Providing working example for the essence of sc_reduce32 at Why is sc_reduce32 needed? created another question.
% echo deefd263cbfed62a3711dd133df3ccbd1c4dc4aac21d7405fd667498bf8ebaa1 | sc_reduce32
The command above is suffixed with the byte 0x01. Trying to understand what is the purpose of this byte? For the URL above, three major steps was used to compute the normalized private key from the curve order for either ed25519 or cv25519. Another person independently made a similar computation and concluded it was unclear what the traceability for the extra 8 byte.