A skill is a pack of instructions you add to a coding tool.
gstack is free. You can read the code and use it. Garry Tan made it. He is the president and CEO of Y Combinator.
The project page calls it his Claude Code setup. It has 23 tools. They do six jobs: boss, designer, engineering lead, release lead, docs, and tester.
On 16 October 2026 it had 136,673 stars and 20,279 copies. The license is MIT. The code is TypeScript. The last update was that same day.
The six jobs
The project page names six jobs. The longer list in the README has more commands than the line that says "23 tools". These cards are the jobs, not every command.
- Boss. Think about the product before anyone writes code.
- Designer. Score the design, then fix what is weak.
- Engineering lead. Decide how it is built, what could go wrong, and which tests to write.
- Release lead. Run the checks, send the code, and ask to add the change.
- Docs. Check that the written notes still match the change.
- Tester. Try the real thing, and keep a test that fails.
The order of work
The README says the steps run in order. Each step reads what the one before it wrote.
The command /office-hours writes a short note. The planning step reads that note. The command /plan-eng-review writes a test plan. The command /qa reads that plan.
- Think. Six questions, then a short note.
- Plan. The boss, the designer, and the engineer look, in that order.
- Build. The plan becomes the change.
- Review. Find bugs the automatic tests miss, and check security.
- Test. Try the real behavior, and keep a test that fails.
- Ship. Run the checks, send the code, and open a pull request.
- Reflect. Look back once a week, and keep the notes the tool saved.
Commands along the way: /office-hours, /plan-ceo-review, /plan-eng-review, /plan-design-review, /autoplan, /review, /cso, /design-review, /qa, /qa-only, /ship, /land-and-deploy, /document-release, /retro, and /learn.
Other tools give a second opinion (/codex), help you stay safe (/careful, /freeze, /guard), and update the setup (/gstack-upgrade). To remove it, run ~/.claude/skills/gstack/bin/gstack-uninstall.
Who it is for
The README names three kinds of people.
Founders and CEOs who still ship their own work. People new to Claude Code who want jobs to pick, not an empty box. Tech leads who want a review, a test, and a release check on every change.
How to install
You need Claude Code, Git, and Bun 1.4.2 or newer. Setup will not run if Bun is older than 1.3.3. You need Node.js only on Windows.
The usual install is for Claude Code. ./setup --host auto sets it up for the other tools the README lists.
git clone --single-branch --depth 1 https://github.com/garrytan/gstack.git ~/.claude/skills/gstack
cd ~/.claude/skills/gstack && ./setupTry /office-hours first. Then /plan-ceo-review, /review, and /qa.
A team install is optional. From the gstack folder, run ./setup --team. Then run gstack-team-init required. Then commit the .claude/ folder and CLAUDE.md. Use optional instead of required if you do not want to block your teammates.