Word
Subagent
A subagent is a helper an agent starts to do one job, which knows only what it was told and then disappears.
Also called: sub-agent, task agent
Your agent starts one for a single job. It begins with a clean slate, no memory of your conversation, does the job, hands back a short answer, and disappears.
You'll meet them when a task gets big enough that one agent starts losing the thread: reviewing a large change, searching a project you've grown for months, drafting several files at once.
The thing worth knowing is that a subagent only knows what it was handed at the start. When one ignores an instruction you gave half an hour ago, it never heard it.