**install-self-peers** is a command‑line tool that scans a library’s `package.json` and automatically adds any missing peer dependencies as regular dependencies, simplifying local development of packages (e.g., React component libraries). It can be run manually or hooked into a project’s lifecycle scripts (e.g., via a `prepare` script) and supports both npm and Yarn, making it useful for library authors who need to keep peer dependencies in sync while developing.