Harness Engineering, Two Frameworks

A 8-part guide. Start at Part 1, or jump to any part below.

The parts

1. The Naked Agent: Why Your Framework Hands You a Loop, Not a Harness
2. Tool Contracts and Validators: Move the Rule Out of the Prompt
3. The Allergy Was in the Vector Store. The Agent Still Bought the Shrimp.
4. Context Assembly: The Window Never Overflowed, and the Agent Still Forgot
5. The Retry That Booked Marta's Flight Twice
6. Multi-Agent Orchestration: When to Split the Agent, and How Not to Pay 15x for It
7. Human-in-the-Loop: The Booking No One Approved
8. The Green Dashboard and the Seven Customers Who Were Never Booked