A small mod to provide an "exhaustion" value for players, that reduces when mining ores and opening lootr containers for the first time (and optionally killing mobs.)
Energy loss is decreased by food diversity from spice of life : onion, and energy can be restored using enchanted golden apples or other configurable foods.
When low on energy, players will be affected by mining fatigue and weakness.
Energy recharges with time (including for logged off players).
This mod is intended for community servers, to avoid players with a lot of time being OP and completing every mod too quickly. It kinda limits playtime, except not for construction.