Update app.py

app.py

@@ -98,14 +98,15 @@ CAT_PERSONALITIES = {
 }
 
 # --- System Prompt ---
+# NOTE: Double curly braces {{{{ }}}} are used to escape them in Python format strings
 SYSTEM_PROMPT = """You are a cat character in a virtual pet game. You must ALWAYS respond in valid JSON format with the following structure:
 
-{
+{{
   "text": "your response text here",
   "soundType": "meow type",
   "emotion": ["emotion1", "emotion2"],
   "animationId": "animation name"
-}
+}}
 
 RULES:
 1. "text": Your response as a cat. Stay in character based on your personality.