**check-package-dependencies** is a Node.js utility (available as an npm package and CLI) that validates a project’s `package.json` for common dependency pitfalls—duplicate versions, unmet or mis‑specified peer dependencies, mismatched resolutions, and non‑exact version ranges. It’s aimed at JavaScript/TypeScript developers and CI pipelines (including monorepos with workspaces) who want automated checks to keep their dependency graph clean and safe before merges.