SCHEMA BUILDER · FAMILY LAN

Get ready to build.

A matching Minecraft profile for the family server. This website and its downloads are publicly available at https://minecraft.dokinetix.com/. Joining the game still requires the home LAN.

Java Edition 1.21.1NeoForge 21.1.256Mod 0.3.1

Download family profile Get Prism Launcher

Test beta on multiple PCs

A separate home-LAN development test client uses unique test names without Microsoft sign-in.

Beta test download and instructions

Install Prism and sign in

Install Prism Launcher from its website. In Settings → Accounts → Add Microsoft, sign in with your own account that owns Minecraft Java Edition. A parent can help with a child’s account.

Each person playing together needs their own account with Java Edition access. Owning Java and Bedrock on one account does not share Java Edition with the family. See Minecraft’s family-sharing guide.

The download page and our updater need no login. Microsoft handles game sign-in through the launcher; it may occasionally ask you to sign in again.

Import the family profile

Download the profile ZIP above. In Prism, choose Add Instance → Import and select the ZIP. Name the instance Schema Builder.

In Prism’s Java settings, enable Autodetect Java version and Auto-download Mojang Java. This profile needs Java 21. Prism downloads the matching game, loader and runtime from their upstream sources.

Play together

Launch Schema Builder. Choose Multiplayer → Schema Builder family LAN. Everyone must be on the home network.

If you need to add it manually, the address is 192.168.2.149:25565.

Craft one of the bricks below and right-click to throw. The structure’s front faces back toward you using your nearest cardinal direction when you throw. Looking up/down does not rotate it, and turning afterward does not change it. The original bridge runs across your throw direction. Try an open area first: the structure replaces blocks throughout its construction volume.

Update your existing 0.3.0 profile

Keep your existing profile for 0.3.1: Minecraft and NeoForge are unchanged. Close Minecraft and Prism, then run the Windows updater. In Prism, right-click your instance and open its folder first; use the folder containing mmc-pack.json.

Download Windows updater

.\Update-Client.ps1 -InstanceDirectory "C:\path\to\Schema Builder" -ReleaseUrl "https://minecraft.dokinetix.com/latest.json"

Run this in PowerShell from the folder where you saved the updater, replacing the instance path. It checks the game and loader versions, verifies the mod download, and backs up the previous mod. Your other mods, settings and saves stay in place.

For a game or loader change, import the new family profile into a separate instance. If Windows blocks a script, use the manual option below.

Plan the direction

Your direction is captured when you throw; diagonal looks snap to the nearest cardinal.
Facing at throw	Front faces	Bridge runs
North (−Z)	South (+Z), toward you	East–west
East (+X)	West (−X), toward you	North–south
South (+Z)	North (−Z), toward you	East–west
West (−X)	East (+X), toward you	North–south

Use Minecraft’s F3 facing display to plan a throw. The campsite’s front is its approach marker; the path turns into the tent doorway.

Twelve structures to throw

Combine one ordinary clay brick item with one ingredient below. Each shapeless recipe gives one custom brick.
Custom brick	Add to one clay brick
Lookout Hut	Stone-brick block
Footbridge	Oak-plank block
Timber Cabin	Birch-plank block
Guarded Watchtower	Cobblestone block
Garden Courtyard	Polished-andesite block
Birch Gazebo	Birch log
Glass Greenhouse	Glass block
Red Barn	Hay bale
Open Stable	Saddle
Brick Workshop	Crafting table
Stone Archway	Quartz block
Canvas Campsite	White wool block

The stable’s saddle comes from normal survival loot/trading. Find the new recipes in the recipe book after obtaining a regular clay brick. No operator powers are needed; each item tooltip explains how it faces toward you.

Tell Dad what went wrong

In Minecraft, type /fixitdad what happened. It saves your location, held items, nearby blocks and game setup. Wait for the saved report ID, click it to copy, and give it to Dad. He can retrieve the report and work through a fix with Codex.

First launch checks are still pending. This prototype profile has not yet been imported and joined from both player PCs. A parent should help with the first setup and confirm both players can join.

Manual setup, checksums and help

Already using the official launcher? Keep your existing isolated Minecraft 1.21.1 / NeoForge 21.1.256 / Java 21 profile. Close the game and launcher, move the older Schema Builder JAR outside mods, and copy the 0.3.1 mod into that folder. Keep unrelated mods. First-time users should create this isolated profile and launch it once before adding our mod.

If sign-in fails, finish setup in the official Minecraft Launcher and check Microsoft family multiplayer permissions with a parent. Each player needs Java Edition access. The updater supports the Prism profile above; official-launcher profiles use manual mod copying.

A version mismatch means you need the pinned profile, rather than the newest Minecraft release. Ask a parent before replacing an existing profile.