Rust engine turns code into C4 architecture wikis

What it does

Litho ingests a source repository, analyzes code structure and dependencies across several languages, and emits a comprehensive wiki. It follows the C4 model, producing context, container, component, and code-level documentation with embedded Mermaid diagrams. The goal is to eliminate manually maintained architecture docs that drift out of sync with the code.

The interesting bit

The tool runs a four-stage pipeline—preprocessing, research, generation, and verification—that treats documentation as a build artifact rather than a chore. It can also mount external knowledge like PDFs or SQL schemas to enrich its analysis, and it tracks architectural evolution through Git history.

Key highlights

• Outputs C4-model diagrams (Context, Container, Component, Code) automatically.
• Supports Rust, Python, Java, Go, C#, JavaScript, and others.
• Ingests external documents—PDFs, Markdown, SQL—as supplemental knowledge sources.
• Ships alongside companion tools: Litho Book for browsing output and Mermaid Fixer for diagram syntax repair.
• Built for CI/CD integration to regenerate docs on every commit.

Verdict

Development teams managing large or polyglot repositories that need current architecture overviews will find this useful. If your project is small or your documentation is already exhaustive, it is likely unnecessary.