Real, scalable agent systems in TypeScript and NestJS — plus the harness, the loops, and the system design that keep them standing. Queues, retries, evals, observability, cost, the failure modes nobody demos. I write it all down here.
One issue a week · for backend engineers
Harness patterns, agent loops, MCP, and the system design behind real, scalable agents. Written by someone who has to keep them running. No fluff, no hype.
Every agent I ship is a loop with a verifier — gather, act, check, repeat. The model is the easy part; the harness around it is what makes it reliable at scale.