Classic Faithful:

Minecraft Launcher:

Hello, my plan was to fork ClassicFaithful assets repositories and after lossless compression submit PRs but I figured I would ask first what do You think about it.

There is no downside to this and the resource pack size will just get smaller. The easiest way to achieve this would be to just use GitHub Imgbot as it doesn't require any actions from You other than adding it to the repo with one or two clicks. Imgbot however doesn't do the job as good (still better than nothing) as the tools I use: Leanify and Oxipng.

Can I proceed or do You prefer to do it by yourself / not interested at all?

I'd fix this myself but It's only an issue to people in creative mode and I have no idea /how/ to fix it.