harness-engineering

Set up OpenAI's harness engineering methodology in any repository. Creates the full agent-first infrastructure: AGENTS.md progressive disclosure map, architectural layer boundaries with mechanical enforcement, testing framework, CI pipeline, golden principles documentation, garbage collection scripts, and pre-commit hooks. Use when asked to "set up harness engineering," "make the repo agent-ready," "add architectural boundaries," "set up testing and CI," or "adopt agent-first engineering." Works with any stack — React, Next.js, Python, Go, Rails, etc.