Tag-based organization system with drag-drop, real-time filtering, row/column layouts. ~55KB gzipped.

Built it frustrated with Trello's limitations. The 512KB constraint forced good architecture: server-side rendering, progressive enhancement, shared indexes instead of per-item duplication. Perfect Lighthouse score so far - the real test is keeping it through release.

Extracting patterns into genX framework (genx.software) for release later this month.

"What crazy website can _you_ build in 512KB?" Exactly! That would be super fun and interesting.