You'll notice
Restoring file-history backups now avoids duplicate copy operations for the same backup file
What
When Claude Code restores file-history backups for a resumed session, it now keeps track of in-flight backup-copy operations, keyed by the backup file's name. If multiple messages reference the same backup file at once, they now share a single copy operation instead of each triggering a redundant copy.
Why
This avoids unnecessary duplicate work when restoring a resumed session, which is more efficient and reduces the chance of conflicting concurrent copies of the same backup file.