Renote is a personal notes system — a Notion-like editor stripped down to only the features I actually use. Building it was partly utility and partly study: implementing a block editor, slash commands, and a clean document model from scratch teaches you a lot about why the real ones make the tradeoffs they do.
It’s the kind of project I keep coming back to — a sandbox for editor and data-model ideas that later show up, more seriously, in Alabasta.