Not sure if this plugin is being updated, but its still alive here:
I'm trying to use a custom filter for the search results of this plugin. Specifically I am using Streams and want to exclude all non-root tiddlers from the normal search.
For example TiddlyWiki's sidebar search uses the following filter by default: [!is[system]search:title<userInput>sort[title]limit[250]], which I have changed to this: [!is[system]search:title<userInput>sort[title]limit[250]!regexp[^.*/\d{17}$]].
I would like to do something similar with Command Palette but I'm struggling to figure it out. Any users of this plugin out there who know how to do this?