OreFeller

Breaking one ore block removes every directly connected block of the same type in a single action. Only ores touching the broken block through their faces count as part of the vein, so the mining stays confined to the vein and leaves neighboring stone and other ores alone. Vanilla mining keeps its pace here: breaking ore stays quick and rewarding, and players still have to gather the ore themselves.

Each block removed in a vein consumes tool durability, so a long vein costs more of a pickaxe than a single block would. Modded ores can be included, and the activation behavior is adjustable in the configuration. The mod is a quality-of-life addition for survival worlds and does not replace the need to obtain tools and progress through the game.

OreFeller runs on Fabric only and is published for 1.21.11. It is licensed under the MIT License and is not open source. A server running it needs every connecting player to have it too. Fabric API is not listed as a dependency. Support for NeoForge is planned by the author but is not available.