Fossil MCP
Dead code detection for vibe-coded projects
What it does
AI coding tools write fast but never clean up. After a few sessions your project is full of dead functions, duplicated logic, and Phase 2 comments. Fossil scans your codebase and finds what's dead. Not grep — actual call graph analysis across 15 languages. It's also an MCP server. Connect it once and your AI agent can clean up after itself. Written in Rust. Single binary. Zero config. Open source.
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We built a reference MCP server that lets your editor/agent learn a codebase directly from source (signatures, types, AST, comments). Docs are optional. The reference impl runs on our open-source project’s codebase. Why we built it Docs are important, but they add another abstraction layer between your code and your users. Keeping them at the right quality is hard (especially at a startup), and LLM-generated docs are often mediocre until you invest real polish. Exposing code to the model in a structured way keeps answers grounded and current, and it’s always available. You can even…
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