The -i parameter is required

[NaNraptor]

Under Usage there is the following command listed:

slime_seed_finder -s 1234 -o 1234.txt

This will not work as the -i param is not specified, which seems to be required, a workaround is to just create an empty .txt file and do:

slime_seed_finder -s 1234 -o 1234.txt -i ./empty.txt

[Badel2]

All those flags were getting out of control... The new command for generating slime chunks is:

slime_seed_finder generate --num-slime-chunks=20 --seed=1234 -o seedinfo1234.json

Much better, isn't it?