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Sweep 22 Oct 2026 · 04:32Z Build v2.1.308 527 read Stable v2.1.308 Latest v2.1.308 Next v2.1.308 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.239 ·

Second emit site for the agent-spawn event, which still has no listener

Starting an async agent now announces itself on an internal channel that nothing in this build listens to.

Under the hood Notable Nothing to try yet Internal Changes
JSON All of v2.1.239
Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
4Signal: worth watching, 1 to 5
SubagentsArea: what it touches
Internal ChangesKind: in v2.1.239,
What probably matters to youSection of the release

Two sites now emit an agent-spawn event carrying agent id, type, parent and task registry, with no subscriber anywhere.

What

The path that starts an async agent now announces it on the same internal channel the Agent tool already used, carrying the agent id, agent type, parent agent id and task registry. Nothing subscribes to that channel anywhere in the build, so the two emits go nowhere.

Details
  • The channel is agentSpawned: one declaration, two emits, zero subscribers, in both v2.1.238 and v2.1.239.
  • Its neighbouring channels for evicted tasks and settled agents do have consumers, so this one being unread looks like groundwork rather than an oversight.
Evidence

agentSpawned

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

See this entry in the whole of v2.1.239 →

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