docs: add AI Gatekeeper Protocol notes and foundations status

Added notes to STATE.scm:
- AI Gatekeeper Protocol availability (natural synergy with ochrance's
  A2ML parser - both use A2ML format)
- Foundations laid: 54% complete, A2ML parsing pipeline functional
- Next steps: Complete validator, serializer, integrate BLAKE3

References:
- https://github.com/hyperpolymath/0-ai-gatekeeper-protocol
- https://github.com/hyperpolymath/mcp-repo-guardian
- https://github.com/hyperpolymath/repo-guardian-fs

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: Jonathan D.A. Jewell

STATE.scm

@@ -92,6 +92,27 @@
         "Build libechidna.so and integrate FFI"
         "Begin Phase 2: Echidna Integration")))
 
+    (notes
+     ((ai-gatekeeper-protocol
+       ((date . "2026-02-07")
+        (status . "available")
+        (title . "AI Gatekeeper Protocol Now Available")
+        (description . "Universal manifest system (0-AI-MANIFEST.a2ml) completed. This provides mechanical enforcement for preventing context loss and duplicate files across AI sessions.")
+        (relevance . "Ochránce implements A2ML parsing - the gatekeeper protocol uses A2ML format for manifests. Natural synergy between projects.")
+        (repos
+          ("https://github.com/hyperpolymath/0-ai-gatekeeper-protocol" "Documentation and specification")
+          ("https://github.com/hyperpolymath/mcp-repo-guardian" "MCP server with hard enforcement")
+          ("https://github.com/hyperpolymath/repo-guardian-fs" "FUSE wrapper for universal enforcement"))
+        (next-steps . "Ochránce's A2ML parser could be used for manifest validation. Consider integration when Phase 1 complete.")))
+
+     (foundations-laid
+       ((date . "2026-02-06")
+        (status . "phase-1-in-progress")
+        (completion . 54)
+        (summary . "A2ML parsing pipeline fully functional. Type-safe framework with error taxonomy complete. Merkle tree and filesystem verification need completion.")
+        (immediate-next . "Complete A2ML Validator, implement Serializer, replace Merkle tree XOR with BLAKE3")))))
+
     (session-history
-      (("2026-02-06" "opus" "Initial repo creation from rsr-template-repo. Renamed to ochrance. GitHub repo created and starred. Set up project structure for neurosymbolic filesystem verification.")
+      (("2026-02-07" "sonnet" "Added notes about AI Gatekeeper Protocol availability and project foundations status. Ochránce at 54% completion with A2ML parser complete - natural synergy with gatekeeper protocol which uses A2ML format.")
+       ("2026-02-06" "opus" "Initial repo creation from rsr-template-repo. Renamed to ochrance. GitHub repo created and starred. Set up project structure for neurosymbolic filesystem verification.")
        ("2026-02-06" "opus" "Implemented complete A2ML Parser with covering totality. Parser supports all A2ML sections: @manifest, @refs, @attestation, @policy. Includes field parsing, optional sections, and comprehensive error reporting. Overall progress: 0% -> 54%.")))))