Read-only analysis skill that finds broken [[wiki-links]] by extracting link targets from all markdown files and verifying each target file exists via Glob. Groups broken links by source file and suggests close matches for misspelled targets. Handles edge cases: heading anchors, block references, aliases, embedded images, template placeholders, and external links. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>