I’ve had an idea for a project but I suspect it’s either done already in whole or in part: a multi-editor, offline-capable, cross-platform blog composer/editor app. Think Live Writer but for macOS and Linux too, and one where the master state of the whole site lives locally. Sounds like something that could be done by combining Ghost, Electron, SQLite and a few other bits.... but this also seems so obvious that someone had to have done it already, but I can’t see that it’s been done.
THAT is my challenge of the week in contributing to open source: not wanting to reinvent a wheel that seems so obvious it has to have been done, right?