MC 1.19.3
Carpet 1.4.91

The world_min_spawning_light argument for the function system_info is listed in the docs, and, as far as my limited Java knowledge can tell, is defined.

However, system_info('world_min_spawning_light') throws an "unknown option" error and using system_info() matches the docs exactly except for the aforementioned option.

Oh I'm dumb. Do versions for snapshots also support the previous release?

Probs not, though there is a 1.19.3 version of carpet 1.4.95

That's cos system_info('world_min_spawning_light') was added in carpet 1.4.95