Linked worktrees read and write the parse cache and durable ParsedFile
store under the store's caches/ directory. Before pruning, a run folds
in the chunk keys recorded by every member slot and commit graph, and
the fold, prune and save run under a store-wide cache lock so one
member never evicts another's live chunks.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
