agent-design

Designing a single LLM agent in a TypeScript/Node/NestJS backend - deciding between a single call, a fixed workflow, and an agent; the agent loop; goals and explicit stop conditions; step, token, time, and cost budgets; state and memory; planning; human-in-the-loop approval; failure handling; single-responsibility agents; and autonomy levels. Provider-agnostic. Load when deciding whether to build an agent, designing an agent loop, setting limits, or adding approvals and recovery.