> running the binary with `-h` or `--help` These shouldn't be taken for granted, I think the feature should be opt-in (and quite easy to contribute). I would

> running the binary with `-h` or `--help` These shouldn't be taken for granted, I think the feature should be opt-in (and quite easy to contribute). I would have executed the binary if there is a segment saying that it supports Shellac. The binary then detects the environment variable that's in the current spec, and prints completion information to stdout.