You'll noticeTier: how much it should matter to you
3Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
ArtifactsArea: what it touches
ImprovementsKind: in v2.1.239,
ImprovementsSection of the release
What
Every artifact tool result is now validated before display. When a record fails validation, Claude is told the record is unreadable and to re-run the action rather than being shown fields that cannot be trusted. This applies to all artifact results, with no flag.
Details
Listings are truncated with a count of rows that could not be salvaged.
Paths and content types are checked against patterns, and entry and field counts are capped.
Evidence
This record of the artifact listing is unreadable
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
