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SPECIFICTION
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Tank vs Yarn

Tank

tankpkg.dev

Yarn

yarnpkg.com

Side by side

FigureTankYarn
Price fromFreeFree
Free planYesYes
Free trial——
Open source——
WebYes—
WindowsYesYes
macOSYesYes
LinuxYesYes
APIYes—
Self-hostedYes—
Plans published11
Spec score · Package Managers8.5 (#21)8.7 (#10)
Dependency resolutionYesYes
Free planYesYes
Lockfile supportYesYes
Package formatsTank supports seven skill primitives: instruction, hook, tool, agent, rule, resource, and prompt, which can be combined into bundles.npm packages; tarballs; local,Git,link,patch,portal,and workspace references
Private registry authYesYes
PurposeTank is a security-first package manager for AI agent packages and skills.Yarn is a package manager that also describes itself as a project manager.
Supported platformsClaude Code,Cursor,GitHub Copilot,Codex,Windsurf,OpenCode,Cline,Roo CodeLinux,macOS,Windows

Plans

Tank

  • FreeFree

Tank pricing →

Yarn

  • YarnFree

Yarn pricing →

In their own words

Tank

Tank has no write-up on Specifiction yet; its figures are above.

Visit tankpkg.dev

Yarn

Yarn is a package manager and project manager for JavaScript projects, serving uses from simple projects to industry monorepos. It resolves dependencies, maintains lockfiles and provides workspaces that install and link packages within a project. Modern Yarn uses Plug'n'Play by default, generating a Node.js loader file instead of a typical node_modules folder; users can choose node_modules or pnpm-style symlink installs instead. Yarn caches installed packages and shares them among projects on the same machine. Its offline mirror and zero-installs workflow can keep cached packages in a repository and reduce reliance on the npm registry. Plugins can extend resolvers, fetchers, linkers, commands and lifecycle hooks. Generated editor SDKs and settings support VSCode, Vim, Emacs and Neovim. Yarn runs on Linux, macOS and Windows and is free, with no paid plans or usage limits stated. Its documentation notes that React Native and Expo require typical node_modules installs. Yarn does not run audits during installation by default; users can run yarn npm audit separately.

Visit yarnpkg.com