diff --git a/src/context.ts b/src/context.ts
new file mode 100644
index 0000000..9610f4f
--- /dev/null
+++ b/src/context.ts
@@ -0,0 +1,16 @@
+type Message = { role: 'system' | 'user' | 'assistant'; content: string };
+
+export class ContextManager {
+  private messages: Message[] = [];
+
+  constructor() {
+  }
+
+  add(message: Message) {
+    this.messages.push(message);
+  }
+
+  getMessages(): Message[] {
+    return [...this.messages];
+  }
+}
\ No newline at end of file
diff --git a/src/index.ts b/src/index.ts
index f40fca4..f54a402 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,19 +1,25 @@
-import OpenAI from 'openai';
-import 'dotenv/config';
+import { ContextManager } from './context.js';
+import { chat } from './llm.js';
+import * as readline from 'node:readline/promises';
 
-const client = new OpenAI({
-  apiKey: process.env.OPENAI_API_KEY,
-  baseURL: process.env.OPENAI_BASE_URL,
+const context = new ContextManager();
+context.add({ role: 'system', content: '你是一个直爽的小助手，回答尽量简洁。' });
+
+const rl = readline.createInterface({
+  input: process.stdin,
+  output: process.stdout,
 });
 
-const response = await client.chat.completions.create({
-  model: 'deepseek-v4-pro',
-  messages: [
-    { role: 'system', content: '你是一个直爽的编程助手，回答尽量简洁。' },
-    { role: 'user', content: '什么是闭包？用一句话解释。' },
-  ],
-  temperature: 0.7,
-});
+console.log('Agent已启动，输入 "exit" 退出。\n');
 
-const reply = response.choices[0]?.message?.content;
-console.log(reply);
\ No newline at end of file
+while (true) {
+  const userInput = await rl.question('我: ');
+  if (userInput.toLowerCase() === 'exit') break;
+
+  context.add({ role: 'user', content: userInput });
+  const reply = await chat(context.getMessages());
+  console.log('助手:', reply.content);
+  context.add({ role: 'assistant', content: reply.content! });
+}
+
+rl.close();
\ No newline at end of file
diff --git a/src/llm.ts b/src/llm.ts
new file mode 100644
index 0000000..bc444df
--- /dev/null
+++ b/src/llm.ts
@@ -0,0 +1,16 @@
+import OpenAI from 'openai';
+import 'dotenv/config';
+
+const client = new OpenAI({
+  apiKey: process.env.OPENAI_API_KEY,
+  baseURL: process.env.OPENAI_BASE_URL,
+});
+
+export async function chat(messages: { role: string; content: string }[]) {
+  const response = await client.chat.completions.create({
+    model: 'deepseek-v4-pro',
+    messages: messages as any,
+    temperature: 0.7,
+  });
+  return response.choices[0]!.message!;
+}
\ No newline at end of file