How the phone-to-phone QR file transfer got built in one night with Claude Code

Evan Crawley developed a phone-to-phone QR file transfer app using Claude Code, which gained significant attention after a demo went viral. The app, allowing file transfers by pointing a camera at QR codes, initially blew up on Reddit with 7.6k upvotes. Although it initially received no traction on Hacker News, a subsequent post propelled it to the front page there, and it was also seen on LinkedIn.

This report details the app's viral spread across Reddit and Hacker News, unlike many projects that gain traction on only one platform.