Tessel, the Calendar That Plans Itself
Product Demo#calendar#launch#open source#sound design
Made by Leon Lin (@lexnlin on X)View original post
A launch video for a made-up calendar app, where the name, logo, interface, animation, soundtrack and sound effects are all code.
How it was made
Process
Made with Claude Code from a single prompt that ran for about eight hours. Everything seen and heard is code, including the music.
The creator did not post the prompt, but open-sourced the whole project.
Resources the creator shared:
The prompt shown here was written afterwards from the finished clip, so it describes what is on screen.
