I built a Minecraft mod where the companion actually feels like a second player — 7 classes, level 1-200, mines and fights with you
CompanionRM (Fabric 1.21.1) — a humanoid AI companion (not LLMs or external services, only behavior on its own) that levels 1→200, picks one of 7 classes at level 10 (Warrior, Rogue, Mystic, Spell Lancer, Miner, Elementalist, Villager), auto-equips gear, and can mine, fight, fish, harvest/replant crops, and craft tools on its own.
At level 200 it can Reborn (back to level 1 but stronger), becomes a walking workshop with passive Furnace / Anvil / Enchanting, and the new rarity tier system (D→S) means wild Legendaries spawn pre-equipped with full matching gear.
Solo Brazilian dev here. my english is mostly for coding, sorry in advance for any weird sentences. The mod itself is almost translated in-game (EN + PT-BR) (only the dialogues in chat are still in portuguese). Still in alpha. Looking for the kind of feedback this sub gives. what would you want to see next?
Links to CurseForge and Modrinth in the comments below.