You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
HooksArea: what it touches
ImprovementsKind: in v2.1.300,
ImprovementsSection of the release
What
A hook is a check or action you configure to run automatically at certain points in a session. An agent hook is one where a model does that work.
When the model assigned to an agent hook refuses the request, Claude Code now runs the hook again on a fallback model and says so in a message. Before, the hook was cancelled with the error "Agent hook did not return structured output".
Why
A refusal from one model no longer stops an agent hook from producing a result.
