diff --git a/tests/governance/test_module_spec.py b/tests/governance/test_module_spec.py
new file mode 100644
index 0000000..e101743
--- /dev/null
+++ b/tests/governance/test_module_spec.py
@@ -0,0 +1,32 @@
+from __future__ import annotations
+
+import json
+import unittest
+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parents[2]
+
+
+class ModuleSpecTests(unittest.TestCase):
+    def test_module_spec_declares_pure_research_engine_boundary(self) -> None:
+        spec = json.loads((ROOT / "MODULE_SPEC.yaml").read_text(encoding="utf-8"))
+        self.assertEqual(spec["module_id"], "quant_engine")
+        self.assertEqual(spec["authority"]["subject"], spec["module_id"])
+        self.assertEqual(spec["repository"]["type"], "research_engine")
+        self.assertEqual(spec["bounded_context"]["domain"], "quantitative-research-engine")
+        prohibited = " ".join(spec["bounded_context"]["prohibited_responsibilities"]).lower()
+        for term in ("investment advice", "live order", "credentials", "source facts"):
+            self.assertIn(term, prohibited)
+        self.assertEqual(spec["contracts"], {"provides": [], "consumes": []})
+        self.assertEqual(spec["dependencies"], [])
+        self.assertTrue(
+            all(
+                command["required"] and not command["network"]
+                for command in spec["verification"]["commands"]
+            )
+        )
+
+
+if __name__ == "__main__":
+    unittest.main()