regen-source
An advisory: it explains, and blocks nothing, on a hand edit to a file a target regenerates.
What it catches
A hand edit to a file a target regenerates.
Seeing it
A verdict names its rule in brackets, which is how you got here:
advise [regen-source]: ...
magus describe rule regen-source prints the same entry at a terminal, and
magus describe rules lists every rule this workspace enforces.