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.
Artifact read-back failures no longer feed server payloads to the model
You'll notice
Useful3Signal2
Artifacts
Failed artifact read-backs now give a short error instead of dumping server output into context.
What's wrong with this entry?
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What
When reading an artifact back fails or returns malformed data, the returned error is now just read-back HTTP <status> or malformed read-back body. The full response body and parser message go to the debug log instead of into the model's context.
Evidence
malformed read-back body
Strings lifted out of the shipped bundle, so the claim above can be checked against them.