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Sweep 22 Oct 2026 · 21:04Z Build v2.1.309 528 read Stable v2.1.308 Latest v2.1.309 Next v2.1.309 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.251 ·

Published artifacts can carry thumbnail images

Thumbnail images count against the same total size budget as your published files.

Use it now No documentation found New Features
JSON All of v2.1.251
Use it nowTier: how much it should matter to you
3Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
ArtifactsArea: what it touches
New FeaturesKind: in v2.1.251,
What probably matters to youSection of the release
What

A publish can now include thumbnail and thumbnailDark images. Their sizes are subtracted from the same total size budget as the rest of the published files, so a large thumbnail leaves less room for everything else.

Details
  • Applied whenever the thumbnail or dark thumbnail is supplied; no flag involved.
  • Both images count against the one shared publish size cap.
Evidence

Xr(s.thumbnail) + Xr(s.thumbnailDark)

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

Read from
Names in the bundlethumbnailthumbnailDark

See this entry in the whole of v2.1.251 →

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