You'll noticeTier: how much it should matter to you
3Useful: my rating, 1 to 5
4Signal: worth watching, 1 to 5
Claude API SkillArea: what it touches
New FeaturesKind: in v2.1.224,
What probably matters to youSection of the release
What
Rosters accept a new {"type": "advisor", "model": ...} entry, at most one per roster, letting the main thread consult a more capable model partway through a turn.
Details
Consultations run as a platform-spawned thread under a reserved name and do not count against the 25-concurrent-thread limit.
Advice arrives as an agent.thread_message_received event, either plaintext or [{"type": "redacted"}] depending on the advisor model.
Fable 5 is documented as temporarily unavailable in the advisor role.