docs: add AI Gatekeeper Protocol availability note

Added note to STATE.scm about the new AI Gatekeeper Protocol system
(0-AI-MANIFEST.a2ml) that prevents context loss and duplicate file
creation across AI sessions.

Reference: https://github.com/hyperpolymath/0-ai-gatekeeper-protocol

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

Author: Jonathan D.A. Jewell

.machine_readable/STATE.scm

@@ -219,9 +219,18 @@
         (severity . low)
         (description . "Original migration concern from 2025. Most repos now active on GitHub.")))))
 
+    (notes
+     ((ai-gatekeeper-protocol
+       ((date-added . "2026-02-07")
+        (title . "AI Gatekeeper Protocol Now Available")
+        (description . "Universal manifest system (0-AI-MANIFEST.a2ml) now available for preventing context loss and duplicate file creation across AI sessions. See https://github.com/hyperpolymath/0-ai-gatekeeper-protocol for details.")
+        (impact . "All hyperpolymath repos will automatically include manifest via rsr-template-repo. Enforcement via MCP server (Claude) and FUSE wrapper (universal).")
+        (action-required . "Add 0-AI-MANIFEST.a2ml to this repo when convenient - template available in rsr-template-repo")))))
+
     (history
      ((velocity
-       ((2026-02-06 . ((tasks-completed . 11) (focus . "state-file-audit-and-update")))
+       ((2026-02-07 . ((tasks-completed . 1) (focus . "ai-gatekeeper-protocol-note")))
+        (2026-02-06 . ((tasks-completed . 11) (focus . "state-file-audit-and-update")))
         (2025-12-28 . ((tasks-completed . 15) (files-created . 28)))
         (2025-12-16 . ((tasks-completed . 5) (focus . "migration-planning")))
         (2025-10-01 . ((tasks-completed . 10) (focus . "initial-design")))))))))