Blueprint Wand

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https://github.com/ArturOriginos/Bluwprint-Wand-Mode

A Minecraft 1.21.1 (NeoForge) mod. The Blueprint Wand selects an area of the world and saves the build into a plain-text JSON file that is easy to read for humans and AI assistants (e.g. Claude). Saved schematics can be previewed with a frame, rotated and pasted back.

Features

• “Blueprint Wand” item (looks like an enchanted stick). Recipe: stick + paper.
• Two-point selection; the selected area is outlined while you hold the wand.
• /schem save <name> writes schematics/<name>.json in the game folder.
• /schem preview <name> ... shows a yellow frame where the schematic will be placed, /schem confirm pastes it.
• Saved schematic names from the schematics folder are suggested automatically while typing /schem paste and /schem preview.
• /schem paste <name> ... pastes immediately, with optional rotation (90 / 180 / 270°).
• /schem undo reverts the last paste.
• Schematic List item (recipe: book + paper): right click to open a screen with every schematic from the folder (with sizes). Pick one, choose rotation, position (where you look / under you) and whether to clear air, press Preview (yellow frame), then open the list again and press Place. The buttons run the same /schem commands, so operator rights are required.
• Blocks are saved with all their properties (facing, half, waterlogged, …) plus a list of block-entity positions (chests, signs). Container contents, NBT and entities are not saved.
• English and Russian translations (assets/blueprintwand/lang).

Controls

The green frame is the whole area that will be saved. Maximum size: 1,000,000 blocks.

Commands

• The schematic’s minimum corner (lowest x, y, z) is placed at the target position, which defaults to the block you stand in. Coordinates can be relative (~ ~ ~) or the origin_world values from the file.
• Rotation turns the build clockwise; block states (stairs, doors, …) are rotated with it.
• with_air also pastes the air blocks of the schematic, clearing the area. Without it air is skipped.
• Pasting, preview and undo need operator rights (permission level 2; in singleplayer, cheats enabled).
• Blocks are placed without neighbour updates, so nothing pops off or falls during the paste. Blocks from missing mods are skipped and listed in chat.
• Undo does not restore chest contents or other block data.

Installation

Put the jar into the mods folder of the client (and of the server, if you play on one). The mod is required on both sides (NeoForge 1.21.1).