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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.

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Claude Code v2.1.248

Forks are told how to address the main conversation

Under the hood
Useful1 Signal2
Subagents

Forked tasks are given the main conversation's name so they can address it.

What

A new template alongside the end-conversation prompt tells a forked task to address the main conversation by name, interpolated at runtime. The refusal text you see when a conversation ends is unchanged.

Evidence

Claude ended the conversation. To continue, please start a new session.

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

Related

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

See this entry in the whole of v2.1.248 →