Add interaction capability policy docs

tests/test_public_private_split.py

@@ -0,0 +1,30 @@
+from pathlib import Path
+import unittest
+
+
+ROOT = Path(__file__).resolve().parents[1]
+PRIVATE_TARGET_TERMS = (
+    "wowrace",
+    "wowngeon",
+    "smirk-monorepo",
+    "medusa-multi-tenant-platform",
+    "ai-gen-bot",
+)
+
+
+class PublicPrivateSplitTest(unittest.TestCase):
+    def test_private_target_names_do_not_appear_in_public_docs(self):
+        failures = []
+        for path in sorted((ROOT / "docs").rglob("*.md")):
+            rel = path.relative_to(ROOT)
+            if "private" in rel.parts:
+                continue
+            text = path.read_text(encoding="utf-8").lower()
+            for term in PRIVATE_TARGET_TERMS:
+                if term in text:
+                    failures.append(f"{rel}: contains private target term {term!r}")
+        self.assertEqual([], failures)
+
+
+if __name__ == "__main__":
+    unittest.main()