Kyan is 21, still in college, and has never built anything before. He’d been playing guitar every day for a year when he noticed ChatGPT was terrible at helping him dial in tones. So he vibe-coded ToneAdapt in a week. Type in your guitar + amp + the song you want to sound like, and it tells you exactly how to set your rig. 5 months later: 100,000+ users. $25K/month.