remove topp default value 0.0 (QwenLM#785)

Author: koalazf99

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

@@ -434,8 +434,6 @@ describe('Gemini Client (client.ts)', () => {
           config: {
             abortSignal,
             systemInstruction: getCoreSystemPrompt(''),
-            temperature: 0,
-            topP: 1,
             tools: [
               {
                 functionDeclarations: [
@@ -486,7 +484,6 @@ describe('Gemini Client (client.ts)', () => {
             abortSignal,
             systemInstruction: getCoreSystemPrompt(''),
             temperature: 0.9,
-            topP: 1, // from default
             topK: 20,
             tools: [
               {
@@ -2461,7 +2458,6 @@ ${JSON.stringify(
             abortSignal,
             systemInstruction: getCoreSystemPrompt(''),
             temperature: 0.5,
-            topP: 1,
           },
           contents,
         },

packages/core/src/core/client.ts

@@ -115,10 +115,7 @@ export class GeminiClient {
   private chat?: GeminiChat;
   private contentGenerator?: ContentGenerator;
   private readonly embeddingModel: string;
-  private readonly generateContentConfig: GenerateContentConfig = {
-    temperature: 0,
-    topP: 1,
-  };
+  private readonly generateContentConfig: GenerateContentConfig = {};
   private sessionTurnCount = 0;
 
   private readonly loopDetector: LoopDetectionService;

packages/core/src/core/openaiContentGenerator/pipeline.ts

@@ -302,9 +302,9 @@ export class ContentGenerationPipeline {
     };
 
     const params = {
-      // Parameters with request fallback and defaults
-      temperature: getParameterValue('temperature', 'temperature', 0.0),
-      top_p: getParameterValue('top_p', 'topP', 1.0),
+      // Parameters with request fallback but no defaults
+      ...addParameterIfDefined('temperature', 'temperature', 'temperature'),
+      ...addParameterIfDefined('top_p', 'top_p', 'topP'),
 
       // Max tokens (special case: different property names)
       ...addParameterIfDefined('max_tokens', 'max_tokens', 'maxOutputTokens'),