Neither the README nor the error messages explicitly mention directory paths needing to stay the same. It's followed in the example and referenced in the cache version section, but it's easy to miss there.

When they're different, the error is simply 'Cache not found for input keys' but doesn't clarify that the failure is due to the (hidden) path/compression logic.

REQUEST:

1. The README's save/restore section should mention that the directories must be the same.

2. Extend the 'Cache not found for input keys' message to 'Cache not found for input keys or version hash:' or add a separate 'Cache entry for key found but did not match cache version hash' error.