GitHub - garrytan/gstack: Use Garry Tan's exact Claude Code setup: 23 opinionated tools that serve as CEO, Designer, Eng Manager, Release Manager, Doc Engineer, and QA
gstack is Garry Tan's (President & CEO of Y Combinator) open-source Claude Code skill pack — 23 opinionated slash commands plus 8 power tools that turn Claude Code into a full virtual engineering team (CEO, designer, eng manager, reviewer, QA, CSO, release engineer). Skills chain together as a sprint: /office-hours → /autoplan → build → /review + /codex → /qa → /ship → /land-and-deploy → /canary → /retro, with GStack Browser, ML prompt-injection defense, cross-agent /pair-agent coordination, and parallel sprint support via Conductor. Works on 10 AI coding agents; MIT-licensed.
A concrete, battle-tested template for running Claude Code as an engineering team rather than a copilot — and a case study that the YC President uses to claim ~810× his 2013 logical-LOC velocity. Worth studying for anyone building agent tooling, skill packs, or multi-agent coordination patterns.
Key points
- 1
23 slash-command skills mapped to startup roles (CEO, designer, eng manager, QA, CSO, release engineer, DX lead, doc engineer) plus 8 power tools
- 2
Sprint-shaped flow Think -> Plan -> Build -> Review -> Test -> Ship -> Reflect where each skill consumes artifacts from the previous one
- 3
GStack Browser (headed Chromium + sidebar agent) with Sonnet/Opus auto-routing and layered ML prompt-injection defense (22MB classifier + Haiku transcript vote + canary token, optional DeBERTa-v3 ensemble)
- 4
/pair-agent lets Claude Code, OpenClaw, Hermes, Codex, Cursor, etc. coordinate in the same browser with scoped tokens, tab isolation, rate limiting, and ngrok auto-tunnel
- 5
/codex provides a cross-model second opinion from OpenAI Codex CLI; overlap with /review is surfaced as cross-model analysis
- 6
Parallel sprints (10-15 at once) via Conductor; continuous checkpoint mode auto-commits WIP that /ship filter-squashes before PR
- 7
Works on 10 AI coding agents (Claude Code, Codex, OpenCode, Cursor, Factory Droid, Slate, Kiro, Hermes, GBrain, OpenClaw via ACP); ClawHub ships four native OpenClaw variants
- 8
MIT licensed, 80.3k stars / 11.6k forks, opt-in Supabase telemetry that never sends code or prompts
Best quotes
“I don't think I've typed like a line of code probably since December, basically, which is an extremely large change. — Andrej Karpathy, No Priors podcast, March 2026”
“That is not a copilot. That is a team.”
“gstack is a process, not a collection of tools.”
“gstack is powerful with one sprint. It is transformative with ten running at once.”