Sub-agent
A sub-agent is an agent that receives a subtask from a harness and works with its own context, and often its own sandbox.
A sub-agent is an agent that receives a subtask from an agent harness. Sub-agents appear in multi-agent designs. In such a design, the harness hands subtasks to sub-agents and merges their results. Each sub-agent works with its own context, and often with its own sandbox.