Create HF_REVIEWER_NOTE.md

HF_REVIEWER_NOTE.md

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+# Hugging Face Reviewer Cover Note
+
+## Summary
+This Space provides a **federated, link-out discovery interface** for public U.S. Government FOIA Electronic Reading Rooms.
+
+It **does not scrape, crawl, mirror, or redistribute documents**.
+
+## Safety Highlights
+- Link-out only to official government domains
+- No document storage
+- No personal data collection
+- Stateless execution
+- AI analysis is **explicit opt-in**
+- PDF processing occurs **only on user request**
+
+## AI Controls
+- Disabled by default
+- User must select a document
+- User must opt in
+- AI outputs include:
+  - Disclosure footer
+  - Integrity hash
+  - Source URL
+
+## Compliance
+This Space complies with:
+- Hugging Face platform policies
+- FOIA public-domain standards
+- Fair-use research practices
+
+Thank you for your review.