You'll noticeTier: how much it should matter to you
1Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
Agent TeamsArea: what it touches
Bug FixesKind: in v2.1.290,
Bug FixesSection of the release
What
When Claude starts another agent (a separate helper working alongside it), it gets back a short result that says the agent is running and will receive instructions by mailbox. The agent_id line in that result now holds the agent's own ID. Before, it held the teammate ID.
Why
The ID Claude sees, and may use to refer to that agent later, now comes from a different field.
How sure we are
One source agreesOne thing we can check says the same as this entry.
Anthropic's release notes agreeChanged an in-process teammate's agent_id in Agent results to its agent ID (its name@team address stays in teammate_id); TeammateIdle hooks…
