I Can't Believe It's Not 1.21.5

Craftmine is a fork from Minecraft 1.21.5's release candidates, hence, unlike previous April Fool's versions, closely resembles the codebase mods targetting 1.21.5 are working to. There are of course some differences, but it is these differences that this mod seeks to bridge.

Whilst far from an exact science of what is and isn't compatible, many mods will work straight away, providing any Minecraft version restrictions are bypassed.

Where a native port to Craftmine is available for a mod, it is sensible to check it out in favour of using this mod. These ports may have fallen behind their 1.21.5 counterpart over time however, which is where this mod shines, as you can use that 1.21.5 version with all its fixes. You Won't Believe It's Not 1.21.5 when you're done. Until you open your world and there's green letters instead of a sky.

Even if you feel no need to explore the additional breadth the previously 1.21.5-only mods can bring, there is more. This mod also adds back creative mode to the world creation screen and adds the player unlocks button to the creative inventory screen. Very convenient.