docvault: Generate Local API Docs to Reduce AI Hallucinations

What docvault does

docvault addresses the problem of LLMs like Claude confidently providing incorrect function signatures by generating local, up-to-date API documentation directly from source code. The tool creates markdown files that stay in your repository, providing a reliable reference point for AI coding assistants.

Technical implementation

The tool works for Rust crates and Python packages using runtime introspection. It generates a two-tier markdown file structure:

• Curated patterns and gotchas at the top
• Full machine-generated API reference at the bottom

Re-running the script updates the API reference while preserving your curated notes. The scripts are pure Python stdlib with zero dependencies, available for standalone use.

Claude Code integration

Install the plugin with these commands:

/plugin marketplace add zeapo/docvault

/plugin install vendored-docs@docvault

Once installed, you can use natural language commands like:

vendor the doc for kube

After documentation is vendored, Claude checks these local docs before searching the internet, reducing hallucinations. You can also ask Claude to compare your implementation against the vendored documentation:

compare our usage of kube with the vendored doc

This type of tool is useful for developers working with complex libraries where AI assistants frequently hallucinate API details, particularly in Rust and Python ecosystems where API signatures are critical for correct implementation.