qBittorrent official forums

1. The available parameter options are very limited and aren't very useful in how it integrates with the rest of the WebUI API. A good portion of the WebUI commands require the torrent hash value. This seems like an obvious parameter option to have.
2. The ability to re-trigger the torrent completion (like through a forced recheck) should trigger the external program option. I'm on version 3.1.12 and the re-check on a completed torrent doesn't currently work this way even though the re-check removes the torrent from the 'completed' group while its checking. Adding a way to fire off the external program on a torrent or even a way to "re-complete" the torrent to then fire the external program would be very helpful.

If I'm doing something wrong in regards to this functionality then please correct me. Otherwise, I think these would be worthwhile changes.

from the 'completed' group while its checking

The completed 'group' is actually a filter, and while it is 'checking' it cannot be filtered as complete.

Also:

libtorrent does not provide a "status change" from 'checking' to 'whatever state the payload is in' so "run external program" has no way of being triggered if the check results in a 'completed' status.