[fnayou]

Summary

 check_site
+  reject root-absolute links outside the GitHub Pages base path
+  accept controls wrapped by an implicit <label>
+CONTRIBUTING.md
+  state the Python 3.11+ requirement for tomllib

Adds regressions for the Pages subpath and implicit-label cases. Documents the checker’s Python minimum.

Closes #34

Evidence

• Before: / and /assets/site.css could pass against existing root files even when Pages serves the site under /ffmpegfyMe; a wrapped input without an id failed accessibility checks.
• After: 10 checker tests pass. Strict Zensical build and generated-site checks pass for 8 pages. task docs:check passes.

Merge Danger

Door: Two-way

Blast Radius: Docs

Revert the PR to restore the previous checker behavior and contributor guidance.