feat(openrouter): add live model sync

tests/test_sync_openrouter_models.py

@@ -0,0 +1,53 @@
+import importlib.util
+from pathlib import Path
+
+
+SCRIPT_PATH = Path(__file__).resolve().parents[1] / "scripts" / "sync_openrouter_models.py"
+SPEC = importlib.util.spec_from_file_location("sync_openrouter_models", SCRIPT_PATH)
+assert SPEC is not None and SPEC.loader is not None
+MODULE = importlib.util.module_from_spec(SPEC)
+SPEC.loader.exec_module(MODULE)
+
+
+def test_convert_model_maps_openrouter_payload_conservatively():
+    converted = MODULE.convert_model(
+        {
+            "id": "openai/gpt-5.4",
+            "description": "GPT-5.4 description",
+            "context_length": 400000,
+            "top_provider": {"max_completion_tokens": 128000},
+            "architecture": {"input_modalities": ["text", "image"]},
+            "supported_parameters": ["temperature", "reasoning", "response_format", "structured_outputs"],
+        }
+    )
+
+    assert converted is not None
+    assert converted["model_name"] == "openai/gpt-5.4"
+    assert converted["context_window"] == 400000
+    assert converted["max_output_tokens"] == 128000
+    assert converted["supports_extended_thinking"] is True
+    assert converted["supports_json_mode"] is True
+    assert converted["supports_function_calling"] is False
+    assert converted["supports_images"] is True
+    assert converted["max_image_size_mb"] == 20.0
+    assert converted["supports_temperature"] is True
+    assert converted["temperature_constraint"] == "range"
+    assert converted["allow_code_generation"] is False
+
+
+def test_convert_model_marks_reasoning_models_without_temperature_as_fixed():
+    converted = MODULE.convert_model(
+        {
+            "id": "openai/o3",
+            "description": "o3 description",
+            "context_length": 200000,
+            "top_provider": {},
+            "architecture": {"input_modalities": ["text"]},
+            "supported_parameters": ["reasoning"],
+        }
+    )
+
+    assert converted is not None
+    assert converted["supports_temperature"] is False
+    assert converted["temperature_constraint"] == "fixed"
+    assert converted["supports_images"] is False