Can’t the Queue be used for this purpose? People can use it for writing prompts and such, not necessarily spaced repetition.
Considering one can set up multiple knowledge bases, Queues can have multiple purposes, if one needs both functions.
Or, you can tag Rems to be used for this writing prompt and/or Spaced Repetition purposes, and Folder, Document, or Embedded Portal Queues can serve instead.
Think the Graph may be useful in this endeavour as well.
I mean, it is a great idea, don’t get me wrong (would be really nice to have actually!), just accomplishable with current methods as well.