Complex workflows rarely fit a single prompt. Multi-agent systems split work across specialized agents that delegate tasks to each other, much like a team of experts.
Specialization Wins
A research agent finds information. A writer agent turns it into copy. A review agent checks compliance. Each agent is simpler, more testable, and easier to improve.
Orchestration
The harness decides which agent runs when, passes context between them, and verifies the final output. Good orchestration prevents loops and keeps costs predictable.