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

changelog.md

@@ -1,5 +1,12 @@
 # Changelog
 
+## 2026-01-20 - 0.13.0 - feat(provider.ollama)
+add chain-of-thought reasoning support to chat messages and Ollama provider
+
+- Added optional reasoning?: string to chat message and chat response interfaces to surface chain-of-thought data.
+- Propagates reasoning from message history into formatted requests sent to Ollama.
+- Maps Ollama response fields (thinking or reasoning) into ChatResponse.reasoning so downstream code can access model reasoning output.
+
 ## 2026-01-20 - 0.12.1 - fix(docs)
 update documentation: clarify provider capabilities, add provider capabilities summary, polish examples and formatting, and remove Serena project config
 

ts/00_commitinfo_data.ts

@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@push.rocks/smartai',
-  version: '0.12.1',
+  version: '0.13.0',
   description: 'SmartAi is a versatile TypeScript library designed to facilitate integration and interaction with various AI models, offering functionalities for chat, audio generation, document processing, and vision tasks.'
 }

ts/abstract.classes.multimodal.ts

@@ -8,6 +8,8 @@ export interface ChatMessage {
   content: string;
   /** Base64-encoded images for vision-capable models */
   images?: string[];
+  /** Chain-of-thought reasoning for GPT-OSS models (e.g., Ollama) */
+  reasoning?: string;
 }
 
 /**
@@ -35,6 +37,8 @@ export interface StreamingChatOptions extends ChatOptions {
 export interface ChatResponse {
   role: 'assistant';
   message: string;
+  /** Chain-of-thought reasoning from reasoning models */
+  reasoning?: string;
 }
 
 /**

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;
     });