Red Green Mode

Autonomous test-fix loop: run an objective verifier (tests, type-check, lint, CI), fix what is red, re-run, and finish only when the verifier exit code is all green. Use when the user wants work driven to green without supervision, including long-run or parallel runs (红绿灯模式 / 跑到全绿 / 把 CI 修到全绿). Not for subjective work with no verifier or one-shot edits; use test-driven-development to write tests and systematic-debugging to root-cause one bug.

11 stars 1 forksTesting & QA

Install

skills CLI (Claude Code, Cursor, Codex and more)

npx skills add hidevinliu/red-green-mode --skill red-green-mode

Manual install

git clone --depth 1 https://github.com/hidevinliu/red-green-mode.git /tmp/red-green-mode
mkdir -p ~/.claude/skills
cp -r /tmp/red-green-mode/. ~/.claude/skills/red-green-mode

Personal skills live in ~/.claude/skills. Use .claude/skills in a project folder to share a skill with your team.

From the SKILL.md

# Red-Green Mode

## What this is / when to use it

An unattended **self-verification loop**: finish when the verifier is all green, stop and fix
whatever is red, then verify again.

> **The verifier's exit code decides right and wrong. The agent's opinion does not.**

- This mode governs **outer orchestration only** — when to stop, what counts as done, no cheating, always leave a way back.
- It does **not** teach you to diagnose a red (that's `systematic-debugging`) and does **not** write your tests (that's `test-driven-development`).
- Three preconditions, all required: ① an objective verifier that can tell right from wrong; ② a trustworthy referee (a red is genuinely red, a green can still catch bugs, a green is not tautological); ③ an unambiguous task. When ① is missing, **construct a red you can actually fix against** — do not just say "switch to TDD" and walk away.
- Money / people / contracts / SOPs / formulas → clear the business-rule discovery gate first. Task ships a PRD → clear the PRD-coverage gate before finishing ("tests green" ≠ "PRD delivered").
- **Single agent by default.** Long-run and task-parallel are optional outer modes; pass no flags and behaviour is unchanged.
- `VERSION-AND-STATE.md` is the single source of truth for state-file ownership, stop-condition layering and runtime degradation; release history is in `CHANGELOG.md`.

## Hard mechanisms (exit-code enforced — actually run these)

Read the full skill on GitHub

Details

Skill name: red-green-mode
Repository: hidevinliu/red-green-mode
License: MIT
Repo updated: 5 October 2026

FAQ

What does the Red Green Mode skill do?

How do I install the Red Green Mode skill?

skills CLI (Claude Code, Cursor, Codex and more): npx skills add hidevinliu/red-green-mode --skill red-green-mode. Skills go in ~/.claude/skills (personal) or .claude/skills (project), and Claude loads them automatically when a task matches the description.

Is Red Green Mode popular?

It lives in hidevinliu/red-green-mode, which has 11 GitHub stars and 1 forks.

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