The hook source `docs/hooks/llms_txt.py` lives inside the default `docs_dir`, and since `mkdocs.yml` sets no `exclude_docs`, MkDocs copies it verbatim into the built site, publishing it at `/hooks/llms_txt.py` as a stray static asset. Harmless, but easy to avoid by adding `exclude_docs: hooks/` or moving the hook outside `docs/` — note the same layout exists on main from #3024, so any cleanup should land on both branches to preserve parity.