diff --git a/src/idea34_openpassmarket_privacy_preserving/registry.py b/src/idea34_openpassmarket_privacy_preserving/registry.py
index 64671e5..1a65c0f 100644
--- a/src/idea34_openpassmarket_privacy_preserving/registry.py
+++ b/src/idea34_openpassmarket_privacy_preserving/registry.py
@@ -15,3 +15,18 @@ class RegistryWrapper:
 
     def get(self, adapter_id: str) -> Optional[Dict[str, str]]:
         return self.graph.get_info(adapter_id)
+
+    def conforms(self, adapter_id: str, required_keys: Optional[list] = None) -> bool:
+        """Check whether a registered adapter advert contains the required keys.
+
+        This is a lightweight conformance helper used by registries and tests to
+        ensure adapters expose the minimal advertised metadata. It does not
+        validate types beyond presence.
+        """
+        info = self.get(adapter_id)
+        if info is None:
+            return False
+        if not required_keys:
+            # If no keys specified, consider presence in registry as conformance
+            return True
+        return all(k in info for k in required_keys)
diff --git a/tests/test_core.py b/tests/test_core.py
index dcc57a2..ab674ab 100644
--- a/tests/test_core.py
+++ b/tests/test_core.py
@@ -10,6 +10,7 @@ if SRC not in sys.path:
 
 from idea34_openpassmarket_privacy_preserving.core import LocalProblem, PerformanceSignal, PrivacyBudget, aggregate_signals
 from idea34_openpassmarket_privacy_preserving import PassSpec, verify_invariants
+from idea34_openpassmarket_privacy_preserving.registry import RegistryWrapper
 
 
 def test_privacy_budget_consume():
@@ -53,3 +54,25 @@ def test_verify_invariants_valid_and_invalid():
         constraints={},
     )
     assert verify_invariants(lp_bad, spec, budget) is False
+
+
+def test_registry_register_and_conformance():
+    reg = RegistryWrapper()
+    adapter_id = "adapter_foo"
+    info = {
+        "supported_languages": "Python, C",
+        "contract_version": "v1",
+        "supported_features": "pass_spec,performance_signal",
+    }
+    # Register and retrieve
+    reg.register(adapter_id, info)
+    got = reg.get(adapter_id)
+    assert got is not None
+    assert got.get("contract_version") == "v1"
+
+    # Conformance checks
+    assert reg.conforms(adapter_id, required_keys=["supported_languages", "contract_version"]) is True
+    # Missing key should fail
+    assert reg.conforms(adapter_id, required_keys=["nonexistent_key"]) is False
+    # Non-registered adapter should return False
+    assert reg.conforms("no_such_adapter") is False