## Description
Adds a check that validates all `@[ref]` cross-references in source
MDX/MD files resolve against entries in `link_map.py`. Previously,
unresolved references silently passed through the build pipeline and
appeared as raw `@[ClassName]` text in the published docs. Available via
`make check-cross-refs`.
Note: I couldn't modify `.github/workflows/_check-links.yml` due to
workflow permissions. To integrate into CI, add this step to
`_check-links.yml` after "Install Python dependencies":
```yaml
- name: Check for unresolved cross-references
run: make check-cross-refs
```
## Test Plan
- [ ] `make check-cross-refs` reports unresolved references with file,
line number, and scope
- [ ] 12 unit tests covering: valid refs, unresolved refs, scope fences,
code block skipping, escaped refs, titled refs, backtick refs, and
code-samples exclusion
---------
Co-authored-by: open-swe[bot] <open-swe@users.noreply.github.com>
Co-authored-by: Naomi Pentrel <5212232+npentrel@users.noreply.github.com>
Mason Daugherty