feat: compile Light Arrival collective cognition

Final recovered Fifth Domain upgrade segment. Applies the Light Arrival collective cognition correction from local source commit 7390a35 without rewriting remote history.

skills/codex/guanghu-persona-skill-guard/scripts/test_compile_collective_cognition.py

@@ -0,0 +1,49 @@
+import unittest
+
+from compile_collective_cognition import (
+    compile_graph,
+    load_contributions,
+)
+
+
+class CollectiveCognitionCompilerTests(unittest.TestCase):
+    def test_repository_contributions_compile_without_authority(self):
+        result = compile_graph(load_contributions())
+        self.assertGreaterEqual(result["contribution_count"], 1)
+        self.assertGreater(result["node_count"], 1)
+        self.assertFalse(result["execution_authority"])
+        self.assertTrue(result["correction_edges"])
+
+    def test_unknown_parent_fails_closed(self):
+        contribution = load_contributions()[0]
+        broken = {
+            **contribution,
+            "nodes": [
+                *contribution["nodes"],
+                {
+                    "id": "BROKEN",
+                    "kind": "decision",
+                    "statement": "broken",
+                    "parents": ["MISSING"],
+                    "evidence": [],
+                    "state": "pending",
+                },
+            ],
+        }
+        with self.assertRaises(ValueError):
+            compile_graph([broken])
+
+    def test_cycles_fail_closed(self):
+        contribution = load_contributions()[0]
+        first = contribution["nodes"][0]["id"]
+        last = contribution["nodes"][-1]["id"]
+        cyclic_nodes = [
+            {**node, "parents": [last]} if node["id"] == first else node
+            for node in contribution["nodes"]
+        ]
+        with self.assertRaises(ValueError):
+            compile_graph([{**contribution, "nodes": cyclic_nodes}])
+
+
+if __name__ == "__main__":
+    unittest.main()