Building the systems around AI agents.
Agent harnesses · developer tools · technical education · open source
- Agent Harness from Scratch — a hands-on course that evolves a single LLM call into a production-style coding agent through real failure modes, from tool runtime and verification to checkpoints, context, HITL, observability, evaluation, subagents, and durable execution.
Python · TypeScript · Rust · Next.js · React · Node.js · Linux · Docker · Git · GitHub
Build agents. Understand the harness. Share what I learn.



