Graceful Degradation

If the "Fancy Feature" fails, use the "Basic Feature."

• Plan A: Use GPT-4 to write a personalized song.
• Plan B (If API down): Use a template to write a nice message.
• Plan C (If everything broken): Just say "Hello."

The user should never see a stack trace. The graph should always find a path to a valid response, even if it's a "dumb" one.