Fallback and try llama-swap format

frigate/genai/llama_cpp.py

@@ -101,7 +101,11 @@ class LlamaCppClient(GenAIClient):
                 e,
             )
 
-        # Query /props for context size, modalities, and tool support
+        # Query /props for context size, modalities, and tool support.
+        # The standard /props?model=<name> endpoint works with llama-server.
+        # If it fails, try the llama-swap per-model passthrough endpoint which
+        # returns props for a specific model without requiring it to be loaded.
+        try:
             try:
                 response = requests.get(
                     f"{base_url}/props",
@@ -110,6 +114,13 @@ class LlamaCppClient(GenAIClient):
                 )
                 response.raise_for_status()
                 props = response.json()
+            except Exception:
+                response = requests.get(
+                    f"{base_url}/upstream/{configured_model}/props",
+                    timeout=10,
+                )
+                response.raise_for_status()
+                props = response.json()
 
             # Context size from server runtime config
             default_settings = props.get("default_generation_settings", {})