Schema Builder downloads

Install companion NPC support

Modern Companions 4.65 adds human companions to the live family server at 192.168.2.149:25565 and the authenticated beta server at 192.168.2.149:25566. Both use Schema Builder 0.4.0, Minecraft 1.21.1, NeoForge 21.1.256 and Java 21. Joining requires the home LAN and your usual Minecraft sign-in through Prism.

Download companion setup ZIP · ZIP checksum

  1. Keep separate Prism instances for live and authenticated beta. Use the matching existing instance, or import the live 0.4.0 profile or authenticated beta 0.4.0 profile first.
  2. Close Minecraft, Prism and all Java applications. Extract the companion setup ZIP.
  3. Open PowerShell in the extracted folder. Choose the matching command below and replace its sample path with that Prism instance folder containing mmc-pack.json. Run the installer once for each instance you use.
  4. After successful installation, use the matching Update & Play-Live.cmd or authenticated Update & Play-Beta.cmd shortcut. The usual updater updates Schema Builder only; install companion support once before joining either server.

Live · port 25565

powershell.exe -NoProfile -ExecutionPolicy Bypass -File .\Install-Companions-4.65.ps1 -InstanceDirectory "C:\Prism\instances\Schema Builder" -Channel live

Authenticated beta · port 25566

powershell.exe -NoProfile -ExecutionPolicy Bypass -File .\Install-Companions-4.65.ps1 -InstanceDirectory "C:\Prism\instances\Schema Builder Beta" -Channel beta

The helper downloads the unmodified author's mod directly from GitHub and checks its SHA-256. Internet access is needed for first install; repeating a successful install skips the download. Settings, saves, accounts and unrelated mods are preserved. Replaced companion JARs are backed up inside the instance's companions-backups folder.

Right-click an unrecruited companion with an empty hand to see what items they want. Give the requested items to recruit them, then right-click for controls such as following, patrolling or guarding. Experimental jobs may be hidden by default. Use features enabled by the server owner. No cloud AI account is required.

Use -Channel live for the live instance and -Channel beta for the authenticated beta instance. The installer refuses a profile already bound to a different channel. This setup is for those Prism profiles. Offline beta on port 25567 has no companion addition and keeps its existing development kit.

Author's release and attribution. This setup ZIP contains the installer and instructions; it does not bundle the third-party mod, skins, voices or game files.