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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 v2.1.219 ·

Workshop artifacts get a parse and serialize fixed-point check at publish time

Workshop artifacts that would silently mutate on republish are now blocked at publish time.

You'll notice New Features
JSON All of v2.1.219
You'll noticeTier: how much it should matter to you
3Useful: my rating, 1 to 5
0Signal: worth watching, 1 to 5
ArtifactsArea: what it touches
New FeaturesKind: in v2.1.219,
New FeaturesSection of the release
What

Pages the verifier classifies as a workshop surface are re-parsed and re-serialized before publishing, and the publish is refused if the round trip changes anything. This catches artifacts that would silently mutate on every decision confirm, since each confirm republishes the page.

Details
  • two checks run: the round-tripped page must still pass the strict contract, and a second round trip must produce byte-identical output
  • two new violation rules, reparse-divergence and reparse-not-fixed-point, block the publish and point at the first divergence
  • only reached for pages that verify as a workshop surface; other pages are unaffected
Evidence

reparse-not-fixed-point

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

See this entry in the whole of v2.1.219 →

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