It would be great to have a cross-platform API for integrating with the system 'tray' (the system's notification area). Electron has shown a potential API for this use-case, along with events and methods that have thought-through applicability to all platforms.

This API surface would be a good starting point:
https://electronjs.org/docs/api/tray

The API surface is fairly large, so we should start by thinking of a minimal subset - perhaps addressing the following scenarios:

• Create a tray icon
• Destroy a tray icon

We'd also likely need a context menu for OSX.