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 v2.1.224 Home All releases olderv2.1.223 v2.1.225newer

Forking a session tells the model the fork is separate

You'll notice
Useful3 Signal3
Sessions

After forking, Claude is told the fork is a separate session reachable by name.

What

After forking, Claude is now told that the fork runs as its own session, that its work is invisible to the current conversation, and that it can be reached by name through the session roster. This branch previously attached nothing.

Details
  • The message is produced only when cross-session messaging applies; otherwise nothing is attached.
Evidence

The fork runs as its own separate session

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

See this entry in the whole of v2.1.224 →