1# $impeccable hooks
2 
3Manage the **design detector hook** for the current project.
4 
5The hook runs the impeccable design detector on direct file edits to design-relevant files (`.tsx`, `.jsx`, `.html`, `.vue`, `.svelte`, `.astro`, `.css`, `.scss`, `.sass`, `.less`, `.ts`, `.js`). Claude Code, Codex, and GitHub Copilot use a post-tool-use hook and push a short system reminder into the agent's context after the edit; findings get a correction prompt, pending issues get a re-nudge, and clean UI-ish files get a short ack unless quiet mode is on (`hook.quiet` in config). Plain `.ts` and `.js` files are still scanned, but stay quiet unless the detector finds something. Cursor uses `preToolUse` to block bad proposed writes before they land and stays silent when it allows a clean write.
6 
7This command toggles the hook **per project** by editing `.impeccable/config.json` (the unified Impeccable config; hook runtime settings live under its `hook` key, and shared detector ignores live under `detector`). Per-developer overrides, including the install consent decision (`hook.consent`) the CLI records, live in the gitignored `.impeccable/config.local.json`. Set `hook.enabled: false` to turn the hook off, `hook.quiet: true` to silence the clean/pending acks, or `hook.auditLog` to a file path for an NDJSON log. The legacy `IMPECCABLE_HOOK_DISABLED`, `IMPECCABLE_HOOK_QUIET`, and `IMPECCABLE_HOOK_LOG` env vars are still honored and override these config values when set.
8 
9Manual `npx impeccable detect` scans use the same project filter config by default: `detector.ignoreRules`, `detector.ignoreFiles`, `detector.ignoreValues`, and `detector.designSystem.enabled`. `hook.enabled` only controls automatic hook execution, not manual CLI scans. Use `npx impeccable detect --no-config ...` for a raw detector run that ignores project config/context. Use `npx impeccable ignores ...` for direct CLI CRUD on the same detector ignores.
10 
11Supported harnesses: Claude Code (`.claude/settings.local.json` in the project, which is gitignored so the hook stays machine-local; a hook you move into the shared `settings.json` is honored in place too), Codex (`.codex/hooks.json` in the project), Cursor (`.cursor/hooks.json` in the project), and GitHub Copilot (`.github/hooks$impeccable.json` in the project, a team-shared committed file that both the Copilot CLI and the cloud agent read). For the Copilot CLI, repo-level hooks fire once `.github/hooks$impeccable.json` is committed to the repository's default branch.
12 
13On **Cursor**, `preToolUse` checks proposed Write/Edit/Shell write content and denies only when the real detector finds an issue. The denial message is visible to the agent as the tool error, so the agent can reconsider before the bad write lands.
14 
15## Routing
16 
17The first argument is the action. Defaults to `status`.
18 
19| Action | What it does |
20|---|---|
21| `status` | Print current state, shared/local config paths, ignored rules / files / values, env override. |
22| `on` | Set `enabled: true` in `.impeccable/config.json`, record local hook consent as accepted, and install/repair provider hook manifests when the skill is installed. |
23| `off` | Set `enabled: false` in `.impeccable/config.json`. |
24| `ignore-rule <id>` | Append `<id>` to `detector.ignoreRules`; for `overused-font`, requires `--all-values`. |
25| `ignore-file <glob>` | Append `<glob>` to `detector.ignoreFiles`. |
26| `ignore-value <id> <value> [--shared] [--reason "..."]` | Append a rule/value suppression to shared `.impeccable/config.json`. |
27| `ignore-value <id> <value> --local [--reason "..."]` | Append a private rule/value suppression to `.impeccable/config.local.json`. |
28| `reset` | Delete the project config, dedup cache, and Cursor pending queue. |
29 
30## Flow
31 
321. Resolve the action from the user's argument. If no action was given, default to `status`.
332. Invoke the admin script and pass the user's output through verbatim:
34 
35   ```bash
36   node .agents/skills/impeccable/scripts/hook-admin.mjs <action> [args...]
37   ```
38 
393. If `<action>` is `off`, follow up with a one-line note: "Done. New edits will not trigger the design hook in this project until you run `$impeccable hooks on`."
404. If `<action>` is `on`, follow up with: "Done. The design hook will fire after the next Edit/Write/MultiEdit on a UI file."
415. If `<action>` is `ignore-value`, `ignore-file`, or `ignore-rule`, just print the script output. The default scope is shared `.impeccable/config.json`; add `--local` only when the user explicitly asks for a private exception.
426. If `<action>` is `status`, just print the script output. Do not add commentary unless the user asked a follow-up question.
43 
44## Intentional findings
45 
46The hook itself never writes ignore config. Persist an exception only after the user explicitly confirms the flagged issue is intentional, and always go through `hook-admin.mjs`.
47 
48Prefer the narrowest exception:
49 
50- If the finding line shows an exact `ignore-value` command, run that command. This writes shared `.impeccable/config.json` by default.
51- For value-specific findings such as `overused-font` and `bounce-easing`, use `ignore-value` when the user confirms the specific value. Do not use `ignore-rule overused-font` for a specific font.
52- If the finding has no value-specific command, such as `side-tab`, prefer `ignore-file <path>` for the current file.
53- Use `ignore-rule <id>` only when the user asks to suppress that whole rule across the project. For broad overused-font suppression, use `ignore-rule overused-font --all-values` only when the user asks to ignore overused fonts generally.
54- Prefer config ignores (the commands above) by default; they keep suppressions in one reviewable place. Reach for an inline comment only when the waiver must travel with a single file that leaves the repo (a generated/exported standalone document, an emailed HTML file). The supported marker is `impeccable-disable <rule>` (whole file) or `impeccable-disable-line` / `impeccable-disable-next-line` (one line), in any comment syntax, with an optional reason after `:` or `--`. The detector honors it by default; `--no-inline-ignores` or `--no-config` bypasses it.
55 
56Example value-specific exception:
57 
58```bash
59node .agents/skills/impeccable/scripts/hook-admin.mjs ignore-value overused-font Inter --shared --reason "User confirmed Inter is intentional"
60```
61 
62Example intentional motion exception:
63 
64```bash
65node .agents/skills/impeccable/scripts/hook-admin.mjs ignore-value bounce-easing bounce-ball --shared --reason "User confirmed ball bounce animation is intentional"
66```
67 
68Example whole-rule font exception:
69 
70```bash
71node .agents/skills/impeccable/scripts/hook-admin.mjs ignore-rule overused-font --all-values --reason "User asked to ignore overused fonts generally"
72```
73 
74Example file-scoped exception:
75 
76```bash
77node .agents/skills/impeccable/scripts/hook-admin.mjs ignore-file "src/legacy/Card.tsx"
78```
79 
80## Constraints
81 
82- Never modify `.impeccable/config.json` or `.impeccable/config.local.json` by hand from this command. Always go through `hook-admin.mjs` so writes stay validated and the file shape stays consistent.
83- Do not edit the hook scripts themselves (`hook.mjs`, `hook-lib.mjs`, `hook-before-edit.mjs`) from this flow. Those are skill plumbing.
84- Cursor can block a proposed write when the detector finds a real issue. Claude Code, Codex, and GitHub Copilot do not block the edit; they emit a post-edit reminder instead. Disabling stops both blocking and reminders.
85- The hook is bundled with the Impeccable skill and installed through project-local manifests: `.claude/settings.local.json`, `.codex/hooks.json`, `.cursor/hooks.json`, and `.github/hooks$impeccable.json`. On Codex, the user must approve the hook via `/hooks` the first time. On Cursor, confirm hooks are enabled under Settings -> Hooks. On GitHub Copilot, the CLI loads `.github/hooks$impeccable.json` once it is committed to the repository's default branch, and the cloud agent reads it from the repo directly.
86 
87## Failure modes
88 
89- If `.impeccable/config.json` or `.impeccable/config.local.json` is unreadable or malformed, the hook ignores that file and uses the remaining valid config/defaults. `hook-admin.mjs status` will show malformed files as ignored.
90- If the user asks to "disable the hook" globally, lead with `$impeccable hooks off` (persistent for this project; writes `hook.enabled: false` to config). The legacy `IMPECCABLE_HOOK_DISABLED=1` env var also works as a one-shot override that follows the shell.
91