diff --git a/C_ActionBar.lua b/C_ActionBar.lua
new file mode 100644
index 0000000..503e1eb
--- /dev/null
+++ b/C_ActionBar.lua
@@ -0,0 +1,161 @@
+---@meta
+---
+--- C_ActionBar is a namespace for functions related to the action bar system.
+---
+--- @class C_ActionBar
+C_ActionBar = {
+	--- @param actionID number
+	--- @return boolean
+	--- Returns whether the action can be used.
+	CanUseAction = function(actionID) end,
+
+	--- @param actionID number
+	--- @return boolean
+	--- Returns whether the action is currently being used.
+	IsCurrentAction = function(actionID) end,
+
+	--- @param actionID number
+	--- @return boolean
+	--- Returns whether the action is enabled.
+	IsEnabled = function(actionID) end,
+
+	--- @param actionID number
+	--- @return boolean
+	--- Returns whether the action is equipped.
+	IsEquippedAction = function(actionID) end,
+
+	--- @param actionID number
+	--- @return boolean
+	--- Returns whether the action is harmful.
+	IsHarmfulAction = function(actionID) end,
+
+	--- @param actionID number
+	--- @return boolean
+	--- Returns whether the action is helpful.
+	IsHelpfulAction = function(actionID) end,
+
+	--- @param actionID number
+	--- @return boolean
+	--- Returns whether the action is in range.
+	IsInRange = function(actionID) end,
+
+	--- @param actionID number
+	--- @return boolean
+	--- Returns whether the action is on cooldown.
+	IsOnCooldown = function(actionID) end,
+
+	--- @param actionID number
+	--- @return boolean
+	--- Returns whether the action is usable.
+	IsUsableAction = function(actionID) end,
+
+	--- @param actionID number
+	--- @return nil
+	--- Uses the specified action.
+	UseAction = function(actionID) end,
+
+	--- @param actionID number
+	--- @return number
+	--- Returns the cooldown information for the action.
+	GetActionCooldown = function(actionID) end,
+
+	--- @param actionID number
+	--- @return string
+	--- Returns the texture for the action.
+	GetActionTexture = function(actionID) end,
+
+	--- @param actionID number
+	--- @return string
+	--- Returns the tooltip text for the action.
+	GetActionText = function(actionID) end,
+
+	--- @param actionID number
+	--- @return number
+	--- Returns the type of the action.
+	GetActionType = function(actionID) end,
+
+	--- @param actionID number
+	--- @return number
+	--- Returns the count of items for the action.
+	GetActionCount = function(actionID) end,
+
+	--- @param actionID number
+	--- @return number
+	--- Returns the charges for the action.
+	GetActionCharges = function(actionID) end,
+
+	--- @param actionID number
+	--- @return number
+	--- Returns the maximum charges for the action.
+	GetActionMaxCharges = function(actionID) end,
+
+	--- @param actionID number
+	--- @return number
+	--- Returns the start time of the action cooldown.
+	GetActionStartTime = function(actionID) end,
+
+	--- @param actionID number
+	--- @return number
+	--- Returns the duration of the action cooldown.
+	GetActionDuration = function(actionID) end,
+
+	--- @param actionID number
+	--- @return boolean
+	--- Returns whether the action is currently active.
+	IsActionActive = function(actionID) end,
+
+	--- @param actionID number
+	--- @return boolean
+	--- Returns whether the action is currently being cast.
+	IsActionBeingCast = function(actionID) end,
+
+	--- @param actionID number
+	--- @return boolean
+	--- Returns whether the action is currently being channeled.
+	IsActionBeingChanneled = function(actionID) end,
+
+	--- @param actionID number
+	--- @return boolean
+	--- Returns whether the action is currently being used.
+	IsActionBeingUsed = function(actionID) end,
+
+	--- @param actionID number
+	--- @return boolean
+	--- Returns whether the action is currently being queued.
+	IsActionQueued = function(actionID) end,
+
+	--- @param actionID number
+	--- @return boolean
+	--- Returns whether the action is currently being queued for auto-cast.
+	IsActionQueuedForAutoCast = function(actionID) end,
+
+	--- @param actionID number
+	--- @return boolean
+	--- Returns whether the action is currently being queued for auto-cast on all targets.
+	IsActionQueuedForAutoCastOnAllTargets = function(actionID) end,
+
+	--- @param actionID number
+	--- @return boolean
+	--- Returns whether the action is currently being queued for auto-cast on the current target.
+	IsActionQueuedForAutoCastOnCurrentTarget = function(actionID) end,
+
+	--- @param actionID number
+	--- @return boolean
+	--- Returns whether the action is currently being queued for auto-cast on the focus target.
+	IsActionQueuedForAutoCastOnFocusTarget = function(actionID) end,
+
+	--- @param actionID number
+	--- @return boolean
+	--- Returns whether the action is currently being queued for auto-cast on the mouseover target.
+	IsActionQueuedForAutoCastOnMouseoverTarget = function(actionID) end,
+
+	--- @param actionID number
+	--- @return boolean
+	--- Returns whether the action is currently being queued for auto-cast on the player.
+	IsActionQueuedForAutoCastOnPlayer = function(actionID) end,
+
+	--- @param actionID number
+	--- @return boolean
+	--- Returns whether the action is currently being queued for auto-cast on the target.
+	IsActionQueuedForAutoCastOnTarget = function(actionID) end,
+}