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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 v2.1.238

Subagent lifecycle events are published with no consumer

Under the hood
Useful1 Signal3
Subagents

Subagents now announce when they finish, fail or are killed, and nothing listens yet.

Settled, spawned and resume-failed subagent events are published with no subscriber in this build.

What

Subagent completion, failure and kill now publish a settled event carrying the outcome ("completed" with a stranded-messages flag, "failed", or "killed"). Nothing in this build subscribes to it, nor to the spawned and resume-failed events; the only subagent channel with a listener is the stranded-messages one. This is groundwork with no visible effect yet.

Evidence

agentSettled

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 v2.1.238 →