**closest‑package** is a tiny Node.js utility that walks up the directory tree from a given start folder until it finds a `package.json` file that satisfies an optional filter callback (e.g., matching a specific package name). It offers both asynchronous (`closest(dir, filter, cb)`) and synchronous (`closest.sync(dir, filter)`) APIs, making it handy for scripts or tools that need to locate the nearest relevant `package.json` in a project hierarchy.