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Closed Loop

Closed Loop is an agent skill (a SKILL.md file) from huytieu/COG-second-brain. Run one task through the V-model verification loop: CP-2 plan → CP-3 build → CP-3v component verify → CP-4 integration verify (full lane) → CP-5… It works with Claude Code, Codex, Cursor and Gemini CLI and has 1,319 GitHub stars across a repository of 2 listed skills.

github.com/huytieu/COG-second-brain/skills/closed-loop (opens in a new tab)

Data as of from the GitHub API; description from the skill's SKILL.md. Report an error

View on GitHub (opens in a new tab)

Add this skill

Claude

Claude Code loads skills from ~/.claude/skills/ (all projects) or .claude/skills/ (one project):

git clone --depth 1 https://github.com/huytieu/COG-second-brain.git
cp -r COG-second-brain/skills/closed-loop ~/.claude/skills/closed-loop   # personal, or .claude/skills in a project

In the Claude apps, zip the closed-loop folder and upload it under Customize > Skills > + > Upload a skill (code execution must be on).

ChatGPT / Codex

Codex reads skills from .agents/skills/ in a repo or ~/.agents/skills/ for every project:

git clone --depth 1 https://github.com/huytieu/COG-second-brain.git
cp -r COG-second-brain/skills/closed-loop .agents/skills/closed-loop   # repo; ~/.agents/skills for all projects

Standalone skills also load in the ChatGPT desktop app.

Cursor

Cursor loads skills from .cursor/skills/ (or ~/.cursor/skills/) and also reads .claude/skills/:

git clone --depth 1 https://github.com/huytieu/COG-second-brain.git
cp -r COG-second-brain/skills/closed-loop .cursor/skills/closed-loop   # project; ~/.cursor/skills for all projects

Source (checked Oct 7, 2026): code.claude.com/docs/en/skills (opens in a new tab), support.claude.com/en/articles/12512180-using-skills-in-claude (opens in a new tab), learn.chatgpt.com/docs/build-skills (opens in a new tab), cursor.com/docs/context/skills (opens in a new tab)

What this skill does

Run one task through the V-model verification loop: CP-2 plan → CP-3 build → CP-3v component verify → CP-4 integration verify (full lane) → CP-5 acceptance. The worker never grades its own homework; evidence rows trace back to AC-n. Opt-in: invoke with /closed-loop or by asking for the closed loop, proper verification, or an evidence trail. Ordinary work does not run this. Mechanical verification pipeline. Every verify step emits evidence rows tied to acceptance criterion IDs (AC-n).

When it triggers

  • invoke with /closed-loop or by asking for the closed loop, proper verification, or an evidence trail.

More skills in huytieu/COG-second-brain

2 skills are listed from this repository.

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FAQ

Closed Loop FAQ

Still curious? Email info@appsgit.com.

How do I install the Closed Loop skill?

Copy the closed-loop folder (the one containing SKILL.md) into ~/.claude/skills/ for Claude Code, .agents/skills/ for Codex or .cursor/skills/ for Cursor. The agent picks it up automatically when a task matches its description.

Is the Closed Loop skill free?

Yes. The repository is open source under the MIT license.

Is Closed Loop maintained?

The repository's most recent commit was on Oct 23, 2026. Its latest release is v3.16.0. appsgit only lists skills from repositories with a commit in the last six months.