Blueprint Lab

Blueprint Lab adds a shared, isolated creative dimension where you can design and test builds without touching your real world. When you enter, your inventory, ender chest, XP, hunger and gamemode stay behind. The lab starts empty. When you leave, everything is restored and your build remains in the shared lab.

Nothing leaves with you — not items, not energy, not fluids. Cross-dimension transfer blocks can still be placed and configured for prototyping, but they are neutralized so they never actually move anything out. You take your work home by exporting a schematic.

Features

• Shared, flat, always-day creative lab (blueprintlab:lab)
• Full session swap: inventory, armor, offhand, ender chest, XP, food, gamemode, Curios slots
• No chunk force-loading — empty lab holds zero loaded chunks
• Transfer blocks (Mekanism Quantum Entangloporter, AE2 Quantum Bridge, Flux, RS, Ender Storage, …) stay placeable but do not tick
• Export to Create Schematic & Quill (.nbt) and vanilla structure files
• Block-entity inventories stripped on export by default, so items cannot leak through NBT
• Almost everything configurable in config/blueprintlab-server.toml
• Ban lists via config wildcards (modid:*) and datapack tags
• Optional KubeJS scripting API — no hard dependency

How to enter

All methods are optional and can be disabled in the config.

• Lab Terminal — right-click the block to toggle
• Lab Tablet — right-click the item to toggle
• Command — /blueprintlab enter, leave or toggle
• Keybind — default B

Isolation

Defense in depth, all driven by config and datapack tags:

• Your real gear never enters the lab
• Items handled in the lab are tagged; any that show up outside are vacuumed
• Chunk-loader tickets in the lab are rejected
• Known cross-dimension transfer blocks are neutralized (no tick) instead of banned from placement

Default banned-block coverage includes Mekanism, Applied Energistics 2, Refined Storage, Flux Networks, Ender Storage, Powah, Entangled and similar. Pack authors can extend or override this without a code update.

Compatibility

Built with Architectury for Minecraft 1.21.1 on NeoForge and Fabric. The only required dependencies are the loader and Architectury API.

Create, Mekanism, AE2, KubeJS, Curios and everything else are optional. The mod loads and runs without them. Create schematics work if Create is installed; Curios slots are swapped if Curios is present; KubeJS can hook enter/leave/place/export events if you want scripting.

Configuration

Tune entry methods, session swap fields, flat layers, isolation, ban lists and export formats in config/blueprintlab-server.toml. Reload with /blueprintlab reload.

Datapack tags:

• #blueprintlab:banned_blocks
• #blueprintlab:banned_items
• #blueprintlab:isolation_exempt_items

Commands

• /blueprintlab enter | leave | toggle
• /blueprintlab reload (admin)
• /blueprintlab clearlab (admin)

License

MIT