LemonBeam Launches Open-Source Tool to Generate Verified GitHub Onboarding Guides

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LemonBeam, an open-source tool built by Kanami Anderson, John DeLong, and Tanisha Thompson-Jones, has launched to help developers navigate unfamiliar codebases by generating onboarding guides with verifiable citations. The tool scans a public GitHub repository at a specific commit, uses Tree-sitter to parse and filter code, and produces a structured guide across six standard sections including setup, testing, and known uncertainties. Every citation in the guide is automatically validated against the source evidence, and any unverifiable claims are removed or flagged rather than presented as fact. LemonBeam is available as a web app, a CLI tool, and an MCP server compatible with AI assistants like Claude Code, and requires only an OpenRouter API key to use. The project is MIT-licensed, stores no data, and costs approximately 2 cents per guide after an early pipeline fix reduced per-guide costs from around 70 cents.

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