some more review fixes

Author: eneufeld

CHANGELOG.md

@@ -12,9 +12,7 @@
 - [core] migration from deprecated `phosphorJs` to actively maintained fork `Lumino` [#14320](https://github.com/eclipse-theia/theia/pull/14320) - Contributed on behalf of STMicroelectronics
   Adopters importing `@phosphor` packages now need to import from `@lumino`. CSS selectors refering to `.p-` classes now need to refer to `.lm-` classes. There are also minor code adaptations, for example now using `iconClass` instead of `icon` in Lumino commands.
 - [core] typing of `addKeyListener` and `Widget.addKeyListener` corrected to reflect events for `additionalEventTypes`. Adopters declaring handlers explicitly expecting `KeyboardEvent` together with `additionalEventTypes` may need to update type declarations. [#15210]
-
-<a name="breaking_changes_1.60.0">[Breaking Changes:](#breaking_changes_1.60.0)</a>
-
+- [ai] the format for `ai-features.modelSettings.requestSettings` settings has changed. Furthermore the request object for LLMs slightly changed as the message types where improved. [#15092]
 - [ai-chat] `ParsedChatRequest.variables` is now `ResolvedAIVariable[]` instead of a `Map<string, AIVariable>` [#15196](https://github.com/eclipse-theia/theia/pull/15196)
 - [ai-chat] `ChatRequestParser.parseChatRequest` is now asynchronous and expects an additional `ChatContext` parameter [#15196](https://github.com/eclipse-theia/theia/pull/15196)
 

packages/ai-core/src/browser/ai-core-preferences.ts

@@ -118,6 +118,7 @@ export const aiCorePreferenceSchema: PreferenceSchema = {
                         }
                     },
                 },
+                additionalProperties: false
             },
             default: [],
         }