diff --git a/tests/test_full_stack_contract.py b/tests/test_full_stack_contract.py
index 59cee34..27eb4a0 100644
--- a/tests/test_full_stack_contract.py
+++ b/tests/test_full_stack_contract.py
@@ -1,7 +1,14 @@
+import os
 from pathlib import Path
 
+import pytest
+
+from a2a_pack import PlatformUserAuth
 from a2a_pack.cli.local import load_local_project
 
+import agent as agent_module
+from agent import GeneratesSvgVideoGame9jg9vdF0f510
+
 
 ROOT = Path(__file__).resolve().parents[1]
 
@@ -12,17 +19,86 @@ def test_full_stack_product_contract():
     frontend = (ROOT / "frontend" / "src" / "App.jsx").read_text(encoding="utf-8")
 
     assert "frontend:" in manifest and "mount: /app" in manifest
+    assert "public: false" 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 "Skill runner" not in frontend
+    assert "generate_svg_asset" in frontend
+    assert "DATABASE_URL" not in frontend
 
     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()
+    skill_names = {skill.name for skill in card.skills}
+    assert {"generate_svg_asset", "list_recent_receipts"} <= skill_names
     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"
+
+
+@pytest.mark.asyncio
+async def test_generate_svg_asset_smoke_without_database(monkeypatch):
+    monkeypatch.delenv("DATABASE_URL", raising=False)
+    auth = PlatformUserAuth(sub="stable-user", user_id=42, email="player@example.test")
+    result = await GeneratesSvgVideoGame9jg9vdF0f510().local_invoke(
+        "generate_svg_asset",
+        auth=auth,
+        asset_type="character",
+        theme="forest knight",
+        palette=["#22c55e", "#14532d", "#facc15"],
+        size=96,
+        style="pixel",
+        variant_count=2,
+    )
+    assert result.status == "ok"
+    assert result.receipt_id.startswith("rcpt_")
+    assert result.asset_id.startswith("asset_")
+    assert result.receipt_persisted is False
+    assert len(result.svg_assets) == 2
+    assert result.svg_assets[0]["svg"].startswith("<svg")
+    assert "DATABASE_URL" not in result.model_dump_json()
+
+
+@pytest.mark.asyncio
+async def test_generate_svg_asset_persists_receipt_when_database_configured(monkeypatch):
+    calls = []
+
+    def fake_persist(**kwargs):
+        calls.append(kwargs)
+
+    monkeypatch.setenv("DATABASE_URL", "postgresql://example.invalid/db")
+    monkeypatch.setattr(agent_module, "_persist_asset_and_receipt", fake_persist)
+    auth = PlatformUserAuth(sub="stable-user", user_id=7)
+    result = await GeneratesSvgVideoGame9jg9vdF0f510().local_invoke(
+        "generate_svg_asset",
+        auth=auth,
+        asset_type="item",
+        theme="crystal key",
+        palette=["#38bdf8", "#1e3a8a"],
+        size=128,
+        style="neon",
+        variant_count=1,
+    )
+    assert result.status == "ok"
+    assert result.receipt_persisted is True
+    assert calls
+    assert calls[0]["tenant_key"] == "user:7"
+    assert calls[0]["receipt_id"] == result.receipt_id
+    assert calls[0]["request"]["theme"] == "crystal key"
+
+
+def test_primary_schema_is_bounded_and_mcp_compatible():
+    card = GeneratesSvgVideoGame9jg9vdF0f510().card()
+    skill = next(item for item in card.skills if item.name == "generate_svg_asset")
+    schema = skill.input_schema
+    props = schema["properties"]
+    assert set(schema["required"]) >= {"asset_type", "theme"}
+    assert props["theme"]["maxLength"] == 80
+    assert props["size"]["maximum"] == 512
+    assert props["variant_count"]["maximum"] == 4
+    assert props["asset_type"]["enum"] == ["character", "enemy", "item", "tile", "icon", "projectile"]
+    assert schema["additionalProperties"] is False