setup-pre-commit

# 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