docs: SR 26-2 replaces SR 11-7 (sc-16033)

[nrichers]

What and why?

Updates the docs site for SR 26-2, the April 2026 interagency guidance that supersedes SR 11-7. Adds site/about/use-cases/sr-26-2.qmd with a legacy URL alias, removes sr-11-7.qmd, and refreshes the MRM overview, glossary model definition, navigation, training tiles, cross-links, style-guide example, release copy, document-checker template, ongoing monitoring intro, and the embedded agentic AI notebook closing paragraph (SR 26-2 nuance for GenAI/agentic scope).

How to test

After the PR preview deploys, spot-check:

• SR 26-2 use case
• Legacy SR 11-7 URL redirects
• Model risk management
• MRM overview (dropped from sidebar in What could docs & training for AI governance look like? #1087)
• Homepage

Local: quarto preview from site/ if you prefer.

What needs special review?

• Wording for SR 26-2 model definition vs. regulatory text in glossary and overview.
• Training slide bubbles and compliance table links.

Dependencies, breaking changes, and deployment notes

None. External links use the official SR 26-2 letter URL.

Release notes

Documentation now reflects SR 26-2 as the current U.S. interagency MRM guidance and supersedes SR 11-7 across use cases, training references, and related pages.

Checklist

• What and why
• How to test
• What needs special review
• Dependencies, breaking changes, and deployment notes
• Labels applied
• PR linked to Shortcut
• Documentation updated (if required)
• Tested locally

[github-actions]

Pull requests must include at least one of the required labels: internal (no release notes required), highlight, enhancement, bug, deprecation, documentation. Except for internal, pull requests must also include a description in the release notes section.

[github-actions]

PR Summary

This PR updates the documentation and related pages by replacing references to the outdated SR 11-7 regulation with the new SR 26-2 guidance. The changes span multiple files including configuration files (like _quarto.yml), style guides, overview and use-case pages, glossary definitions, and training materials. In addition to updating the regulation label, the PR revises the related descriptive text to reflect the new regulatory requirements and supersession details for SR 26-2. Links, internal navigation, and button labels have also been updated to point to the corresponding SR 26-2 implementation guide and regulatory links. Overall, the functional change improves the accuracy of regulatory compliance documentation and aligns the content with the latest guidance from U.S. supervisory authorities.

Test Suggestions

• Verify that all pages and links previously referencing SR 11-7 now display SR 26-2 with correct descriptions and links.
• Check that the navigation and button labels correctly point to the new SR 26-2 implementation guide.
• Perform a manual review of the updated pages to ensure text consistency and that no outdated references remain.
• Test the documentation search functionality to ensure that queries for SR 26-2 return the correct results.

[github-actions]

Validate docs site

✓ INFO: A live preview of the docs site is available — Open the preview

[github-actions]

Lighthouse check results

⚠️ WARN: Average accessibility score is 0.87 (required: >0.9) — Check the workflow run

Show Lighthouse scores

Folder depth level checked: 0

Commit SHA: fa82bdb

Modify the workflow to check a different depth:

• 0: Top-level navigation only — /index.html, /guide/guides.html, ...
• 1: All first-level subdirectories — /guide/.html, /developer/.html, ...
• 2: All second-level subdirectories — /guide/attestation/*.html, ...

Page	Accessibility	Performance	Best Practices	SEO
/developer/validmind-library.html	0.85	0.68	1.00	0.82
/get-started/get-started.html	0.85	0.71	1.00	0.73
/guide/guides.html	0.85	0.69	1.00	0.82
/index.html	0.93	0.68	1.00	0.82
/releases/all-releases.html	0.86	0.69	1.00	0.73
/support/support.html	0.91	0.68	1.00	0.82
/training/training.html	0.85	0.66	0.96	0.73