ˇ*/"});
+        cx.simulate_shared_keystrokes("k %").await;
+        cx.shared_state().await.assert_eq(indoc! {r"/*
+        ˇ  this is a comment
+        */"});
 
         cx.set_shared_state("ˇ// comment").await;
         cx.simulate_shared_keystrokes("%").await;
@@ -3673,48 +3675,53 @@ mod test {
     async fn test_matching_preprocessor_directives(cx: &mut gpui::TestAppContext) {
         let mut cx = NeovimBackedTestContext::new(cx).await;
 
-        cx.set_shared_state(indoc! {r"#ˇif
+        cx.set_shared_state(indoc! {r"
+          #ˇif
 
-            #else
+          #else
 
-            #endif
-            "})
+          #endif
+        "})
             .await;
         cx.simulate_shared_keystrokes("%").await;
-        cx.shared_state().await.assert_eq(indoc! {r"#if
+        cx.shared_state().await.assert_eq(indoc! {r"
+          #if
 
           ˇ#else
 
           #endif
-          "});
+        "});
 
         cx.simulate_shared_keystrokes("%").await;
-        cx.shared_state().await.assert_eq(indoc! {r"#if
+        cx.shared_state().await.assert_eq(indoc! {r"
+          #if
 
           #else
 
           ˇ#endif
-          "});
+        "});
 
         cx.simulate_shared_keystrokes("%").await;
-        cx.shared_state().await.assert_eq(indoc! {r"ˇ#if
+        cx.shared_state().await.assert_eq(indoc! {r"
+          ˇ#if
 
           #else
 
           #endif
-          "});
+        "});
 
         cx.set_shared_state(indoc! {r"
-            #ˇif
-              #if
-
-              #else
-
-              #endif
+          #ˇif
+            #if
 
             #else
+
             #endif
-            "})
+
+          #else
+
+          #endif
+        "})
             .await;
 
         cx.simulate_shared_keystrokes("%").await;
@@ -3727,8 +3734,9 @@ mod test {
               #endif
 
             ˇ#else
+
             #endif
-            "});
+          "});
 
         cx.simulate_shared_keystrokes("% %").await;
         cx.shared_state().await.assert_eq(indoc! {r"
@@ -3740,8 +3748,9 @@ mod test {
               #endif
 
             #else
+
             #endif
-            "});
+          "});
         cx.simulate_shared_keystrokes("j % % %").await;
         cx.shared_state().await.assert_eq(indoc! {r"
             #if
@@ -3752,8 +3761,28 @@ mod test {
               #endif
 
             #else
+
             #endif
-            "});
+          "});
+
+        cx.set_shared_state(indoc! {r"
+          #if definedˇ(something)
+
+          #endif
+        "})
+            .await;
+        cx.simulate_shared_keystrokes("%").await;
+        cx.shared_state().await.assert_eq(indoc! {r"
+          #if defined(somethingˇ)
+
+          #endif
+        "});
+        cx.simulate_shared_keystrokes("0 %").await;
+        cx.shared_state().await.assert_eq(indoc! {r"
+          #if defined(something)
+
+          ˇ#endif
+        "});
     }
 
     #[gpui::test]

crates/vim/src/rewrap.rs

@@ -22,7 +22,7 @@ pub(crate) fn register(editor: &mut Editor, cx: &mut Context<Vim>) {
         vim.update_editor(cx, |vim, editor, cx| {
             editor.transact(window, cx, |editor, window, cx| {
                 let mut positions = vim.save_selection_starts(editor, cx);
-                editor.rewrap_impl(
+                editor.rewrap(
                     RewrapOptions {
                         override_language_settings: true,
                         line_length: action.line_length,
@@ -74,7 +74,7 @@ impl Vim {
                         );
                     });
                 });
-                editor.rewrap_impl(
+                editor.rewrap(
                     RewrapOptions {
                         override_language_settings: true,
                         ..Default::default()
@@ -112,7 +112,7 @@ impl Vim {
                         object.expand_selection(map, selection, around, times);
                     });
                 });
-                editor.rewrap_impl(
+                editor.rewrap(
                     RewrapOptions {
                         override_language_settings: true,
                         ..Default::default()

crates/vim/test_data/test_matching_comments.json

@@ -5,6 +5,9 @@
 {"Get":{"state":"ˇ/*\n  this is a comment\n*/","mode":"Normal"}}
 {"Key":"%"}
 {"Get":{"state":"/*\n  this is a comment\nˇ*/","mode":"Normal"}}
+{"Key":"k"}
+{"Key":"%"}
+{"Get":{"state":"/*\nˇ  this is a comment\n*/","mode":"Normal"}}
 {"Put":{"state":"ˇ// comment"}}
 {"Key":"%"}
 {"Get":{"state":"ˇ// comment","mode":"Normal"}}

crates/vim/test_data/test_matching_preprocessor_directives.json

@@ -5,14 +5,20 @@
 {"Get":{"state":"#if\n\n#else\n\nˇ#endif\n","mode":"Normal"}}
 {"Key":"%"}
 {"Get":{"state":"ˇ#if\n\n#else\n\n#endif\n","mode":"Normal"}}
-{"Put":{"state":"#ˇif\n  #if\n\n  #else\n\n  #endif\n\n#else\n#endif\n"}}
+{"Put":{"state":"#ˇif\n  #if\n\n  #else\n\n  #endif\n\n#else\n\n#endif\n"}}
 {"Key":"%"}
-{"Get":{"state":"#if\n  #if\n\n  #else\n\n  #endif\n\nˇ#else\n#endif\n","mode":"Normal"}}
+{"Get":{"state":"#if\n  #if\n\n  #else\n\n  #endif\n\nˇ#else\n\n#endif\n","mode":"Normal"}}
 {"Key":"%"}
 {"Key":"%"}
-{"Get":{"state":"ˇ#if\n  #if\n\n  #else\n\n  #endif\n\n#else\n#endif\n","mode":"Normal"}}
+{"Get":{"state":"ˇ#if\n  #if\n\n  #else\n\n  #endif\n\n#else\n\n#endif\n","mode":"Normal"}}
 {"Key":"j"}
 {"Key":"%"}
 {"Key":"%"}
 {"Key":"%"}
-{"Get":{"state":"#if\n  ˇ#if\n\n  #else\n\n  #endif\n\n#else\n#endif\n","mode":"Normal"}}
+{"Get":{"state":"#if\n  ˇ#if\n\n  #else\n\n  #endif\n\n#else\n\n#endif\n","mode":"Normal"}}
+{"Put":{"state":"#if definedˇ(something)\n\n#endif\n"}}
+{"Key":"%"}
+{"Get":{"state":"#if defined(somethingˇ)\n\n#endif\n","mode":"Normal"}}
+{"Key":"0"}
+{"Key":"%"}
+{"Get":{"state":"#if defined(something)\n\nˇ#endif\n","mode":"Normal"}}

crates/workspace/src/tasks.rs

@@ -121,7 +121,7 @@ impl Workspace {
         let save_action = match save_strategy {
             SaveStrategy::All => {
                 let save_all = workspace.update_in(cx, |workspace, window, cx| {
-                    let task = workspace.save_all_internal(SaveIntent::SaveAll, window, cx);
+                    let task = workspace.save_all_internal(SaveIntent::SaveAll, true, window, cx);
                     cx.background_spawn(async { task.await.map(|_| ()) })
                 });
                 save_all.ok()

crates/workspace/src/workspace.rs

@@ -3305,9 +3305,30 @@ impl Workspace {
                 }
             }
 
+            // Hot-exit silently writes dirty buffers to the DB; only allow it
+            // if the workspace will be reachable again, either via session
+            // restore or by reopening its folder paths. Otherwise prompt, so
+            // we don't orphan the buffers.
+            let allow_hot_exit_serialization = close_intent == CloseIntent::Quit
+                || save_last_workspace
+                || this
+                    .read_with(cx, |workspace, cx| {
+                        workspace
+                            .project
+                            .read(cx)
+                            .visible_worktrees(cx)
+                            .next()
+                            .is_some()
+                    })
+                    .unwrap_or(false);
             let save_result = this
                 .update_in(cx, |this, window, cx| {
-                    this.save_all_internal(SaveIntent::Close, window, cx)
+                    this.save_all_internal(
+                        SaveIntent::Close,
+                        allow_hot_exit_serialization,
+                        window,
+                        cx,
+                    )
                 })?
                 .await;
 
@@ -3328,6 +3349,7 @@ impl Workspace {
     fn save_all(&mut self, action: &SaveAll, window: &mut Window, cx: &mut Context<Self>) {
         self.save_all_internal(
             action.save_intent.unwrap_or(SaveIntent::SaveAll),
+            true,
             window,
             cx,
         )
@@ -3425,12 +3447,13 @@ impl Workspace {
         window: &mut Window,
         cx: &mut Context<Self>,
     ) -> Task<Result<bool>> {
-        self.save_all_internal(SaveIntent::Close, window, cx)
+        self.save_all_internal(SaveIntent::Close, true, window, cx)
     }
 
     fn save_all_internal(
         &mut self,
         mut save_intent: SaveIntent,
+        allow_hot_exit_serialization: bool,
         window: &mut Window,
         cx: &mut Context<Self>,
     ) -> Task<Result<bool>> {
@@ -3457,23 +3480,27 @@ impl Workspace {
             let dirty_items = if save_intent == SaveIntent::Close && !dirty_items.is_empty() {
                 let mut serialize_tasks = Vec::new();
                 let mut remaining_dirty_items = Vec::new();
-                workspace.update_in(cx, |workspace, window, cx| {
-                    for (pane, item) in dirty_items {
-                        if let Some(task) = item
-                            .to_serializable_item_handle(cx)
-                            .and_then(|handle| handle.serialize(workspace, true, window, cx))
-                        {
-                            serialize_tasks.push((pane, item, task));
-                        } else {
+                if allow_hot_exit_serialization {
+                    workspace.update_in(cx, |workspace, window, cx| {
+                        for (pane, item) in dirty_items {
+                            if let Some(task) = item
+                                .to_serializable_item_handle(cx)
+                                .and_then(|handle| handle.serialize(workspace, true, window, cx))
+                            {
+                                serialize_tasks.push((pane, item, task));
+                            } else {
+                                remaining_dirty_items.push((pane, item));
+                            }
+                        }
+                    })?;
+
+                    for (pane, item, task) in serialize_tasks {
+                        if task.await.log_err().is_none() {
                             remaining_dirty_items.push((pane, item));
                         }
                     }
-                })?;
-
-                for (pane, item, task) in serialize_tasks {
-                    if task.await.log_err().is_none() {
-                        remaining_dirty_items.push((pane, item));
-                    }
+                } else {
+                    remaining_dirty_items = dirty_items;
                 }
 
                 if !remaining_dirty_items.is_empty() {
@@ -11473,7 +11500,7 @@ mod tests {
     }
 
     #[gpui::test]
-    async fn test_close_window_with_serializable_items(cx: &mut TestAppContext) {
+    async fn test_close_window_with_worktrees_hot_exits(cx: &mut TestAppContext) {
         init_test(cx);
 
         // Register TestItem as a serializable item
@@ -11510,8 +11537,163 @@ mod tests {
         assert!(task.await.unwrap());
     }
 
+    // See https://github.com/zed-industries/zed/issues/55726.
+    //
+    // macOS only: on Linux/Windows, closing the last window sets
+    // `save_last_workspace`, which preserves the session (same as `Quit`),
+    // so hot-exit is safe there.
+    #[cfg(target_os = "macos")]
     #[gpui::test]
-    async fn test_close_window_with_failing_serialization(cx: &mut TestAppContext) {
+    async fn test_close_window_without_worktrees_prompts(cx: &mut TestAppContext) {
+        init_test(cx);
+
+        cx.update(|cx| {
+            register_serializable_item::<TestItem>(cx);
+        });
+
+        let fs = FakeFs::new(cx.executor());
+        let project = Project::test(fs, None, cx).await;
+        let (workspace, cx) =
+            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
+
+        let item = cx.new(|cx| {
+            TestItem::new(cx)
+                .with_dirty(true)
+                .with_serialize(|| Some(Task::ready(Ok(()))))
+        });
+        workspace.update_in(cx, |w, window, cx| {
+            w.add_item_to_active_pane(Box::new(item.clone()), None, true, window, cx);
+        });
+
+        let task = workspace.update_in(cx, |w, window, cx| {
+            w.prepare_to_close(CloseIntent::CloseWindow, window, cx)
+        });
+        cx.executor().run_until_parked();
+
+        assert!(
+            cx.has_pending_prompt(),
+            "closing a no-folder workspace with a dirty serializable item should prompt, \
+             since the workspace will not be reachable after close"
+        );
+        cx.simulate_prompt_answer("Don't Save");
+        cx.executor().run_until_parked();
+
+        assert!(task.await.unwrap());
+    }
+
+    #[gpui::test]
+    async fn test_quit_without_worktrees_hot_exits(cx: &mut TestAppContext) {
+        init_test(cx);
+
+        cx.update(|cx| {
+            register_serializable_item::<TestItem>(cx);
+        });
+
+        let fs = FakeFs::new(cx.executor());
+        let project = Project::test(fs, None, cx).await;
+        let (workspace, cx) =
+            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
+
+        let item = cx.new(|cx| {
+            TestItem::new(cx)
+                .with_dirty(true)
+                .with_serialize(|| Some(Task::ready(Ok(()))))
+        });
+        workspace.update_in(cx, |w, window, cx| {
+            w.add_item_to_active_pane(Box::new(item.clone()), None, true, window, cx);
+        });
+
+        let task = workspace.update_in(cx, |w, window, cx| {
+            w.prepare_to_close(CloseIntent::Quit, window, cx)
+        });
+        cx.executor().run_until_parked();
+
+        assert!(
+            !cx.has_pending_prompt(),
+            "quitting should hot-exit silently; the session restore on next \
+             launch will bring the dirty buffer back"
+        );
+        assert!(task.await.unwrap());
+    }
+
+    // See https://github.com/zed-industries/zed/issues/55726.
+    #[gpui::test]
+    async fn test_replace_window_without_worktrees_prompts(cx: &mut TestAppContext) {
+        init_test(cx);
+
+        cx.update(|cx| {
+            register_serializable_item::<TestItem>(cx);
+        });
+
+        let fs = FakeFs::new(cx.executor());
+        let project = Project::test(fs, None, cx).await;
+        let (workspace, cx) =
+            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
+
+        let item = cx.new(|cx| {
+            TestItem::new(cx)
+                .with_dirty(true)
+                .with_serialize(|| Some(Task::ready(Ok(()))))
+        });
+        workspace.update_in(cx, |w, window, cx| {
+            w.add_item_to_active_pane(Box::new(item.clone()), None, true, window, cx);
+        });
+
+        let task = workspace.update_in(cx, |w, window, cx| {
+            w.prepare_to_close(CloseIntent::ReplaceWindow, window, cx)
+        });
+        cx.executor().run_until_parked();
+
+        assert!(
+            cx.has_pending_prompt(),
+            "replacing a workspace with a dirty serializable item should prompt, \
+             since the workspace will be detached afterwards"
+        );
+        cx.simulate_prompt_answer("Don't Save");
+        cx.executor().run_until_parked();
+
+        assert!(task.await.unwrap());
+    }
+
+    #[gpui::test]
+    async fn test_replace_window_with_worktrees_hot_exits(cx: &mut TestAppContext) {
+        init_test(cx);
+
+        cx.update(|cx| {
+            register_serializable_item::<TestItem>(cx);
+        });
+
+        let fs = FakeFs::new(cx.executor());
+        fs.insert_tree("/root", json!({ "one": "" })).await;
+
+        let project = Project::test(fs, ["root".as_ref()], cx).await;
+        let (workspace, cx) =
+            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
+
+        let item = cx.new(|cx| {
+            TestItem::new(cx)
+                .with_dirty(true)
+                .with_serialize(|| Some(Task::ready(Ok(()))))
+        });
+        workspace.update_in(cx, |w, window, cx| {
+            w.add_item_to_active_pane(Box::new(item.clone()), None, true, window, cx);
+        });
+
+        let task = workspace.update_in(cx, |w, window, cx| {
+            w.prepare_to_close(CloseIntent::ReplaceWindow, window, cx)
+        });
+        cx.executor().run_until_parked();
+
+        assert!(
+            !cx.has_pending_prompt(),
+            "replacing a workspace with folder paths should hot-exit silently; \
+             the buffer is recoverable by reopening the project"
+        );
+        assert!(task.await.unwrap());
+    }
+
+    #[gpui::test]
+    async fn test_close_window_with_failing_serialize_prompts(cx: &mut TestAppContext) {
         init_test(cx);
 
         cx.update(|cx| {

crates/zed/Cargo.toml

@@ -2,7 +2,7 @@
 description = "The fast, collaborative code editor."
 edition.workspace = true
 name = "zed"
-version = "1.2.0"
+version = "1.3.0"
 publish.workspace = true
 license = "GPL-3.0-or-later"
 authors = ["Zed Team <hi@zed.dev>"]

crates/zed/src/main.rs

@@ -4,6 +4,16 @@
 mod reliability;
 mod zed;
 
+// Ensure the binary name stays in sync with APP_NAME so that the paths used
+// at runtime (data dir, config dir, etc.) match what the binary is called.
+const _: () = assert!(
+    paths::APP_NAME_LOWERCASE
+        .as_bytes()
+        .eq_ignore_ascii_case(env!("CARGO_BIN_NAME").as_bytes()),
+    "paths::APP_NAME_LOWERCASE must match the binary name. \
+     Forks: update APP_NAME in crates/paths/src/paths.rs when renaming the binary.",
+);
+
 use agent::{SharedThread, ThreadStore};
 use agent_client_protocol::schema as acp;
 use agent_ui::AgentPanel;