Nothing to try yetTier: how much it should matter to you
3Useful: my rating, 1 to 5
3Signal: worth watching, 1 to 5
ArtifactsArea: what it touches
Internal ChangesKind: in v2.1.269,
What probably matters to youSection of the release
Unclear The finding doesn't say what the new result fields contain or what happens when the version check fails.
What
Artifact database writes (both single writes and batch writes) can now pass a requireVersion flag to the server, asking it to reject a write if the artifact has changed since the client last read it.
Writes made through the str_replace editing path also pass requireVersion; this only happens when the artifact-DB feature (CLAUDE_CODE_ARTIFACT_DB, on by default) is enabled and either the CLAUDE_CODE_ARTIFACT_DB_STR_REPLACE environment variable or a remote flag (tengu_umber_stile, off by default) is set.
If a server does not understand requireVersion, the client remembers that server as unsupported and automatically retries the write without requireVersion instead of failing.
Why
This adds an opt-in safeguard against silently overwriting someone else's concurrent changes to an artifact, while staying compatible with older servers that don't support the check yet.
