Harness Engineering
The Tool That Gave Us the Reins Had No Reins of Its Own — The Boundary Between Harness and Reins
"Reins Engineering — isn't that just harness engineering?" The two don't oppose each other — they're different parts of the same tack. But they are different parts. Even the world's best coding agent put no reins on its own code. That's because reins aren't something you have; they're something you apply.
Class 5. AI with Reins — Introduction to Reins Engineering
Harness engineering is a fence. Reins Engineering is a bridle. Don't change the model — add contracts.
Reins Engineering — AI with Reins
Harness engineering is a fence. It keeps the agent from going outside, but doesn't ensure it reaches the destination. Reins Engineering is the reins — steer with deterministic contracts, lock with ratchets, separate decisions from implementation.