Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
Turn HandlingArea: what it touches
Internal ChangesKind: in v2.1.271,
Internal ChangesSection of the release
What
The metadata Claude Code builds for each turn where it tracks model and effort level now also includes an optional agentId field, alongside the existing model, effort, and message-count fields.
Why
Since a spawned subagent (a separate Claude instance handling a subtask) can now be identified by its agentId, this lets per-turn tracking data be tied back to the specific agent that made a given tool call, rather than only to the overall session.
