#harnessed.md

"The primary job is no longer to write code, but to design environments, specify intent, and build feedback loops that allow agents to do reliable work."

— OpenAI, Harness Engineering

A directory of companies who have gone all-in on harness engineering — building the environment, constraints, and feedback loops that let AI build the product.

##What is a harnessed company?

Traditionally engineers spent 80% of their time on features, 20% on the system. Harnessed companies flip that on its head: 80% goes to the harness — the machine that builds the machine. 20% guiding where it goes.

The harness has two parts:

    ╭·····································╮
    ·    failures become new guides       ·
    ·                                     ·
    ▼                                     ·
  Guides (feedforward)                    ·
    │                                     ·
    │ constrain + direct                  ·
    ▼                                     ·
  Agent builds ◄───────┐                  ·
    │                  │                  ·
    ▼                  │ no               ·
  Sensors (feedback) ··╁··················╯
    │                  │
    ▼                  │
  Pass? ───────────────┘
    │
   yes
    │
    ▼
  Ship

The system gets better over time. Every sensor failure is a candidate for a new guide — you don't fix the code, you fix the harness so it never breaks that way again. That's what makes it engineering, not configuration.

##Key reading