diff --git a/src/handlers/user.py b/src/handlers/user.py
index 55284eb..fc865b3 100644
--- a/src/handlers/user.py
+++ b/src/handlers/user.py
@@ -219,6 +219,57 @@ async def upload_doc(update: Update, context: ContextTypes.DEFAULT_TYPE):
     )
 
 
+async def handle_message(update: Update, context: ContextTypes.DEFAULT_TYPE):
+    user_data = db.get_user(update.effective_user.id)
+    if not user_data:
+        await update.message.reply_text("⛔ Belum terdaftar. Gunakan /start TOKEN untuk registrasi.")
+        return
+
+    question = update.message.text.strip()
+    if not question:
+        return
+
+    await update.message.chat.send_action("typing")
+
+    if not await is_academic_topic(question, _client, DEEPSEEK_MODEL):
+        await update.message.reply_text(REJECT_MESSAGE)
+        return
+
+    relevant = await rag.search(user_data["id"], question, n_results=5)
+    context_text = ""
+    if relevant:
+        context_text = "\n\nKonteks dari Second Brain pengguna:\n" + "\n".join(
+            f"[{'Global' if r['scope'] == 'global' else 'Pribadi'}] {r['content']}"
+            for r in relevant
+        )
+
+    history = db.get_conversation_history(user_data["id"])
+    system_prompt = (
+        f"{ACADEMIC_SYSTEM_PROMPT}\n\n"
+        f"Nama dosen: {user_data['full_name']}"
+        f"{context_text}"
+    )
+
+    messages = [{"role": "system", "content": system_prompt}]
+    messages.extend(history)
+    messages.append({"role": "user", "content": question})
+
+    try:
+        response = await _client.chat.completions.create(
+            model=DEEPSEEK_MODEL,
+            messages=messages,
+            max_tokens=1500,
+        )
+        answer = response.choices[0].message.content
+    except Exception as e:
+        await update.message.reply_text(f"❌ Gagal menghubungi AI: {str(e)[:100]}")
+        return
+
+    db.save_conversation(user_data["id"], "user", question)
+    db.save_conversation(user_data["id"], "assistant", answer)
+    await update.message.reply_text(answer)
+
+
 async def clear_chat(update: Update, context: ContextTypes.DEFAULT_TYPE):
     user_data = db.get_user(update.effective_user.id)
     if not user_data:
diff --git a/src/main.py b/src/main.py
index 97d3995..0636dc7 100644
--- a/src/main.py
+++ b/src/main.py
@@ -50,6 +50,9 @@ def main():
     ))
     app.add_handler(MessageHandler(filters.Document.ALL, user_handler.upload_doc))
 
+    # Plain text → langsung tanya AI tanpa perlu /ask
+    app.add_handler(MessageHandler(filters.TEXT & ~filters.COMMAND, user_handler.handle_message))
+
     print("🤖 Second Brain Bot is running...")
     app.run_polling()