add-dependency

To add an npm package to a Yarn 4 project, use the yarn add command with the package name. This ensures the correct package manager is used and updates package.json with the new dependency automatically.

Yes, you can install TypeScript type declarations when adding a dependency. The process identifies and installs the necessary type packages alongside the core library to maintain proper type safety.

The best way to manage dev dependencies in a Yarn 4 workflow is using the yarn add command configured for development packages. This correctly categorizes testing or build tools separately from production libraries in package.json.

Adding a core library with Yarn 4 suggests documentation updates when needed. If the new package represents a core stack change, the workflow prompts you to update project documentation or setup notes to prevent tooling drift.

You should verify package.json after running yarn add to confirm the package was successfully registered. This validation step ensures the dependency appears correctly before you start importing it into your application code.