Fix the Facebook crawler spider trap by disabling Quartz SPA mode and
removing the nginx fallback to index.html. Non-existent URLs now return
404.html instead of the root SPA shell, preventing infinite recursive
crawling.
Remove hand-curated category index files (tutorials.md, reference.md,
how-to.md, explanation.md) — Quartz auto-generates folder pages. Drop
docs-check-index and docs-check-filenames hooks. Update docs-check-links
to allow path-based wiki-links and only error on true ambiguity. Remove
robots.txt exclusions since they're no longer needed.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
