Five people want to go to Sicily in June. Usually that means a spreadsheet, a few group chats, links that get lost somewhere, and nobody knows what has already been decided. This time I opened an editor on March 30.

Twelve days and 51 commits later there was a site that holds the whole plan. Built on my own, live on GitHub Pages. Accommodation, flights, the car, activities, a packing list, the budget, votes, an idea wall, a day plan and tasks for who does what.

Technically it’s plain on purpose. Static HTML and JavaScript, no database, no framework. One thing was still needed: the data has to sync when two people add something at the same time. That’s what the Cloudflare Worker behind it is for. It handles sign-in with GitHub, writes the data back into the repository through the GitHub API and has a small scraper. When someone pastes a link to an offer, the worker reads the page in. Nobody has to retype what’s already written there.

The demo on this page shows three parts with sample data and no real names. In the votes, everyone picks an option and the result is there right away. The budget adds up what’s planned. And the day plan fixes what happens on which day. Those are the three places where groups usually get stuck in the chat.