CodeBoarding

CodeBoarding is an open-source tool that gives developers and coding agents a visual map of any codebase. It combines static analysis with LLM reasoning to produce architecture diagrams, component-level documentation, and navigable outputs usable in IDEs, CI pipelines, and docs. The project is MIT-licensed, actively maintained on GitHub, and available as a CLI, VS Code extension, and GitHub Action.

What It Is

CodeBoarding sits in the "understand" and "validate" phases of the AI development workflow. It parses a repository using language server protocol (LSP) clients and static analysis, then passes structured results to an LLM agent that generates high-level system architecture diagrams, deeper component diagrams for important subsystems, and Markdown documentation written to a .codeboarding/ directory. The output is Mermaid-formatted, making it easy to embed in pull requests and docs. The tool is designed to keep humans and AI coding agents aligned with the real architecture as code evolves.

Architecture and How It Works

CodeBoarding's internal pipeline has six main components:

• Application Orchestrator & Repository Manager — initiates the analysis workflow and detects code changes for incremental updates
• Incremental Analysis Engine — requests static analysis only for new or changed code segments, caching results
• Static Code Analyzer — performs deep code parsing and structural analysis using LSP
• LLM Agent Core — receives project context and drives the main analysis workflow
• Agent Tooling Interface — lets the LLM agent invoke specialized tools to query the static analysis engine
• Documentation & Diagram Generator — converts LLM agent insights into Mermaid diagrams and Markdown docs

Supported languages include Python, TypeScript, JavaScript, Java, Go, PHP, Rust, and C#. Supported LLM providers include OpenAI, Anthropic, Google, Vercel AI Gateway, AWS Bedrock, Ollama, OpenRouter, and LiteLLM proxy.

Where It Fits in the Stack

CodeBoarding is available in four deployment surfaces:

• CLI (codeboarding via pipx or pip) for local analysis, automation, and CI workflows
• VS Code Extension (also available on OpenVSX for Cursor and Windsurf) for in-editor visual architecture
• GitHub Action to keep diagrams updated automatically in CI
• Hosted diagram explorer at codeboarding.org/diagrams for browsing generated examples

The same shared system map is accessible across all surfaces, so every teammate and every agent starts from the same source of truth.

Update: v0.12.2

The latest release is v0.12.2, published June 13, 2026. The GitHub repository was created in April 2025 and has been actively pushed to as recently as June 2026. The homepage footer lists the current stable version as v0.9.2, while the GitHub release page shows v0.12.2 as the latest tag, indicating rapid iteration. The project lists itself as "Actively Maintained" and "Open Source" on the homepage.

Open-Source Adoption Signal

The GitHub repository reports 2,279 stars and 188 forks as of mid-2026. The homepage lists open-source repositories from organizations including Pfizer, Atlassian, RatchLab, SerEngil (DeepFace), Recursion Pharma, 2noise (ChatTTS), and LastMile AI as projects where CodeBoarding-generated documentation has been applied — these are vendor-published claims on the homepage. The project states it has visualized over 800 open-source repositories, with generated examples browsable in the GeneratedOnBoardings GitHub organization.