A weather app, because every developer builds one eventually and mine should at least move. The sky, the sun, the rain, and the ground band are GSAP timelines driven by the actual forecast: a 7-day outlook, an animated scene per condition, and a dock that follows the terrain.
The OpenWeather calls happen server side in SvelteKit load functions, so the API key never reaches the browser. State is Svelte 5 runes all the way down; there is no store file in the repo.