As noted in this question: Android app to list and manage programs' intents by program - there are at least 2 apps that let you manage which apps get passed which Intents.
However, having looked at both of those apps, they suffer from the same missing use case/feature:
When you install a new version of any app on Android, the system resets all of its intents.
So, what I am looking for, is an app that lets me counter-act this drift of re-enabled intents resulting from installing app updates (or new apps).
I'm fine with either:
End-to-end solution (an app that keeps tracks of which Intents were changed/added since last run and lets me manage ONLY those)
Piecemail solution (an app that lets me export a full list of intents and their enablement status to a file being the critical piece for this question; I can then do a "diff" command on old and new file by hand and then manage whatever the diff finds using standard Intent management apps from linked question).