How tier kits work

• Pieces: the pieces section of config.yml defines what each tier kit has and which enchantment group (armor, weapons, tools) each piece uses. {armor} and {tools} are replaced with the tier's materials. Each tier can remove or change pieces.
• Automatic updates: every piece carries a hidden tag with its tier and a "version" of the config. When you change something that affects it, it is regenerated: on join, on /rk reload, when opening a chest, when picked up and on a timer in inventories. Amount and durability are kept.
• Attributes: the material's vanilla attributes are kept and the config's are added on top.
• Off hand: offhand (per tier or in defaults) is any item — totem, apples, shield… It goes to the off hand if it is free.
• Set bonus: wearing every armour piece of a tier applies its effects. They come back instantly after a totem, milk, /heal or /effect clear, a stronger potion is left alone and, if anything fails, they wear off within 30 s.

When a tier kit is given, armour is equipped directly if the slot is free (settings.equip-armor). Whatever does not fit is dropped.