TreeChopper

Breaking a log with an axe in the main hand brings down the entire tree, so trees whose canopies touch are felled together by a single break. Logs and leaves are taken as one connected cluster, and the mod works with the minecraft:logs and minecraft:leaves block tags, along with the minecraft:axes item tag, which means modded trees and axes tagged that way are covered too.

Sneaking suppresses the mod, so a player who sneaks while breaking a log gets the normal one-block vanilla break. Each extra block removed costs one point of durability on the axe, and the axe stops when it runs out. Loot is rolled from each block's loot table with the held tool considered, so Fortune and Silk Touch apply, and the results from the entire tree are combined into stacks as the block breaks. A maxBlocks setting bounds how much one break can remove, and an enabled entry in the config turns felling on or off.

TreeChopper is a server-side only mod, so only the server needs it and players join without installing anything. It is published for Fabric, Forge and NeoForge for 26.1 – 26.2, with Fabric API required on Fabric, and it is released under the MIT License without being open source. Across the six builds the felling logic is one shared codebase, so the result is the same on every loader. Only the entry point differs, and on Forge and NeoForge the config can be opened from the mods screen, while Fabric config values are edited in the file.