feat(provider.ollama): add chain-of-thought reasoning support to chat messages and Ollama provider

ts/provider.ollama.ts

@@ -205,13 +205,16 @@ export class OllamaProvider extends MultiModalModel {
   public async chat(optionsArg: ChatOptions): Promise<ChatResponse> {
     // Format messages for Ollama
     const historyMessages = optionsArg.messageHistory.map((msg) => {
-      const formatted: { role: string; content: string; images?: string[] } = {
+      const formatted: { role: string; content: string; images?: string[]; reasoning?: string } = {
         role: msg.role,
         content: msg.content,
       };
       if (msg.images && msg.images.length > 0) {
         formatted.images = msg.images;
       }
+      if (msg.reasoning) {
+        formatted.reasoning = msg.reasoning;
+      }
       return formatted;
     });
 
@@ -254,6 +257,7 @@ export class OllamaProvider extends MultiModalModel {
     return {
       role: 'assistant' as const,
       message: result.message.content,
+      reasoning: result.message.thinking || result.message.reasoning,
     };
   }
 
@@ -283,6 +287,7 @@ export class OllamaProvider extends MultiModalModel {
     return {
       role: 'assistant' as const,
       message: response.message,
+      reasoning: response.thinking,
     };
   }
 
@@ -296,15 +301,18 @@ export class OllamaProvider extends MultiModalModel {
     const timeout = optionsArg.timeout || this.defaultTimeout;
     const modelOptions = { ...this.defaultOptions, ...optionsArg.options };
 
-    // Format history messages with optional images
+    // Format history messages with optional images and reasoning
     const historyMessages = optionsArg.messageHistory.map((msg) => {
-      const formatted: { role: string; content: string; images?: string[] } = {
+      const formatted: { role: string; content: string; images?: string[]; reasoning?: string } = {
         role: msg.role,
         content: msg.content,
       };
       if (msg.images && msg.images.length > 0) {
         formatted.images = msg.images;
       }
+      if (msg.reasoning) {
+        formatted.reasoning = msg.reasoning;
+      }
       return formatted;
     });
 
@@ -410,15 +418,18 @@ export class OllamaProvider extends MultiModalModel {
     const timeout = optionsArg.timeout || this.defaultTimeout;
     const modelOptions = { ...this.defaultOptions, ...optionsArg.options };
 
-    // Format history messages with optional images
+    // Format history messages with optional images and reasoning
     const historyMessages = optionsArg.messageHistory.map((msg) => {
-      const formatted: { role: string; content: string; images?: string[] } = {
+      const formatted: { role: string; content: string; images?: string[]; reasoning?: string } = {
         role: msg.role,
         content: msg.content,
       };
       if (msg.images && msg.images.length > 0) {
         formatted.images = msg.images;
       }
+      if (msg.reasoning) {
+        formatted.reasoning = msg.reasoning;
+      }
       return formatted;
     });