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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

Messaging tool now explains how subagent addressing works

You'll notice
Useful2 Signal2
Cross-Session Messaging

Subagent messages to other sessions now explain that replies land in the parent conversation.

What

The cross-session messaging tool description now warns that messages travel between sessions, so when a subagent sends one it goes out under the parent session's address and any reply arrives in the parent's conversation rather than the subagent's.

Details
  • Also fixes an inconsistent reference so both mentions of the listing command point at the same one.
Evidence

if you are a subagent, your send goes out under your parent session's address

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 →