Infinite Jump Hold version

-- Eclipse Hub-style Infinite Jump + Sprint (with forward velocity carry)
local Players = game:GetService("Players")
local UIS = game:GetService("UserInputService")
local player = Players.LocalPlayer

-- Settings
_G.JumpHeight = 50
_G.NormalSpeed = 16
_G.BoostSpeed = 40
_G.InfJumpEnabled = true

-- States
local holdingJump = false
local holdingShift = false

-- Infinite Jump with Momentum
local function doInfJump()
	while holdingJump and _G.InfJumpEnabled do
		local char = player.Character
		if char then
			local humanoid = char:FindFirstChildOfClass("Humanoid")
			local root = char:FindFirstChild("HumanoidRootPart")
			if humanoid and root then
				local state = humanoid:GetState()
				if state == Enum.HumanoidStateType.Jumping or state == Enum.HumanoidStateType.Freefall then
					local currentVel = root.Velocity
					root.Velocity = Vector3.new(currentVel.X, _G.JumpHeight, currentVel.Z)
				end
			end
		end
		task.wait()
	end
end

-- Sprint logic (apply always, even midair)
local function updateSpeed()
	local char = player.Character
	if char then
		local humanoid = char:FindFirstChildOfClass("Humanoid")
		if humanoid then
			humanoid.WalkSpeed = holdingShift and _G.BoostSpeed or _G.NormalSpeed
		end
	end
end

-- Input listeners
UIS.InputBegan:Connect(function(input, gp)
	if gp then return end
	if input.KeyCode == Enum.KeyCode.Space then
		holdingJump = true
		coroutine.wrap(doInfJump)()
	elseif input.KeyCode == Enum.KeyCode.LeftShift then
		holdingShift = true
		updateSpeed()
	end
end)

UIS.InputEnded:Connect(function(input)
	if input.KeyCode == Enum.KeyCode.Space then
		holdingJump = false
	elseif input.KeyCode == Enum.KeyCode.LeftShift then
		holdingShift = false
		updateSpeed()
	end
end)

-- On reset
local function onChar(char)
	task.wait(1)
	local hum = char:WaitForChild("Humanoid")
	hum.WalkSpeed = _G.NormalSpeed
end

player.CharacterAdded:Connect(onChar)
if player.Character then onChar(player.Character) end