gstack: Why the Y Combinator CEO Turned His Claude Code Setup Into a Software Factory With 23 Specialist Roles
gstack (MIT, 105k stars, March 2026) is Garry Tan's published Claude Code configuration: 23 opinionated slash commands that assign specialist roles (CEO, Eng Manager, Designer, QA Lead, Security Officer, Release Manager, Doc Engineer) to Claude, cycling through a fixed Think → Plan → Build → Review → Test → Ship → Reflect loop. The design thesis is that Claude performs better with role identity and process structure than with free-form prompting, and the self-reported numbers are specific enough to be interesting: 600,000 lines of production code in 60 days.