gstack: Garry Tan's Claude Code Skill Setup for opinionated AI Coding

Garry Tan, president of Y Combinator, has open-sourced gstack, a Claude Code workflow that uses six custom slash commands to assign distinct operational personas to the AI: CEO, Engineering Manager, Senior Engineer, Release Manager, QA Engineer, and DevOps Engineer. Each role constrains Claude's focus to concerns appropriate for that development phase, turning a generic AI assistant into a structured, role-based development team. The article explains all six commands, provides a bash installation script, demonstrates a real workflow sequence for building an API endpoint, and discusses how gstack compares to default Claude Code usage. The key benefit is that role constraints reduce revision cycles and enforce structured thinking before implementation begins.