Flat Lighting
A minimalist Fabric mod that disables the ambient occlusion effect, making in-game lighting more flat and uniform. Its action is similar to the "Old Lighting" setting set to OFF when using Optifine's built-in shaders.

The mod is completely standalone and doesn't require installation of any additional libraries, including Fabric API. Starting from version 1.2.0, it's fully compatible with the Sodium mod.
Thanks to its compact size and minimal requirements, the mod works on most Minecraft versions. Compatibility with specific versions can be checked in the description of each release.