Bower 1.8.x cache locking limits under concurrent installs

Bower 1.8.x resolves dependencies into a flat tree and relies on a local package cache shared across projects. The resolver performs sequential Git fetches for each package, and the official documentation does not describe behavior when multiple bower install processes run concurrently against the same cache. Because the project has been unmaintained since 2017, it is unclear whether the .bower-lock file mechanism reliably prevents cache corruption or if race conditions can still emerge depending on the operating system and Git version. Teams that parallelize installations in continuous integration may need to treat cache safety as an unverified assumption.

Does Bower 1.8.x guarantee local cache integrity when two install processes target the same cache simultaneously? Is the locking behavior deterministic enough for parallelized pipelines, or should concurrent installs be serialized externally to avoid undefined cache states?