The Harness

Agentic control for anything that acts. The model writes the controller, not the actions; programs, learned policies and reflexes run at their own speed, and the model is consulted only when the world changes.

Quickstart Concepts

pip install harness-policy
harness run dev          # installs the skills and models it uses on first run
harness report runs/dev

Any language model

Plans and writes the controller at decision points, not on every step. Swap the model in one line of configuration. Learn more.

Programs and learned policies

Programs compose skills and tools; a learned policy takes over what code cannot express. Learn more.

Reflexes

Guards and controllers the model writes run on every control step, so a slip is caught before the model hears of it. Learn more.

A fixed safety layer

Every command passes limits that nothing learns or rewrites, whoever wrote it. Learn more.