One agent per independent problem domain, all dispatched in a single response so they run concurrently.

Each agent's prompt carries:

Scope: one file, one subsystem, one problem. "Fix all the tests" loses the agent.
Context, pasted in: error messages, test names, relevant paths. Agents inherit nothing from the session.
Constraints: what must not change ("tests only", "do not touch production code").
Expected return: a summary of root cause and changes, so integration is reviewable.

Integrate when they return: read each summary, check the diffs for conflicts, run the full suite, then the verify skill before claiming the batch done.

Do not use when failures are related (fixing one may fix the rest: investigate together first), when the problem is still exploratory, or when agents would touch the same files.

parallel