Deobf vs obf names should be read at runtime from mappings if they're installed. This would improve compatibility accross dev envs with different mappings.

(making an issue so I don't forget about it ;-; )

This appears to be possible using the same system that ASM uses. The implementation used from ASM can be found in ASMAPI.mapMethod/mapField. It may be best to actually use those methods, as opposed to copying their implementation, since ASMAPI is used from within ASM code, so the api will be more stable.