Agent Harness Engineering
17 sessions from a simple loop to production-ready agent teams
An agent is a model.
Not a framework. Not a prompt chain.
The model decides. The harness executes.
Learn to build the harness.
Phase 1: The Loop
Phase 2: Planning & Knowledge
Phase 3: Persistence
Phase 4: Teams
9. Agent Teams
25 min read"When the task is too big for one, delegate to teammates"
10. Team Protocols
30 min read"Teammates need shared communication rules"
11. Autonomous Agents
30 min read"Teammates scan the board and claim tasks themselves"
12. Worktree + Task Isolation
30 min read"Each works in its own directory, no interference"
Phase 5: Production
13. Agent Evals
25 min read"You can't improve what you can't measure"
14. Guardrails & Safety
25 min read"Trust but verify — then verify again"
15. Observability & Debugging
25 min read"When the agent derails at 2am, logs are your only witness"
16. Shipping to Production
30 min read"A demo agent is easy; a reliable agent is engineering"
17. Capstone: Code Review Agent
35 min read"Everything you learned, one system"