Singleplayer discipline for Survival: no OP, Survival enforced, difficulty and key gamerules locked, and a run log with milestones. Lock a world and it stays locked, even without the mod.
A locked run, summed up when you join.
OP blocked, Survival enforced, difficulty and gamerules locked, save-scum guard on.
The big steps of a run, stamped with the day and play time.
/hardgrind log: deaths, kills, the milestone timeline and any notes.
Cheating ends the world. No way back.
Game over?
/hardgrind revive confirm turns hardcore off, and the run log says so forever.
Creative worlds get commands back. Not a run.