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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.

← All of v2.1.251 Home All releases ←olderv2.1.250
Claude Code v2.1.251

Teammate idle notifications confirm they were delivered

Under the hood
Useful2 Signal3
Teammates

Teammate idle and failure notices are confirmed delivered, with a distinct log when they aren't.

What

When a teammate agent tells its team leader it has gone idle or failed, the code now checks that the mailbox write actually returned an id and logs a distinct line when delivery could not be confirmed, instead of assuming it landed. Telemetry is now captured for the notification result as well.

Evidence

not delivered (mailbox write returned no id)

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 v2.1.251 →