Google Cloud launches Code Wiki to keep repo documentation current
NOV. 13, 2025 — Google Cloud introduced Code Wiki, a system that generates and maintains a structured, continuously updated wiki for code repositories. The public preview of the Code Wiki website ingests public repositories and produces interactive documentation that is regenerated after each change to the codebase.
What Code Wiki provides
Code Wiki aims to reduce time spent reading and deciphering code by converting repository contents into an always-current, navigable knowledge base. Key capabilities highlighted in the announcement include:
- Continuously updated, structured wiki: the system scans the full codebase and regenerates documentation after changes, keeping text and diagrams aligned with the current code state.
- Integrated, context-aware chat: a Gemini-powered chat agent uses the live wiki as its knowledge base, enabling repository-specific Q&A that relies on the latest documentation.
- Hyperlinked, actionable docs: every wiki section and chat response links directly to the relevant files, classes, and function definitions to streamline exploration and code navigation.
- Auto-generated diagrams: architecture, class, and sequence diagrams are produced automatically and kept in sync with code changes to aid visualization of complex relationships.
Public preview website
The Code Wiki site is in public preview and focuses on public open-source repositories. Documentation is presented interactively, allowing movement from high-level explanations down to exact code locations. The integrated chat draws its context from the live wiki rather than a generic model, which is intended to provide more precise answers about a repository’s structure and behavior.
Visit the public preview at [http://codewiki.google/?utm_source=blog&utm_medium=gfd&utm_campaign=launch_post](http://codewiki.google/?utm_source=blog&utm_medium=gfd&utm_campaign=launch_post.
Gemini CLI extension for private and internal repos
Google Cloud plans a Gemini CLI extension for Code Wiki so teams can run the same system locally on private repositories. The extension is positioned as a solution for internal codebases where documentation gaps and absent original authors make comprehension difficult. A waitlist is available for teams interested in the CLI extension: [https://developers.google.com/profile/badges/community/sdlcagents/gca-agents](https://developers.google.com/profile/badges/community/sdlcagents/gca-agents. More information about extensions is referenced at [http://geminicli.com/extensions](http://geminicli.com/extensions.
What this means for development workflows
By automating documentation generation and tying conversational assistance directly to an up-to-date knowledge base, Code Wiki targets a common friction point in software maintenance and onboarding. The approach blends static documentation, code navigation, and diagram generation into a single, synchronized workflow, which may shorten ramp-up time for contributors and speed understanding of unfamiliar libraries.
Full announcement: https://developers.googleblog.com/en/introducing-code-wiki-accelerating-your-code-understanding/?
