Garry Tan, president of Y Combinator and co-founder of Initialized Capital, has open-sourced a Claude Code workflow called gstack that reframes how developers interact with AI coding assistants. Rather than treating Claude Code as a generic tool that responds to ad hoc prompts, gstack introduces a role-based system built on custom slash commands, turning a single AI assistant into a structured, opinionated development team. The setup uses Claude Code's native custom slash commands feature to assign distinct operational personas, each with its own priorities and constraints, covering everything from product strategy to deployment configuration. For intermediate developers already working with Claude Code, gstack offers an immediately adoptable framework that imposes the kind of structured thinking typically found in well-run engineering organizations.…