Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
ElsewhereArea: what it touches
Internal ChangesKind: in v2.1.268,
Internal ChangesSection of the release
What
When a subagent (a secondary Claude instance handling part of a task) reports a tool-use event that involved an API error, the event now carries an apiErrorKind field with the specific error value, in addition to the existing plain yes/no isApiError flag.
Why
This gives the interface and telemetry more detail about what specifically went wrong with a subagent's API call, rather than only knowing that some error occurred.