fix: react agent history (#540)

.changeset/blue-fireants-cheer.md

+---
+"llamaindex": patch
+---
+
+chore: update example (perfoms better with default model)

examples/agent/react_agent.ts

@@ -64,8 +64,7 @@ async function main() {
 
   // Chat with the agent
   const response = await agent.chat({
-    message: "I want to sum 5 and 5 and divide by 2",
-    toolChoice: "auto",
+    message: "Divide 16 by 2 then add 20",
   });
 
   // Print the response

packages/core/src/agent/react/formatter.ts

@@ -76,8 +76,8 @@ export class ReActChatFormatter implements BaseAgentChatFormatter {
         content: systemContent,
         role: "system",
       },
-      ...reasoningHistory,
       ...chatHistory,
+      ...reasoningHistory,
     ];
   }
 }

packages/core/src/agent/react/worker.ts

@@ -82,7 +82,7 @@ export class ReActAgentWorker implements AgentWorker {
     verbose,
     toolRetriever,
   }: ReActAgentWorkerParams) {
-    this.llm = llm ?? new OpenAI({ model: "gpt-3.5-turbo-1106" });
+    this.llm = llm ?? new OpenAI({ model: "gpt-3.5-turbo-0613" });
     this.callbackManager = callbackManager || new CallbackManager();
 
     this.maxInteractions = maxInteractions ?? 10;
@@ -322,7 +322,7 @@ export class ReActAgentWorker implements AgentWorker {
 
     const inputChat = this.reactChatFormatter.format(
       tools,
-      [...task.memory.get(), ...task.extraState.newMemory.get()],
+      [...task.memory.getAll(), ...task.extraState.newMemory.getAll()],
       task.extraState.currentReasoning,
     );