The /profession command and what is saved

The /profession command

Command	Who	Does
/profession choose <profession>	any player, for themselves	takes a first profession in Crew mode. Refused in Solo mode, and refused once a profession is chosen: a change goes through an operator or the consumer's own item or NPC
/profession mode	any player	shows the mode and the player's profession
/profession get <player> <profession>	operators	shows level and XP
/profession set <player> <profession> <level>	operators	admin write, no event, no mode check
/profession addxp <player> <profession> <amount>	operators	goes through addXp: events, multipliers and the Crew check apply
/profession reset <player>	operators	clears the choice and every profession

Operators means permission level 2.

What is saved

The XP of each profession is stored on the player, keyed by profession id, and survives death, the End portal and relogging. The XP of a profession whose mod was removed is kept, and comes back if the mod does.