diff --git a/scripts/verify_multiplayer_local.sh b/scripts/verify_multiplayer_local.sh
index aa5bd7d2..d4adfa18 100755
--- a/scripts/verify_multiplayer_local.sh
+++ b/scripts/verify_multiplayer_local.sh
@@ -50,12 +50,21 @@ run_godot_harness
 
 echo "local multiplayer gate: contracts and manifests"
 python3 -m json.tool "$root_dir/server/contracts/v1/openapi.json" >/dev/null
+# json.tool only proves the contract parses. test_contracts.py is what actually
+# checks the operation IDs, envelopes and state vocabulary generated clients
+# bind to; it was previously not run by any target, so a real mismatch between
+# openapi.json and the suite sat undetected.
+python3 "$root_dir/server/contracts/v1/test_contracts.py"
 python3 "$root_dir/server/migrations/test_migration.py"
 python3 "$root_dir/server/security/test_fleet_manifests.py"
 python3 "$root_dir/server/security/test_compose_manifests.py"
 python3 "$root_dir/server/security/test_kubernetes_policies.py"
 python3 "$root_dir/server/security/test_supply_chain.py"
+python3 "$root_dir/server/security/test_threat_model.py"
 python3 "$root_dir/scripts/verify_observability_manifests.py"
+# The checker above validates the checked-in manifests; this validates the
+# checker itself still rejects a widened scrape scope.
+python3 "$root_dir/server/security/test_observability_manifests.py"
 python3 -m unittest "$root_dir/scripts/test_verify_agones_allocation_response.py"
 
 echo "LOCAL MULTIPLAYER GATE PASS"
diff --git a/server/contracts/v1/test_contracts.py b/server/contracts/v1/test_contracts.py
index fbfbe9be..cb172160 100644
--- a/server/contracts/v1/test_contracts.py
+++ b/server/contracts/v1/test_contracts.py
@@ -23,12 +23,17 @@ class ContractTest(unittest.TestCase):
             for operation in path.values()
             if isinstance(operation, dict) and "operationId" in operation
         }
-        self.assertTrue({
+        # These are the operation IDs generated clients bind to, so a rename
+        # here is a breaking change for every consumer. Assert the difference
+        # rather than a bare subset check: a plain assertTrue reports only
+        # "False is not true" and hides which operation went missing.
+        required = {
             "createSteamSession", "getProfile", "createQueueTicket",
             "heartbeatQueueTicket", "cancelQueueTicket", "acceptProposal",
             "declineProposal", "getAssignment", "registerServer",
-            "recordPlayerConnected", "submitMatchResult", "getRankedProfile",
-        } <= operations)
+            "claimPlayerConnection", "submitMatchResult", "getRankedProfile",
+        }
+        self.assertEqual(set(), required - operations)
 
     def test_ranked_profile_contract_is_authoritative_and_optional_season_metadata(self):
         schema = self.openapi["components"]["schemas"]["RankedProfile"]
diff --git a/server/security/test_observability_manifests.py b/server/security/test_observability_manifests.py
index efe3551a..e5955253 100644
--- a/server/security/test_observability_manifests.py
+++ b/server/security/test_observability_manifests.py
@@ -20,17 +20,50 @@ class ObservabilityManifestTest(unittest.TestCase):
         result = self.run_checker()
         self.assertEqual(result.returncode, 0, result.stderr)
 
-    def test_checker_rejects_wrong_namespace_and_broad_scrape(self):
+    # Every file the checker opens, in the order it opens them. Copying only a
+    # subset makes it die on a missing file before it reaches the assertion
+    # under test, so the mutation is never actually exercised.
+    FIXTURE = (
+        "kustomization.yaml",
+        "prometheus-service-monitor.yaml",
+        "prometheus-allocator-service-monitor.yaml",
+        "prometheus-rules.yaml",
+    )
+
+    def build_fixture(self, target, mutate=None):
+        for name in self.FIXTURE:
+            text = (ROOT / "deploy/observability" / name).read_text()
+            if mutate is not None and name == "prometheus-service-monitor.yaml":
+                text = mutate(text)
+            (target / name).write_text(text)
+
+    def test_unmutated_fixture_copy_passes(self):
+        # Guards the two mutation tests below: if this fails, their non-zero
+        # exit proves nothing, because the fixture itself is broken.
         with tempfile.TemporaryDirectory() as directory:
             target = Path(directory)
-            for name in ("prometheus-service-monitor.yaml", "prometheus-rules.yaml"):
-                (target / name).write_text((ROOT / "deploy/observability" / name).read_text())
-            monitor = target / "prometheus-service-monitor.yaml"
-            monitor.write_text(monitor.read_text().replace("path: /metrics", "path: /").replace("- cosmic-clash", "- default"))
+            self.build_fixture(target)
+            result = self.run_checker(target)
+            self.assertEqual(result.returncode, 0, result.stderr)
+
+    def test_checker_rejects_wrong_namespace(self):
+        with tempfile.TemporaryDirectory() as directory:
+            target = Path(directory)
+            # Widen the namespaceSelector only; metadata.namespace stays put so
+            # this isolates the scrape-scope check from the placement check.
+            self.build_fixture(target, lambda text: text.replace("      - cosmic-clash", "      - default"))
             result = self.run_checker(target)
             self.assertNotEqual(result.returncode, 0)
             self.assertIn("namespace", result.stderr)
 
+    def test_checker_rejects_broad_scrape_path(self):
+        with tempfile.TemporaryDirectory() as directory:
+            target = Path(directory)
+            self.build_fixture(target, lambda text: text.replace("      path: /metrics", "      path: /"))
+            result = self.run_checker(target)
+            self.assertNotEqual(result.returncode, 0)
+            self.assertIn("path", result.stderr)
+
 
 if __name__ == "__main__":
     unittest.main()