Hey, there is no issue, but can you please make this mod for version 1.8.9? I want to use it when I play Hypixel SkyBlock and I'm not used to hold sneak.

A 1.8.9 version is already made by the original author many years ago

https://www.reddit.com/r/hcfactions/comments/2utdu4/voila_togglesneak_v311_beta_for_forge_18