Subagents and Agent Harness
Definition
Specialized subagents operate within an environment that manages tools, state, and processes.
Subagents take on clearly defined subtasks of a higher-level process. The execution environment provides, for example, tool access, handovers, logs, and checks.
Simply explained
A team divides tasks; a shared workspace keeps results and rules together.
Why it matters in practice
The division can make extensive tasks manageable and keep responsibilities visible.
Example from business
Hypothetical example: A main agent commissions one subagent with research and a second with proofreading an evaluation.
Limits and pitfalls
- Too many subagents cause coordination overhead. Shared files and conflicting assignments can damage results.
Origin & history
The pattern connects multi-agent systems with practical runtime management of tools and context.
Use in mid-sized companies
- Clearly define subtasks and specify inputs, result format, and completion criteria for each handover.
Frequently asked questions
Are multiple agents always better?
No; the additional coordination effort must be justified by the task.
Sources
Editorially reviewed on: