Subagents in the SDK changedagent-sdk/subagents
Nearest release: v2.1.267, published 2 hours before this site recorded the change. Shown because the two are within 24 hours of each other. Nothing here says the release caused the edit.
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14 Aug 2026
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152152| `maxTurns` | `number` | No | Maximum number of agentic turns before the agent stops. When the agent reaches the limit, Claude Code returns its output marked as partial, and you can [resume the agent](#resume-subagents) to continue. The partial marking requires Claude Code v2.1.246 or later |
153153| `background` | `boolean` | No | Run this agent as a non-blocking background task when invoked |
154154| `effort` | `'low' \| 'medium' \| 'high' \| 'xhigh' \| 'max' \| number` | No | Reasoning effort level for this agent |
155| `permissionMode` | `PermissionMode` | No | Permission mode for tool execution within this agent |
155| `permissionMode` | `PermissionMode` | No | Permission mode for tool execution within this agent. The [subagent inheritance rules](/docs/en/agent-sdk/permissions#available-modes) decide when it applies |
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157157In the Python SDK, multi-word field names such as `disallowedTools` and `mcpServers` keep their camelCase spelling to match the wire format rather than following Python's snake\_case convention. See the [`AgentDefinition` reference](/docs/en/agent-sdk/python#agentdefinition) for details.
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