This repository is the full-stack implementation of Mega, a large-monorepo Git hosting and code collaboration platform with a Rust backend and a large React/Next.js frontend. The backend is split into several crates: mono provides the HTTP/SSH API server, ceres contains application services for Git operations, change lists (CLs), code review, build triggers, webhooks and notifications, jupiter handles persistence through SeaORM entities and storage services, jupiter-migrate manages a large sequence of database migrations, and orion/orion-server implement a Buck2-based distributed build orchestration system. The frontend in moon/apps/web is a feature-rich collaboration application with posts, notes, chat, notifications, project management, diff viewing, CL/merge-queue review, admin groups, OAuth integrations, and editor support. The core operational flow is: git push/import -> ceres transport and jupiter storage -> change list and merge-queue workflows -> build triggers sent to Orion -> build events/checks streamed back to the UI.