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Community / AGENT SKILL
setup-pre-commit
0
Set up Husky pre-commit hooks with lint-staged (Prettier), type checking, and tests in the current repo. Use when user wants to add pre-commit hooks, set up Husky, configure lint-staged, or add commit-time formatting/typechecking/testing.
Understand the trade-offs.
SKILL QUALITY
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The full skill.
Original instructions from the publisher’s SKILL.md
# Setup Pre-Commit Hooks
## What This Sets Up
- **Husky** pre-commit hook
- **lint-staged** running Prettier on all staged files
- **Prettier** config (if missing)
- **typecheck** and **test** scripts in the pre-commit hook
## Steps
### 1. Detect package manager
Check for `package-lock.json` (npm), `pnpm-lock.yaml` (pnpm), `yarn.lock` (yarn), `bun.lockb` (bun). Use whichever is present. Default to npm if unclear.
### 2. Install dependencies
Install as devDependencies:
```
husky lint-staged prettier
```
### 3. Initialize Husky
```bash
npx husky init
```
This creates `.husky/` dir and adds `prepare: "husky"` to package.json.
### 4. Create `.husky/pre-commit`
Write this file (no shebang needed for Husky v9+):
```
npx lint-staged
npm run typecheck
npm run test
```
**Adapt**: Replace `npm` with detected package manager. If repo has no `typecheck` or `test` script in package.json, omit those lines and tell the user.
### 5. Create `.lintstagedrc`
```json
{
"*": "prettier --ignore-unknown --write"
}
```
### 6. Create `.prettierrc` (if missing)
Only create if no Prettier config exists. Use these defaults:
```json
{
"useTabs": false,
"tabWidth": 2,
"printWidth": 80,
"singleQuote": false,
"trailingComma": "es5",
"semi": true,
"arrowParens": "always"
}
```
### 7. Verify
- [ ] `.husky/pre-commit` exists and is executable
- [ ] `.lintstagedrc` exists
- [ ] `prepare` script in package.json is `"husky"`
- [ ] `prettier` config exists
- [ ] Run `npx lint-staged` to verify it works
### 8. Commit
Stage all changed/created files and commit with message: `Add pre-commit hooks (husky + lint-staged + prettier)`
This will run through the new pre-commit hooks — a good smoke test that everything works.
## Notes
- Husky v9+ doesn't need shebangs in hook files
- `prettier --ignore-unknown` skips files Prettier can't parse (images, etc.)
- The pre-commit runs lint-staged first (fast, staged-only), then full typecheck and tests