{"version":"2.1.292","anchor":"agent-tool-gains-an-effort-parameter","canonical_anchor":"agent-tool-gains-an-effort-parameter","heading":"Subagents can be started at a specific effort level","tier":"notice","area":"Subagents","scope":"individual","heads_up":false,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.292\/e\/agent-tool-gains-an-effort-parameter","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.292","markdown":"### Subagents can be started at a specific effort level\n\nThe Agent tool now takes an optional `effort` field, used only when you or your instructions ask for delegated work at a specific effort level\n\n**Unclear.** It is not stated whether every agent type and every build accepts the `effort` field.\n\n**What**\n\nThe 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.\n\nClaude 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.\n\n**Why**\n\nIf 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.\n\n- Area: Subagents\n- Tier: You'll notice\n- Useful: 4\/5\n- Signal: 2\/5\n- Scope: individual\n- Heads-up: no"}