Graphite's approach to building developer tools emphasizes simplicity and developer velocity through a monorepo architecture using TypeScript, eschewing microservices and polyglot systems for a unified codebase. This strategy, inspired by experiences at Facebook and the principles of clean architecture, focuses on reducing software complexity by addressing change amplification, cognitive load, and unknown dependencies. Graphite's system prioritizes composition over complexity, employing dependency inversion and functional programming to maintain flexibility and testability. The company leverages a single server image for deployment, powered by a straightforward build system that uses Turbo to optimize build times, and employs a shared development environment to facilitate seamless onboarding. Infrastructure is managed with Terraform, allowing for comprehensive code review processes for both application and infrastructure changes. Graphite's architecture, though contrarian, is tailored to its specific needs, enabling its engineering team to rapidly ship features and maintain quality, with a focus on continuous improvement and developer experience.