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.
Summary-only refusal for someone else's artifact is gone
You'll notice
Useful2Signal3
Artifacts
You will no longer see the message saying another person's artifact can only be read as a summary.
What's wrong with this entry?
Anonymous. No account, no email.
What
The branch that told you a session could read only a summary of another person's artifact and never its full source has been deleted, so that message no longer appears.
Evidence
reader_persist_off
Strings lifted out of the shipped bundle, so the claim above can be checked against them.