yarnpkg/yarn

Yarn is a package manager for JavaScript that provides fast, reliable, and secure dependency management as an alternative to npm.

Yarn addresses the challenges of managing JavaScript dependencies by implementing package caching to eliminate redundant downloads, using a lockfile format that ensures deterministic installations across different machines, and verifying package integrity through checksums before execution. The tool maximizes performance through concurrent operations and efficient network request queuing, while also providing resilience by automatically retrying failed requests so that a single network failure does not halt the entire installation process.

Developers should be aware that this repository maintains the 1.x line, which is frozen for new features. The maintainers strongly recommend migrating to the latest release available in the separate yarnpkg/berry repository, where active development continues and many classes of problems have been addressed. The newer releases offer additional flexibility through the nodeLinker setting, allowing developers to choose between node_modules-style installation like npm, symlinks like pnpm, or Yarn's PnP manifest approach. This repository is kept primarily for historical purposes and occasional hotfixes to ease migration from 1.x to later versions.

The project maintains continuous integration across multiple platforms and demonstrates active engagement with its community through Discord channels. Development follows structured commit practices aligned with conventional commit standards.