How to make changes to Chat scripts (without forking)

I want to change some stuff in the chat scripts, WITHOUT forking. I can change some stuff, for example

Chat:RegisterChatCallback(Enum.ChatCallbackType.OnClientFormattingMessage, function()
	return {
		ClassicChatEnabled = true,
		BubbleChatEnabled = true,

		DefaultFont = Enum.Font.Gotham,
		ChatBarFont = Enum.Font.Gotham,

However, I want to enable RichText on the chat. I have figured out to do it via forking. Inside of the Util module, there’s this function, and by simply setting BaseMessage.RichText, it enables RichText. However, I don’t want to rely on forked scripts, as whenever I have forked in the past, Roblox chat gets an update without informing anyone, and I have to spent several hours tryna get my changes in the forked chat to match with the new chat.

function methods:CreateBaseMessage(message, font, textSize, chatColor)
	local BaseFrame = self:GetFromObjectPool("Frame")
	BaseFrame.Selectable = false
	BaseFrame.Size =, 0, 0, 18)
	BaseFrame.Visible = true
	BaseFrame.BackgroundTransparency = 1

	local messageBorder = 8

	local BaseMessage = self:GetFromObjectPool("TextLabel")
	BaseMessage.Selectable = false
	BaseMessage.Size =, -(messageBorder + 6), 1, 0)
	BaseMessage.Position =, messageBorder, 0, 0)
	BaseMessage.BackgroundTransparency = 1
	BaseMessage.Font = font
	BaseMessage.TextSize = textSize
	BaseMessage.TextXAlignment = Enum.TextXAlignment.Left
	BaseMessage.TextYAlignment = Enum.TextYAlignment.Top
	BaseMessage.TextTransparency = 0
	BaseMessage.TextStrokeTransparency = 0.75
	BaseMessage.TextColor3 = chatColor
	BaseMessage.TextWrapped = true
	BaseMessage.ClipsDescendants = true
	BaseMessage.Text = message
	BaseMessage.Visible = true
	BaseMessage.Parent = BaseFrame
	BaseMessage.RichText = true

	return BaseFrame, BaseMessage

So is there a way I can do this, using something like I have above to make changes to the chat?