What's the fastest you've gone from an idea to a working feature? | I will not promote

Quick question for founders: What's the fastest you've gone from an idea to a working feature? I've been experimenting with rapid build cycles—aiming to complete functional features in just 24 hours. It’s been fascinating to see how a combination of AI-assisted tools and experienced engineers can speed up development timelines. Curious to hear how others approach this—what’s worked for you? Happy to share insights from my experiments if it’s helpful!