Rework demo

demo/src/ReplicatedStorage/start.luau

@@ -2,18 +2,16 @@ local ReplicatedStorage = game:GetService("ReplicatedStorage")
 local RunService = game:GetService("RunService")
 local UserInputService = game:GetService("UserInputService")
 local jabby = require(ReplicatedStorage.Packages.jabby)
-local std = require(ReplicatedStorage.std)
-local Scheduler = std.Scheduler
-local world = std.world
+local std = ReplicatedStorage.std
+local scheduler = require(std.scheduler)
+local world = require(std.world)
 
 local function start(modules)
-	local scheduler = Scheduler.new(world, require(ReplicatedStorage.std.components))
 	for _, module in modules do
-		require(module)(scheduler)
+		require(module)
 	end
-	local events = scheduler.collect.all()
-	scheduler.systems.begin(events)
-
+	local events = scheduler.COLLECT()
+	scheduler.BEGIN(events)
 	jabby.set_check_function(function(player)
 		return true
 	end)

demo/src/ReplicatedStorage/std/bt.luau

@@ -3,15 +3,15 @@
 
 -- original author @centau
 
-local SUCCESS = 0
-local FAILURE = 1
-local RUNNING = 2
+local FAILURE = -1 
+local RUNNING = 0 
+local SUCCESS = 1 
 
 local function SEQUENCE(nodes)
 	return function(...)
 		for _, node in nodes do
 			local status = node(...)
-			if status == FAILURE or status == RUNNING then
+			if status <= RUNNING  then
 				return status
 			end
 		end
@@ -23,7 +23,7 @@ local function FALLBACK(nodes)
 	return function(...)
 		for _, node in nodes do
 			local status = node(...)
-			if status == SUCCESS or status == RUNNING then
+			if status > FAILURE then
 				return status
 			end
 		end

demo/src/ReplicatedStorage/std/components.luau

@@ -8,7 +8,7 @@ local components: {
 	Model: Entity<Model>,
 	Player: Entity,
 	Target: Entity,
-	Transform: Entity<CFrame>,
+	Transform: Entity<{ new: CFrame, old: CFrame }>,
 	Velocity: Entity<number>,
 	Previous: Entity,
 } =
@@ -23,4 +23,8 @@ local components: {
 		Previous = world:component(),
 	}
 
+for name, component in components :: {[string]: jecs.Entity} do 
+	world:set(component, jecs.Name, name)
+end
+
 return table.freeze(components)

demo/src/ReplicatedStorage/std/interval.luau

@@ -16,4 +16,4 @@ local function interval(s)
 	return throttle
 end
 
-return interval
+return interval

demo/src/ReplicatedStorage/std/phases.luau

@@ -0,0 +1,14 @@
+local std = game:GetService("ReplicatedStorage").std
+local Players = game:GetService("Players")
+
+local scheduler = require(std.scheduler)
+local PHASE = scheduler.PHASE
+
+return {
+    PlayerAdded = PHASE({
+        event = Players.PlayerAdded
+    }),
+    PlayerRemoved = PHASE({
+        event = Players.PlayerRemoving
+    })
+}

demo/src/ReplicatedStorage/std/ref.luau

@@ -1,24 +1,26 @@
-local handle = require(script.Parent.handle)
 local world = require(script.Parent.world)
-local refs = {}
+local jecs = require(game:GetService("ReplicatedStorage").ecs)
+local refs: {[any]: jecs.Entity} = {}
 
-local function fini(key)
+local function fini(key): () -> ()
 	return function()
 		refs[key] = nil
 	end
 end
 
-local function ref(key): (handle.Handle, (() -> ())?)
+local function noop() end
+
+local function ref(key): (jecs.Entity, () -> ())
 	if not key then
-		return handle(world:entity())
+		return world:entity(), noop
 	end
 	local e = refs[key]
 	if not e then
 		e = world:entity()
 		refs[key] = e
 	end
 	-- Cannot cache handles because they will get invalidated
-	return handle(e), fini(key)
+	return e, fini(key)
 end
 
 return ref