fix: default values of sampling params

packages/core/src/core/baseLlmClient.test.ts

@@ -151,8 +151,7 @@ describe('BaseLlmClient', () => {
           contents: defaultOptions.contents,
           config: {
             abortSignal: defaultOptions.abortSignal,
-            temperature: 0,
-            topP: 1,
+            topP: 0.8,
             tools: [
               {
                 functionDeclarations: [
@@ -189,7 +188,7 @@ describe('BaseLlmClient', () => {
         expect.objectContaining({
           config: expect.objectContaining({
             temperature: 0.8,
-            topP: 1, // Default should remain if not overridden
+            topP: 0.8, // Default should remain if not overridden
             topK: 10,
             tools: expect.any(Array),
           }),

packages/core/src/core/baseLlmClient.ts

@@ -66,8 +66,7 @@ export interface GenerateJsonOptions {
 export class BaseLlmClient {
   // Default configuration for utility tasks
   private readonly defaultUtilityConfig: GenerateContentConfig = {
-    temperature: 0,
-    topP: 1,
+    topP: 0.8,
   };
 
   constructor(

packages/core/src/core/client.test.ts

@@ -2310,7 +2310,7 @@ ${JSON.stringify(
             abortSignal,
             systemInstruction: getCoreSystemPrompt(''),
             temperature: 0.5,
-            topP: 1,
+            topP: 0.8,
           },
           contents,
         },

packages/core/src/core/client.ts

@@ -94,8 +94,7 @@ const MAX_TURNS = 100;
 export class GeminiClient {
   private chat?: GeminiChat;
   private readonly generateContentConfig: GenerateContentConfig = {
-    temperature: 0,
-    topP: 1,
+    topP: 0.8,
   };
   private sessionTurnCount = 0;