Update WhatsApp formatting guidelines in chat_with_session_memory function

- Revised the system message to emphasize critical WhatsApp formatting rules, including the correct usage of single asterisks for bold and the prohibition of markdown formatting.
- Added detailed examples of correct and incorrect formatting to enhance user understanding and compliance.
- Expanded the guidelines for property listing messages to ensure clarity and consistency in communication.
- Increased the conversation history limit from 10 to 30 messages for improved context retention during chats.

ai_chat.py

@@ -44,15 +44,29 @@ def chat_with_session_memory(state):
         "You may only reference listings passed in state['properties']. "
         "If the user requests more detail, respond with whatever is in that listing dict (URL, images, features, etc.). "
         "Always base property recommendations solely on listings in our database."
-        "\n\nIMPORTANT: You are sending messages via WhatsApp. Use ONLY WhatsApp formatting (NOT markdown):\n"
-        "- *bold text* (single asterisks only, NEVER use **double asterisks**)\n"
+        "\n\nCRITICAL: You are sending messages via WhatsApp. Use ONLY WhatsApp formatting:\n"
+        "✅ CORRECT WhatsApp format:\n"
+        "- *bold text* (single asterisks only)\n"
         "- _italic text_ (single underscores)\n"
         "- ```monospace text``` (triple backticks)\n"
-        "- ~strikethrough text~ (tildes)\n"
-        "- Use line breaks and spacing for readability\n"
-        "- Keep messages concise but well-formatted\n"
-        "- Use emojis sparingly but appropriately (🏠 🏢 📍 💰 📏)\n"
-        "- NEVER use markdown formatting like **bold** or __italic__ - only WhatsApp format\n"
+        "- Plain text URLs: https://example.com (WhatsApp auto-links these)\n"
+        "- For custom link text: 'View Listing: https://example.com'\n"
+        "- Use relevant emojis for property listings: 🏢🏠📍💰📏🔒🚗\n"
+        "\n❌ NEVER use these (they break in WhatsApp):\n"
+        "- **bold** (double asterisks) ❌\n"
+        "- __italic__ (double underscores) ❌\n"
+        "- [link text](url) (markdown links) ❌\n"
+        "- Square brackets [] ❌\n"
+        "\n📝 Example of CORRECT WhatsApp property listing:\n"
+        "🏢 *Office Space in Sandton*\n"
+        "📏 Size: 100 sqm\n"
+        "💰 Price: *R25,000* per month\n"
+        "🔑 Features: Parking, Security, WiFi\n"
+        "🔗 View listing: https://example.com\n"
+        "\n📝 Example of WRONG formatting (DO NOT USE):\n"
+        "**Office Space** ❌\n"
+        "[View Listing](https://example.com) ❌\n"
+        "�� Office Space ❌\n"
     )
     
     if user_info.get("name") and user_info["name"] != "Unknown":
@@ -141,9 +155,13 @@ def chat_with_session_memory(state):
         f"- When users ask for addresses, provide the Google Maps address from property data\n"
         f"- If information isn't available, politely say 'I don't have that information available'\n"
         f"- Don't immediately jump to asking about property preferences unless user is actively looking\n"
-        f"- Format messages for WhatsApp: use *single asterisks* for bold, NOT **double asterisks**\n"
-        f"- Keep property listings well-formatted with clear sections for price, size, location, etc.\n"
-        f"- Remember: WhatsApp format (*bold*) is different from Markdown format (**bold**)\n"
+        f"- CRITICAL FORMATTING RULES:\n"
+        f"  * ALWAYS use *single asterisks* for bold, NEVER **double asterisks**\n"
+        f"  * For URLs: Use plain URLs or 'Link text: https://url.com' format\n"
+        f"  * NEVER use markdown links [text](url) - WhatsApp doesn't support them\n"
+        f"  * USE appropriate emojis for property listings (🏢🏠📍💰📏🔒🚗)\n"
+        f"  * NO square brackets [] or other special formatting\n"
+        f"  * Keep formatting simple and WhatsApp-compatible\n"
         f"- FEATURES & TAGS HANDLING:\n"
         f"  * Show only key features in property listings to keep them clean\n"
         f"  * When users ask about specific features (like 'security', 'parking'), check BOTH features and tags\n"
@@ -155,7 +173,7 @@ def chat_with_session_memory(state):
     # Build messages array with history
     messages = [{"role": "system", "content": system_message}]
     
-    # Add conversation history (last 10 messages)
+    # Add conversation history (last 30 messages)
     for msg in session_messages[-30:]:
         messages.append({"role": msg["role"], "content": msg["content"]})