For Minecraft 1.21.1 / NeoForge.

Requirements: Java 21; NeoForge 21.1.248 or newer within 21.1.x.

Install this JAR on both clients and servers.

Simple Schematics 0.3.0

Added

• Printer batches: choose how many times to print, then stop automatically.
• Named placements: save and restore a schematic's position, rotation and settings.
• Shopping list HUD: pin missing materials and track them while gathering supplies.
• Inspect build: find missing or incorrect blocks, check frames, paintings and armor stands, and highlight issues in the world.
• Capture / export: save a selected area as a .schem file. Requires Creative mode and operator permissions. Exports blocks only, without inventories, saved block data or entities.
• Material presets: save block substitutions to reuse on other builds.
• Printer comparator output: read the printer's status with redstone.

Improved

• Faster material checks and smoother browsing of large schematic folders.
• Separate material checks for players in multiplayer.
• Clearer Rules results showing which changes were applied.

Fixed

• Delayed replies overwriting newer material settings or Rules edits.
• Inspection markers remaining after changing or clearing a preview.
• Incorrect rule buttons after filtering the Problems list.
• Large Rules lists failing to load.
• Tracking of already-paid entities when restarting a build after repeated rule changes.

Updating

• Install the matching JAR on both client and server. Fabric requires Fabric API.
• Finish or cancel active builds, collect owed returns and back up your world before updating.
• Unfinished jobs may need Recovery after updating. Restore a pre-update backup to downgrade.

Simple Schematics wiki