Install

noomoo needs Node.js 20 or newer and git. Install the package in the project you want it to watch, with the package manager the project already uses:

npm install -D noomoo
pnpm add -D noomoo
yarn add -D noomoo # yarn 1.x (classic)
yarn add -D noomoo # yarn berry (2 and newer), node_modules or Plug'n'Play

noomoo picks the manager from the packageManager field in package.json, then from the lock file, and falls back to npm. Git hooks, the CI check and the plugin run noomoo the way that manager does. With yarn Plug'n'Play there is no node_modules directory, so npx does not find the package: noomoo runs through yarn exec -- noomoo.

The full walk-through, including the Claude Code plugin and how to roll the setup back, is on the install page.