Yarn supports various protocols for defining dependencies in your application. While you’re certainly familiar with the semver protocol which downloads packages from the npm registry, Yarn is also able to retrieve packages from git, the filesystem, or even generate them on the fly.

Available protocols

Note

Some of these protocols have alternative syntaxes, such as the git protocol which also supports strings like /. Check their respective pages for more information.

Protocol	Description
catalog:	Delegate the dependency to the project configuration.
file:	Compile a local folder into a cached archive.
file:	Extract a package from a tgz archive.
git:	Retrieve a package from a git repository.
link:	Pretend the specified folder is a package.
npm:	Download a package from the npm registry.
portal:	Connect the project to a package in another folder.
workspace:	Connect a workspace to another workspace.