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291291| `description` | Yes | When Claude should delegate to this subagent |
292292| `tools` | No | [Tools](#available-tools) the subagent can use, as a comma-separated string such as `Read, Grep, Bash` or a YAML list. Inherits every tool available to subagents if omitted. If no entry in the list resolves to a tool, the subagent usually [fails to launch](/docs/en/errors#agent-would-be-spawned-with-zero-tools) with an error naming the entries. To preload Skills into context, use the `skills` field rather than listing `Skill` here |
293293| `disallowedTools` | No | Tools to deny, removed from inherited or specified list. Same format as `tools`. An entry with a specifier, such as `Bash(git push *)`, still [removes the whole tool](#available-tools) |
294| `model` | No | [Model](#choose-a-model) to use: `sonnet`, `opus`, `haiku`, `fable`, a full model ID such as `claude-opus-5`, or `inherit`. When you omit it, Claude Code picks the model in the [subagent model order](#choose-a-model) |
294| `model` | No | [Model](#choose-a-model) to use: `sonnet`, `opus`, `haiku`, `fable`, a full model ID such as `claude-opus-5-5`, or `inherit`. When you omit it, Claude Code picks the model in the [subagent model order](#choose-a-model) |
295295| `permissionMode` | No | [Permission mode](#permission-modes): `default`, `acceptEdits`, `auto`, `dontAsk`, `bypassPermissions`, `plan`, or `manual` as an alias for `default`. The `manual` alias requires Claude Code v2.1.200 or later. Ignored for [plugin subagents](#choose-the-subagent-scope) |
296296| `maxTurns` | No | Maximum number of agentic turns before the subagent stops. When the subagent reaches the limit, Claude Code returns its output marked as partial, and Claude can [resume it](#resume-subagents) to continue. The partial marking requires Claude Code v2.1.246 or later |
297297| `skills` | No | [Skills](/docs/en/skills) to preload into the subagent's context at startup. The full skill content is injected, not only the description. Subagents can still invoke unlisted project, user, and plugin skills through the Skill tool |
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340340The `model` field controls which model the subagent uses:
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342342* **Model alias**: use one of the available aliases: `sonnet`, `opus`, `haiku`, or `fable`
343* **Full model ID**: use a full model ID such as `claude-opus-5` or `claude-sonnet-5`. Accepts the same values as the `--model` flag
343* **Full model ID**: use a full model ID such as `claude-opus-5-5` or `claude-sonnet-5`. Accepts the same values as the `--model` flag
344344* **inherit**: use the same model as the main conversation
345345
346346When Claude invokes a subagent, it can also pass a `model` parameter for that specific invocation. Claude Code resolves the subagent's model in this order: