diff --git a/tests/test_full_stack_contract.py b/tests/test_full_stack_contract.py
new file mode 100644
index 0000000..f6a0dd4
--- /dev/null
+++ b/tests/test_full_stack_contract.py
@@ -0,0 +1,30 @@
+from pathlib import Path
+
+from a2a_pack.cli.local import load_local_project
+
+
+ROOT = Path(__file__).resolve().parents[1]
+
+
+def test_full_stack_product_contract():
+    manifest = (ROOT / "a2a.yaml").read_text(encoding="utf-8")
+    source = (ROOT / "agent.py").read_text(encoding="utf-8")
+    frontend = (ROOT / "frontend" / "src" / "App.jsx").read_text(encoding="utf-8")
+    frontend_client = (ROOT / "frontend" / "src" / "a2a.js").read_text(encoding="utf-8")
+
+    assert "frontend:" in manifest and "mount: /app" in manifest
+    assert "resources:" in manifest and "databases:" in manifest
+    assert "migrations:" in manifest and "db/migrations" in manifest
+    assert "PlatformUserAuth" in source
+    assert "AgentPlatformResources" in source and "AgentDatabase(" in source
+    assert "Skill runner" not in frontend, "replace the generic scaffold with the product workflow"
+    assert "unwrapInvokeResponse" in frontend_client, "unwrap the /invoke result envelope before rendering"
+
+    migrations = list((ROOT / "db" / "migrations").glob("*.sql"))
+    assert migrations and all(path.read_text(encoding="utf-8").strip() for path in migrations)
+
+    card = load_local_project(ROOT).agent_cls().card()
+    databases = card.runtime.platform_resources.databases
+    assert databases, "live Agent Card must declare its managed database"
+    assert databases[0].migrations is not None
+    assert databases[0].migrations.path == "db/migrations"