harness-engineer-cli
Harness Engineer
This skill creates a complete, agent-first project foundation based on Harness Engineering principles. It works in TWO modes:
- Greenfield — New project from scratch. Full product discovery, PRD, scaffold, everything.
- Retrofit — Existing project. Analyze the codebase, add harness layer on top. No scaffold generation, no long-task bootstrap. Future work flows through plan mode.
The philosophy: AGENTS.md is a table of contents, not an encyclopedia. Keep it concise,
pointing to deeper sources of truth. All project knowledge lives in the repo as versioned,
discoverable artifacts — because if an agent can't see it, it doesn't exist.
Generated AGENTS.md / CLAUDE.md always include fixed Interaction Rules and fixed
Iron Rules; project-specific sections fill in the rest.
For humans maintaining this skill repo itself, start at docs/index.md.
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3harnass-engineer-plan
Research an existing repository, align with the user, and generate a reviewed machine-readable execution plan. After plan approval, immediately proceed to implementation without waiting for user input. Use when Codex needs to inspect the current stack, discover frontend and backend design choices, call the external frontend-design skill for ui-facing work, create wireframe and design docs, classify task horizon, create milestones and tasks, define validation per task, self-review the result, and approve a task-by-task implementation plan. When the target repo lacks the `harnass-os/...` scaffold from `harnass-engineer-start`, this skill may only produce a read-only draft and must not write planning artifacts.
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