In my notes system (works a bit like streams) my notes are all stored in the system namespace (start with $:/) and I’d love to use backlinks[] to find topics without recent notes, but backlinks specifically doesn’t work for system tiddlers. I’ve actually run into this limitation a few times over the years and it’s always a pain to work around.
I typically work “the other way around” and either instead filter through all notes:
- Use links[]but then in filter steps, I lose the<currentTiddler>, and create very complex multi-step filters
- Use search:text:regexp[]with variables to find the square brackets for hard links
One of two solutions would seem to make sense if I could figure it out:
- Add a flag to backlinks[]likebacklinks:includesystem[...]or something
- Add a parameter to search[]for links likesearch:links[...]- Swapping links for field is a bit of a kludge as you’d lose specificity of field
 
Hoping somebody has a creative solution or a plugin that might be close to work from.