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Harness Engineering

· One min read
Hu Chen

AI Agent = LLM + Harness

  • LLM: Claude, ChatGPT, Gemini, etc.
  • Harness: Codex, Claude Code, OpenClaw, etc.
Prompt -> Context -> Harness

AGENTS.md: Rules for AI Agent

  • Should not very long, more like a map not a dictionary Nature Language Harness

Life-long AI Agent: Feedback

  • Ground truth: As close to ground truth as possible
  • Numerical Feedback: As large reward possible
  • Verbalized Feedback: "good job", "you are stupid", etc.
  • Environment Feedback: Error message from program