agent-orchestration

Orchestrating multiple LLM agents and steps in a TypeScript/Node/NestJS backend - sequential, parallel, router, orchestrator-workers, evaluator-optimiser, and handoff patterns; shared state; typed message contracts between agents; concurrency limits; durable and resumable execution; timeouts and cancellation; cost control; preventing runaway loops; and preferring deterministic code over LLM routing. Provider-agnostic. Load when coordinating more than one agent or model call, designing handoffs, or making multi-step runs durable and bounded.