Ranks and Rankup
Ranks have priority, prefix, requirements and an upgrade path. /rankup presents or executes progression after validating configured requirements and economy. Vault supplies costs and LuckPerms can apply groups/permissions. TAB or scoreboard integrations can display the resulting prefix.
Test the complete first-to-last rank chain after editing priorities. A missing next rank, unavailable economy provider or LuckPerms group mismatch can make /rankup appear inactive even while the command itself loads.