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openclaw-skill/openclaw-knowhow-skill/docs/agents/subagents.md
Selig 4c966a3ad2 Initial commit: OpenClaw Skill Collection
6 custom skills (assign-task, dispatch-webhook, daily-briefing,
task-capture, qmd-brain, tts-voice) with technical documentation.
Compatible with Claude Code, OpenClaw, Codex CLI, and OpenCode.
2026-03-13 10:58:30 +08:00

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# Sub-Agents Documentation
## Overview
Sub-agents are background agent processes spawned from a parent agent run. They execute in isolated sessions and report results back to the requesting chat channel upon completion.
## Key Commands
The `/subagents` slash command manages sub-agent runs:
- `list`: View all active sub-agents
- `stop`: Terminate specific or all sub-agents
- `log`: Access execution logs with optional filters
- `info`: Display run metadata and session details
- `send`: Transmit messages to running sub-agents
## Spawning Sub-Agents
The `sessions_spawn` tool initiates sub-agent runs with these parameters:
- `task` (required): The work assignment
- `label`, `agentId`, `model`, `thinking`: Optional configuration overrides
- `runTimeoutSeconds`: Execution time limit
- `cleanup`: Archive behavior (`delete` or `keep`)
## Design Principles
Sub-agents do not get session tools by default, maintaining security boundaries. They cannot spawn their own sub-agents, preventing cascade complexity. Each maintains separate token accounting for cost management.
## Session Management
Sub-agent sessions use the format `agent:<agentId>:subagent:<uuid>`. Authentication resolves through the target agent's configuration, with main agent profiles available as fallbacks. Sessions auto-archive after 60 minutes by default.
## Announce Mechanism
Upon completion, sub-agents report results through an announce step. These messages include:
- Status (success, error, timeout, unknown)
- Result summary from the announce step
- Error details and contextual notes
- Runtime metrics and token usage statistics
## Tool Restrictions
By default, sub-agents cannot access session-specific tools like `sessions_list`, `sessions_history`, `sessions_send`, or `sessions_spawn`. Administrators can customize allowed tools through configuration.
## Concurrency & Performance
Sub-agents operate on a dedicated queue lane with configurable maximum concurrent runs (default: 8). Each maintains independent context and resource usage for cost optimization on heavy workloads.