Field report: impeccable SaaS-ified a developer docs page; the Opus
galleries showed the same on an album page. Root cause: two registers
force every surface into persuade-or-operate grammar. The register
section now names the visitor's mode first (Persuade / Operate / Read /
Experience) with mode-borrowing called out as the canonical failure,
and PRODUCT.md's register field maps as family (brand = Persuade +
Experience, product = Operate + Read) for compatibility. Read mode:
comprehension deliverable, navigable structure, chrome out of the way.
Experience mode: the artifact leads at every screen size.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Paul's Opus gallery observation: every impeccable 05-experimental-album
generation reads decidedly SaaS while frontend-design's open with the
art itself, especially at narrow viewports. Cause: the brand register
prescribed stop-the-scroll/earn-the-click/convert for ALL brand
surfaces. Split the register's deliverable by surface: product/service
pages convert; cultural surfaces (album, portfolio, publication, body
of work) lead with the artifact, recede the interface, and treat
conversion grammar as a category error — the visitor meets the work in
the first viewport at every screen size.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Paul: everything should be bold, nothing bland; bold is neither
decoration nor clutter but commitment to the concept, whose form the
concept chooses (maximal or severely clean, drenched or monochrome,
piercing copy, the product demonstrating itself). Replaces the
'spend your boldness in one place' rule imported from frontend-design,
whose one-bold-element-on-a-quiet-page framing pulled pages toward the
tasteful softness the galleries showed losing. The signature becomes
where the concept peaks rather than the only place it lives.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Paul's spot-check of the Fable validation galleries: frontend-design's
lektor generations read vastly more distinctive and subject-faithful
despite losing the overall pairwise verdict on craft. The arena agrees
on the axis (distinctiveness 8-31 at n=5). Two additions to the core:
the opening viewport is a thesis (open with the most characteristic
thing in the subject's world, with a concrete memory test), and an
explicit polish-is-the-floor counterweight so the craft floor stops
reading as a mandate for quiet.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Eval evidence showed the per-edit PostToolUse stream fires overwhelmingly
on copy-level rules (em-dash-overuse ~97x/session) and measurably makes
models more conservative, while a full-detector pass at completion is what
actually fixes contrast/padding/glow. Split the hook accordingly:
- Per-edit (PostToolUse) now surfaces only IMMEDIATE_TIER_RULES: broken
output (broken-image, text-overflow, clipped-overflow-container,
body-text-viewport-edge), objective contrast/legibility failures
(low-contrast, gray-on-color, tiny-text), single-property mechanical
slop (gradient-text, dark-glow), and design-system drift (the four
design-system-* rules, which compound if left uncorrected). Everything
else defers. Override with hook.perEditRules: "all" in
.impeccable/config.json. Tiering is off for Cursor/Copilot harnesses,
which have no Stop pass wired, so nothing gets silently dropped there.
- Stop deep pass (runStopHook): runs the FULL rule set over every UI file
touched this session (tracked via the existing hook.cache.json session
state; deferred-only edits now mark the file touched), dedupes against
everything already surfaced per-edit, honors ignore-rule/file/value and
inline disables, reuses the [impeccable@1] envelope, and no-ops fast
when no UI files were touched. Emits hookSpecificOutput
{ hookEventName: "Stop", additionalContext } per the Claude Code SDK
Stop contract (conversation continues so the model can act on it).
Second Stop fire is silent - deep-pass findings are remembered.
- Wiring: Stop entries (timeout 30) in plugin/hooks/hooks.json, the
.claude settings + .codex hooks manifests (transformers + hook-admin
repair path). Claude Code and Codex both dispatch a native Stop event;
Cursor's stop hook is inconsistently dispatched (pre-write gate stays)
and Copilot's agentStop/sessionEnd don't inject model context, so
neither gets a Stop entry - documented in reference/hooks.md.
- Tests: tiering split/override/harness gating, Stop dedupe + silent
no-touched-files + ignore machinery + kill switches; existing per-edit
tests moved to immediate-tier rule ids. 181 tests green; smoke-tested
the built dist skill end to end (glow surfaced per-edit, em-dash only
at Stop, second Stop silent).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Pairwise evals on Fable one-shot (6-task regression set, opus-4-8 judge,
position-bias-cancelled): the hand-distilled ~55-line lean core beat the
heavy v4 core 66% overall / 67% craft head-to-head, and moved the
decisive win-rate vs frontend-design from 13% to 27% (40% with the
completion-time QA scan; craft went positive 6-5 for the first time).
18/18 lean samples ran context.mjs + palette.mjs vs a minority under the
heavy core: shorter instructions get followed. Context weight itself was
suppressing both compliance and boldness.
Structure: persona + brief-wins + existing-worlds + subject-grounding +
plan/self-check + boldness + prove-don't-claim + commit + calibration +
compressed craft floor + two-paragraph registers. Commands table kept;
the no-arg context-aware menu logic moved to reference/routing.md (read
on demand in the only case that is inherently interactive). Provider
blocks and rule anchors preserved.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Judge rationales across cand-v4a2 arenas: competitor wins by showing
the product working (mix panels, comparison tables, live demos) and by
signatures big enough to organize the page; our samples claim, decorate,
and sometimes stop at the hero.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Eval evidence (cand-v4a1-prose): palette.mjs handed a random violet seed
to the Polish-TV lektor brief and the model anchored on it, overriding
subject-grounding; craft/shape user gates can't fire in one-shot runs
and each model improvises around them. Seed is now a reflex-check that
yields to a subject-dictated palette; craft/shape gain an explicit
unattended mode (same bar, no waiting); init interview is skipped when
no user can respond.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Per Paul's guidance: (1) existing committed design systems are the
bread-and-butter case and get a first-class core rule (work inside the
world, no parallel colors/fonts/styles, no perf regressions); (2) a
redesign that discards the current look is new identity work and runs
the full concept/tokens/signature process instead of anchoring to the
incumbent skeleton (the lektor failure); (3) the reflex-reject font list
and physical-object font procedure are brand-register rules, moved out
of the universal Commit section — system stacks and workhorse UI faces
are legitimate, often correct, for product UI, stated positively in the
product register.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
One-shot evals on Fable 5 (impeccable-evals notes/fable-oneshot-craft-plan.md)
showed the reference-file architecture failing: models skip the register
reads, so most design guidance never reaches them, and skill-on collapses
toward bare-model output (0/9 pairwise wins vs frontend-design on r10).
SKILL.md is now self-contained for one-shot work: persona, the-brief-wins
rule, ground-it-in-the-subject, a plan/tokens/signature/self-check process
gate, commitment guidance, a compact inline craft floor, and distilled
brand/product registers. Reference files remain as sub-command flows and
optional depth. The enumerated absolute-bans list is retired from prose;
mechanical slop enforcement moves to the detector/hook.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
* Add OpenAI plugin submission bundle
Build a Codex-native OpenAI plugin with bundled hooks, public listing metadata, submission guidance, privacy coverage, and regression tests.
AI assistance: OpenAI Codex prepared and validated these changes under maintainer direction.
* Fix provider script command rendering
Replace heuristic rewrites across executable scripts with one explicit provider marker, render pinned shortcuts per target harness, and remove the personal email from the public publisher manifest.
Addresses automated review feedback on PR #363.
AI assistance: OpenAI Codex prepared and validated these changes under maintainer direction.
Lower the CLI engine floor to Node 22.12 so npx no longer falls back to stale 2.x releases for Node 22/23 users.
Add Node 22.12 CI coverage while preserving the stable required test check, and document the 3.2.1 CLI release notes including the detector and installer fixes already waiting on main.
AI-assisted-by: Codex
Codex loads bundled plugin lifecycle hooks from `hooks/hooks.json` using a
strict schema that accepts only the top-level `hooks` field. The
plugin-packaged manifest carried a top-level `description`, so Codex rejected
the whole manifest with `unknown field description, expected hooks` and the
post-edit design detector never registered (issue #330).
Drop `description` from `buildClaudePluginHooksManifest()` and regenerate
`plugin/hooks/hooks.json`. The Claude Code plugin path is unaffected (it only
reads the `hooks` object). Add a regression assertion for the plugin artifact
and bump the skill version to 3.9.1.
Claude-Session: https://claude.ai/code/session_013GTTHY6uHwESUyAgjUEm7x
Co-authored-by: Claude <noreply@anthropic.com>
* Point DESIGN.md spec links at the open-source GitHub spec.
The Stitch docs site is client-rendered and unreliable for agent fetch; the
google-labs-code/design.md repo tracks the latest machine-readable spec.
Co-authored-by: Cursor <cursoragent@cursor.com>
* Sync plugin and harness copies after DESIGN.md spec link update.
build:release copies skill/reference into plugin/ and all harness dirs, so
refresh those generated outputs here instead of leaving plugin/ stale.
Co-authored-by: Cursor <cursoragent@cursor.com>
* Use raw GitHub URL for DESIGN.md spec in agent-facing refs.
The blob URL serves HTML; raw.githubusercontent.com returns plain markdown
that agents can fetch directly.
Co-authored-by: Cursor <cursoragent@cursor.com>
---------
Co-authored-by: Cursor <cursoragent@cursor.com>
* Add GitHub Copilot hook support (CLI + cloud agent)
Wire the Impeccable design detector into GitHub Copilot's hook system so
direct file edits get the same post-edit design feedback the Claude Code,
Codex, and Cursor harnesses already receive.
GitHub Copilot's contract differs from the existing harnesses (verified
against Copilot CLI 1.0.63):
- Repo-level manifest at `.github/hooks/impeccable.json` (read by both the
CLI, once committed to the default branch, and the cloud/app agent).
- Flat `postToolUse` entries with `bash`/`timeoutSec` and a full-match
`matcher` regex; the file-editing tools are `edit` and `create`.
- The stdin event uses camelCase `toolName`/`toolArgs`, where `toolArgs` is
a JSON *string* carrying the touched file under `path`.
- Context is injected via a top-level `additionalContext` string.
Changes:
- hooks.js: buildGitHubHooksManifest() + route `github` in hooksJsonFor().
- providers.js: emitHooks/hooksManifestRel for the github provider.
- hook-lib.mjs: detect the github harness, normalize the camelCase event
(parse the JSON-string toolArgs -> tool_input.file_path), and emit the
`additionalContext` payload shape.
- hook-admin.mjs / skills.mjs: install + idempotent-repair the
`.github/hooks/impeccable.json` manifest (bash-aware marker stripping).
- hooks.md: document GitHub Copilot as a supported harness.
- Tests for the builder, routing, event normalization, and end-to-end run.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
* Cover Copilot apply_patch edits in the hook (live-verified)
The first cut matched only `edit|create`, the tool names `copilot -p` uses.
A live trace against Copilot CLI 1.0.63 in an interactive session showed it
edits files via `apply_patch`, whose toolArgs is a raw OpenAI-format patch
string (`*** Begin Patch` / `*** Add File:`), not JSON. With the narrow
matcher the hook command never ran.
- hooks.js / hook-admin.mjs: matcher -> `edit|create|apply_patch`.
- hook-lib.mjs: normalizeGitHubEvent now routes apply_patch's raw patch
string into tool_input.command (reusing the existing parseApplyPatchPaths /
resolveTargetFiles plumbing) and only JSON-parses toolArgs for the
edit/create/view tools. tool_name is normalized to apply_patch so the patch
path is extracted even if a future build relabels the tool.
- Tests: apply_patch matcher assertions, event normalization, and an
end-to-end runHook covering the interactive/cloud path.
Verified live: a trusted interactive `apply_patch` edit fires the hook and
returns the expected `additionalContext` design reminder.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
* Address review feedback + add changelog entry
- hook-lib.mjs (Bugbot, low): looksLikeApplyPatch no longer misroutes an
edit/create event whose edited *content* contains apply_patch markers. A
real apply_patch payload is a raw string that does not parse as JSON; an
edit payload is a JSON object, so only non-JSON-object strings are treated
as apply_patch. Edit events keep extracting `path`. Adds a regression test.
- skills.mjs (Bugbot, medium): document why `.github` is intentionally
excluded from hookScriptPathForProvider. Its hook manifest is committed and
shared (read by the Copilot cloud agent and teammates), so the command must
stay portable via `$(git rev-parse ...)`; rewriting it to a machine-local
absolute path would break those. GitHub skills are project-scoped, so the
project-relative path resolves.
- changelog: add an Upcoming (v3.x placeholder) entry for the Copilot hook.
Version is not bumped yet (batching with other changes).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
---------
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
The bundled detector's cli/main.mjs imports ../../lib/impeccable-config.mjs,
which in the source CLI resolves to cli/lib/impeccable-config.mjs. The skill
build only copies cli/engine/** into scripts/detector/**, leaving that
dependency behind, so from the bundled scripts/detector/cli/main.mjs the same
import resolved to scripts/lib/impeccable-config.mjs and failed with
"Cannot find module .../lib/impeccable-config.mjs". /impeccable critique (and
any detector-backed command) crashed on startup for every provider since #252.
Teach the detector bundler to copy out-of-bundle engine dependencies into the
skill's scripts/lib/, and add a build test that walks every bundled script and
asserts each relative import resolves to another bundled file, so a future
out-of-bundle dependency fails the test instead of the user.
Skill v3.7.1 (patch). CLI unchanged — the engine resolves fine in the CLI's
own tree; only the skill bundling was wrong.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Paul BakausandClaude Fable 5
github-actions[bot]
dependabot[bot]andGitHub
