

Or maybe your credentials will rotate and you will start getting authentication issues. Or maybe the network will fail and your packages won't be available anymore. Or maybe your production environments will change and yarn install won't be able to write in the temporary directories anymore.

While Yarn does its best to guarantee that what works now will keep working, there's always the off chance that a future Yarn release will introduce a bug that will prevent you from installing your project. The main way it does this is through a lockfile, which contains all the information needed for a project to be installed in a reproducible way across systems. Yarn does its best to guarantee that running yarn install twice will give you the same result in both cases.

How does Yarn impact a project's stability?
