7-Day AI Agents: 5 Production Design Patterns for Long-Running LLM Workflows

Building AI Agents That Run for Seven Days: Five Production Design Patterns You spend weeks perfecting prompt engineering, fine‑tuning tool calls, and reducing response latency. Then your agent needs to stay alive for five days. Suddenly, those weeks don’t matter as much. Real production workflows — processing thousands of insurance claims, running week‑long sales sequences, reconciling financial data across systems — don’t fit inside a single conversation turn. They take days, not seconds. The moment you start building these long‑running agents, you hit a wall. Most agent architectures are stateless. They reconstruct context from a database on every interaction. And …