Hook → Signal Catalog

Signal Catalog

Every key Hook recognises as a Roblox built-in signal. Any key not in this list is treated as a custom event — use Hook.Fire to dispatch it.

Client-only signals warn and no-op if subscribed from a server script. Per-player signals pass (player, ...) — Hook wires them automatically for every current and future player.

Players

Key	Args	Context
`"PlayerAdded"`	`player: Player`	Both
`"PlayerRemoving"`	`player: Player`	Both
`"PlayerMembershipChanged"`	`player: Player`	Both
`"CharacterAdded"`	`player: Player, character: Model`	Both · per-player
`"CharacterRemoving"`	`player: Player, character: Model`	Both · per-player
`"CharacterAppearanceLoaded"`	`player: Player, character: Model`	Both · per-player

RunService

Key	Args	Context
`"Heartbeat"`	`dt: number`	Both
`"Stepped"`	`time: number, dt: number`	Both
`"PostSimulation"`	`dt: number`	Both
`"PreAnimation"`	`dt: number`	Both
`"PostAnimation"`	`dt: number`	Both
`"RenderStepped"`	`dt: number`	Client only
`"PreRender"`	`dt: number`	Client only

UserInputService

Key	Args	Context
`"InputBegan"`	`input: InputObject, processed: boolean`	Client only
`"InputChanged"`	`input: InputObject, processed: boolean`	Client only
`"InputEnded"`	`input: InputObject, processed: boolean`	Client only
`"JumpRequest"`	—	Client only
`"GamepadConnected"`	`gamepad: Enum.UserInputType`	Client only
`"GamepadDisconnected"`	`gamepad: Enum.UserInputType`	Client only
`"WindowFocused"`	—	Client only
`"WindowFocusReleased"`	—	Client only
`"TouchStarted"`	`touch: InputObject, processed: boolean`	Client only
`"TouchMoved"`	`touch: InputObject, processed: boolean`	Client only
`"TouchEnded"`	`touch: InputObject, processed: boolean`	Client only
`"TouchTap"`	`positions: {Vector2}, processed: boolean`	Client only
`"TouchLongPress"`	`positions: {Vector2}, state: Enum.UserInputState, processed: boolean`	Client only
`"TouchSwipe"`	`direction: Enum.SwipeDirection, numberOfTouches: number, processed: boolean`	Client only
`"TouchPinch"`	`positions: {Vector2}, scale: number, velocity: number, state: Enum.UserInputState, processed: boolean`	Client only
`"TouchRotate"`	`positions: {Vector2}, rotation: number, velocity: number, state: Enum.UserInputState, processed: boolean`	Client only
`"DeviceAccelerationChanged"`	`acceleration: InputObject`	Client only
`"DeviceGravityChanged"`	`gravity: InputObject`	Client only
`"DeviceRotationChanged"`	`rotation: InputObject, cframe: CFrame`	Client only
`"PointerAction"`	`wheel: number, pan: Vector2, pinch: number, processed: boolean`	Client only

MarketplaceService

Key	Args	Context
`"PromptPurchaseFinished"`	`player: Player, assetId: number, purchased: boolean`	Both
`"PromptGamePassPurchaseFinished"`	`player: Player, gamePassId: number, purchased: boolean`	Both
`"PromptBundlePurchaseFinished"`	`player: Player, bundleId: number, purchased: boolean`	Both
`"PromptSubscriptionPurchaseFinished"`	`player: Player, subscriptionId: string, purchased: boolean`	Both

TeleportService

Key	Args	Context
`"TeleportInitFailed"`	`player: Player, teleportResult: Enum.TeleportResult, errorMessage: string`	Both
`"LocalPlayerArrivedFromTeleport"`	`loadingGui: ScreenGui, dataTable: any`	Client only

SocialService

Key	Args	Context
`"GameInvitePromptClosed"`	`player: Player, recipientIds: {number}`	Both
`"PromptInviteRequested"`	`player: Player`	Both

GuiService

Key	Args	Context
`"MenuOpened"`	—	Client only
`"MenuClosed"`	—	Client only
`"KeyboardVisibilityChanged"`	`visible: boolean`	Client only

TextChatService

Key	Args	Context
`"MessageReceived"`	`message: TextChatMessage`	Both
`"SendingMessage"`	`message: TextChatMessage`	Both

VoiceChatService

Key	Args	Context
`"ParticipantsStateChanged"`	`participants: {any}, oldState: any, newState: any`	Both
`"PlayerMicActivitySignalChange"`	`player: Player, isActive: boolean`	Both

CollectionService — parameterised

Pass the tag name after a colon. Each unique tag gets its own priority queue.

Key pattern	Args
`"TagAdded:tagName"`	`instance: Instance`
`"TagRemoved:tagName"`	`instance: Instance`

Hook("TagAdded:Enemy",   "normal", function(instance) SetupEnemy(instance) end)
Hook("TagRemoved:Enemy", "normal", function(instance) TeardownEnemy(instance) end)

Game / Lighting

Key	Args	Context
`"Close"`	—	Both
`"DescendantAdded"`	`descendant: Instance`	Both
`"DescendantRemoving"`	`descendant: Instance`	Both
`"LightingChanged"`	`skyboxChanged: boolean`	Both