refactor: Update model settings name from "aider/extra" to "aider/extra_params"

aider/models.py

@@ -803,7 +803,7 @@ class Model(ModelSettings):
 
         # Find the extra settings
         self.extra_model_settings = next(
-            (ms for ms in MODEL_SETTINGS if ms.name == "aider/extra"), None
+            (ms for ms in MODEL_SETTINGS if ms.name == "aider/extra_params"), None
         )
 
         self.info = self.get_model_info(model)

aider/website/docs/config/adv-model-settings.md

@@ -70,7 +70,14 @@ Files loaded last will take priority.
 
 The yaml file should be a list of dictionary objects for each model.
 
-You can use the special model name `aider/extra_params` to define settings that will be applied to all models. For example:
+
+### Global extra params
+
+You can use the special model name `aider/extra_params` to define 
+`extra_params` that will be passed to `litellm.completion()` for all models.
+Only the `extra_params` dict is used from this special model name.
+
+For example:
 
 ```yaml
 - name: aider/extra_params
@@ -80,7 +87,10 @@ You can use the special model name `aider/extra_params` to define settings that
     max_tokens: 8192
 ```
 
-These settings will be merged with any model-specific settings, with the model-specific settings taking precedence for any conflicts.
+These settings will be merged with any model-specific settings, with the 
+`aider/extra_params` settings taking precedence for any direct conflicts.
+
+### Example model settings
 
 Below are all the pre-configured model settings to give a sense for the settings which are supported.
 

tests/basic/test_models.py

@@ -100,7 +100,7 @@ class TestModels(unittest.TestCase):
         # Create temporary YAML file with test settings
         test_settings = [
             {
-                "name": "aider/extra",
+                "name": "aider/extra_params",
                 "extra_params": {
                     "extra_headers": {"Foo": "bar"},
                     "some_param": "some value",