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Sweep 22 Oct 2026 · 04:32Z Build v2.1.308 527 read Stable v2.1.308 Latest v2.1.308 Next v2.1.308 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.239 ·

Artifact result renderers validate every field

All artifact result displays now validate their data instead of trusting a possibly corrupt transcript.

You'll notice Improvements
JSON All of v2.1.239
You'll noticeTier: how much it should matter to you
2Useful: 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

Threads, watches, rooms, asset upload and list, verify, room send, resume replies and unwatch results are all rewritten to check the recorded shape rather than trust it, so a corrupted transcript no longer produces confident but wrong output.

Details
  • Rows that fail validation are counted and reported as unreadable; list rows are capped.
  • Numbers and URLs go through validators with fallbacks such as "?" and "(unrecognized url)".
  • The model is told to re-run the action for a live read instead of quoting the stale record.
Evidence

This record of a verify result is unreadable

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

See this entry in the whole of v2.1.239 →

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