Source Intelligence

DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

All of v2.1.251 Home All releases olderv2.1.250
Claude Code v2.1.251

Published artifacts can carry thumbnail images

Use it now
Useful3 Signal2
Artifacts not in their notes

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

thumbnailthumbnailDark
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.

See this entry in the whole of v2.1.251 →