Subagent

What it does

Spawns a background agent that runs in parallel with the main conversation. Use it for self-contained research or implementation, not for a handful of tool calls.

Setup

None. Built in.

Permissions

• A subagent inherits the same tool and host gates as the parent. It does not bypass approvals.

Lifecycle

pending, then running, then completed, failed, or aborted. The parent is notified at a terminal status. Do not poll. Read output after it finishes.

Tips

• Small lookups stay inline.
• External coding agents (Codex or similar, if you installed the adapter) are ACP, not this skill.