Y Combinator president Garry Tan has open-sourced gstack, a curated collection of AI coding Skills designed to enhance LLM-powered development workflows. The project packages task-specific prompt sets — covering everything from code review to architecture planning — into a format that integrates directly with AI-native IDEs like Cursor and Windsurf.
What makes gstack interesting is the curation. Rather than a generic prompt library, each Skill is purpose-built for a specific development task and tested against real-world codebases. The collection reflects patterns that Tan's team at YC has found effective across hundreds of portfolio companies working with AI coding tools.