Using pickaxes, you can now crack certain blocks into different ones! In a chain, you can get back some of the resources used to make what you're cracking down. Stone Bricks can be cracked into Cracked Stone Bricks. Then they can be cracked into Stone. Then Cobblestone! Then you can do it all again.
Shovels get the same function, but instead of cracking, they can grind! Stone into gravel, gravel to sand. Allowing the farming of sand or gravel, and making them renewable!
Sticks are the last thing to get a major update, they can be used to chisel certain blocks!
The three recipes in the mod, cracking, grinding, and chiseling are all data-driven and customizable in a data pack or addon mod.
