Cross-Reference Test

Smoke test for the cross-document reference channels. Each bullet exercises one channel into one peer document and must render as a link. doc-check checks this page (xref_smoketest: in doc/documents.yaml) and fails the build if a bullet comes out as plain text. The page is part of the test specification, so it builds with and without the test report.

Intersphinx — other Sphinx documents

External needs — sphinx-needs imports