- CLI holds a lock file from load to save, so concurrent commands can't
lose an update; stale locks from crashed runs are taken over
- load() renumbers duplicate ids from the old add() bug instead of
refusing the file
- save() keeps owner, group and setgid on the temp file, and falls back to
an in-place write for hard-linked files, files whose owner/group can't
be kept, and directories that aren't writable
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
christianandClaude Opus 5.5
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