providers: presets for polza/openai/ollama (--provider), keys from env, gpt-5.6-luna default for polza, multimodal heuristic for cloud ids

testbed/demo.py

@@ -37,9 +37,9 @@ from aicc.protocol import SessionInit
 from aicc.transport.websocket import WebSocketClientTransport
 from PIL import Image
 
+from testbed.llm_agent import resolve_provider
+
 DEFAULT_URL = "ws://127.0.0.1:8765"
-DEFAULT_BASE_URL = "http://localhost:11434/v1"
-DEFAULT_MODEL = "gemma4:e2b"
 
 
 class FrameRecorder:
@@ -392,12 +392,26 @@ def main() -> int:
         help="agent driver (default auto: LLM if reachable, else scripted)",
     )
     parser.add_argument(
-        "--base-url", default=DEFAULT_BASE_URL, help="OpenAI-compatible endpoint"
+        "--base-url",
+        default=None,
+        help="OpenAI-compatible endpoint (default per --provider)",
     )
     parser.add_argument(
-        "--model", default=DEFAULT_MODEL, help="model id on the endpoint"
+        "--provider",
+        choices=["polza", "openai", "ollama"],
+        default=None,
+        help="provider preset: endpoint + key from env (POLZA_API_KEY/OPENAI_API_KEY)",
+    )
+    parser.add_argument(
+        "--model",
+        default=None,
+        help="model id on the endpoint (default per provider: polza -> openai/gpt-5.6-luna)",
+    )
+    parser.add_argument(
+        "--api-key",
+        default=None,
+        help="API key (default: $POLZA_API_KEY / $OPENAI_API_KEY per provider)",
     )
-    parser.add_argument("--api-key", default="ollama", help="API key for the endpoint")
     parser.add_argument("--max-steps", type=int, default=60, help="max agent steps")
     parser.add_argument(
         "--vision",
@@ -429,6 +443,18 @@ def main() -> int:
         "into this directory, plus demo.gif animation and demo_summary.png",
     )
     args = parser.parse_args()
+    try:
+        args.base_url, args.api_key, args.model = resolve_provider(
+            provider=args.provider,
+            base_url=args.base_url,
+            api_key=args.api_key,
+            model=args.model,
+        )
+        if args.provider:
+            print(f"[demo] provider: {args.provider} -> {args.base_url}  model: {args.model}")
+    except ValueError as exc:
+        print(f"[demo] {exc}")
+        return 1
     try:
         summary = asyncio.run(run_demo(args))
     except KeyboardInterrupt: