Immortal Villagers

Villagers can be made unable to take damage or die, so they are not turned into zombies or witches and do not drop from attacks. The mod also exposes settings for zombie and witch conversion chances, which can be tuned on the server. A villager that a witch converted can be turned back into a villager with the same trades.

Several optional behaviors can be switched on separately. A nitwit can be converted into a villager by interacting with it while holding a book, and a villager can be turned into a nitwit with a stick, which can carry a configurable name. Crouching over a villager can reset its trades and give emeralds or an emerald block, and a villager under a witch's influence can be given a golden apple or an enchanted golden apple to end the conversion, with a weakness effect applied. Villagers that die can optionally respawn at their closest bed, and a configurable radius limits where respawn is allowed.

The mod is installed on both the server and every player's client, since the environment is client and server. It requires Cloth Config API, Fabric API, Mod Menu and VillagerUnknown's Platform, and is published only for Fabric across 15 release versions, 1.21.1 – 26.2. Source code and an issue tracker are public, and the code is under the MIT License, so the mod is open source.