Yarn

Judgement

What it is

Developer tool

What it does

The current Yarn JavaScript package manager, with workspaces, plugins, a portable shell for scripts and an optional Plug'n'Play mode that removes node_modules.

Adopt it when

Your monorepo already uses modern Yarn or you want its constraints and plugin features.

Watch out

Plug'n'Play breaks some tools, and most new projects now pick pnpm or Bun instead.

Ready for

Production-ready

Runs as

Command line

Built with

TypeScript and Node.js

How established

Established: started 8 years ago, latest release @yarnpkg/cli/4.18.1.

What the license allows

You can build it into a product you sell, as long as you keep its copyright notice.

Judged on 2026-11-06 from the project's README and GitHub data. The license and age lines are worked out directly.

Built from

Follow it down: Yarn → TypeScript → Go → runs on a microchip

How compilers were built, back to punched paper tape

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