BuildTally

BuildTally shows what you still need for a build. It reads the material lists of your Litematica placements and shows them as free HUD windows. It counts what is in your target chests, your inventory and your backpacks, and it subtracts every block you have already placed.

Features: checklists per Litematica placement in scrollable HUD windows; any number of target chests (double chests count as one); counts your inventory, shulker boxes and Traveler's Backpack; placed blocks are subtracted from the list; lists stay visible in other dimensions; schematic editor (J: replace with R, delete with X, undo with Z); item replacement; build progress view; settings screen.

Optional server mod: install BuildTally on the server and the clients to also get chest scanning around you, shared lists and chest markers. Without it, everything above works on your own. Requirements: Fabric Loader, Fabric API, Java 25, Minecraft 26.3. Litematica, MaLiLib and Mod Menu are optional.