updated tests to work without .env file

main.py

@@ -1,5 +1,6 @@
 import asyncio
 
+from agent.config import settings
 from agent.loop import run_session
 from sandbox.session import PodmanSandbox
 
@@ -15,6 +16,15 @@ async def run_tui():
 
 def main():
     print("Hello from mycode!")
+
+    # Validate required settings
+    if not settings.anthropic_api_key:
+        print("Error: ANTHROPIC_API_KEY not set")
+        print("\nPlease create a .env file with:")
+        print("  ANTHROPIC_API_KEY=sk-ant-...")
+        print("\nSee .env.example for template")
+        exit(1)
+
     asyncio.run(run_tui())