You'll noticeTier: how much it should matter to you
4Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
SubagentsArea: what it touches
New FeaturesKind: in v2.1.292,
What probably matters to youSection of the release
Unclear It is not stated whether every agent type and every build accepts the effort field.
What
The Agent tool is what Claude uses to start a subagent, a helper agent that works on a delegated task. It now accepts an optional effort field that sets how much reasoning effort the subagent uses.
Claude is told to set this field only when you, or instructions such as CLAUDE.md or a skill, explicitly ask for that agent or delegated work to run at a specific effort level. For subagent_type: "fork", the instructions add that a fork always runs at the same effort as the agent that started it.
Why
If you want delegated work done at a particular effort level, you can now ask for it, either in your request or in CLAUDE.md or a skill, and the subagent will run that way.
How sure we are
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubtIt is not stated whether every agent type and every build accepts the `effort` field.
