Initial commit

src/action.luau

@@ -0,0 +1,25 @@
+type Action = {
+    priority: number,
+    callback: (Instance) -> ()
+}
+
+local ActionMT = {}
+
+local function is_action(v: any)
+    return getmetatable(v) == ActionMT
+end
+
+local function action(callback: (Instance) -> (), priority: number?): Action
+    local t = {
+        priority = priority or 1,
+        callback = callback
+    }
+
+    setmetatable(t :: any, ActionMT)
+
+    return t
+end
+
+return function()
+    return action, is_action
+end