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 v2.1.248 Home All releases olderv2.1.247 v2.1.250newer
Claude Code v2.1.248

Artifact reads can be served from a local copy

You'll notice
Useful2 Signal2
Artifacts

Repeat artifact reads can be served from a local copy instead of a network round trip.

What

Reading an artifact without naming a version can now be answered from a locally maintained copy of the rendered HTML instead of a round trip to the *.frame.claudeusercontent.com host, which makes repeat reads faster.

Details
  • Only applies when a local copy exists for that artifact; otherwise the remote fetch runs as before.
  • Requests that pin an explicit version always go remote.
  • The read logs the sequence number it was served at.
Evidence

[artifact] read served from the local replica at seq

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

See this entry in the whole of v2.1.248 →