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Multi-agent systems
Also called: agents talking to agents, orchestrator and workers
Setups where several agents (often specialised) collaborate on a task — one planning and delegating, others executing — coordinating through messages rather than a single agent doing everything.
Splitting work across focused agents can handle bigger tasks, but it multiplies the failure and security surface: errors compound between agents, and an injected instruction in one can propagate through the others.
Automatically being more capable. More agents add coordination cost and new failure modes; they help only when the task genuinely benefits from division of labour.