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* feat(craft): add brand-agnostic craft references and refero-derived lint rules Introduce `craft/` as a third top-level content axis alongside `skills/` and `design-systems/`, holding universal (brand-agnostic) craft rules that apply on top of any DESIGN.md. Skills opt in via a new `od.craft.requires` front-matter array; the daemon resolves the slug list and injects the matching files between DESIGN.md and the skill body in the system prompt. Initial vendor (MIT, adapted from referodesign/refero_skill): typography craft, color craft, anti-ai-slop. Pilot wired on saas-landing. Extend the existing lint-artifact pass with two refero-derived rules: - P0 ai-default-indigo — solid #6366f1 / #4f46e5 / #4338ca / #8b5cf6 as accent (not just gradients) is the most-reported AI tell. - P1 all-caps-no-tracking — `text-transform: uppercase` rules without ≥0.06em letter-spacing. The craft loader silently drops missing files so a skill can forward-reference future sections (e.g. `motion`) without breaking. * fix(daemon): skip :root token blocks in ai-default-indigo lint The ai-default-indigo P0 check scanned the whole HTML for the raw hex, so brands that intentionally encode indigo as `--accent: #6366f1` in :root and consume it via var(--accent) downstream were flagged as AI-default — a false positive that forced the agent to "fix" valid output. Strip :root token-definition blocks (including attribute-selector theme variants) before scanning, mirroring the existing pattern used by the raw-hex P1 check. Hex still flagged when it appears in component rules or inline styles. * docs(craft): address PR #225 P3 review feedback - craft/README.md: explain why missing craft sections are silently dropped (forward-compatibility) instead of surfacing a warning. - craft/typography.md: ground the 0.06em ALL CAPS tracking floor in Bringhurst-derived typographic practice rather than presenting the threshold as unattributed. - craft/color.md: cover the edge case where a brand's DESIGN.md intentionally encodes indigo as --accent — `var(--accent)` uses remain unflagged because the linter only inspects hardcoded hex. - docs/skills-protocol.md: link the "missing files dropped silently" note back to craft/README.md for the canonical slug list and the rationale behind the choice. * fix(craft): address PR #225 P0 review feedback - tools/pack: copy `craft/` into the packaged resource root alongside `skills`, `design-systems`, and `frames`, so the `od.craft.requires` integration isn't a silent no-op when the daemon resolves `${OD_RESOURCE_ROOT}/craft` in packaged builds. - packages/contracts: add `craftRequires?: string[]` to `SkillSummary` (and therefore `SkillDetail`) so the field that `listSkills()` already returns and `/api/skills(/:id)` already serializes via `...rest` is part of the documented web/daemon contract instead of leaking through as an untyped property. - apps/daemon/lint-artifact: expand the indigo token-strip pass to cover selector lists containing `:root` (e.g. `:root, [data-theme="light"]`) and any rule whose body is custom-property-only (e.g. a `[data-theme="dark"] { --accent: ... }` theme variant). Real component rules with a hardcoded indigo are still preserved so the P0 finding still fires; tests cover the new selector-list and theme-variant cases. * fix(craft): address PR #225 follow-up review feedback - lint-artifact: scope the indigo token-strip to <style> blocks so the rule-shaped regex no longer captures leading `<style>` text into the selector (which broke `:root` recognition for token blocks that mix `color-scheme`/etc. with `--accent`). Run the strip on the extracted CSS instead, with a regression covering `:root { color-scheme: light; --accent: #6366f1 }`. - lint-artifact: tighten the custom-property-only exemption to global theme-scope selectors (`:root`, `html`, `body`, bare attribute selectors like `[data-theme="dark"]`). Component-local rules such as `.cta { --cta-bg: #6366f1 }` are no longer exempted, so an agent cannot launder default indigo through a local var. Regression test added. - craft/anti-ai-slop.md: stop claiming every rule below is enforced by the linter; only several are. The unenforced rules (standard Hero→Features→Pricing→FAQ→CTA flow, decorative blob/wave SVG backgrounds, perfect symmetry) are now flagged inline as "(guidance, not auto-checked)" so the contract with the lint surface stays honest. * fix(daemon): tighten lint-artifact iteration and :root token gating - all-caps-no-tracking: iterate every <style> block. The previous check called `exec` once on a non-global regex, so an artifact whose offending uppercase rule sat in a second <style> block (e.g. a reset block followed by a components block) slipped past. Switch to `matchAll` and break across both loops once a violation is found. Regression test covers a second-block uppercase rule. - ai-default-indigo: stop unconditionally exempting any selector list containing `:root`. The exemption now requires both conditions to hold: every selector in the list is global theme scope AND the body is token-shaped (CSS custom properties or the `color-scheme` keyword). So `:root { background: #6366f1 }` and `:root, .cta { --cta-bg: #6366f1 }` no longer launder a hardcoded indigo through the strip pass. Regression tests cover both bypass shapes. * fix(daemon): scope theme-attr exemption and strip CSS comments in token blocks Address PR #225 review feedback on `ai-default-indigo`: - The bare-attribute branch of `selectorListIsGlobalThemeScope` accepted any `[attr=...]` selector, so a custom-property-only rule on a component/state attribute (e.g. `[data-variant="primary"]`, `[aria-current="page"]`) was treated as a global theme block and stripped before the indigo scan — exactly the component-local indigo laundering this lint is meant to catch. Restrict the exemption to a small allowlist of known theme switches: `data-theme`, `data-color-scheme`, `data-mode`. - `stripTokenBlocksFromCss` split rule bodies on `;` and matched each fragment from the start, so a token block whose body contained a normal CSS comment such as `:root { /* brand accent */ --accent: #6366f1; }` produced a fragment beginning with the comment, failed `isTokenShapedDeclaration`, and the rule was left in scope of the indigo scan — a false P0 on a legitimate token definition. Strip CSS comments before splitting/classifying declarations. Add regression coverage: arbitrary component/state attribute selectors still trip `ai-default-indigo`; `data-color-scheme` theme variants stay exempted; `:root` token blocks with leading, trailing, and between-declaration CSS comments are recognized. * fix(daemon): strip CSS comments and recognize tokens nested in at-rules The all-caps-no-tracking scan ran against raw `<style>` content, so a commented-out rule like `/* .eyebrow { text-transform: uppercase; } */` matched `upperRe` and emitted a P1 for CSS the browser ignores. Strip CSS comments from the style body before structural matching. `stripTokenBlocksFromCss` only matched flat `selector { body }` rules, so a media-query-wrapped token block like `@media (prefers-color-scheme: dark) { :root { --accent: #6366f1 } }` had its outer `@media` rule treated as the selector/body pair and the inner `:root` token block was never stripped, producing a P0 false positive on legitimate responsive theme CSS. Tighten the body alternation to `[^{}]*` so the regex matches innermost rules and recognizes the inner `:root` block directly while preserving the outer at-rule wrapper. * fix(daemon): align ai-default-indigo list with documented cardinal sins The lint's AI_DEFAULT_INDIGO subset omitted #3730a3 and #a855f7, which craft/anti-ai-slop.md lists as P0-blocked solid accents. An artifact could hard-code one of those documented colors as a button fill and slip past the indigo scan unless it happened to be inside a gradient. Bring the lint set to the exact list documented in the craft doc, and tighten the doc's wording from "etc." to an explicit enumeration that points at AI_DEFAULT_INDIGO so the prompt contract and daemon behavior stay in sync. Add regression tests pinning each newly-included hex. * fix(daemon): tighten theme-scope selector and scan inline ALL CAPS The theme-scope exemption used to accept any attribute on `:root`, `html`, or `body` (e.g. `:root[data-variant="primary"]`), letting an agent launder default indigo through a component/state attribute and slip past the `ai-default-indigo` lint. The prefixed branches now require the attribute name to be one of GLOBAL_THEME_ATTRIBUTES, matching the bare-attribute branch. The `all-caps-no-tracking` rule only iterated `<style>` blocks, so inline declarations like `<span style="text-transform: uppercase">` produced no finding even though craft/typography.md treats the ≥0.06em tracking floor as having no exceptions. Added a second scan over `style="..."` attributes that runs the same letter-spacing check and dedupes against the existing `<style>`-block finding so the agent gets a single corrective signal per artifact. * fix(daemon): align uppercase tracking px floor with the 0.06em rule The previous absolute fallback (>=1.5px) was stricter than the craft rule it enforces. `font-size: 12px; letter-spacing: 1px` is 0.083em — above the 0.06em floor — but 1.5px would reject it and trigger an unnecessary correction loop on compliant small-label CSS. Extract `hasAdequateUppercaseTracking`: read `font-size` from the same rule body and compare px tracking against `fontSize * 0.06`; fall back to a conservative >=1px floor when font-size is inherited (covers the default 16px body where 1px ≈ 0.0625em). Apply the helper to both the <style>-block scan and the inline-style scan, and add 12–14px label tests in both branches. * fix(daemon): treat rem letter-spacing as absolute, not per-element em `rem` was previously folded into the same branch as `em` and accepted at the 0.06 threshold. But `rem` is relative to the root font-size (16px default), not the element's own font-size, so on a 48px heading `letter-spacing: 0.06rem` resolves to 0.96px — about 0.02em of the element, well below the 0.06em rule the lint enforces. Convert rem to absolute px through the 16px root assumption and reuse the same px-vs-element-font-size resolution: same-rule `font-size: <n>px` gives an exact `n * 0.06` floor; otherwise the conservative >=1px fallback applies. Add regression tests for 48px headings with 0.06rem tracking (must flag) plus the 16px-element and rem-floor matches that must keep passing, in both <style>-block and inline-style branches. * fix(daemon): resolve var() refs in uppercase tracking lint `hasAdequateUppercaseTracking` only matched literal numeric values, so a tokenized rule like `letter-spacing: var(--caps-tracking)` — exactly the pattern the craft prompt steers artifacts toward — was falsely reported as `all-caps-no-tracking`. Extract `--name: value` declarations from global theme scopes (`:root`, `html`, theme-attribute selectors) once per artifact, then expand simple `var(--name)` (and `var(--name, fallback)`) references in the inspected rule body before applying the existing 0.06em / px-floor / rem-conversion logic. References without a matching token and no fallback stay in place, preserving the conservative "missing tracking" finding. * fix(daemon): resolve rem and var() font-size in uppercase tracking lint Previously the px-vs-element-font-size resolution only matched `font-size: <n>px`. Any rem-based or tokenized display size fell through to the lenient `>= 1px` body-text fallback, so an artifact emitting `.display { font-size: 3rem; text-transform: uppercase; letter-spacing: 1px; }` (a ~48px heading with a 2.88px floor) slipped past the lint that this helper exists to enforce. Resolve `rem` font-size via the same root-font assumption already used for tracking, and treat any explicitly declared but unresolvable unit (`em`, `%`, `calc(...)`, an unresolved `var(...)`) conservatively — refuse the lenient fallback so the rule must use either an `em` letter-spacing or a verifiable px/rem font-size. `var()` font-size declarations resolve through the existing `resolveCssVars` pass before the size scan runs, so the same fix catches the tokenized-display-size pattern (`--display-size: 3rem`). * fix(daemon): parse declarations to ignore custom-prop names in uppercase tracking lint The hasAdequateUppercaseTracking and resolveFontSizePx helpers used substring regexes against the rule body, so a token-name declaration such as `--letter-spacing: 0.08em` or `--display-font-size: 48px` could satisfy the `letter-spacing` / `font-size` checks even though it has no rendered effect — letting actual ALL-CAPS-without-tracking rules slip past the P1 lint. Parse the declaration list, compare exact property names, and skip declarations whose property starts with `--`. Adds regression tests covering token-name letter-spacing (style-block + inline) and a token-name font-size masking the bail-out branch. * fix(daemon): scope indigo token exemption to --accent only Previously stripTokenBlocksFromCss removed every custom-property-only global theme block before the ai-default-indigo scan, which let a laundered indigo token like `:root { --primary: #6366f1 }` consumed via `var(--primary)` slip past the lint. The craft contract is that the only escape hatch is encoding indigo as the design system's `--accent` token; any other token name is still the LLM-default color hidden behind an arbitrary name. Narrow the strip pass so a non-`--accent` token whose value carries an AI-default indigo hex keeps the rule in scope, and add regression tests for `--primary` / `--button-bg` global tokens feeding a CTA, including the at-rule and theme-attribute variants. * fix(daemon): model CSS cascade in tracking lint and detect blue→cyan trust gradients Address PR #225 review feedback (3 comments): - `letter-spacing` / `font-size` selection now picks the LAST matching declaration in the rule body, modeling CSS source-order cascade. `.eyebrow { letter-spacing: 0.08em; letter-spacing: 0.02em }` renders the noncompliant 0.02em the browser actually shows; the previous first-match behaviour silently passed it. - `extractCssTokens` now records every distinct value seen for a token across global theme scopes, and `hasAdequateUppercaseTracking` enumerates each combination so a default-theme value below the floor cannot be rescued by a scoped override that happened to be parsed later (`:root { --caps-tracking: 0.02em }` + `[data-theme="dark"] { --caps-tracking: 0.08em }` now fires). - New `trust-gradient` P0 rule pairs blue/sky tokens against cyan tokens in `linear-gradient(...)` bodies so `blue→cyan` two-stop trust gradients (documented as a cardinal sin in `craft/anti-ai-slop.md`) are actually enforced — both the hex form (`linear-gradient(90deg, #3b82f6, #06b6d4)`) and the keyword form (`linear-gradient(90deg, blue, cyan)`). Adds 11 regression tests covering each path (cascade override in <style> and inline form, font-size cascade shifting the floor, both orderings of the conflicting-token cascade, the don't-over-fire case when every theme value clears the floor, hex / keyword / sky variants of the trust gradient, and the don't-double-fire case when purple-gradient already caught a mixed gradient). * fix(daemon): apply per-scope cascade in extractCssTokens When the same CSS custom property is declared more than once inside a single rule body (e.g. `:root { --caps-tracking: 0.02em; --caps-tracking: 0.08em }`), CSS source-order cascade collapses to the last value; the earlier declaration never reaches any element. `extractCssTokens` was treating intra-scope duplicates as simultaneous theme alternatives, so `hasAdequateUppercaseTracking` enumerated the stale 0.02em and emitted a spurious all-caps-no-tracking finding. Collapse duplicate token declarations within a rule body to the last value before merging into the cross-scope distinct-value map. Cross-scope overrides (separate `:root` and `[data-theme]` rules) remain preserved as distinct values so the conservative theme-cascade check still fires when ANY applicable theme renders below the floor. * fix(daemon): scope tracking lint to innermost rules and per-theme tokens Restrict the upperRe body alternation to [^{}]* so the regex matches innermost CSS rules and skips at-rule wrappers — an outer @media or @supports could otherwise capture as a single rule whose selector was the at-rule and whose body began with the inner selector token, masking the same-rule font-size and letting noncompliant tracking on large headings slip through the lenient inherited-size fallback. Replace the by-name-distinct-values token map with per-scope token records and a buildResolvedThemes pass that materializes one effective map per theme. Paired token declarations now stay paired during evaluation, so theme variants like :root + [data-theme=dark] no longer generate cross-theme cartesian pairings (e.g. default-size + dark-track) that emit false positives on legitimate light/dark themes. --------- Co-authored-by: looper <looper@open-claude.dev>
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Typography craft rules
Universal typography rules that apply on top of any DESIGN.md. The
active design system decides which fonts; this file decides how they
behave at every size.
Adapted from refero_skill (MIT) — distilled and re-tuned for Open Design's token system.
Type scale
Use a multiplicative scale (1.2 or 1.25). Cap at 6–8 sizes per artifact.
| Role | Range |
|---|---|
| Display | 48–72 px |
| H1 | 32–48 px |
| H2 | 24–32 px |
| H3 | 20–24 px |
| Body | 15–18 px |
| Small | 13–14 px |
| Caption | 11–12 px |
Line height (leading)
| Text size | Line height |
|---|---|
| Display / H1 (≥32 px) | 1.0–1.2 (tight) |
| Body (15–18 px) | 1.5–1.6 |
| Small (≤14 px) | 1.5 |
Letter-spacing — the rule that makes or breaks craft
This is the single most-skipped rule in AI-generated design. No exceptions.
| Context | Letter-spacing |
|---|---|
| Body text (14–18 px) | 0 (default) |
| Small text (11–13 px) | 0.01em to 0.02em (positive) |
| UI labels and button text | 0.02em |
| ALL CAPS | 0.06em to 0.1em (required) |
| Headings 32 px+ | -0.01em to -0.02em |
| Display 48 px+ | -0.02em to -0.03em |
ALL CAPS without positive tracking looks cramped and amateur. Display text without negative tracking looks loose and weak. These two failures are the most reliable AI-slop tells.
The 0.06em floor is not arbitrary: it is the empirical lower bound
that print and web typographers have converged on for uppercase
tracking (cf. Bringhurst's Elements of Typographic Style §3.2.7,
which recommends 5–10% of the em for caps; modern screen practice
rounds the lower end to 0.06em). Anything tighter and the counters
collide on screen; the upper bound 0.1em keeps the word from
disintegrating into letters.
Font pairing
- Maximum 2 typefaces per artifact (display + body, or one variable face used at multiple weights).
- Always declare a system fallback chain. If the active
DESIGN.mdships a webfont URL, the fallback must still produce a coherent look. - Never set
font-family: system-uialone on a heading — that is the textbook AI default; always pair it with an intentional first choice.
Line length
Limit body copy to 50–75 characters per line. In CSS:
max-width: 65ch is a safe default.
Three-weight system
Most well-crafted UIs use exactly 3 weights:
- Read (400 / 450) — body copy
- Emphasize (510 / 550) — UI text, labels, navigation
- Announce (590 / 600) — headlines, buttons
Weight 700+ is rarely needed. If your design uses bold for "emphasis on emphasis," it likely lacks weight discipline elsewhere.
Common mistakes (lint these)
- ALL CAPS without
letter-spacing≥0.06em. - Display text (≥32 px) without negative tracking.
- More than 3 type sizes visible above the fold.
- Mixed serif and slab on the same screen without a clear role split.
- Body copy in
text-align: justify(creates rivers; never use on the web).