Family Historian User Group

this is likely something that is on the impossible side without fh having trigger slots for callbacks:

that is; something like

fhRegisterAlert(..., ...)
fhPerform('on_Project_Open', ShowProjectStatistics.fh_lua)
fhReceiveAlert('on_fhSet..., ...)
fhReceiveAlert('on_close_plugin', 'MLF.fh_lua')
fhReceiveAlert('on_close_plugin_file', qgenesist)

anyway, is there any sort of programmatic way to tell a program is about to close?

No.

uff da, that is gonna be a iot of saves for me.