Catch broken links & dead anchors in Markdown/HTML docs — relative links, GitHub-slug #anchors, cross-file anchors, images, references. Deterministic, offline, runs in CI. A fast internal-integrity link checker.

Fixie is an autonomous dead link fixer for GitHub repositories. It scans markdown files within a repository, identifies broken hyperlinks, replaces them with active snapshots from the Wayback Machine (Archive.org), and automatically opens a pull request with the fixes.