Ctxlint

You know those CLAUDE.md and AGENTS.md files everyone's adding to their repos to give AI context about their codebase? This lints them against your actual source code to catch outdated references, broken file paths, and documentation drift. It's a stdio server that scans your context documentation and validates it matches reality. Reach for this when you're maintaining agent context files across a team or just want to stop telling Claude about code structures that changed three refactors ago. Prevents the classic problem where your AI context confidently points to files and patterns that no longer exist.