Set up automated checks before each Git commit using Husky and lint-staged. Format staged files with Prettier, run existing type checks and tests, and verify the setup using the repository's package manager.
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.
Review the instructions the agent will receive before you install.
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.
Install as devDependencies:
husky lint-staged prettier
npx husky init
This creates .husky/ dir and adds prepare: "husky" to package.json.
.husky/pre-commitWrite 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.
.lintstagedrc{
"*": "prettier --ignore-unknown --write"
}
.prettierrc (if missing)Only create if no Prettier config exists. Use these defaults:
{
"useTabs": false,
"tabWidth": 2,
"printWidth": 80,
"singleQuote": false,
"trailingComma": "es5",
"semi": true,
"arrowParens": "always"
}
.husky/pre-commit exists and is executable.lintstagedrc existsprepare script in package.json is "husky"prettier config existsnpx lint-staged to verify it worksStage 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.
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