### Create Startup System

Source: https://github.com/yetanotherclown/planck/blob/main/docs/setup_guides/matter.md

Defines a system that runs specifically during the 'Startup' phase of the Planck scheduler, suitable for initial setup logic.

```lua
```lua
local Matter = require("@packages/Matter")

local Planck = require("@packages/Planck")
local Phase = Planck.Phase

local components = require("@shared/components")

local function systemA(world)
    -- Runs only once before all other Phases
end

return {
    system = systemA,
    phase = Phase.Startup
}
```
```

--------------------------------

### Create Planck Scheduler

Source: https://github.com/yetanotherclown/planck/blob/main/docs/setup_guides/matter.md

Initializes and exports a Planck Scheduler, responsible for managing and executing game logic systems.

```lua
```lua
local Planck = require("@packages/Planck")
local Scheduler = Planck.Scheduler

local scheduler = scheduler.new()

return scheduler
```
```

--------------------------------

### Startup Function Implementation

Source: https://github.com/yetanotherclown/planck/blob/main/docs/setup_guides/matter.md

Provides the main startup function that initializes the scheduler, adds systems, and sets up debugging tools.

```lua
```lua
local scheduler = require("@shared/scheduler")
local world = require("@shared/world")

return function(systems)
    if #systems ~= 0 then
        scheduler:addSystems(systems) -- Assuming you're using SystemTables!
    end
end
```
```

--------------------------------

### Create Matter World

Source: https://github.com/yetanotherclown/planck/blob/main/docs/setup_guides/matter.md

Initializes and exports a Matter World instance, serving as the core simulation environment for entities and components.

```lua
```lua
local Matter = require("@packages/Matter")
local World = Matter.World

local world = World.new()

return world
```
```

--------------------------------

### Initialize Scheduler with World

Source: https://github.com/yetanotherclown/planck/blob/main/docs/setup_guides/matter.md

Configures the Planck Scheduler by passing the Matter World instance to its constructor, linking the scheduler to the simulation environment.

```lua
```lua
local Planck = require("@packages/Planck")
local Scheduler = Planck.Scheduler

local world = require("@shared/world")

local scheduler = scheduler.new(world)

return scheduler
```
```

--------------------------------

### ServerScriptService/server/server.server.luau

Source: https://github.com/yetanotherclown/planck/blob/main/docs/setup_guides/matter.md

This Lua script configures server-side systems for a Roblox game. It loads shared systems and server-specific modules from ReplicatedStorage, aggregates them, and passes them to a startup function for initialization.

```lua
local ReplicatedStorage = game:GetService("ReplicatedStorage")

local startup = require("@shared/startup")

local systems = {}

local function addSystems(folder)
    for _, system in folder:GetChildren() do
        if not system:IsA("ModuleScript") then
            continue
        end

        table.insert(systems, require(system))
    end
end

addSystems(ReplicatedStorage.shared.systems)
addSystems(ReplicatedStorage.server.systems)

startup(systems)
```

--------------------------------

### ReplicatedStorage/client/client.client.luau

Source: https://github.com/yetanotherclown/planck/blob/main/docs/setup_guides/matter.md

This Lua script sets up client-side systems for a Roblox game. It requires shared and client-specific modules from ReplicatedStorage, adds them to a list, and then initializes them using a startup function.

```lua
local ReplicatedStorage = game:GetService("ReplicatedStorage")

local startup = require("@shared/startup")

local systems = {}

local function addSystems(folder)
    for _, system in folder:GetChildren() do
        if not system:IsA("ModuleScript") then
            continue
        end

        table.insert(systems, require(system))
    end
end

addSystems(ReplicatedStorage.shared.systems)
addSystems(ReplicatedStorage.client.systems)

startup(systems)
```

--------------------------------

### wally.toml Dependencies

Source: https://github.com/yetanotherclown/planck/blob/main/docs/setup_guides/matter.md

Defines project dependencies using the Wally package manager, including Matter, Planck, and related debugger/hooks packages.

```toml
```toml
[dependencies]
Matter = "matter-ecs/matter@0.8.4"
Planck = "yetanotherclown/planck@0.2.0"
PlanckMatterDebugger = "yetanotherclown/planck-matter-debugger@0.2.0"
PlanckMatterHooks = "yetanotherclown/planck-matter-hooks@0.2.1"
```
```

--------------------------------

### Create Normal System

Source: https://github.com/yetanotherclown/planck/blob/main/docs/setup_guides/matter.md

Defines a standard system function that will be executed by the Planck scheduler without a specific phase constraint.

```lua
```lua
local function systemB(world)
    -- ...
end

return systemB
```
```

--------------------------------

### Create New Scheduler

Source: https://github.com/yetanotherclown/planck/blob/main/docs/getting_started/scheduler.md

Demonstrates the basic setup for creating a new Scheduler instance in Planck. This is the minimal initialization required, with no explicit start or initialization methods.

```lua
local Planck = require("@packages/Planck")
local Scheduler = Planck.Scheduler

local scheduler = Scheduler.new()
```

--------------------------------

### Add Plugins to Scheduler

Source: https://github.com/yetanotherclown/planck/blob/main/docs/setup_guides/matter.md

Configures the Planck Scheduler by adding Matter plugins like HooksPlugin and DebuggerPlugin, enhancing functionality and debugging capabilities.

```lua
```lua
local Matter = require("@packages/Matter")
local Plasma = require("@packages/Plasma")

local Planck = require("@packages/Planck")
local Scheduler = Planck.Scheduler

local world = require("@shared/world")

local DebuggerPlugin = require("@packages/DebuggerPlugin")
local debuggerPlugin = DebuggerPlugin.new({ world })

local debugger = Matter.Debugger.new(Plasma)
local widgets = debugger:getWidgets()

local HooksPlugin = require("@packages/HooksPlugin")
local hooksPlugin = HooksPlugin.new()

local scheduler = scheduler.new(world, widgets)
    :addPlugin(hooksPlugin)
    :addPlugin(debuggerPlugin)

debugger:autoInitialize(debuggerPlugin:getLoop())

return scheduler
```
```

--------------------------------

### Wally Installation

Source: https://github.com/yetanotherclown/planck/blob/main/docs/getting_started/introduction.md

Installs the Planck library using Wally, a package manager for Roblox development. This dependency declaration ensures Planck is available for use in your project.

```toml
[dependencies]
Planck = "yetanotherclown/planck@0.2.0"
```

--------------------------------

### Define Matter Components

Source: https://github.com/yetanotherclown/planck/blob/main/docs/setup_guides/matter.md

Defines custom Matter components within a module, registering them with Matter for use in entities.

```lua
```lua
local Matter = require("@packages/Matter")

return {
    MyComponent = Matter.component("myComponent"),
}
```
```

--------------------------------

### Setup Scheduler with PlanckRunService Plugin (Lua)

Source: https://github.com/yetanotherclown/planck/blob/main/docs/plugins/runservice.md

This Lua code demonstrates the initial setup for the Planck scheduler. It involves requiring the Planck core library and the PlanckRunService plugin, instantiating the plugin, and adding it to a new scheduler instance.

```lua
```lua
local Planck = require("@packages/Planck")
local Scheduler = Planck.Scheduler

local world = require("@shared/world")

local PlanckRunService = require("@packages/PlanckRunService")
local runServicePlugin = PlanckRunService.new()

local scheduler = scheduler.new(world)
    :addPlugin(runServicePlugin)

return scheduler
```
```

--------------------------------

### PlanckRunService Plugin Installation

Source: https://github.com/yetanotherclown/planck/blob/main/docs/getting_started/phases.md

Provides the TOML dependency declaration required to install the PlanckRunService plugin using Wally, which adds RunService-based phases and pipelines.

```toml
[dependencies]
PlanckRunService = "yetanotherclown/planck-runservice@0.2.0"
```

--------------------------------

### Install PlanckRunService Plugin (TOML)

Source: https://github.com/yetanotherclown/planck/blob/main/docs/plugins/runservice.md

This snippet shows how to add the PlanckRunService plugin as a dependency in your project's wally.toml file. It specifies the package name and version required for installation.

```toml
```toml
[dependencies]
PlanckRunService = "yetanotherclown/planck-runservice@0.2.0"
```
```

--------------------------------

### Setup Matter Debugger Scheduler

Source: https://github.com/yetanotherclown/planck/blob/main/docs/plugins/matter_debugger.md

This Lua code demonstrates setting up a scheduler with the Matter Debugger plugin. It initializes the debugger and adds the plugin to the scheduler, returning the configured scheduler instance.

```luau
local ReplicatedStorage = game:GetService("ReplicatedStorage")

local Matter = require("@packages/Matter")
local Plasma = require("@packages/Plasma")

local Planck = require("@packages/Planck")
local Scheduler = Planck.Scheduler

local world = require("@shared/world")

local DebuggerPlugin = require("@packages/DebuggerPlugin")
local debuggerPlugin = DebuggerPlugin.new({ world })

local debugger = Matter.Debugger.new(Plasma)
local widgets = debugger:getWidgets()

local scheduler = scheduler.new(world, widgets)
    :addPlugin(debuggerPlugin)

debugger:autoInitialize(debuggerPlugin:getLoop())

return scheduler
```

--------------------------------

### Serve Project with Rojo

Source: https://github.com/yetanotherclown/planck/blob/main/CONTRIBUTING.md

Start a development server for the project using Rojo. This allows tests to run and output results directly when the server is active in Roblox Studio, without direct CLI invocation for testing.

```bash
#!/bin/bash

# This script is a placeholder for the actual development server startup logic.
# It assumes Rojo is installed and configured for the project.

echo "Serving project with Rojo using scripts/dev.sh..."
# Example command (actual command may vary):
# ./scripts/dev.sh

echo "Development server started. Check Studio for test results."
```

--------------------------------

### Install Debugger Plugin

Source: https://github.com/yetanotherclown/planck/blob/main/docs/plugins/matter_debugger.md

This snippet shows how to add the DebuggerPlugin dependency to your project's wally.toml file for installation.

```toml
[dependencies]
DebuggerPlugin = "yetanotherclown/planck-matter-debugger@0.2.0"
```

--------------------------------

### Scheduler Setup with Jabby Plugin

Source: https://github.com/yetanotherclown/planck/blob/main/docs/plugins/jabby.md

Demonstrates how to initialize the Planck Scheduler and add the Jabby Plugin to it. This Lua code sets up the scheduler for use with the Jabby debugger, requiring the Planck and PlanckJabby packages.

```luau
local Planck = require("@packages/Planck")
local Scheduler = Planck.Scheduler

local world = require("@shared/world")

local PlanckJabby = require("@packages/PlanckJabby")
local jabbyPlugin = PlanckJabby.new()

local scheduler = scheduler.new(world)
    :addPlugin(jabbyPlugin)

return scheduler
```

--------------------------------

### Setup Scheduler with Matter Hooks Plugin and Reference (Lua)

Source: https://github.com/yetanotherclown/planck/blob/main/docs/plugins/matter_hooks.md

This Luau snippet demonstrates initializing the Matter Hooks plugin with an explicit reference to the Matter library, which is useful when the plugin cannot automatically locate it. It then adds this configured plugin to the Planck Scheduler.

```lua
local ReplicatedStorage = game:GetService("ReplicatedStorage")

local Planck = require("@packages/Planck")
local Scheduler = Planck.Scheduler

local MatterHooks = require("@packages/MatterHooks")
local hooksPlugin = MatterHooks.new(ReplicatedStorage.Matter)

local scheduler = scheduler.new()
    :addPlugin(hooksPlugin)

return scheduler
```

--------------------------------

### Install Planck with Wally

Source: https://github.com/yetanotherclown/planck/blob/main/README.md

This snippet shows how to add Planck as a dependency to your project using Wally, a package manager for Luau. It specifies the package name and version required for installation.

```TOML
[dependencies]
Planck = "yetanotherclown/planck@0.2.0"
```

--------------------------------

### Setup Scheduler with Matter Hooks Plugin (Lua)

Source: https://github.com/yetanotherclown/planck/blob/main/docs/plugins/matter_hooks.md

This Luau snippet illustrates the process of creating a Planck Scheduler and adding the Matter Hooks plugin to it. It requires importing both Planck and the MatterHooks package.

```lua
local Planck = require("@packages/Planck")
local Scheduler = Planck.Scheduler

local MatterHooks = require("@packages/MatterHooks")
local hooksPlugin = MatterHooks.new()

local scheduler = scheduler.new()
    :addPlugin(hooksPlugin)

return scheduler
```

--------------------------------

### Install Matter Hooks Plugin (TOML)

Source: https://github.com/yetanotherclown/planck/blob/main/docs/plugins/matter_hooks.md

This snippet shows how to add the Matter Hooks plugin as a dependency in a `wally.toml` file. It specifies the package name and version required for installation.

```toml
[dependencies]
MatterHooks = "yetanotherclown/planck-matter-hooks@0.2.1"
```

--------------------------------

### On Event Condition (Basic)

Source: https://github.com/yetanotherclown/planck/blob/main/docs/design/conditions.md

Sets up a system to run when a specific event occurs, such as `Players.PlayerAdded`. This example shows how to define the condition.

```lua
local Planck = require("@packages/Planck")

local Scheduler = Planck.Scheduler
local onEvent = Planck.onEvent

local scheduler = Scheduler.new(world)
    -- Run out system only when there is a new Player
    :addRunCondition(systemA, onEvent(Players.PlayerAdded))
```

--------------------------------

### Use Matter Hooks in System (Lua)

Source: https://github.com/yetanotherclown/planck/blob/main/docs/plugins/matter_hooks.md

This Luau code demonstrates how to import and utilize hooks provided by the Matter Hooks plugin within a system. It shows examples of using `useThrottle`, `useDeltaTime`, and `useEvent`.

```lua
local MatterHooks = require("@packages/MatterHooks")

local useDeltaTime = MatterHooks.useDeltaTime
local useEvent = MatterHooks.useEvent
local useThrottle = MatterHooks.useThrottle

function systemA()
    if useThrottle(5) then
        print("Throttled for 5 seconds")
    end
end

return systemA
```

--------------------------------

### Using Built-in Startup Phases

Source: https://github.com/yetanotherclown/planck/blob/main/docs/getting_started/phases.md

Illustrates how to access and use Planck's predefined startup phases (PreStartup, Startup, PostStartup). These phases are executed once at the beginning of the application lifecycle, before the main game loop.

```lua
local Planck = require("@packages/Planck")
local Phase = Planck.Phase

local PreStartup = Phase.PreStartup
local Startup = Phase.Startup
local PostStartup = Phase.PostStartup
```

--------------------------------

### Define Planck/Jecs Startup System A

Source: https://github.com/yetanotherclown/planck/blob/main/docs/setup_guides/jecs.mdx

Sets up initial entities and components using Planck and Jecs. It configures entities with names and food quantities, and associates them with specific components for the Startup phase.

```lua
local Jecs = require("@packages/Jecs")
local pair = Jecs.pair

local Planck = require("@packages/Planck")
local Phase = Planck.Phase

local components = require("@shared/components")

local Name = components.Name
local Eats = components.Eats
local Apples = components.Apples
local Oranges = components.Oranges

local function systemA(world)
    world:set(Apples, Name, "apples")
    world:set(Oranges, Name, "oranges")

    local bob = world:entity()
    world:set(bob, pair(Eats, Apples), 10)
    world:set(bob, pair(Eats, Oranges), 5)
    world:set(bob, Name, "bob")

    local alice = world:entity()
    world:set(alice, pair(Eats, Apples), 4)
    world:set(alice, Name, "alice")
end

return {
    system = systemA,
    phase = Phase.Startup
}
```

--------------------------------

### Implement Planck/Jabby Startup Function

Source: https://github.com/yetanotherclown/planck/blob/main/docs/setup_guides/jecs.mdx

Initializes the application by adding systems to the scheduler and setting up Jabby for client-side interaction. It includes logic for binding a key to spawn an app and registering the world with Jabby.

```lua
local Jabby = require("@packages/Jabby")

local scheduler = require("@shared/scheduler")
local world = require("@shared/world")

return function(systems)
    if #systems ~= 0 then
        scheduler:addSystems(systems) -- Assuming you're using SystemTables!
    end

    if RunService:IsClient() then
		local client = Jabby.obtain_client()

		local function createWidget(_, state: Enum.UserInputState)
			if state ~= Enum.UserInputState.Begin then
				return
			end

			client.spawn_app(client.apps.home, nil)
		end

		ContextActionService:BindAction("Open Jabby", createWidget, false, Enum.KeyCode.F4)
	end

    Jabby.register({
        applet = Jabby.applets.world,
        name = "Jecs World",
        configuration = {
            world = world
        }
    })
end
```

--------------------------------

### Load Client Systems with Startup

Source: https://github.com/yetanotherclown/planck/blob/main/docs/setup_guides/jecs.mdx

Loads shared and client-specific systems from folders and passes them to the main startup function. This script runs on the client to initialize client-side logic and systems.

```lua
local ReplicatedStorage = game:GetService("ReplicatedStorage")

local startup = require("@shared/startup")

local systems = {}

local function addSystems(folder)
    for _, system in folder:GetChildren() do
        if not system:IsA("ModuleScript") then
            continue
        end

        table.insert(systems, require(system))
    end
end

addSystems(ReplicatedStorage.shared.systems)
addSystems(ReplicatedStorage.client.systems)

startup(systems)
```

--------------------------------

### Add System Set to Scheduler (Lua)

Source: https://github.com/yetanotherclown/planck/blob/main/docs/getting_started/systems.md

Demonstrates how to group multiple systems into a set (an array) and add them to the scheduler simultaneously using the `addSystems` method. This is useful for bulk registration and managing related systems.

```lua
-- ...

local systemA = require("@shared/systems/systemA")
local systemB = require("@shared/systems/systemB")

local systemSet = { systemA, systemB }

local scheduler = Scheduler.new(world, state)
    :addSystems(systemSet)
```

--------------------------------

### Add System to Scheduler (Lua)

Source: https://github.com/yetanotherclown/planck/blob/main/docs/getting_started/systems.md

Shows how to instantiate a Scheduler and add a previously defined system to it. The scheduler manages the execution of these systems, often passing world and state data to them.

```lua
-- ...

local systemA = require("@shared/systems/systemA")

local scheduler = Scheduler.new(world, state)
    :addSystem(systemA)
```

--------------------------------

### Time Passed Condition

Source: https://github.com/yetanotherclown/planck/blob/main/docs/design/conditions.md

Uses the built-in `timePassed` condition to execute a system at a specified interval, for example, every 10 seconds.

```lua
local Planck = require("@packages/Planck")

local Scheduler = Planck.Scheduler
local timePassed = Planck.timePassed

local scheduler = Scheduler.new(world)
    :addRunCondition(systemA, timePassed(10)) -- Run every 10 seconds
```

--------------------------------

### Create Scheduler with State

Source: https://github.com/yetanotherclown/planck/blob/main/docs/getting_started/scheduler.md

Illustrates how to initialize the Scheduler by passing state, such as a Jecs World and custom data, directly into the Scheduler.new() function.

```lua
local Planck = require("@packages/Planck")
local Scheduler = Planck.Scheduler

local Jecs = require("@packages/Jecs")
local World = Jecs.World

local world = World.new()
local state = {}

local scheduler = Scheduler.new(world, state)
```

--------------------------------

### Define System using SystemTable (Lua)

Source: https://github.com/yetanotherclown/planck/blob/main/docs/getting_started/systems.md

Explains how to define a system using a SystemTable, which is a more structured approach. A SystemTable can include the system function itself, along with optional metadata like a name, phase, and run conditions for advanced control.

```lua
local function systemA(world, state)
    -- ...
end

local function condition(world, state)
    if someCondition then
        return true
    else
        return false
    end
end

return {
    name = "systemA",
    system = systemA,
    phase = Planck.Phase.PreUpdate,
    runConditions = { condition }
}
```

--------------------------------

### Load Server Systems with Startup

Source: https://github.com/yetanotherclown/planck/blob/main/docs/setup_guides/jecs.mdx

Loads shared and server-specific systems from folders and passes them to the main startup function. This script runs on the server to initialize server-side logic and systems.

```lua
local ReplicatedStorage = game:GetService("ReplicatedStorage")

local startup = require("@shared/startup")

local systems = {}

local function addSystems(folder)
    for _, system in folder:GetChildren() do
        if not system:IsA("ModuleScript") then
            continue
        end

        table.insert(systems, require(system))
    end
end

addSystems(ReplicatedStorage.shared.systems)
addSystems(ReplicatedStorage.server.systems)

startup(systems)
```

--------------------------------

### Create and Add Phase to Scheduler

Source: https://github.com/yetanotherclown/planck/blob/main/docs/getting_started/phases.md

Demonstrates how to create a new Phase instance and add it to the Planck Scheduler, associating a system with this phase. This is a fundamental step in organizing system execution order.

```lua
local Planck = require("@packages/Planck")
local Scheduler = Planck.Scheduler
local Phase = Planck.Phase

-- ...

local systemA = require("@shared/systems/systemA")

local myPhase = Phase.new("myPhase")

local scheduler = Scheduler.new(world, state)
    :insert(myPhase)
    :addSystem(systemA, myPhase)
```

--------------------------------

### Initialize Planck Scheduler

Source: https://github.com/yetanotherclown/planck/blob/main/README.md

Demonstrates the initialization of the Planck Scheduler, which is the core component for managing systems and their execution order. It requires a World object and a state object.

```luau
local Planck = require("@packages/Planck")
local Scheduler = Planck.Scheduler

local Jecs = require("@packages/Jecs")
local World = Jecs.World

local world = World.new()
local state = {}

local scheduler = Scheduler.new(world, state)
```

--------------------------------

### Lua: Scheduler explicit phase dependency (insertBefore)

Source: https://github.com/yetanotherclown/planck/blob/main/docs/getting_started/order.md

Demonstrates how to explicitly define an execution order using `insertBefore`. This ensures that `phaseB` will run immediately before `phaseA`.

```lua
local scheduler = Scheduler.new()
    :insert(phaseA)
    :insertBefore(phaseB, phaseA)
    :runAll()

-- phaseB runs before phaseA
```

--------------------------------

### Create and Schedule Lua Phases and Pipelines

Source: https://github.com/yetanotherclown/planck/blob/main/docs/design/phases-and-pipelines.md

Demonstrates how to define custom Phases, group them into a Pipeline, and then schedule the entire Pipeline to run on a specific event using the Planck framework. This approach simplifies managing multiple related execution steps.

```lua
local Phase = Planck.Phase
local Pipeline = Planck.Pipeline
local Scheduler = Planck.Scheduler

local PreUpdate = Phase.new()
local Update = Phase.new()
local PostUpdate = Phase.new()

local UpdatePipeline = Pipeline.new()
	:insert(PreUpdate)
	:insert(Update)
	:insert(PostUpdate)

local scheduler = scheduler.new(world)
    :insert(UpdatePipeline, RunService, "Heartbeat")
```

--------------------------------

### Lua: Scheduler system insertion order

Source: https://github.com/yetanotherclown/planck/blob/main/docs/getting_started/order.md

Illustrates how Systems are ordered within a Planck Scheduler. Systems are ordered strictly by their insertion sequence, without explicit dependency management.

```lua
local scheduler = Scheduler.new()
    :addSystem(systemA)
    :addSystem(systemB)
    :runAll()

-- systemA runs before systemB
```

--------------------------------

### Accessing RunService Pipelines

Source: https://github.com/yetanotherclown/planck/blob/main/docs/getting_started/phases.md

Demonstrates how to require the PlanckRunService plugin and access its predefined Pipelines, which correspond to various Roblox RunService events like PreRender, PreSimulation, and Heartbeat.

```lua
local PlanckRunService = require("@packages/PlanckRunService")

local Pipelines = PlanckRunService.Pipelines

local PreRender = Pipelines.PreRender
local PreAnimation = Pipelines.PreAnimation
local PreSimulation = Pipelines.PreSimulation
local PostSimulation = Pipelines.PostSimulation
local Heartbeat = Pipelines.Heartbeat
```

--------------------------------

### Create and Use Pipelines

Source: https://github.com/yetanotherclown/planck/blob/main/README.md

Demonstrates the creation of Pipelines, which are ordered collections of Phases. This helps in organizing related phases and scheduling them to run at specific times, often tied to engine events like 'Heartbeat'.

```luau
local Phase = Planck.Phase
local Pipeline = Planck.Pipeline
local Scheduler = Planck.Scheduler

-- Define phases (can be custom or built-in)
local PreUpdate = Phase.new("PreUpdate")
local Update = Phase.new("Update")
local PostUpdate = Phase.new("PostUpdate")

-- Create a pipeline and insert phases in order
local UpdatePipeline = Pipeline.new()
    :insert(PreUpdate)
    :insert(Update)
    :insert(PostUpdate)

-- Assuming 'scheduler' is an initialized Scheduler instance
-- and 'RunService' is an object providing engine events
-- local RunService = ... 

scheduler:insert(UpdatePipeline, RunService, "Heartbeat") -- Schedule the pipeline to run on Heartbeat
```

--------------------------------

### Create Planck Scheduler

Source: https://github.com/yetanotherclown/planck/blob/main/docs/setup_guides/jecs.mdx

Initializes a new Planck Scheduler instance in `scheduler.luau`, responsible for managing systems and plugins.

```lua
local Planck = require("@packages/Planck")
local Scheduler = Planck.Scheduler

local scheduler = Scheduler.new()

return scheduler

```

--------------------------------

### Lua: Scheduler basic insertion order

Source: https://github.com/yetanotherclown/planck/blob/main/docs/getting_started/order.md

Demonstrates the default ordering behavior of custom Pipelines or Phases when added sequentially to a Planck Scheduler. The last added item becomes a dependency of the next, ensuring sequential execution.

```lua
local scheduler = Scheduler.new()
    :insert(phaseA)
    :insert(phaseB)
    :runAll()

-- phaseA will run before phaseB
```

--------------------------------

### Define System Function with Parameters (Lua)

Source: https://github.com/yetanotherclown/planck/blob/main/docs/getting_started/systems.md

Illustrates a system function designed to accept parameters, typically the world state and custom state data managed by the scheduler. This allows systems to interact with the game's data.

```lua
local function systemA(world, state) -- ... end

return systemA
```

--------------------------------

### Lua: Scheduler explicit phase dependency (insertAfter)

Source: https://github.com/yetanotherclown/planck/blob/main/docs/getting_started/order.md

Shows how to explicitly define a dependency between two Phases using `insertAfter`. This ensures that `phaseB` will only run after `phaseA` has completed.

```lua
local scheduler = Scheduler.new()
    :insert(phaseA)
    :insertAfter(phaseB, phaseA)
    :runAll()

-- phaseB depends on phaseA and runs after it
```

--------------------------------

### Lua: Scheduler grouping by events

Source: https://github.com/yetanotherclown/planck/blob/main/docs/getting_started/order.md

Illustrates how to group Pipelines or Phases by specific events, such as `RunService.Heartbeat` or `RunService.PostSimulation`. The scheduler processes all items in one group before moving to the next group, maintaining internal order within each group.

```lua
local scheduler = Scheduler.new()
    :insert(pipelineA, RunService.Heartbeat)
    :insertAfter(pipelineB, RunService.PostSimulation)
    :runAll()

-- Processes Heartbeat group, then PostSimulation group
```

--------------------------------

### Define a Basic System Function (Lua)

Source: https://github.com/yetanotherclown/planck/blob/main/docs/getting_started/systems.md

Demonstrates the fundamental way to define a system as a standalone function within a ModuleScript. This function represents a single unit of logic that can be executed by the scheduler.

```lua
local function systemA() -- ... end

return systemA
```

--------------------------------

### Test Runner Configuration (run-tests.luau)

Source: https://github.com/yetanotherclown/planck/blob/main/CONTRIBUTING.md

Configuration file for defining CLI options and project directories for Jest. This script dictates how tests are discovered and executed within the project's testing framework.

```luau
-- scripts/run-tests.luau

-- Placeholder for Luau script defining CLI options and Jest project directories.
-- This file configures the testing environment and test discovery.

local cliOptions = {
  -- Define CLI options here
}

local jestProjectDirs = {
  -- Specify directories containing tests here
}

print("Configuring test runner...")
-- Logic to use cliOptions and jestProjectDirs would go here.
print("Test runner configured.")
```

--------------------------------

### Accessing RunService Phases

Source: https://github.com/yetanotherclown/planck/blob/main/docs/getting_started/phases.md

Shows how to access the Phases provided by the PlanckRunService plugin, which map directly to RunService events. Note that 'Heartbeat' is mapped to the 'Update' phase.

```lua
local PlanckRunService = require("@packages/PlanckRunService")

local Phases = PlanckRunService.Phases

local PreRender = Phases.PreRender
local PreAnimation = Phases.PreAnimation
local PreSimulation = Phases.PreSimulation
local PostSimulation = Phases.PostSimulation
local Update = Phases.Update
```

--------------------------------

### Create and Use Phases

Source: https://github.com/yetanotherclown/planck/blob/main/README.md

Explains how to create custom Phases within Planck to segment the frame's execution. Systems can then be associated with specific phases, allowing for controlled execution order.

```luau
local Planck = require("@packages/Planck")
local Scheduler = Planck.Scheduler
local Phase = Planck.Phase

-- ... (Scheduler initialization)

local systemA = require("@shared/systems/systemA")

local myPhase = Phase.new("myPhase") -- Create a new phase named 'myPhase'

scheduler
    :insert(myPhase) -- Add the phase to the scheduler's known phases
    :addSystem(systemA, myPhase) -- Add systemA to run within myPhase
```

--------------------------------

### Generic Move Models System

Source: https://github.com/yetanotherclown/planck/blob/main/docs/design/systems.md

This Lua code demonstrates a refactored, generic system for moving any game entity that has Position and Velocity components, promoting reusability.

```lua
local world = require("@shared/world")
local scheduler = require("@shared/scheduler")

local Enemy = world:component()
local Position = world:component()
local Velocity = world:component()

local function moveModels() -- Move models every frame
    for entity, position, velocity in
        world:query(Position, Velocity):iter()
    do
        local deltaTime = scheduler:getDeltaTime()

        world:set(entity, Position, position * deltaTime * velocity)
    end
end
```

--------------------------------

### Run Tests with run-in-roblox

Source: https://github.com/yetanotherclown/planck/blob/main/CONTRIBUTING.md

Execute the test suite from the command line using the provided shell script. This script leverages run-in-roblox to automate test execution within Roblox Studio.

```bash
#!/bin/bash

# This script is a placeholder for the actual test execution logic.
# It assumes run-in-roblox is set up and configured.

echo "Running tests using scripts/test.sh..."
# Example command (actual command may vary):
# ./scripts/test.sh

echo "Tests executed."
```

--------------------------------

### Add System to Scheduler (Lua)

Source: https://github.com/yetanotherclown/planck/blob/main/docs/plugins/matter_hooks.md

This Luau code shows how to add a previously defined system (e.g., `systemA`) to the scheduler. This is typically done during the application's startup phase.

```lua
local scheduler = require("@shared/scheduler")
local systemA = require("@shared/systems/systemA")

return function()
    scheduler
        :addSystem(systemA)
end
```

--------------------------------

### Access Additional Update Phases (Lua)

Source: https://github.com/yetanotherclown/planck/blob/main/docs/plugins/runservice.md

This Lua snippet demonstrates accessing the multiple Phases available for the RunService.Heartbeat event. These phases, including First, PreUpdate, Update, PostUpdate, and Last, allow for granular control over the order of game logic execution.

```lua
```lua
local PlanckRunService = require("@packages/PlanckRunService")

local Phases = PlanckRunService.Phases

local First = Phases.First
local PreUpdate = Phases.PreUpdate
local Update = Phases.Update
local PostUpdate = Phases.PostUpdate
local Last = Phases.Last
```
```

--------------------------------

### Access RunService Pipelines (Lua)

Source: https://github.com/yetanotherclown/planck/blob/main/docs/plugins/runservice.md

This Lua snippet illustrates how to access the predefined RunService Pipelines provided by the PlanckRunService plugin. These pipelines correspond to specific RunService events like PreRender, PreAnimation, and Heartbeat.

```lua
```lua
local PlanckRunService = require("@packages/PlanckRunService")

local Pipelines = PlanckRunService.Pipelines

local PreRender = Pipelines.PreRender
local PreAnimation = Pipelines.PreAnimation
local PreSimulation = Pipelines.PreSimulation
local PostSimulation = Pipelines.PostSimulation
local Heartbeat = Pipelines.Heartbeat
```
```

--------------------------------

### Glossary Navigation Data Structures

Source: https://github.com/yetanotherclown/planck/blob/main/docs/intro.mdx

JavaScript arrays containing structured data for the glossary navigation. Each object represents a section with a title, an ID for linking, and a description that includes a list of related topics or API references.

```javascript
export const ROW_ONE = [
    {
        title: "Getting Started",
        id: "getting-started",
        description: <>
            <ul>
                <li><Link to="./getting_started/introduction">Introduction</Link></li>
                <li><Link to="./getting_started/scheduler">The Scheduler</Link></li>
                <li><Link to="./getting_started/systems">Systems</Link></li>
                <li><Link to="./getting_started/phases">Phases</Link></li>
                <li><Link to="./getting_started/order">Order of Execution</Link></li>
            </ul>
        </>,
    },
    {
        title: "Designing with Planck",
        id: "designing-with-planck",
        description: <>
            <ul>
                <li><Link to="./design">Introduction</Link></li>
                <li><Link to="./design/systems">Systems</Link></li>
                <li><Link to="./design/phases-and-pipelines">Phases & Pipelines</Link></li>
                <li><Link to="./design/conditions">Conditions</Link></li>
            </ul>
        </>,
    },
];

export const ROW_TWO = [
    {
        title: "Setup Guides",
        id: "setup-guides",
        description: <>
            <ul>
                <li><Link to="./setup_guides/matter">Matter</Link></li>
                <li><Link to="./setup_guides/jecs">Jecs</Link></li>
            </ul>
        </>,
    },
    {
        title: "Plugins",
        id: "plugins",
        description: <>
            <ul>
                <li><Link to="./plugins">Plugins</Link></li>
                <li><Link to="./plugins/jabby">Jabby</Link></li>
                <li><Link to="./plugins/matter_hooks">Matter Hooks</Link></li>
                <li><Link to="./plugins/matter_debugger">Matter Debugger</Link></li>
                <li><Link to="./plugins/runservice">RunService Phases</Link></li>
            </ul>
        </>,
    },
    {
        title: "API",
        id: "api",
        description: <>
            <ul>
                <li><Link to="../api/Scheduler">Scheduler</Link></li>
                <li><Link to="../api/Pipeline">Pipeline</Link></li>
                <li><Link to="../api/Phase">Phase</Link></li>
            </ul>
        </>,
    },
];
```