Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
ArtifactsArea: what it touches
Internal ChangesKind: in v2.1.281,
Internal ChangesSection of the release
What
The details Claude Code keeps about an artifact now include publishPreconditions: true when the source data sets it. When it is set, writing or removing files in that artifact goes through a precondition check, which confirms each file is still what Claude Code expects before changing it.
Why
This lets per-file conflict checks on publishing be switched on for individual artifacts, so edits are less likely to overwrite changes made elsewhere.