Check reviewer markdown link integrity

[stacknil]

Summary

• Adds a local Markdown link integrity regression test for README, docs, and demo README files
• Checks repository-relative links and image paths without requiring network access
• Protects reviewer navigation surfaces from broken local links during consolidation

Validation

• pytest tests/test_markdown_links.py --basetemp .pytest-artifacts-markdown-links
• pytest --basetemp .pytest-artifacts-full-20260531-1
• git diff --cached --check

[chatgpt-codex-connector]

💡 Codex Review

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Reviewed commit: 97aefb6992

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[chatgpt-codex-connector]

Include nested docs in link check

The repo already contains Markdown files below nested docs/ directories, such as docs/reviewer-pack-v0.4.0/MANIFEST.md and docs/reviewer-pack-v0.6.0/MANIFEST.md, but this helper only collects top-level docs/*.md. Any local link added to those reviewer-pack manifests can break without this regression test failing, which leaves part of the documented reviewer surface outside the new integrity check; use a recursive docs scan if the test is meant to cover docs broadly.

Useful? React with 👍 / 👎.

[stacknil]

Addressed the Codex review feedback in 7479bb8 by changing the Markdown link collector to scan nested docs and demo Markdown recursively. Local validation: pytest tests/test_markdown_links.py --basetemp .pytest-artifacts-markdown-links-v2 and pytest --basetemp .pytest-artifacts-full-20260531-2.