feat(zen): add live model sync

tests/test_sync_zen_models.py

@@ -0,0 +1,61 @@
+import importlib.util
+from pathlib import Path
+
+
+SCRIPT_PATH = Path(__file__).resolve().parents[1] / "scripts" / "sync_zen_models.py"
+SPEC = importlib.util.spec_from_file_location("sync_zen_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_applies_family_defaults_for_gpt_5_4():
+    converted = MODULE.convert_model({"id": "gpt-5.4"}, curated_models={})
+
+    assert converted is not None
+    assert converted["model_name"] == "gpt-5.4"
+    assert converted["context_window"] == 1050000
+    assert converted["max_output_tokens"] == 128000
+    assert converted["supports_extended_thinking"] is True
+    assert converted["supports_images"] is True
+    assert converted["use_openai_response_api"] is True
+
+
+def test_convert_model_prefers_curated_metadata_when_available():
+    converted = MODULE.convert_model(
+        {"id": "claude-opus-4-5"},
+        curated_models={
+            "claude-opus-4-5": {
+                "context_window": 200000,
+                "max_output_tokens": 64000,
+                "supports_extended_thinking": False,
+                "description": "Curated Opus 4.5",
+                "intelligence_score": 18,
+                "allow_code_generation": True,
+            }
+        },
+    )
+
+    assert converted is not None
+    assert converted["model_name"] == "claude-opus-4-5"
+    assert converted["context_window"] == 200000
+    assert converted["max_output_tokens"] == 64000
+    assert converted["supports_extended_thinking"] is False
+    assert converted["description"] == "Curated Opus 4.5"
+    assert converted["allow_code_generation"] is True
+
+
+def test_build_output_document_sorts_model_ids():
+    document = MODULE.build_output_document(
+        {
+            "data": [
+                {"id": "gpt-5.4-pro"},
+                {"id": "claude-opus-4-6"},
+            ]
+        },
+        "https://opencode.ai/zen/v1/models",
+        curated_models={},
+    )
+
+    model_names = [item["model_name"] for item in document["models"]]
+    assert model_names == sorted(model_names)