Harness Gitness is an open-source DevOps platform that provides Git hosting, CI/CD pipelines, artifact registries, and cloud development environments (Gitspaces). The system is built as a monolithic Go backend with a React/TypeScript frontend, using Google Wire for dependency injection and supporting both PostgreSQL and SQLite databases. Key entry points include the main server binary (`cmd/gitness`), REST API handlers organized by resource (repos, pull requests, spaces, pipelines, gitspaces, registries), and a CLI for administrative tasks. The architecture follows a layered pattern: HTTP handlers → controllers → services → stores, with an event-driven subsystem for asynchronous processing (pull requests, checks, gitspace lifecycle, merge queues). External dependencies include Drone runner libraries for pipeline execution, Docker API for container orchestration, and cloud provider SDKs (AWS, GCP) for infrastructure provisioning. The artifact registry is based on a fork of Harbor and supports OCI, Maven, npm, NuGet, Python, Helm, RPM, and other package formats. The frontend is modular, with separate codebases for the core Git UI, artifact registry (AR), and CDE (Gitspaces), using Harness UI components and custom factories for extensible package-type rendering.