Module cache 

Functions

diff_hash

Compute a fast hash of the raw diff string.

get_head_commit

Return the current HEAD commit hash, or None if not in a git repo.

load

Try to load cached grouping for the given diff hash. Returns None if no cache, hash mismatch, parse error, or oversized file.

load_incremental

Try to load cached grouping for the given HEAD commit (incremental mode). Returns the cached groups and file hashes so the caller can compute the delta. Returns None if no cache, HEAD mismatch, empty file hashes, parse error, or oversized file.

save_with_state

Save grouping result to the cache file with optional incremental state.