Hermes Bridge

Hermes Bridge is a server-side NeoForge mod for Minecraft 1.21.1 that lets players talk to an external Hermes-powered assistant directly from in-game chat and commands — without requiring any client-side installation. Built for multiplayer servers, Hermes Bridge captures live server context, sends structured requests to an external bridge service, and returns short Minecraft-friendly responses. It supports both normal player questions and a separate admin lane for server staff, while keeping the actual permission checks on the Minecraft server where they belong.

Features

• Server-side only
  • No custom client mod required
  • Works through vanilla chat and Brigadier commands

• Talk to Hermes in-game
  • Chat trigger: @Spike <question>
  • Slash command: /spike ask <prompt>

• Admin request mode
  • Chat trigger: @Spike admin <request>
  • Slash command: /spike admin <prompt>

• Local permission enforcement
  • The external AI is not trusted to grant privileges
  • The mod enforces admin authorization locally before any privileged action can run

• Optional command execution flow
  • Admin-mode responses can suggest or return commands
  • Execution is still guarded by server-side config and permission rules

• Structured bridge integration
  • Sends live server/player context to an external Hermes bridge service
  • Receives strict JSON responses designed for Minecraft chat

• Operational controls
  • /spike status
  • /spike reload

Why this mod exists

Most “AI in Minecraft” ideas either shove too much logic into the mod itself or ignore security boundaries entirely. Hermes Bridge keeps the Java side focused on what it should actually own:

• chat + command integration
• context capture
• permission checks
• execution guardrails (1/3)

 

• safe transport to an external assistant service

That means the AI side can evolve separately without turning your server mod into a bloated mess.

Important

This mod requires an external Hermes bridge service to actually answer requests.
By itself, the mod provides the Minecraft-side integration and security boundary — not the AI runtime.

Supported Version

• Minecraft: 1.21.1
• NeoForge: 21.1.222