A Lua runtime for Fabric servers, with hot-reload. Edit scripts in config/ignis/, run /ignis reload, and changes apply instantly.

Full documentation at ignis.pyxiion.ru.

About

PxIgnis is developed in tandem with a fully Vanilla custom Roguelike server. The API reflects what the project itself needed.

Key Features

Hot-reload Lua runtime — /ignis reload re-runs scripts in milliseconds. Commands are re-registered into the live Brigadier dispatcher without restarting the server.
Command registration — register("cmd <name:type> [<name:type>]", handler, permission?). Built-in argument types: int, double, float, bool, text, word, player, block_pos, choice=.... Tab completion and permissions (admin.cmd) are part of the API.
Events, with cancellation — 15+ hooks: player_block_break, player_chat, player_attack_entity, entity_hurt, entity_death, and more. Returning false cancels.
Regions and scripted mob AI — spatial areas with enter/exit/move/death events, and API for custom mob AI.
Coroutines, persistence, UI — mc.fetch / mc.sleep for sequential async code, player.data / mc.data / storage backends for persistent state, plus holograms, sidebars, and the chestgui library for custom containers.

And more, and more.

Examples

1. Region + async

local arena = world:createRegion(vec(-50, 64, -50), vec(50, 80, 50)) arena:on("entity_enter", function(entity) if entity:isPlayer() then mc.broadcast(entity.name .. " entered the arena") coroutine.wrap(function() local res = mc.fetch("https://api.example.com/arena/log") if not res.ok then mc.broadcast("log failed: " .. res.error, true) end end)() end end)

2. Mob AI

--# nova syntax -- enabling cool custom syntax for trailing lambdas (just like Kotlin) mc.registerBehaviour("zombie_chase") \{ self, mob -> local p = mc.players[1] if p then local pos = p.pos mob:navigateTo(pos.x, pos.y, pos.z, 1.0) end } mc.on("entity_spawn", function(entity) if entity:isMob() and entity.type == "minecraft:zombie" then entity:setAI("zombie_chase") end end)

3. Command with permission

register("pay <amount:int> <target:player>", function(ctx, amount, target) ctx.player.data.balance = (ctx.player.data.balance or 0) - amount target.data.balance = (target.data.balance or 0) + amount target:sendMessage("Received " .. amount .. " from " .. ctx.player.name) end, "pxrp.economy")

Installation & Requirements

Install Fabric Loader ≥0.19.2, Fabric API ≥0.141.4+1.21.11, and Fabric Language Kotlin ≥1.10.8.
Place pxignis-*.jar into the mods/ folder of your server.
Start the server. config/ignis/demo.lua is created on first boot.
Edit scripts under config/ignis/, then run /ignis reload.