saveinstance

--!native
--!optimize 2
--!divine-intellect
-- https://discord.gg/wx4ThpAsmw

local konstantdecompiler = loadstring(game:HttpGet('https://raw.githubusercontent.com/verysigmapro/UniversalSynSaveInstance-With-Save-Terrain/refs/heads/main/konstantdecompiler.lua'))()

local game = game
local pcall = pcall
local workspace = workspace
local setmetatable = setmetatable
local bit32 = bit32
local buffer = buffer
local Instance = Instance
local assert = assert
local table = table
local string = string

local function string_find(s, pattern)
	return string.find(s, pattern, nil, true)
end

local function ArrayToDict(t, hydridMode, valueOverride, typeStrict)
	local tmp = {}

	if hydridMode then
		for any1, any2 in t do
			if type(any1) == "number" then
				tmp[any2] = valueOverride or true
			elseif type(any2) == "table" then
				tmp[any1] = ArrayToDict(any2, hydridMode) -- any1 is Class, any2 is Name
			else
				tmp[any1] = any2
			end
		end
	else
		for _, key in t do
			if not typeStrict or typeStrict and type(key) == typeStrict then
				tmp[key] = true
			end
		end
	end

	return tmp
end

local global_container
do
	local filename = "UniversalMethodFinder"

	local finder
	finder, global_container = loadstring(
		game:HttpGet("https://raw.githubusercontent.com/luau/SomeHub/main/" .. filename .. ".luau", true),
		filename
	)()

	finder({
		-- readbinarystring = 'string.find(...,"bin",nil,true)', -- ! Could match some unwanted stuff (getbinaryindex)
		-- request = 'string.find(...,"request",nil,true) and not string.find(...,"internal",nil,true)',
		base64encode = 'local a={...}local b=a[1]local function c(a,b)return string.find(a,b,nil,true)end;return c(b,"encode")and(c(b,"base64")or c(string.lower(tostring(a[2])),"base64"))',
		-- cloneref = 'string.find(...,"clone",nil,true) and string.find(...,"ref",nil,true)',
		-- decompile = '(string.find(...,"decomp",nil,true) and string.sub(...,#...) ~= "s")',
		gethiddenproperty = 'string.find(...,"get",nil,true) and string.find(...,"h",nil,true) and string.find(...,"prop",nil,true) and string.sub(...,#...) ~= "s"',
		gethui = 'string.find(...,"get",nil,true) and string.find(...,"h",nil,true) and string.find(...,"ui",nil,true)',
		-- getcon = 'string.find(...,"get",nil,true) and (string.find(...,"conn",nil,true) or string.find(...,"sig",nil,true)) and string.sub(...,#(...))=="s"',
		getnilinstances = 'string.find(...,"nil",nil,true) and string.find(...,"get",nil,true) and string.sub(...,#...) == "s"', -- ! Could match some unwanted stuff
		getscriptbytecode = 'string.find(...,"get",nil,true) and string.find(...,"bytecode",nil,true)', --  or string.find(...,"dump",nil,true) and string.find(...,"string",nil,true) due to Fluxus (dumpstring returns a function)
		-- hash = 'local a={...}local b=a[1]local function c(a,b)return string.find(a,b,nil,true)end;return c(b,"hash")and c(string.lower(tostring(a[2])),"crypt")',
		protectgui = 'string.find(...,"protect",nil,true) and string.find(...,"ui",nil,true) and not string.find(...,"un",nil,true)',
		setthreadidentity = 'string.find(...,"identity",nil,true) and string.find(...,"set",nil,true)',
	}, true, 10)
end

local identify_executor = identifyexecutor or getexecutorname or whatexecutor

local EXECUTOR_NAME = identify_executor and identify_executor() or ""

-- local cloneref = global_container.cloneref
local gethiddenproperty = global_container.gethiddenproperty

-- These should be universal enough
local appendfile = appendfile
local isfile = isfile
local readfile = readfile
local writefile = writefile

local getscriptbytecode = global_container.getscriptbytecode -- * A lot of assumptions are made based on whether this function is defined or not. So in certain edge cases, like if the executor defines "decompile" or "getscripthash" function yet doesn't define this function there might be loss of functionality of the saveinstance. Although that would be very rare and weird
local base64encode = global_container.base64encode

local service = setmetatable({}, {
	__index = function(self, serviceName)
		local o, s = pcall(Instance.new, serviceName)
		local Service = o and s
			or game:GetService(serviceName)
			or settings():GetService(serviceName)
			or UserSettings():GetService(serviceName)

		-- if cloneref then
		-- 	Service = cloneref(Service)
		-- end
		if Service then
			self[serviceName] = Service
		end
		return Service
	end,
})

local gethiddenproperty_fallback
do -- * Load Region of Déjà Vu
	local UGCValidationService -- = service.UGCValidationService

	gethiddenproperty_fallback = function(instance, propertyName)
		if not UGCValidationService then
			UGCValidationService = service.UGCValidationService
		end
		return UGCValidationService:GetPropertyValue(instance, propertyName) -- TODO Sadly there's no way to tell whether value is actually nil or the function just couldn't read it (always returns nil for "Class" category properties)
		-- TODO `category ~= "Class"` causes WeldConstraint Part1Internal to be read as nil and not get unfiltered. Currently, there are no properties of category "Class" that match the following: NotScriptable, can be read with gethiddenproperty_fallback accurately (it always outputs nil for "Class" category, making that check useless anyway) & don't have a NotScriptableFix.
	end
	if gethiddenproperty then
		local o, r = pcall(gethiddenproperty, workspace, "StreamOutBehavior")
		if not o or r ~= nil and typeof(r) ~= "EnumItem" then -- * Tests if gethiddenproperty is broken
			gethiddenproperty = nil
		else
			o, r = pcall(gethiddenproperty, Instance.new("AnimationRigData", Instance.new("Folder")), "parent") -- * Tests how it reacts to property overlap (shadowing) due to AnimationRigData.parent; expected BinaryString

			if o and r ~= nil and type(r) ~= "string" then
				gethiddenproperty = nil
			end
		end
	end
	local function benchmark(funcs, ...)
		local ranking = table.create(2)
		for i, f in funcs do
			local start = os.clock()
			for _ = 1, 50 do
				f(...)
			end
			ranking[i] = { t = os.clock() - start, f = f }
		end
		table.sort(ranking, function(a, b)
			return a.t < b.t
		end)
		return ranking[1].f
	end

	local test_str = string.rep("\1\0\0\0\1\2\3\4\5\6\7", 50)

	do
		if not bit32.byteswap or not pcall(bit32.byteswap, 1) then -- Because Fluxus is missing byteswap
			bit32 = table.clone(bit32)

			local function tobit(num)
				num %= (bit32.bxor(num, 32))
				if 0x80000000 < num then
					num -= bit32.bxor(num, 32)
				end
				return num
			end

			bit32.byteswap = function(num)
				local BYTE_SIZE = 8
				local MAX_BYTE_VALUE = 255

				num %= bit32.bxor(2, 32)

				local a = bit32.band(num, MAX_BYTE_VALUE)
				num = bit32.rshift(num, BYTE_SIZE)

				local b = bit32.band(num, MAX_BYTE_VALUE)
				num = bit32.rshift(num, BYTE_SIZE)

				local c = bit32.band(num, MAX_BYTE_VALUE)
				num = bit32.rshift(num, BYTE_SIZE)

				local d = bit32.band(num, MAX_BYTE_VALUE)
				num = tobit(bit32.lshift(bit32.lshift(bit32.lshift(a, BYTE_SIZE) + b, BYTE_SIZE) + c, BYTE_SIZE) + d)
				return num
			end

			table.freeze(bit32)
		end

		-- Credits @daily3014 & @XoifaiI
		local rbxcrypt_base64encode
		pcall(function()
			local b64_enc_buf = loadstring(
				game:HttpGet(
					"https://raw.githubusercontent.com/verysigmapro/UniversalSynSaveInstance-With-Save-Terrain/refs/heads/main/daily3014_Base64.luau",
					true
				),
				"Base64"
			)().Encode
			rbxcrypt_base64encode = function(raw)
				return buffer.tostring(b64_enc_buf(buffer.fromstring(raw)))
			end
		end)

		local EncodingService = game:GetService("EncodingService")
		local EncodingService_base64encode = function(raw)
			return buffer.tostring(EncodingService:Base64Encode(buffer.fromstring(raw)))
		end

		-- * Tests if base64encode exists and works properly then benchmark it
		if base64encode and base64encode("\1\0\0\0\1") == "AQAAAAE=" then
			if rbxcrypt_base64encode then
				base64encode =
					benchmark({ base64encode, rbxcrypt_base64encode, EncodingService_base64encode }, test_str)
			end
		else
			base64encode = rbxcrypt_base64encode
		end

		assert(base64encode, "base64encode not found")
	end
end

local SharedStrings = {}
local SharedString_identifiers = setmetatable({
	identifier = 1e15, -- 1 quadrillion, up to 9.(9) quadrillion, in theory this shouldn't ever run out and be enough for all sharedstrings ever imaginable
	-- TODO: worst case, add fallback to str randomizer once numbers run out : )
}, {
	__index = function(self, str)
		local Identifier = base64encode(tostring(self.identifier)) -- tostring is only needed for built-in base64encode, Luau base64 implementations don't need it as buffers autoconvert
		self.identifier += 1

		self[str] = Identifier -- ? The value of the md5 attribute is a Base64-encoded key. <SharedString> type elements use this key to refer to the value of the string. The value is the text content, which is Base64-encoded. Historically, the key was the MD5 hash of the string value. However, this is not required; the key can be any value that will uniquely identify the shared string. Roblox currently uses BLAKE2b truncated to 16 bytes..
		return Identifier
	end,
})

local inherited_properties = {}
local default_instances = {}
local referents, ref_size = {}, 0 -- ? Roblox encodes all <Item> elements with a referent attribute. Each value is generated by starting with the prefix RBX, followed by a UUID version 4, with - characters removed, and all characters converted to uppercase.

local function GetRef(instance)
	local ref = referents[instance]
	if not ref then
		ref = ref_size
		referents[instance] = ref
		ref_size += 1
	end
	return ref
end

local function index(self, index_name)
	return self[index_name]
end

local version = version
if not version then
	version = function()
		return "UNKNOWN"
	end
end

local CLIENT_VERSION = tonumber(string.split(version(), ".")[2]) or 9e9 -- Velocity temp fix

local attr_Type_IDs = {
	string = 0x02,
	boolean = 0x03,
	int32 = 0x04,
	-- float = 0x05, -- float32
	number = 0x06, -- float64 (double)
	-- Array = 0x07,
	-- Dictionary = 0x08,
	UDim = 0x09,
	UDim2 = 0x0A,
	Ray = 0x0B,
	Faces = 0x0C,
	Axes = 0x0D,
	BrickColor = 0x0E,
	Color3 = 0x0F,
	Vector2 = 0x10,
	Vector3 = 0x11,
	Vector2int16 = 0x12,
	Vector3int16 = 0x13,
	CFrame = 0x14,
	EnumItem = 0x15,
	NumberSequence = 0x17,
	NumberSequenceKeypoint = 0x18,
	ColorSequence = 0x19,
	ColorSequenceKeypoint = 0x1A,
	NumberRange = 0x1B,
	Rect = 0x1C,
	PhysicalProperties = 0x1D,
	Region3 = 0x1F,
	Region3int16 = 0x20,
	Font = 0x21,
	SecurityCapabilities = 0x22,
	Path2DControlPoint = 0x23,
}
local CFrame_Rotation_IDs = {
	["\0\0\128\63\0\0\0\0\0\0\0\0\0\0\0\0\0\0\128\63\0\0\0\0\0\0\0\0\0\0\0\0\0\0\128\63"] = 0x02,
	["\0\0\128\63\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\128\191\0\0\0\0\0\0\128\63\0\0\0\0"] = 0x03,
	["\0\0\128\63\0\0\0\0\0\0\0\0\0\0\0\0\0\0\128\191\0\0\0\0\0\0\0\0\0\0\0\0\0\0\128\191"] = 0x05,
	["\0\0\128\63\0\0\0\0\0\0\0\128\0\0\0\0\0\0\0\0\0\0\128\63\0\0\0\0\0\0\128\191\0\0\0\0"] = 0x06,
	["\0\0\0\0\0\0\128\63\0\0\0\0\0\0\128\63\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\128\191"] = 0x07,
	["\0\0\0\0\0\0\0\0\0\0\128\63\0\0\128\63\0\0\0\0\0\0\0\0\0\0\0\0\0\0\128\63\0\0\0\0"] = 0x09,
	["\0\0\0\0\0\0\128\191\0\0\0\0\0\0\128\63\0\0\0\0\0\0\0\128\0\0\0\0\0\0\0\0\0\0\128\63"] = 0x0a,
	["\0\0\0\0\0\0\0\0\0\0\128\191\0\0\128\63\0\0\0\0\0\0\0\0\0\0\0\0\0\0\128\191\0\0\0\0"] = 0x0c,
	["\0\0\0\0\0\0\128\63\0\0\0\0\0\0\0\0\0\0\0\0\0\0\128\63\0\0\128\63\0\0\0\0\0\0\0\0"] = 0x0d,
	["\0\0\0\0\0\0\0\0\0\0\128\191\0\0\0\0\0\0\128\63\0\0\0\0\0\0\128\63\0\0\0\0\0\0\0\0"] = 0x0e,
	["\0\0\0\0\0\0\128\191\0\0\0\0\0\0\0\0\0\0\0\0\0\0\128\191\0\0\128\63\0\0\0\0\0\0\0\0"] = 0x10,
	["\0\0\0\0\0\0\0\0\0\0\128\63\0\0\0\0\0\0\128\191\0\0\0\0\0\0\128\63\0\0\0\0\0\0\0\128"] = 0x11,
	["\0\0\128\191\0\0\0\0\0\0\0\0\0\0\0\0\0\0\128\63\0\0\0\0\0\0\0\0\0\0\0\0\0\0\128\191"] = 0x14,
	["\0\0\128\191\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\128\63\0\0\0\0\0\0\128\63\0\0\0\128"] = 0x15,
	["\0\0\128\191\0\0\0\0\0\0\0\0\0\0\0\0\0\0\128\191\0\0\0\0\0\0\0\0\0\0\0\0\0\0\128\63"] = 0x17,
	["\0\0\128\191\0\0\0\0\0\0\0\128\0\0\0\0\0\0\0\0\0\0\128\191\0\0\0\0\0\0\128\191\0\0\0\128"] = 0x18,
	["\0\0\0\0\0\0\128\63\0\0\0\128\0\0\128\191\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\128\63"] = 0x19,
	["\0\0\0\0\0\0\0\0\0\0\128\191\0\0\128\191\0\0\0\0\0\0\0\0\0\0\0\0\0\0\128\63\0\0\0\0"] = 0x1b,
	["\0\0\0\0\0\0\128\191\0\0\0\128\0\0\128\191\0\0\0\0\0\0\0\128\0\0\0\0\0\0\0\0\0\0\128\191"] = 0x1c,
	["\0\0\0\0\0\0\0\0\0\0\128\63\0\0\128\191\0\0\0\0\0\0\0\0\0\0\0\0\0\0\128\191\0\0\0\0"] = 0x1e,
	["\0\0\0\0\0\0\128\63\0\0\0\0\0\0\0\0\0\0\0\0\0\0\128\191\0\0\128\191\0\0\0\0\0\0\0\0"] = 0x1f,
	["\0\0\0\0\0\0\0\0\0\0\128\63\0\0\0\0\0\0\128\63\0\0\0\128\0\0\128\191\0\0\0\0\0\0\0\0"] = 0x20,
	["\0\0\0\0\0\0\128\191\0\0\0\0\0\0\0\0\0\0\0\0\0\0\128\63\0\0\128\191\0\0\0\0\0\0\0\0"] = 0x22,
	["\0\0\0\0\0\0\0\0\0\0\128\191\0\0\0\0\0\0\128\191\0\0\0\128\0\0\128\191\0\0\0\0\0\0\0\128"] = 0x23,
}
local BASE_CAPABILITIES
pcall(function()
	BASE_CAPABILITIES = SecurityCapabilities.new()
end)
local CAPABILITY_BITS = {
	Plugin = 2 ^ 0, ----------------  0
	LocalUser = 2 ^ 1, -------------  1
	WritePlayer = 2 ^ 2, -----------  2
	RobloxScript = 2 ^ 3, ----------  3
	RobloxEngine = 2 ^ 4, ----------  4
	NotAccessible = 2 ^ 5, ---------  5
	RunClientScript = 2 ^ 8, -------  8
	RunServerScript = 2 ^ 9, -------  9
	Unknown = 2 ^ 10, --------------  10 (0xa)
	AccessOutsideWrite = 2 ^ 11, ---  11 (0xb)
	Unassigned = 2 ^ 15, -----------  15 (0xf)
	AssetRequire = 2 ^ 16, ---------  16 (0x10)
	LoadString = 2 ^ 17, -----------  17 (0x11)
	ScriptGlobals = 2 ^ 18, --------  18 (0x12)
	CreateInstances = 2 ^ 19, ------  19 (0x13)
	Basic = 2 ^ 20, ----------------  20 (0x14)
	Audio = 2 ^ 21, ----------------  21 (0x15)
	DataStore = 2 ^ 22, ------------  22 (0x16)
	Network = 2 ^ 23, --------------  23 (0x17)
	Physics = 2 ^ 24, --------------  24 (0x18)
	UI = 2 ^ 25, -------------------  25 (0x19)
	CSG = 2 ^ 26, ------------------  26 (0x1a)
	Chat = 2 ^ 27, -----------------  27 (0x1b)
	Animation = 2 ^ 28, ------------  28 (0x1c)
	Avatar = 2 ^ 29, ---------------  29 (0x1d)
	Input = 2 ^ 30, ----------------  30 (0x1e)
	Environment = 2 ^ 31, ----------  31 (0x1f)
	RemoteEvent = 2 ^ 32, ----------  32 (0x20)
	LegacySound = 2 ^ 33, ----------  33 (0x21)
	Players = 2 ^ 34, --------------  34 (0x22)
	CapabilityControl = 2 ^ 35, ----  35 (0x23)
	RemoteCommand = 2 ^ 59, --------  59 (0x3b)
	InternalTest = 2 ^ 60, ---------  60 (0x3c), Related to TestingGameScript
	PluginOrOpenCloud = 2 ^ 61, ----  61 (0x3d)
	Assistant = 2 ^ 62, ------------  62 (0x3e)
	-- Restricted = 2 ^ 63, --------  for negative (highest bit for i64)
}

local function __COUNT_CAPABILITY_BITS(raw)
	-- TODO tostring & string.split aren't ideal but this is the only way until the feature is out of the experimental phase (SecurityCapabilities.Contains exists but the Enums that it accepts lacks some hidden bits) - NotAccessible, Unknown, Restricted
	-- ! Seems like both tostring & .Contains ignore high / internal bits (anything above CapabilityControl): RemoteCommand, InternalTest, PluginOrOpenCloud, Assistant. They're present when created & saved by Studio but can't be read through current means

	local result = 0
	for _, flag in string.split(tostring(raw), " | ") do
		local bit = CAPABILITY_BITS[flag]
		if bit then
			result += bit
		end
	end
	return result
end

local function __COUNT_BITS(...) -- * Credits to Friend (you know yourself)
	local Value = 0

	for i, bit in { ... } do
		if bit then
			Value += 2 ^ (i - 1)
		end
	end

	return Value
end

local Binary_Descriptors
Binary_Descriptors = {
	__PACK_MULTIPLE = function(descriptor, value1, value2, value3)
		local buf1, size1 = descriptor(value1)
		local buf2, size2 = descriptor(value2)

		local len = size1 + size2
		local buf3, size3

		if value3 ~= nil then
			buf3, size3 = descriptor(value3)
			len += size3
		end

		local b = buffer.create(len)

		buffer.copy(b, 0, buf1)
		buffer.copy(b, size1, buf2)

		if value3 ~= nil then
			buffer.copy(b, size1 + size2, buf3)
		end

		return b, len
	end,
	__construct_Sequence = function(keypoint_handler, keypointSize)
		return function(raw)
			local Keypoints = raw.Keypoints
			local Keypoints_n = #Keypoints

			local len = 4 + keypointSize * Keypoints_n
			local b = buffer.create(len)

			buffer.writeu32(b, 0, Keypoints_n)

			local offset = 4
			for _, keypoint in Keypoints do
				keypoint_handler(keypoint, b, offset)
				offset += keypointSize
			end

			return b, len
		end
	end,
	__writei64 = function(b, offset, raw)
		local low = bit32.band(raw, 0xFFFFFFFF)
		local high = (raw - low) / 0x100000000

		buffer.writei32(b, offset, low)
		buffer.writei32(b, offset + 4, high)
	end,
	__PACK_F32 = nil,
	__PACK_I16 = nil,
	__construct__PACKER = function(float)
		local writeFunc = float and buffer.writef32 or buffer.writei16
		local elementSize = float and 4 or 2

		-- local zbuf, nozbuf = buffer.create(elementSize * 3), buffer.create(elementSize * 2)

		return function(X, Y, Z)
			local len = Z and (elementSize * 3) or (elementSize * 2)
			local b = buffer.create(len)

			writeFunc(b, 0, X)
			writeFunc(b, elementSize, Y)
			if Z then
				writeFunc(b, elementSize * 2, Z)
			end

			return b, len
		end
	end,
	--------------------------------------------------------------
	--------------------------------------------------------------
	--------------------------------------------------------------
	["string"] = function(raw)
		local raw_len = #raw
		local len = 4 + raw_len

		local b = buffer.create(len)

		buffer.writeu32(b, 0, raw_len)
		buffer.writestring(b, 4, raw)

		return b, len
	end,
	["boolean"] = function(raw)
		local b = buffer.create(1)

		buffer.writeu8(b, 0, raw and 1 or 0)

		return b, 1
	end,
	["number"] = function(raw) -- double
		local b = buffer.create(8)

		buffer.writef64(b, 0, raw)

		return b, 8
	end,
	["UDim"] = function(raw)
		local b = buffer.create(8)

		buffer.writef32(b, 0, raw.Scale)
		buffer.writei32(b, 4, raw.Offset)

		return b, 8
	end,
	["UDim2"] = function(raw)
		return Binary_Descriptors.__PACK_MULTIPLE(Binary_Descriptors["UDim"], raw.X, raw.Y)
	end,
	["Ray"] = function(raw)
		return Binary_Descriptors.__PACK_MULTIPLE(Binary_Descriptors["Vector3"], raw.Origin, raw.Direction)
	end,
	["Faces"] = function(raw)
		local b = buffer.create(4)

		buffer.writeu32(b, 0, __COUNT_BITS(raw.Right, raw.Top, raw.Back, raw.Left, raw.Bottom, raw.Front))

		return b, 4
	end,
	["Axes"] = function(raw)
		local b = buffer.create(4)

		buffer.writeu32(b, 0, __COUNT_BITS(raw.X, raw.Y, raw.Z))

		return b, 4
	end,
	["BrickColor"] = function(raw)
		local b = buffer.create(4)

		buffer.writeu32(b, 0, raw.Number)

		return b, 4
	end,
	["Color3"] = function(raw)
		return Binary_Descriptors.__PACK_F32(raw.R, raw.G, raw.B)
	end,
	["Vector2"] = function(raw)
		return Binary_Descriptors.__PACK_F32(raw.X, raw.Y)
	end,
	["Vector3"] = function(raw)
		return Binary_Descriptors.__PACK_F32(raw.X, raw.Y, raw.Z)
	end,
	["Vector2int16"] = function(raw)
		return Binary_Descriptors.__PACK_I16(raw.X, raw.Y)
	end,
	["Vector3int16"] = function(raw)
		return Binary_Descriptors.__PACK_I16(raw.X, raw.Y, raw.Z)
	end,
	["CFrame"] = function(raw)
		local X, Y, Z, R00, R01, R02, R10, R11, R12, R20, R21, R22 = raw:GetComponents()
		local rotation_ID
		do
			local b = buffer.create(36)

			buffer.writef32(b, 0, R00)
			buffer.writef32(b, 4, R01)
			buffer.writef32(b, 8, R02)
			buffer.writef32(b, 12, R10)
			buffer.writef32(b, 16, R11)
			buffer.writef32(b, 20, R12)
			buffer.writef32(b, 24, R20)
			buffer.writef32(b, 28, R21)
			buffer.writef32(b, 32, R22)

			rotation_ID = CFrame_Rotation_IDs[buffer.tostring(b)]
		end

		local len = rotation_ID and 13 or 49
		local b = buffer.create(len)

		local __PACK_F32 = Binary_Descriptors.__PACK_F32
		local position = __PACK_F32(X, Y, Z)
		buffer.copy(b, 0, position)
		-- buffer.writef32(b, 0, X)
		-- buffer.writef32(b, 4, Y)
		-- buffer.writef32(b, 8, Z)

		if rotation_ID then
			buffer.writeu8(b, 12, rotation_ID)
		else
			buffer.writeu8(b, 12, 0x0)

			local xBasis = __PACK_F32(R00, R01, R02)
			buffer.copy(b, 13, xBasis)
			local yBasis = __PACK_F32(R10, R11, R12)
			buffer.copy(b, 13 + 12, yBasis)
			local zBasis = __PACK_F32(R20, R21, R22)
			buffer.copy(b, 13 + 24, zBasis)

			-- buffer.writef32(b, 13, R00)
			-- buffer.writef32(b, 17, R01)
			-- buffer.writef32(b, 21, R02)

			-- buffer.writef32(b, 25, R10)
			-- buffer.writef32(b, 29, R11)
			-- buffer.writef32(b, 33, R12)

			-- buffer.writef32(b, 37, R20)
			-- buffer.writef32(b, 41, R21)
			-- buffer.writef32(b, 45, R22)
		end

		return b, len
	end,
	["EnumItem"] = function(raw)
		local b_Name, Name_size = Binary_Descriptors["string"](tostring(raw.EnumType))

		local len = Name_size + 4
		local b = buffer.create(len)

		buffer.copy(b, 0, b_Name)
		buffer.writeu32(b, Name_size, raw.Value)

		return b, len
	end,
	["NumberSequence"] = nil,
	["NumberSequenceKeypoint"] = function(keypoint, b, offset)
		if not b then
			return Binary_Descriptors.__PACK_F32(keypoint.Envelope, keypoint.Time, keypoint.Value)
		end

		buffer.writef32(b, offset, keypoint.Envelope)
		offset += 4
		buffer.writef32(b, offset, keypoint.Time)
		offset += 4
		buffer.writef32(b, offset, keypoint.Value)
	end,
	["ColorSequence"] = nil,
	["ColorSequenceKeypoint"] = function(keypoint, b, offset)
		local Value = Binary_Descriptors["Color3"](keypoint.Value)

		if not b then
			b = buffer.create(20)
			offset = 0
		end

		buffer.writef32(b, offset, 0)
		offset += 4
		buffer.writef32(b, offset, keypoint.Time)
		offset += 4
		buffer.copy(b, offset, Value)

		return b, 20
	end,
	["NumberRange"] = function(raw)
		return Binary_Descriptors.__PACK_F32(raw.Min, raw.Max)
	end,
	["Rect"] = function(raw)
		return Binary_Descriptors.__PACK_MULTIPLE(Binary_Descriptors["Vector2"], raw.Min, raw.Max)
	end,
	["PhysicalProperties"] = function(raw) -- ? Not sure yet (https://github.com/RobloxAPI/spec/blob/master/properties/drafts/AttributesSerializeFull.md#physicalproperties)
		local len = 1
		if raw then
			len += 24
		end
		local b = buffer.create(len)

		buffer.writeu8(b, 0, raw and 3 or 0) -- 3 means it has set CustomPhysicalProperties & has set AcousticAbsorption

		if raw then
			buffer.writef32(b, 1, raw.Density)
			buffer.writef32(b, 5, raw.Friction)
			buffer.writef32(b, 9, raw.Elasticity)
			buffer.writef32(b, 13, raw.FrictionWeight)
			buffer.writef32(b, 17, raw.ElasticityWeight)
			buffer.writef32(b, 21, raw.AcousticAbsorption)
		end

		return b, len
	end,
	["Region3"] = function(raw)
		local Translation = raw.CFrame.Position
		local HalfSize = raw.Size * 0.5

		return Binary_Descriptors.__PACK_MULTIPLE(
			Binary_Descriptors["Vector3"],
			Translation - HalfSize, -- /App/util/Region3.cpp#L38
			Translation + HalfSize -- /App/util/Region3.cpp#L42
		)
	end,
	["Region3int16"] = function(raw)
		return Binary_Descriptors.__PACK_MULTIPLE(Binary_Descriptors["Vector3int16"], raw.Min, raw.Max)
	end,
	["Font"] = 636 < CLIENT_VERSION and function(raw)
		local string__descriptor = Binary_Descriptors["string"]

		local b_Family, Family_size = string__descriptor(raw.Family)
		local b_CachedFaceId, CachedFaceId_size = string__descriptor("")

		local len = 3 + Family_size + CachedFaceId_size
		local b = buffer.create(len)

		local ok_w, weight = pcall(index, raw, "Weight")
		local ok_s, style = pcall(index, raw, "Style")

		buffer.writeu16(b, 0, ok_w and weight.Value or 0)
		buffer.writeu8(b, 2, ok_s and style.Value or 0)

		buffer.copy(b, 3, b_Family)
		buffer.copy(b, 3 + Family_size, b_CachedFaceId)

		return b, len
	end or function(raw)
		local string__descriptor = Binary_Descriptors["string"]

		local b_Family, Family_size = string__descriptor(raw.Family)
		local b_CachedFaceId, CachedFaceId_size = string__descriptor("")

		local len = 3 + Family_size + CachedFaceId_size
		local b = buffer.create(len)

		local FontString = tostring(raw)

		local EmptyWeight = string_find(FontString, "Weight = ,")
		local EmptyStyle = string_find(FontString, "Style =  }")

		buffer.writeu16(b, 0, EmptyWeight and 0 or raw.Weight.Value)
		buffer.writeu8(b, 2, EmptyStyle and 0 or raw.Style.Value)

		buffer.copy(b, 3, b_Family)
		buffer.copy(b, 3 + Family_size, b_CachedFaceId)

		return b, len
	end,
	["SecurityCapabilities"] = function(raw)
		local b = buffer.create(8)

		if raw == BASE_CAPABILITIES then
			return b, 8
		end

		Binary_Descriptors.__writei64(b, 0, __COUNT_CAPABILITY_BITS(raw))

		return b, 8
	end,
	["Path2DControlPoint"] = function(raw)
		return Binary_Descriptors.__PACK_MULTIPLE(
			Binary_Descriptors["UDim2"],
			raw.Position,
			raw.LeftTangent,
			raw.RightTangent
		)
	end,
}

do -- Sequences
	Binary_Descriptors["NumberSequence"] =
		Binary_Descriptors.__construct_Sequence(Binary_Descriptors["NumberSequenceKeypoint"], 12)

	Binary_Descriptors["ColorSequence"] =
		Binary_Descriptors.__construct_Sequence(Binary_Descriptors["ColorSequenceKeypoint"], 20)
end

do -- Vectors
	Binary_Descriptors.__PACK_F32 = Binary_Descriptors.__construct__PACKER(true)

	Binary_Descriptors.__PACK_I16 = Binary_Descriptors.__construct__PACKER()
end

local ESCAPES_PATTERN = "[&<>\"'\0\1-\9\11-\12\14-\31\127-\255]" -- * The safe way is to escape all five characters in text. However, the three characters " ' and > needn't be escaped in text
-- %z (\0 aka NULL) might not be needed as Roblox automatically converts it to space everywhere it seems like
-- Characters from: https://create.roblox.com/docs/en-us/ui/rich-text#escape-forms
-- * EscapesPattern should be ordered from most common to least common characters for sake of speed
-- * Might wanna use their numerical codes instead of named codes for reduced file size (Could be an Option)
-- TODO Maybe we should invert the pattern to only allow certain characters (future-proof)
local ESCAPES = {
	["&"] = "&amp;", -- 38
	["<"] = "&lt;", -- 60
	[">"] = "&gt;", -- 62
	['"'] = "&#34;", --  quot
	["'"] = "&#39;", -- apos
	["\0"] = "",
}

for rangeStart, rangeEnd in string.gmatch(ESCAPES_PATTERN, "(.)%-(.)") do
	for charCode = string.byte(rangeStart), string.byte(rangeEnd) do
		ESCAPES[string.char(charCode)] = "&#" .. charCode .. ";"
	end
end

local XML_Descriptors
XML_Descriptors = {
	__CDATA = function(raw) -- ? Normally Roblox doesn't use CDATA unless the string has newline characters (\n); We rather CDATA everything for sake of speed
		return "<![CDATA[" .. raw .. "]]>"
	end,
	__NORMALIZE_NUMBER = function(raw)
		if raw ~= raw then
			return "NAN"
		elseif raw == math.huge then
			return "INF"
		elseif raw == -math.huge then
			return "-INF"
		end

		return raw
	end,
	__NORMALIZE_RANGE = function(raw)
		return raw ~= raw and "0" or raw -- Normally we should return "-nan(ind)" instead of "0" but this adds more compatibility
	end,
	__MINMAX = function(min, max, descriptor)
		return "<min>" .. descriptor(min) .. "</min><max>" .. descriptor(max) .. "</max>"
	end,
	__PROTECTEDSTRING = function(raw) -- ? its purpose is to "protect" data from being treated as ordinary character data during processing;
		return string_find(raw, "]]>") and string.gsub(raw, ESCAPES_PATTERN, ESCAPES) or XML_Descriptors.__CDATA(raw)
	end,
	__construct_Sequence = function(keypoint_handler)
		-- The value is the text content, formatted as a space-separated list of floating point numbers.
		-- tostring(raw) also works (but way slower rn)
		-- ? Trailing whitespace after Envelope is needed for lune compatibility
		return function(raw)
			local sequence = ""

			for _, keypoint in raw.Keypoints do
				sequence ..= keypoint_handler(keypoint)
			end

			return sequence
		end
	end,
	__VECTOR = function(X, Y, Z) -- Each element is a <float>
		local Value = "<X>" .. X .. "</X><Y>" .. Y .. "</Y>" -- There is no Vector without at least two Coordinates.. (Vector1, at least on Roblox)

		if Z then
			Value ..= "<Z>" .. Z .. "</Z>"
		end

		return Value
	end,
	--------------------------------------------------------------
	--------------------------------------------------------------
	--------------------------------------------------------------
	Axes = function(raw)
		-- The text of this element is formatted as an integer between 0 and 7

		return "<axes>" .. __COUNT_BITS(raw.X, raw.Y, raw.Z) .. "</axes>"
	end,

	-- ! Assuming all base64 encoded strings won't have newlines

	BinaryString = function(raw)
		return raw == "" and "" or base64encode(raw)
	end,

	BrickColor = function(raw)
		return raw.Number -- * Roblox encodes the tags as "int", but this is not required for Roblox to properly decode the type. For better compatibility, it is preferred that third-party implementations encode and decode "BrickColor" tags instead. Could also use "int" or "Color3uint8"
	end,
	CFrame = function(raw)
		local X, Y, Z, R00, R01, R02, R10, R11, R12, R20, R21, R22 = raw:GetComponents()
		return XML_Descriptors.__VECTOR(X, Y, Z)
			.. "<R00>"
			.. R00
			.. "</R00><R01>"
			.. R01
			.. "</R01><R02>"
			.. R02
			.. "</R02><R10>"
			.. R10
			.. "</R10><R11>"
			.. R11
			.. "</R11><R12>"
			.. R12
			.. "</R12><R20>"
			.. R20
			.. "</R20><R21>"
			.. R21
			.. "</R21><R22>"
			.. R22
			.. "</R22>",
		"CoordinateFrame"
	end,
	-- CFrameQuat = function(raw) -- ? This will probably never release as it's not even used anywhere naturally, but there are hints it does exist as a DataType
	-- 	local X, Y, Z, R00, R01, R02, R10, R11, R12, R20, R21, R22 = raw:GetComponents()
	-- 	local trace = R00 + R11 + R22
	-- 	local S, QW, QX, QY, QZ

	-- 	if trace > 0 then
	-- 		S = math.sqrt(1 + trace) * 2
	-- 		QW = 0.25 * S
	-- 		QX = (R21 - R12) / S
	-- 		QY = (R02 - R20) / S
	-- 		QZ = (R10 - R01) / S
	-- 	elseif (R00 > R11) and (R00 > R22) then
	-- 		S = math.sqrt(1 + R00 - R11 - R22) * 2
	-- 		QW = (R21 - R12) / S
	-- 		QX = 0.25 * S
	-- 		QY = (R01 + R10) / S
	-- 		QZ = (R02 + R20) / S
	-- 	elseif R11 > R22 then
	-- 		S = math.sqrt(1 + R11 - R00 - R22) * 2
	-- 		QW = (R02 - R20) / S
	-- 		QX = (R01 + R10) / S
	-- 		QY = 0.25 * S
	-- 		QZ = (R12 + R21) / S
	-- 	else
	-- 		S = math.sqrt(1 + R22 - R00 - R11) * 2
	-- 		QW = (R10 - R01) / S
	-- 		QX = (R02 + R20) / S
	-- 		QY = (R12 + R21) / S
	-- 		QZ = 0.25 * S
	-- 	end

	-- 	return XML_Descriptors.__VECTOR(X, Y, Z)
	-- 		.. "<QX>"
	-- 		.. QX
	-- 		.. "</QX><QY>"
	-- 		.. QY
	-- 		.. "</QY><QZ>"
	-- 		.. QZ
	-- 		.. "</QZ><QW>"
	-- 		.. QW
	-- 		.. "</QW>"
	-- end,
	Color3 = function(raw) -- Each element is a <float>
		return "<R>" .. raw.R .. "</R><G>" .. raw.G .. "</G><B>" .. raw.B .. "</B>" -- ? It is recommended that Color3 is encoded with elements instead of text.
	end,
	Color3uint8 = function(raw)
		-- https://github.com/rojo-rbx/rbx-dom/blob/master/docs/xml.md#color3uint8
		-- ? It is recommended that Color3uint8 is encoded with text instead of elements.

		return 0xFF000000
			+ (math.floor(raw.R * 255) * 0x10000)
			+ (math.floor(raw.G * 255) * 0x100)
			+ math.floor(raw.B * 255)
		-- return bit32.bor(
		-- 	bit32.bor(bit32.bor(bit32.lshift(0xFF, 24), bit32.lshift(0xFF * raw.R, 16)), bit32.lshift(0xFF * raw.G, 8)),
		-- 	0xFF * raw.B
		-- )

		-- return tonumber(string.format("0xFF%02X%02X%02X",raw.R*255,raw.G*255,raw.B*255))
	end,
	ColorSequence = nil,
	ColorSequenceKeypoint = function(keypoint)
		local __NORMALIZE_RANGE = XML_Descriptors.__NORMALIZE_RANGE

		local color3 = keypoint.Value

		return __NORMALIZE_RANGE(keypoint.Time)
			.. " "
			.. __NORMALIZE_RANGE(color3.R)
			.. " "
			.. __NORMALIZE_RANGE(color3.G)
			.. " "
			.. __NORMALIZE_RANGE(color3.B)
			.. " 0 "
	end,
	Content = function(raw) -- TODO Not sure about Object & Opaque, run tests when possible
		local SourceType = raw.SourceType
		return SourceType == Enum.ContentSourceType.None and "<null></null>"
			or SourceType == Enum.ContentSourceType.Uri and "<uri>" .. XML_Descriptors.string(raw.Uri) .. "</uri>"
			or SourceType == Enum.ContentSourceType.Object and "<Ref>" .. GetRef(raw.Object) .. "</Ref>"
			or SourceType == Enum.ContentSourceType.Opaque and "<Ref>" .. GetRef(raw.Opaque) .. "</Ref>"
	end,
	ContentId = function(raw)
		return raw == "" and "<null></null>" or "<url>" .. XML_Descriptors.string(raw) .. "</url>", "Content" -- TODO Remove "Content" str once Roblox fully releases Content DataType
	end,
	CoordinateFrame = function(raw)
		return "<CFrame>" .. XML_Descriptors.CFrame(raw) .. "</CFrame>"
	end,
	-- DateTime = function(raw) return raw.UnixTimestampMillis end, -- ? Not sure
	EnumItem = function(raw)
		return raw.Value, "token"
	end,
	Faces = function(raw)
		-- The text of this element is formatted as an integer between 0 and 63
		return "<faces>" .. __COUNT_BITS(raw.Right, raw.Top, raw.Back, raw.Left, raw.Bottom, raw.Front) .. "</faces>"
	end,
	Font = 636 < CLIENT_VERSION
		and function(raw)
			-- TODO (OPTIONAL ELEMENT): Figure out how to determine (ContentId) <CachedFaceId><url>rbxasset://fonts/GothamSSm-Medium.otf</url></CachedFaceId>
				--[[
		? game:GetService("TextService"):GetFontMemoryData()
		? rbxasset://fonts/families/{Enum.Font.BuilderSans.Name}.json
		]]

			local ok_w, weight = pcall(index, raw, "Weight")
			local ok_s, style = pcall(index, raw, "Style")

			return "<Family>"
			.. XML_Descriptors.ContentId(raw.Family)
			.. "</Family><Weight>"
			.. (ok_w and XML_Descriptors.EnumItem(weight) or "")
			.. "</Weight><Style>"
			.. (ok_s and style.Name or "") -- Weird but this field accepts .Name of enum instead..
			.. "</Style>"
		end
		or function(raw)
			local FontString = tostring(raw) -- TODO: Temporary fix

			local EmptyWeight = string_find(FontString, "Weight = ,")
			local EmptyStyle = string_find(FontString, "Style =  }")

			return "<Family>"
			.. XML_Descriptors.ContentId(raw.Family)
			.. "</Family><Weight>"
			.. (EmptyWeight and "" or XML_Descriptors.EnumItem(raw.Weight))
			.. "</Weight><Style>"
			.. (EmptyStyle and "" or raw.Style.Name) -- Weird but this field accepts .Name of enum instead..
			.. "</Style>"
		end,
	NetAssetRef = nil,
	NumberRange = function(raw) -- tostring(raw) also works
		-- The value is the text content, formatted as a space-separated list of floating point numbers.
		local __NORMALIZE_RANGE = XML_Descriptors.__NORMALIZE_RANGE

		return __NORMALIZE_RANGE(raw.Min) .. " " .. __NORMALIZE_RANGE(raw.Max) --[[.. " "]] -- ! This might be required for compatibility; __NORMALIZE_RANGE is not needed here but it fixes the issue where "nan 10" value would reset to "0 0"
	end,
	NumberSequence = nil,
	NumberSequenceKeypoint = function(keypoint)
		local __NORMALIZE_RANGE = XML_Descriptors.__NORMALIZE_RANGE

		return __NORMALIZE_RANGE(keypoint.Time)
			.. " "
			.. __NORMALIZE_RANGE(keypoint.Value)
			.. " "
			.. __NORMALIZE_RANGE(keypoint.Envelope)
			.. " "
	end,
	-- Path2DControlPoint = function(raw)  -- ? Not sure
	-- 	local udim2 = XML_Descriptors.UDim2
	-- 	return "<Position>"
	-- 		.. udim2(raw.Position)
	-- 		.. "</Position>"
	-- 		.. "<LeftTangent>"
	-- 		.. udim2(raw.LeftTangent)
	-- 		.. "</LeftTangent>"
	-- 		.. "<RightTangent>"
	-- 		.. udim2(raw.RightTangent)
	-- 		.. "</RightTangent>"
	-- end,

	PhysicalProperties = function(raw)
		--[[
			Contains at least one CustomPhysics element, which is interpreted according to the bool type. If this value is true, then the tag also contains an element for each component of the PhysicalProperties:

			Density
			Friction
			Elasticity
			FrictionWeight
			ElasticityWeight
			AcousticAbsorption

			The value of each component is represented by the text content formatted as a 32-bit floating point number (see float)
		]]

		local CustomPhysics = "<CustomPhysics>" .. XML_Descriptors.bool(raw and true or false) .. "</CustomPhysics>"

		return raw
			and CustomPhysics .. "<Density>" .. raw.Density .. "</Density><Friction>" .. raw.Friction .. "</Friction><Elasticity>" .. raw.Elasticity .. "</Elasticity><FrictionWeight>" .. raw.FrictionWeight .. "</FrictionWeight><ElasticityWeight>" .. raw.ElasticityWeight .. "</ElasticityWeight><AcousticAbsorption>" .. raw.AcousticAbsorption .. "</AcousticAbsorption>"
			or CustomPhysics
	end,
	-- ProtectedString = function(raw) return tostring(raw), "ProtectedString" end,
	Ray = function(raw)
		local vector3 = XML_Descriptors.Vector3

		return "<origin>" .. vector3(raw.Origin) .. "</origin><direction>" .. vector3(raw.Direction) .. "</direction>"
	end,
	Rect = function(raw)
		return XML_Descriptors.__MINMAX(raw.Min, raw.Max, XML_Descriptors.Vector2), "Rect2D"
	end,
	Region3 = function(raw) -- ? Not sure about xml format yet, the math is correct though (/Network/Replicator.cpp#L1306)
		local Translation = raw.CFrame.Position
		local HalfSize = raw.Size * 0.5

		return XML_Descriptors.__MINMAX(
			Translation - HalfSize, -- /App/util/Region3.cpp#L38
			Translation + HalfSize, -- /App/util/Region3.cpp#L42
			XML_Descriptors.Vector3
		)
	end,
	Region3int16 = function(raw) -- ? Not sure yet (/App/v8tree/EnumProperty.cpp#L346)
		return XML_Descriptors.__MINMAX(raw.Min, raw.Max, XML_Descriptors.Vector3int16)
	end,
	SharedString = function(raw)
		raw = raw == "" and "" or base64encode(raw)

		local Identifier = SharedString_identifiers[raw]

		if SharedStrings[Identifier] == nil then
			SharedStrings[Identifier] = raw
		end

		return Identifier
	end,
	SecurityCapabilities = function(raw)
		if raw == BASE_CAPABILITIES then
			return 0
		end

		return __COUNT_CAPABILITY_BITS(raw)
	end,
	-- SystemAddress = function(raw) return raw end, -- PeerId? systemAddress as a string in the format "IP|Port", "|" being portDelineator, should not be '.', ':', '%', '-', '/', a number, or a-f  -- ? Not sure
	-- TweenInfo = function(raw) -- ? Not sure
	-- 	local __NORMALIZE_NUMBER = XML_Descriptors.__NORMALIZE_NUMBER
	-- 	local EnumItem = XML_Descriptors.EnumItem

	-- 	return "<Time>"
	-- 		.. __NORMALIZE_NUMBER(raw.Time)
	-- 		.. "</Time><DelayTime>"
	-- 		.. __NORMALIZE_NUMBER(raw.DelayTime)
	-- 		.. "</DelayTime><RepeatCount>"
	-- 		.. __NORMALIZE_NUMBER(raw.RepeatCount)
	-- 		.. "</RepeatCount><Reverses>"
	-- 		.. XML_Descriptors.bool(raw.Reverses)
	-- 		.. "</Reverses><EasingDirection>"
	-- 		.. enum(raw.EasingDirection)
	-- 		.. "</EasingDirection><EasingStyle>"
	-- 		.. enum(raw.EasingStyle)
	-- 		.. "</EasingStyle>"
	-- end,
	UDim = function(raw)
		--[[
			S: Represents the Scale component. Interpreted as a <float>.
			O: Represents the Offset component. Interpreted as an <int>.
		]]

		return "<S>" .. raw.Scale .. "</S><O>" .. raw.Offset .. "</O>"
	end,
	UDim2 = function(raw)
		--[[
			XS: Represents the X.Scale component. Interpreted as a <float>.
			XO: Represents the X.Offset component. Interpreted as an <int>.
			YS: Represents the Y.Scale component. Interpreted as a <float>.
			YO: Represents the Y.Offset component. Interpreted as an <int>.
		]]

		local X, Y = raw.X, raw.Y

		return "<XS>"
			.. X.Scale
			.. "</XS><XO>"
			.. X.Offset
			.. "</XO><YS>"
			.. Y.Scale
			.. "</YS><YO>"
			.. Y.Offset
			.. "</YO>"
	end,

	-- UniqueId = function(raw) -- ? Not sure  -- ? No idea if this even needs a Descriptor
	-- 	--[[
	-- 		UniqueId properties might be random everytime Studio saves a place file
	-- 		and don't have a use right now outside of packages, which SSI doesn't
	-- 		account for anyway. They generate diff noise, so we shouldn't serialize
	-- 		them until we have to.
	-- 	]]
	-- 	-- https://github.com/MaximumADHD/Roblox-Client-Tracker/blob/master/LuaPackages/Packages/_Index/ApolloClient/ApolloClient/utilities/common/makeUniqueId.lua#L68
	-- 	return raw -- seems to be string type by default
	-- end,

	Vector2 = function(raw)
		--[[
			X: Represents the X component. Interpreted as a <float>.
			Y: Represents the Y component. Interpreted as a <float>.
		]]
		return XML_Descriptors.__VECTOR(raw.X, raw.Y)
	end,
	Vector2int16 = nil,
	-- Vector2int16 = Descriptors.Vector2, -- except as <int>
	Vector3 = function(raw)
		--[[
			X: Represents the X component. Interpreted as a <float>.
			Y: Represents the Y component. Interpreted as a <float>.
			Z: Represents the Z component. Interpreted as a <float>.
		]]
		return XML_Descriptors.__VECTOR(raw.X, raw.Y, raw.Z)
	end,
	Vector3int16 = nil,
	-- Vector3int16 = Descriptors.Vector3, -- except as <int>\
	bool = function(raw)
		return raw and "true" or "false"
	end,
	double = nil, -- Float64
	float = nil, -- Float32
	int = nil, -- Int32
	int64 = nil, -- Int64 (long)
	string = function(raw)
		return (raw == nil or raw == "") and ""
			or string_find(raw, "]]>") and string.gsub(raw, ESCAPES_PATTERN, ESCAPES)
			or XML_Descriptors.__CDATA(string.gsub(raw, "\0", ""))
	end,

	--------------------------------------------------------------
	-----------%localappdata%/Roblox/GlobalSettings_13.xml--------
	-----------------------settings().Studio----------------------
	--------------------------------------------------------------
	-- QDir = function(raw) -- ? Not sure
	-- 	return raw
	-- end,
	-- QFont = function(raw) -- ? Not sure
	-- 	return raw
	-- end,
}

do -- Sequences
	XML_Descriptors.NumberSequence = XML_Descriptors.__construct_Sequence(XML_Descriptors.NumberSequenceKeypoint)

	XML_Descriptors.ColorSequence = XML_Descriptors.__construct_Sequence(XML_Descriptors.ColorSequenceKeypoint)
end

for descriptorName, redirectName in
	{
		NetAssetRef = "SharedString",
		Vector2int16 = "Vector2",
		Vector3int16 = "Vector3",
		double = "__NORMALIZE_NUMBER",
		float = "__NORMALIZE_NUMBER",
		int = "__NORMALIZE_NUMBER",
		int64 = "__NORMALIZE_NUMBER",
	}
do
	XML_Descriptors[descriptorName] = XML_Descriptors[redirectName]
end

if CLIENT_VERSION < math.huge then -- math.huge because unknown yet
	-- ! For sake of compatibility with older clients, Roblox currently does this too but it WILL probably change in the future so keep track of that. ONCE ROBLOX MOVES AWAY FROM THIS, MAKE SURE TO KEEP SUPPORT FOR VERY OLD CLIENTS; 645 <= CLIENT Ver < ??? (ver when roblox moves away), THIS IS COMPLICATED SO PROBABLY NO SUPPORT, JUST USE OLDER VER OF USSI; NEWEST CLIENTS
	XML_Descriptors.Content = XML_Descriptors.ContentId
end

local ClassList

do
	local ClassPropertyExceptions = {
		Whitelist = {
			MeshPart = ArrayToDict({ "CollisionFidelity" }),
			PartOperation = ArrayToDict({ "CollisionFidelity" }),
			TriangleMeshPart = ArrayToDict({ "CollisionFidelity" }),
		},
		Blacklist = {
			LuaSourceContainer = ArrayToDict({ "ScriptGuid" }),
			Instance = ArrayToDict({ "UniqueId", "HistoryId" }),
		},
	}

	local function AttributesSerialize(attrs)
		-- * There are certain restrictions for names of attributes
		-- https://create.roblox.com/docs/reference/engine/classes/Instance#SetAttribute
		-- But it seems like even if those are present, Studio still opens the file just fine
		-- So there is no need to check for them currently

		-- ? Return early for empty tags (this proved equally as fast when done using counter/next)

		local attrs_n = 0
		local buffer_size = 4
		local attrs_sorted = {}
		local attrs_formatted = table.clone(attrs)
		for attr, val in attrs do
			attrs_n += 1
			attrs_sorted[attrs_n] = attr

			local Type = typeof(val)

			local Descriptor = Binary_Descriptors[Type]
			local attr_size

			attrs_formatted[attr], attr_size = Descriptor(val)

			buffer_size += 5 + #attr + attr_size
		end

		table.sort(attrs_sorted)

		local b = buffer.create(buffer_size)

		buffer.writeu32(b, 0, attrs_n)

		local string__descriptor = Binary_Descriptors["string"]
		local offset = 4
		for _, attr in attrs_sorted do
			local b_Name, Name_size = string__descriptor(attr)

			buffer.copy(b, offset, b_Name)
			offset += Name_size

			buffer.writeu8(b, offset, attr_Type_IDs[typeof(attrs[attr])])
			offset += 1

			local bb = attrs_formatted[attr]

			buffer.copy(b, offset, bb)
			offset += buffer.len(bb)
		end

		return buffer.tostring(b)
	end

	local function AttenuationSerialize(attenuations)
		if not next(attenuations) then
			return "\0" -- ? [CONSTANT] Version byte (likely)
		end

		local attenuations_n = 0

		local attenuations_sorted = {}

		for key in attenuations do
			attenuations_n += 1
			attenuations_sorted[attenuations_n] = key
		end

		table.sort(attenuations_sorted) -- ? Seems to be sorted by default, just in case

		local b = buffer.create(1 + attenuations_n * 8)

		local offset = 1
		for _, key in attenuations_sorted do
			buffer.writef32(b, offset, key)
			offset += 4
			buffer.writef32(b, offset, attenuations[key]) -- volume
			offset += 4
		end

		return buffer.tostring(b)
	end

	local function TransformsSerialize(transforms)
		local transforms_n = #transforms

		if transforms_n == 0 then
			return "\1\0\0\0\0\0\0\0"
		end

		local b = buffer.create(8 + transforms_n * 48)

		buffer.writeu32(b, 0, 1) -- ? [CONSTANT] Version byte (likely)
		buffer.writeu32(b, 4, transforms_n)

		local __PACK_F32 = Binary_Descriptors.__PACK_F32

		local offset = 8
		for _, transform in transforms do
			local X, Y, Z, R00, R01, R02, R10, R11, R12, R20, R21, R22 = transform:GetComponents()

			local xBasis = __PACK_F32(R00, R01, R02)
			buffer.copy(b, offset, xBasis)
			offset += 12

			local yBasis = __PACK_F32(R10, R11, R12)
			buffer.copy(b, offset, yBasis)
			offset += 12

			local zBasis = __PACK_F32(R20, R21, R22)
			buffer.copy(b, offset, zBasis)
			offset += 12

			local position = __PACK_F32(X, Y, Z)
			buffer.copy(b, offset, position)
			offset += 12
		end

		return buffer.tostring(b)
	end

	local NotScriptableFixes = { --[[
		For more info:
		- https://github.com/luau/UniversalSynSaveInstance/blob/main/Tools/NotScriptable-Related/Potentially%20Missing%20Properties%20Dumper/Potentially%20Missing%20Properties%20Dumper.luau
		- https://github.com/luau/UniversalSynSaveInstance/blob/main/Tools/NotScriptable-Related/NotScriptable%20Dumper/NotScriptable%20Dumper.py
		]]
		Instance = {
			AttributesSerialize = function(instance)
				local attrs = instance:GetAttributes()

				if not next(attrs) then
					return ""
				end

				return AttributesSerialize(attrs)
			end,
			DefinesCapabilities = "Sandboxed",
			Tags = function(instance)
				-- https://github.com/RobloxAPI/spec/blob/master/properties/Tags.md

				local tags = service.CollectionService:GetTags(instance) -- ? Seems faster than instance:GetTags

				if #tags == 0 then
					return ""
				end

				return table.concat(tags, "\0")
			end,
		},
		Path2D = {
			PropertiesSerialize = function(instance)
				local control_points = instance:GetControlPoints()
				local control_points_n = #control_points

				if control_points_n == 0 then
					return "\0\0\0\0"
				end

				local b = buffer.create(4 + control_points_n * 49)
				buffer.writeu32(b, 0, control_points_n)

				local TypeID_Path2DControlPoint = attr_Type_IDs["Path2DControlPoint"]
				local Path2DControlPoint_descriptor = Binary_Descriptors["Path2DControlPoint"]

				local offset = 4
				for i, point in control_points do
					local buf = Path2DControlPoint_descriptor(point)

					buffer.writeu8(b, offset, TypeID_Path2DControlPoint)
					offset += 1

					buffer.copy(b, offset, buf)
					offset += 48
				end

				return buffer.tostring(b)
			end,
		},
		PlayerEmulatorService = {
			SerializedEmulatedPolicyInfo = function(instance)
				local EmulatedPolicyInfo = instance:GetEmulatedPolicyInfo()

				if not next(EmulatedPolicyInfo) then
					return ""
				end

				return AttributesSerialize(EmulatedPolicyInfo)
			end,
		},
		StyleRule = {
			PropertiesSerialize = function(instance)
				local props = instance:GetProperties()

				if not next(props) then
					return "\0\0\0\0" -- ! Essential
				end

				return AttributesSerialize(props)
			end,
		},
		StyleQuery = {
			ConditionsSerialize = function(instance)
				local props = instance:GetConditions()

				if not next(props) then
					return "\0\0\0\0"
				end

				return AttributesSerialize(props)
			end,
		},
		MarkerCurve = {
			ValuesAndTimes = function(instance)
				local markers = instance:GetMarkers()
				local markers_n = #markers

				if markers_n == 0 then
					-- return "" -- Seems to also work
					return "\2\0\0\0\0\0\0\0\1\0\0\0\0\0\0\0"
				end

				local strings_size = 0
				for i, marker in markers do
					strings_size += #marker.Value + 1
				end

				local b = buffer.create(8 + strings_size + 8 + (markers_n * 4))

				-- Values section
				buffer.writeu32(b, 0, 2) -- Constant
				buffer.writeu32(b, 4, markers_n)

				local offset = 8
				for i, marker in markers do
					local value = marker.Value
					buffer.writestring(b, offset, value)
					offset += #value + 1
					-- buffer.writeu8(b, offset, 0) -- Null terminator
					-- offset += 1
				end

				-- Times section (as 2400x scaled integers)
				buffer.writeu32(b, offset, 1) -- Constant
				offset += 4
				buffer.writeu32(b, offset, markers_n)
				offset += 4

				for i, marker in markers do
					local scaled_time = math.round(marker.Time * 2400)
					buffer.writeu32(b, offset, scaled_time)
					offset += 4
				end

				return buffer.tostring(b)
			end,
		},
		AnimationNodeDefinition = {
			InputPinData = function(instance)
				local input_pins = instance:GetInputPins()

				local input_pins_n = #input_pins

				if input_pins_n == 0 then
					return "\1\0\0\0\0\0\0\0"
				end

				local buffer_size = 8

				for _, pin in input_pins do
					buffer_size += 4 + #pin
				end

				local b = buffer.create(buffer_size)

				buffer.writeu32(b, 0, 1) -- ? [CONSTANT] Version byte (likely)
				buffer.writeu32(b, 4, input_pins_n)

				local string__descriptor = Binary_Descriptors["string"]
				local offset = 8
				for _, pin in input_pins do
					local b_pin, pin_size = string__descriptor(pin)

					buffer.copy(b, offset, b_pin)
					offset += pin_size
				end

				return buffer.tostring(b)
			end,
		},
		AnimationRigData = {
			label = function(instance)
				local labels = instance:GetLabels() -- RobloxScriptSecurity
				local labels_n = #labels

				if labels_n == 0 then
					return "\1\0\0\0\0\0\0\0"
				end

				local b = buffer.create(8 + labels_n * 4)

				buffer.writeu32(b, 0, 1) -- ? [CONSTANT] Version byte (likely)
				buffer.writeu32(b, 4, labels_n)

				local offset = 8

				for _, label in labels do
					buffer.writeu32(b, offset, label)
					offset += 4
				end

				return buffer.tostring(b)
			end,
			name = function(instance)
				local names = instance:GetNames() -- RobloxScriptSecurity
				local names_n = #names

				if names_n == 0 then
					return "\1\0\0\0\0\0\0\0"
				end

				local buffer_size = 8

				for _, name in names do
					buffer_size += 4 + #name
				end

				local b = buffer.create(buffer_size)

				buffer.writeu32(b, 0, 1) -- ? [CONSTANT] Version byte (likely)
				buffer.writeu32(b, 4, names_n)

				local offset = 8

				for _, name in names do
					buffer.writeu32(b, offset, #name)
					offset += 4
				end
				for _, name in names do
					buffer.writestring(b, offset, name)
					offset += #name
				end

				return buffer.tostring(b)
			end,
			parent = function(instance)
				local parents = instance:GetParents() -- RobloxScriptSecurity
				local parents_n = #parents

				if parents_n == 0 then
					return "\1\0\0\0\0\0\0\0"
				end

				local b = buffer.create(8 + #parents * 2)

				buffer.writeu32(b, 0, 1) -- ? [CONSTANT] Version byte (likely)
				buffer.writeu32(b, 4, parents_n)

				local offset = 8

				for _, parent in parents do
					buffer.writeu16(b, offset, parent) -- ? likely u8 with \0 (Null) terminators but this is safer in case they overflow beyond 255 values
					offset += 2
				end

				return buffer.tostring(b)
			end,
			postTransform = function(instance)
				return TransformsSerialize(instance:GetPostTransforms()) -- RobloxScriptSecurity
			end,
			preTransform = function(instance)
				return TransformsSerialize(instance:GetPreTransforms()) -- RobloxScriptSecurity
			end,
			transform = function(instance)
				return TransformsSerialize(instance:GetTransforms()) -- RobloxScriptSecurity
			end,
		},
		AudioDeviceInput = {
			AccessList = function(instance) -- CanSave & CanLoad false
				local userid_accesslist = instance:GetUserIdAccessList()

				local uid_n = #userid_accesslist

				if uid_n == 0 then
					return ""
				end

				local b = buffer.create(uid_n * 8)

				local __writei64 = Binary_Descriptors.__writei64

				local offset = 0
				for _, user_id in userid_accesslist do
					__writei64(b, offset, user_id)
					offset += 8
				end

				return buffer.tostring(b)
			end,
		},
		AudioEmitter = {
			AngleAttenuation = function(instance)
				return AttenuationSerialize(instance:GetAngleAttenuation())
			end,
			DistanceAttenuation = function(instance)
				return AttenuationSerialize(instance:GetDistanceAttenuation())
			end,
		},
		AudioListener = {
			AngleAttenuation = function(instance)
				return AttenuationSerialize(instance:GetAngleAttenuation())
			end,
			DistanceAttenuation = function(instance)
				return AttenuationSerialize(instance:GetDistanceAttenuation())
			end,
		},
		-- DebuggerBreakpoint = {line="Line"}, -- ? This shouldn't appear in live games (try to prove this wrong)
		BallSocketConstraint = { MaxFrictionTorqueXml = "MaxFrictionTorque" },
		BasePart = {
			Color3uint8 = "Color",
			MaterialVariantSerialized = "MaterialVariant",
			size = "Size",
		},
		DoubleConstrainedValue = { value = "Value" },
		IntConstrainedValue = { value = "Value" },

		-- CustomEvent = {PersistedCurrentValue=function(instance) -- * Class is Deprecated and :SetValue doesn't seem to affect GetCurrentValue anymore
		-- 	local Receiver  = instance:GetAttachedReceivers()[1]
		-- 	if Receiver then
		-- 		return Receiver:GetCurrentValue()
		-- 	else
		-- 		error("No Receiver", 2)
		-- 	end
		-- end},
		Terrain = {
			AcquisitionMethod = "LastUsedModificationMethod", -- ? Not sure, RobloxScriptSecurity
			MaterialColors = function(instance) -- https://github.com/RobloxAPI/spec/blob/master/properties/MaterialColors.md
				local TERRAIN_MATERIAL_COLORS =
					{ --https://github.com/rojo-rbx/rbx-dom/blob/master/rbx_dom_lua/src/customProperties.lua#L5
						Enum.Material.Grass,
						Enum.Material.Slate,
						Enum.Material.Concrete,
						Enum.Material.Brick,
						Enum.Material.Sand,
						Enum.Material.WoodPlanks,
						Enum.Material.Rock,
						Enum.Material.Glacier,
						Enum.Material.Snow,
						Enum.Material.Sandstone,
						Enum.Material.Mud,
						Enum.Material.Basalt,
						Enum.Material.Ground,
						Enum.Material.CrackedLava,
						Enum.Material.Asphalt,
						Enum.Material.Cobblestone,
						Enum.Material.Ice,
						Enum.Material.LeafyGrass,
						Enum.Material.Salt,
						Enum.Material.Limestone,
						Enum.Material.Pavement,
					}

				local b = buffer.create(69) -- 69 bytes: 6 reserved + 63 for colors (21 materials * 3 components)
				local offset = 6 -- 6 reserved bytes

				local RGB_components = { "R", "G", "B" }

				for _, material in TERRAIN_MATERIAL_COLORS do
					local color = instance:GetMaterialColor(material)
					for _, component in RGB_components do
						buffer.writeu8(b, offset, math.floor(color[component] * 255)) -- ? math.floor seems unneeded but it makes it faster
						offset += 1
					end
				end

				return buffer.tostring(b)
			end,
		},
		TriangleMeshPart = {
			FluidFidelityInternal = "FluidFidelity",
		},
		MeshPart = { InitialSize = "MeshSize" },
		PartOperation = { InitialSize = "MeshSize" },
		Part = { shape = "Shape" },
		TrussPart = { style = "Style" },
		FormFactorPart = {
			formFactorRaw = "FormFactor",
		},
		Fire = { heat_xml = "Heat", size_xml = "Size" },
		Humanoid = { Health_XML = "Health" },
		HumanoidDescription = {
			EmotesDataInternal = function(instance)
				local emotes_data = ""
				for name, ids in instance:GetEmotes() do
					emotes_data ..= name .. "^" .. table.concat(ids, "^") .. "^\\"
				end
				return emotes_data
			end,
			EquippedEmotesDataInternal = function(instance)
				local equipped_emotes_data = ""
				for _, emote in instance:GetEquippedEmotes() do
					equipped_emotes_data ..= emote.Slot .. "^" .. emote.Name .. "\\"
				end
				return equipped_emotes_data
			end,
		},
		LocalizationTable = {
			Contents = function(instance)
				return instance:GetContents() --service.HttpService:JSONEncode(instance:GetEntries())
			end,
		},
		MaterialService = { Use2022MaterialsXml = "Use2022Materials" }, -- RobloxScriptSecurity

		Model = {
			ScaleFactor = function(instance)
				return instance:GetScale()
			end,
			WorldPivotData = "WorldPivot", -- TODO This doesn't accurately represent whether optional type property is present or not (it's never nil), gethiddenproperty or gethiddenproperty_fallback is preferred
		},
		PackageLink = { PackageIdSerialize = "PackageId", VersionIdSerialize = "VersionNumber" },
		Players = { MaxPlayersInternal = "MaxPlayers", PreferredPlayersInternal = "PreferredPlayers" }, -- ? Only needed for execs that lack LocalUserSecurity (Level 2, 5, 9), even so, it's a pretty useless information as it can be viewed elsewhere

		StarterPlayer = { AvatarJointUpgrade_Serialized = "AvatarJointUpgrade" },
		Smoke = { size_xml = "Size", opacity_xml = "Opacity", riseVelocity_xml = "RiseVelocity" },
		Sound = {
			xmlRead_MaxDistance_3 = "RollOffMaxDistance", -- * Also MaxDistance
		},
		-- ViewportFrame = { -- * Pointless because these reflect CurrentCamera's properties
		-- 	CameraCFrame = function(instance) -- *
		-- 		local CurrentCamera = instance.CurrentCamera
		-- 		if CurrentCamera then
		-- 			return CurrentCamera.CFrame
		-- 		else
		-- 			error("No CurrentCamera", 2)
		-- 		end
		-- 	end,
		-- 	-- CameraFieldOfView =
		-- },
		WeldConstraint = {
			Part0Internal = "Part0",
			Part1Internal = "Part1",
			-- State = function(instance)
			-- 	-- If untouched then default state is 3 (default true)
			-- 	return instance.Enabled and 1 or 0
			-- end,
		},
		Workspace = {
			-- SignalBehavior2 = "SignalBehavior", -- * Both are NotScriptable so it doesn't make sense to keep
			CollisionGroupData = function()
				local collision_groups = game:GetService("PhysicsService"):GetRegisteredCollisionGroups()

				local col_groups_n = #collision_groups

				if col_groups_n == 0 then
					return "\1\0"
				end

				local buffer_size = 2 -- Initial size

				for _, group in collision_groups do
					buffer_size += 7 + #group.name
				end

				local b = buffer.create(buffer_size)

				buffer.writeu8(b, 0, 1) -- ? [CONSTANT] Version byte (likely)
				buffer.writeu8(b, 1, col_groups_n) -- Group count

				local TypeID_int32 = attr_Type_IDs["int32"]
				local offset = 2
				for i, group in collision_groups do
					local name, id, mask = group.name, i - 1, group.mask
					local name_len = #name

					buffer.writeu8(b, offset, id) -- ID
					offset += 1

					buffer.writeu8(b, offset, TypeID_int32) -- ? Type ID for int32 (0x04)
					offset += 1

					buffer.writei32(b, offset, mask) -- Mask value as signed 32-bit integer
					offset += 4

					buffer.writeu8(b, offset, name_len) -- Name length
					offset += 1
					buffer.writestring(b, offset, name) -- Name
					offset += name_len
				end

				return buffer.tostring(b)
			end,
		},
	}

	local function FetchAPI()
		-- Credits @MaximumADHD

		local API_Dump

		local ok, err = pcall(function()
			if EXECUTOR_NAME == "Velocity" then -- TODO Temp fix as it crashes on HttpGet for sites that return 403 code
				return
			end

			local CLIENT_VERSION_str = tostring(CLIENT_VERSION)
			local ok, result = pcall(readfile, CLIENT_VERSION_str)
			if
				ok
				and result
				and result ~= ""
				and pcall(service.HttpService.JSONDecode, service.HttpService, result)
			then
				API_Dump = result
				return
			end

			local matching_versions, is_matched = {}

			-- * https://setup.rbxcdn.com/versionQTStudio seems to be a bit behind DeployHistory.txt
			local DeployHistory = string.split(game:HttpGet("https://setup.rbxcdn.com/DeployHistory.txt", true), "\n")
			for i = #DeployHistory, 1, -1 do
				local line = DeployHistory[i]

				local file_version = string.match(line, "file version: ([%d, ]+)")
				if file_version then
					if string.split(file_version, ", ")[2] == CLIENT_VERSION_str then
						is_matched = true

						local version_hash = string.match(line, "(version%-[^%s]+)")
						if version_hash then
							matching_versions[version_hash] = true
						end
					elseif is_matched then
						break
					end
				end
			end

			for version_hash in matching_versions do
				ok, result = pcall(
					game.HttpGet,
					game,
					"https://setup.rbxcdn.com/" .. version_hash .. "-Full-API-Dump.json",
					true
				)
				if ok then
					local o, r = pcall(service.HttpService.JSONDecode, service.HttpService, result)
					if o then
						API_Dump = service.HttpService:JSONEncode(r.Classes) -- minify it
						break
					end
				end
			end
			if writefile then
				writefile(CLIENT_VERSION_str, API_Dump)
			end
		end)

		if not ok or not API_Dump then
			warn("[DEBUG] Failed to get " .. version() .. " version API Dump, trying latest..")
			warn("[DEBUG]", err)
			API_Dump = service.HttpService:JSONEncode(
				service.HttpService:JSONDecode(
					game:HttpGet(
						"https://raw.githubusercontent.com/MaximumADHD/Roblox-Client-Tracker/roblox/Mini-API-Dump.json",
						true
					)
				).Classes
			)
		end

		local classList = {}

		local ClassesWhitelist, ClassesBlacklist = ClassPropertyExceptions.Whitelist, ClassPropertyExceptions.Blacklist

		for _, API_Class in service.HttpService:JSONDecode(API_Dump) do
			local ClassProperties, ClassProperties_size = {}, 1
			local Class = {
				Properties = ClassProperties,
				Superclass = API_Class.Superclass,
				-- Tags = {},
				NotCreatable = nil,
			}

			local ClassName = API_Class.Name
			local ClassTags = API_Class.Tags

			if ClassTags then
				local Tags = ArrayToDict(ClassTags, nil, nil, "string")
				-- Class.Tags = Tags -- or {}
				Class.NotCreatable = Tags.NotCreatable
				Class.Service = Tags.Service
			end

			local NotScriptableFixClass = NotScriptableFixes[ClassName]

			-- ? Check 96ea8b2a755e55a78aedb55a7de7e83980e11077 commit - If a NotScriptableFix is needed that relies on another NotScriptable Property (which doesn't really make sense in the first place)

			local ClassWhitelist, ClassBlacklist = ClassesWhitelist[ClassName], ClassesBlacklist[ClassName]

			for _, Member in API_Class.Members do
				-- ? print(game:GetService("ReflectionService"):GetPropertyNames("TextBox"))
				if Member.MemberType == "Property" then
					local Serialization = Member.Serialization

					if Serialization.CanLoad then -- If Roblox doesn't save it why should we; If Roblox doesn't load it we don't need to save it
						--[[
							-- ! CanSave replaces "Tags.Deprecated" check because there are some old properties which are deprecated yet have CanSave.
							Example: Humanoid.Health is CanSave false due to Humanoid.Health_XML being CanSave true (obsolete properties basically) - in this case both of them will Load. (aka PropertyPatches)
							CanSave being on same level as CanLoad also fixes potential issues with overlapping properties like Color, Color3 & Color3uint8 of BasePart, out of which only Color3uint8 should save
							This also fixes everything in IgnoreClassProperties automatically without need to hardcode :)
							A very simple fix for many problems that saveinstance scripts encounter!
						--]]
						local PropertyName = Member.Name
						if
							(Serialization.CanSave or ClassWhitelist and ClassWhitelist[PropertyName])
							and not (ClassBlacklist and ClassBlacklist[PropertyName])
						then
							local MemberTags = Member.Tags

							local ValueType = Member.ValueType
							local ValueType_Name = ValueType.Name

							if 645 <= CLIENT_VERSION and ValueType_Name == "Content" then -- TODO: Remove after Roblox adds a descriptor for it
								continue
							end

							local Special, PreferredDescriptorName

							if MemberTags then
								for _, tag in MemberTags do
									if type(tag) == "table" then
										PreferredDescriptorName = tag.PreferredDescriptorName
										if PreferredDescriptorName and Special then
											break
										end
									elseif tag == "NotScriptable" then
										Special = true
										if PreferredDescriptorName then
											break
										end
									end
								end
							end

							-- if not Special then
							local Property = {
								Name = PropertyName,
								Category = ValueType.Category,
								-- Default = Member.Default,
								-- Tags = MemberTags,
								ValueType = ValueType_Name,

								Special = Special,

								CanRead = nil,
							}

							if string.sub(ValueType_Name, 1, 8) == "Optional" then
								-- Extract the string after "Optional"
								Property.Optional = string.sub(ValueType_Name, 9)
							end

							if NotScriptableFixClass then
								local NotScriptableFix = NotScriptableFixClass[PropertyName]
								if NotScriptableFix then
									Property.Fallback = type(NotScriptableFix) == "function" and NotScriptableFix
										or PreferredDescriptorName and function(instance)
											local o, r = pcall(index, instance, PreferredDescriptorName)
											if o then
												return r
											end
											return instance[NotScriptableFix]
										end
										or function(instance)
											return instance[NotScriptableFix]
										end
								end
							elseif PreferredDescriptorName then
								Property.Fallback = function(instance)
									return instance[PreferredDescriptorName]
								end
							end
							ClassProperties[ClassProperties_size] = Property
							ClassProperties_size += 1

							-- end
						end
					end
				end
			end

			classList[ClassName] = Class
		end

		-- classList.Instance.Properties.Parent = nil -- ? Not sure if this is a better option than filtering through properties to remove this

		return classList
	end

	local ok, result = pcall(FetchAPI)
	if ok then
		ClassList = result
	else
		warn("Failed to load the API Dump")
		warn(result)
		return
	end
end

local GLOBAL_ENV = getgenv and getgenv() or _G or shared

--[=[
    @class SynSaveInstance
    Represents the options for saving instances with custom settings using the synsaveinstance function.
]=]

--- @interface CustomOptions table
--- * Structure of the main CustomOptions table.
--- * Note: Options are case-insensitive, meaning you could type `NilInstances` option as `nilInStaNces` and it would still be valid.
--- @within SynSaveInstance
--- @field __DEBUG_MODE boolean -- This will print debug logs to console about unusual scenarios. Recommended to enable if you wish to help us improve our products and find bugs / issues with it! ___Default:___ false
--- @field ReadMe boolean --___Default:___ true
--- @field SafeMode boolean -- Kicks you before Saving, which prevents you from being detected in any game. ___Default:___ false
--- @field ShutdownWhenDone boolean -- Shuts the game down after saveinstance is finished. ___Default:___ false
--- @field AntiIdle boolean -- Prevents the 20-minute-Idle Kick. ___Default:___ true
--- .Anonymous {boolean|table{UserId = string, Name = string}} -- * **RISKY:** Cleans the file of any info related to your account like: Name, UserId. This is useful for some games that might store that info in GUIs or other Instances. Might potentially mess up parts of strings that contain characters that match your Name or parts of numbers that match your UserId. Can also be a table with UserId & Name keys. ___Default:___ false
--- @field ShowStatus boolean -- ___Default:___ true
--- @field Callback function -- If set, the serialized data will be sent to the callback function instead of to file. ___Default:___ false
--- @field mode string -- Valid modes: full, optimized, scripts. Change this to invalid mode like "invalid" if you only want ExtraInstances. "optimized" mode is **NOT** supported with *@Object* option. ___Default:___ `"optimized"`
--- @field noscripts boolean -- ___Aliases:___ `Decompile`. ___Default:___ false
--- @field scriptcache boolean -- ___Default:___ true
--- @field decomptype string -- * Deprecated. ___Default:___ Uses your executor's decompiler, if available.
--- @field timeout number -- If the decompilation run time exceeds this value it gets cancelled. Set to -1 to disable timeout (unreliable). ***Aliases***: `DecompileTimeout`. ___Default:___ 10
--- @field DecompileJobless boolean -- Includes already decompiled code in the output. No new scripts are decompiled. ___Default:___ false
--- @field SaveBytecode boolean -- Includes bytecode in the output. Useful if you wish to be able to decompile it yourself later. ___Default:___ false
--- .DecompileIgnore {Instance | Instance.ClassName | [Instance.ClassName] = {Instance.Name}} -- * Ignores match & it's descendants by default. To Ignore only the instance itself set the value to `= false`. Examples: "Chat", - Matches any instance with "Chat" ClassName, Players = {"MyPlayerName"} - Matches "Players" Class AND "MyPlayerName" Name ONLY, `workspace` - matches Instance by reference, `[workspace] = false` - matches Instance by reference and only ignores the instance itself and not it's descendants. ___Default:___ {TextChatService}
--- .IgnoreList {Instance | Instance.ClassName | [Instance.ClassName] = {Instance.Name}} -- Structure is similar to **@DecompileIgnore** except `= false` meaning if you ignore one instance it will automatically ignore it's descendants. ___Default:___ {CoreGui, CorePackages}
--- .ExtraInstances {Instance} -- If used with any invalid mode (like "invalidmode") it will only save these instances. ___Default:___ {}
--- @field IgnoreProperties table -- Ignores properties by Name. ___Default:___ {}
--- @field SaveCacheInterval number -- The less the value the more often it saves, but that would mean less performance due to constantly saving. ___Default:___ 0x1600 * 10
--- @field FilePath string -- Must only contain the name of the file, no file extension. ___Default:___ false
--- @field AvoidFileOverwrite boolean -- Prevents writing to place file that already exists. ___Default:___ true
--- @field Object Instance -- * If provided, saves as .rbxmx (Model file) instead. If Object is game, it will be saved as a .rbxl file. **MUST BE AN INSTANCE REFERENCE, FOR EXAMPLE - *game.Workspace***. `"optimized"` mode is **NOT** supported with this option. If IsModel is set to false then Object specified here will be saved as a place file. ___Default:___ false
--- @field IsModel boolean -- If Object is specified then sets to true automatically, unless you set it to false. ___Default:___ false
--- @field NilInstances boolean -- Save instances that aren't Parented (Parented to nil). ___Default:___ false
--- .NilInstancesFixes {[Instance.ClassName] = function} -- * This can cause some Classes to be fixed even though they might not need the fix (better be safe than sorry though). For example, Bones inherit from Attachment if we dont define them in the NilInstancesFixes then this will catch them anyways. **TO AVOID THIS BEHAVIOR USE THIS EXAMPLE:** {ClassName_That_Doesnt_Need_Fix = false}. ___Default:___ {Animator = function, AdPortal = function, BaseWrap = function, Attachment = function}
--- @field IgnoreDefaultProperties boolean -- Ignores default properties during saving.  ___Default:___ true
--- @field IgnoreNotArchivable boolean -- Ignores the Archivable property and saves Non-Archivable instances. ___Default:___ true
--- @field IgnorePropertiesOfNotScriptsOnScriptsMode boolean -- Ignores property of every instance that is not a script in "scripts" mode. ___Default:___ false
--- @field IgnoreSpecialProperties boolean -- Prevents calls to `gethiddenproperty` and uses fallback methods instead. This also helps with crashes. If your file is corrupted after saving, you can try turning this on. ___Default:___ false
--- @field IsolateLocalPlayer boolean -- Saves Children of LocalPlayer as separate folder and prevents any instance of ClassName Player with .Name identical to LocalPlayer.Name from saving. ___Default:___ false
--- @field IsolateStarterPlayer boolean -- If enabled, StarterPlayer will be cleared and the saved starter player will be placed into folders. ___Default:___ false
--- @field IsolateLocalPlayerCharacter boolean -- Saves Children of LocalPlayer.Character as separate folder and prevents any instance of ClassName Player with .Name identical to LocalPlayer.Name from saving. ___Default:___ false
--- @field RemovePlayerCharacters boolean -- Ignore player characters while saving. (Enables SaveNotCreatable automatically). ___Default:___ true
--- @field SaveNotCreatable boolean -- * Includes non-serializable instances as Folder objects (Name is misleading as this is mostly a fix for certain NilInstances and isn't always related to NotCreatable). ___Default:___ false
--- .NotCreatableFixes table<Instance.ClassName> -- * {"Player"} is the same as {Player = "Folder"}; Format like {SpawnLocation = "Part"} is only to be used when SpawnLocation inherits from "Part" AND "Part" is Creatable. ___Default:___ { "", "Player", "PlayerScripts", "PlayerGui", "TouchTransmitter" }
--- @field IsolatePlayers boolean -- * This option does save players, it's just they won't show up in Studio and can only be viewed through the place file code (in text editor). More info at https://github.com/luau/UniversalSynSaveInstance/issues/2. ___Default:___ false
--- @field AlternativeWritefile boolean -- * Splits file content string into segments and writes them using appendfile. This might help with crashes when it starts writing to file. Though there is a risk of appendfile working incorrectly on some executors. ___Default:___ true
--- @field IgnoreDefaultPlayerScripts boolean -- * **RISKY: Ignores Default PlayerScripts like PlayerModule & RbxCharacterSounds. Prevents crashes on certain Executors. ___Default:___ true
--- @field IgnoreSharedStrings boolean -- * **RISKY: FIXES CRASHES (TEMPORARY, TESTED ON ROEXEC ONLY). FEEL FREE TO DISABLE THIS TO SEE IF IT WORKS FOR YOU**. ___Default:___ true
--- @field SharedStringOverwrite boolean -- * **RISKY:** if the process is not finished aka crashed then none of the affected values will be available. SharedStrings can also be used for ValueTypes that aren't `SharedString`, this behavior is not documented anywhere but makes sense (Could create issues though, due to _potential_ ValueType mix-up, only works on certain types which are all base64 encoded so far). Reason: Allows for potential smaller file size (can also be bigger in some cases). ___Default:___ false
--- @field TreatUnionsAsParts boolean -- * **RISKY:** Converts all UnionOperations to Parts. Useful if your Executor isn't able to save (read) Unions, because otherwise they will be invisible. ___Default:___ false (except Solara)

--- @interface OptionsAliases
--- @within SynSaveInstance
--- Aliases for the [SynSaveInstance.CustomOptions table]. Format: {Option -- Alias1, Alias2}
--- @field FilePath string -- FileName
--- @field IgnoreDefaultProperties string -- IgnoreDefaultProps
--- @field SaveNotCreatable string -- SaveNonCreatable
--- @field InstancesBlacklist string -- IgnoreList
--- @field IsolatePlayerGui string -- IsolateLocalPlayer
--- @field IsolatePlayers string -- SavePlayers
--- @field scriptcache string -- DecompileJobless
--- @field timeout string -- DecompileTimeout
--- @field IgnoreNotArchivable string -- IgnoreArchivable
--- @field RemovePlayerCharacters string -- INVERSE SavePlayerCharacters

--[=[
	@function saveinstance
	Saves instances with specified options. Example:
	```lua
	local Params = {
		RepoURL = "https://raw.githubusercontent.com/luau/SynSaveInstance/main/",
		SSI = "saveinstance",
	}

	local synsaveinstance = loadstring(game:HttpGet(Params.RepoURL .. Params.SSI .. ".luau", true), Params.SSI)()

	local CustomOptions = { SafeMode = true, timeout = 15, SaveBytecode = true }

	synsaveinstance(CustomOptions)
	```
	@within SynSaveInstance
	@yields
	@param Parameter_1 variant<table, table<Instance>> -- Can either be [SynSaveInstance.CustomOptions table] or a filled with instances ({Instance}), (then it will be treated as ExtraInstances with an invalid mode and IsModel will be true).
	@param Parameter_2 table -- [OPTIONAL] If present, then Parameter_2 will be assumed to be [SynSaveInstance.CustomOptions table]. And then if the Parameter_1 is an Instance, then it will be assumed to be [SynSaveInstance.CustomOptions table].Object. If Parameter_1 is a table filled with instances ({Instance}), then it will be assumed to be [SynSaveInstance.CustomOptions table].ExtraInstances and IsModel will be true). This exists for sake compatibility with `saveinstance(game, {})`
]=]

local function synsaveinstance(CustomOptions, CustomOptions2)
	if GLOBAL_ENV.USSI then
		return
	end
	GLOBAL_ENV.USSI = true
	do
		local setthreadidentity = global_container.setthreadidentity
		if setthreadidentity then
			pcall(setthreadidentity, 8) -- ? Arceus X Fix
		end
	end

	local currentstr, currentsize, totalsize, chunks = "", 0, 0, table.create(1)
	local savebuffer, savebuffer_size = {}, 1
	local header =
		'<!-- Saved by UniversalSynSaveInstance (Join to Copy Games) https://discord.gg/wx4ThpAsmw --><roblox version="4">'

	local StatusText

	local OPTIONS = {
		usekonstantdecompiler = false,
		mode = "optimized",
		noscripts = false,
		scriptcache = true,
		-- decomptype = "",
		timeout = 10,
		-- * New:
		__DEBUG_MODE = false,

		-- Binary = false, -- true in syn newer versions (false in our case because no binary support yet), Description: Saves everything in Binary Mode (rbxl/rbxm).
		Callback = false,
		--Clipboard/CopyToClipboard = false, -- Description: If set to true, the serialized data will be set to the clipboard, which can be later pasted into studio easily. Useful for saving models. (Binary Only)
		-- MaxThreads = 3 -- Description: The number of decompilation threads that can run at once. More threads means it can decompile for scripts at a time.
		-- DisableCompression = false, --Description: Disables compression in the binary output

		DecompileJobless = false,
		DecompileIgnore = { -- * Clean these up (merged Old Syn and New Syn)
			-- "Chat",
			"TextChatService",
			ModuleScript = nil,
		},
		IgnoreDefaultPlayerScripts = true,
		SaveBytecode = false,

		IgnoreProperties = {},

		IgnoreList = { "CoreGui", "CorePackages" },

		ExtraInstances = {},
		NilInstances = false,
		NilInstancesFixes = {},

		SaveCacheInterval = 0x1600 * 10,
		ShowStatus = true,
		SafeMode = false,
		ShutdownWhenDone = false,
		AntiIdle = true,
		Anonymous = false,
		ReadMe = true,
		FilePath = false,
		AvoidFileOverwrite = true,
		Object = false,
		IsModel = false,

		IgnoreDefaultProperties = true,
		IgnoreNotArchivable = true,
		IgnorePropertiesOfNotScriptsOnScriptsMode = false,
		IgnoreSpecialProperties = false,

		IsolateLocalPlayer = false, --  #service.StarterGui:GetChildren() == 0
		IsolateLocalPlayerCharacter = false,
		IsolatePlayers = false,
		IsolateStarterPlayer = false,
		RemovePlayerCharacters = true,

		SaveNotCreatable = false,
		NotCreatableFixes = {
			-- "InputObject",
			-- "LodDataEntity",
			-- "Path",
			"", -- * FilteredSelection
			"AdvancedDragger",
			"AnimationTrack",
			"Dragger",
			"Player",
			"PlayerGui",
			"PlayerMouse",
			"PlayerMouse",
			"PlayerScripts",
			"ScreenshotHud",
			"StudioData",
			"TextChatMessage",
			"TextSource",
			"TouchTransmitter",
			"Translator",
			CloudLocalizationTable = "LocalizationTable",
			Platform = "Part",
			Status = "Model", -- gets created by studio automatically usually so there will be duplicates due to this
			-- CoreScript = "Script", -- useless
			-- ChatWindowMessageProperties = "TextChatMessageProperties", -- ? Not needed as this can be derived with ChatWindowConfiguration.DeriveNewMessageProperties
		},

		-- ! Risky

		IgnoreSharedStrings = EXECUTOR_NAME ~= "Wave",
		SharedStringOverwrite = false,
		TreatUnionsAsParts = EXECUTOR_NAME == "Solara", -- TODO Temporary true (once removed, remove Note from docs too)
		AlternativeWritefile = not ArrayToDict({ "WRD", "Xeno", "Zorara" })[EXECUTOR_NAME],

		OptionsAliases = { -- You can't really modify these as a user
			DecompileTimeout = "timeout",
			FileName = "FilePath",
			IgnoreArchivable = "IgnoreNotArchivable",
			IgnoreDefaultProps = "IgnoreDefaultProperties",
			InstancesBlacklist = "IgnoreList",
			IsolatePlayerGui = "IsolateLocalPlayer",
			SaveNonCreatable = "SaveNotCreatable",
			SavePlayers = "IsolatePlayers",
		},
	}

	local OPTIONS_lowercase, CustomOptions_valid = {}, {}
	for option_name in OPTIONS do
		local option_name_lowercase = string.lower(option_name)
		if OPTIONS_lowercase[option_name_lowercase] then
			warn("DUPLICATE OPTION", option_name)
		else
			OPTIONS_lowercase[option_name_lowercase] = option_name
		end
	end
	for option_alias, option_name in OPTIONS.OptionsAliases do
		local option_name_lowercase = string.lower(option_alias)
		if OPTIONS_lowercase[option_name_lowercase] then
			warn("DUPLICATE ALIAS", option_alias)
		else
			OPTIONS_lowercase[option_name_lowercase] = option_name
		end
	end

	do -- * Load Settings
		local function construct_NilinstanceFix(Name, ClassName, Separate)
			return function(instance, instancePropertyOverrides)
				local Exists

				if not Separate then
					Exists = OPTIONS.NilInstancesFixes[Name]
				end

				local Fix

				local DoesntExist = not Exists
				if DoesntExist then
					Fix = Instance.new(ClassName)
					if not Separate then
						OPTIONS.NilInstancesFixes[Name] = Fix
					end
					-- Fix.Name = Name

					instancePropertyOverrides[Fix] =
						{ __SaveSpecific = true, __Children = { instance }, Properties = { Name = Name } }
				else
					Fix = Exists
					table.insert(instancePropertyOverrides[Fix].__Children, instance)
				end

				-- InstancesOverrides[instance].Parent = AnimationController
				if DoesntExist then
					return Fix
				end
			end
		end

		-- TODO: Merge BaseWrap & Attachment & AdPortal fix (put all under MeshPart container)
		-- TODO?:
		-- DebuggerWatch DebuggerWatch must be a child of ScriptDebugger
		-- PluginAction Parent of PluginAction must be Plugin or PluginMenu that created it!
		OPTIONS.NilInstancesFixes.Animator = construct_NilinstanceFix(
			"Animator has to be placed under Humanoid or AnimationController",
			"AnimationController"
		)
		OPTIONS.NilInstancesFixes.AdPortal = construct_NilinstanceFix("AdPortal must be parented to a Part", "Part")
		OPTIONS.NilInstancesFixes.Attachment =
			construct_NilinstanceFix("Attachments must be parented to a BasePart or another Attachment", "Part") -- * Bones inherit from Attachments
		OPTIONS.NilInstancesFixes.BaseWrap =
			construct_NilinstanceFix("BaseWrap must be parented to a MeshPart", "MeshPart")
		OPTIONS.NilInstancesFixes.PackageLink =
			construct_NilinstanceFix("Package already has a PackageLink", "Folder", true)

		if CustomOptions2 and type(CustomOptions2) == "table" then
			local tmp = CustomOptions
			local Type = typeof(tmp)
			CustomOptions = CustomOptions2
			if Type == "Instance" then
				CustomOptions.Object = tmp
			elseif Type == "table" and typeof(tmp[1]) == "Instance" then
				CustomOptions.ExtraInstances = tmp
				OPTIONS.IsModel = true
			end
		end

		local Type = typeof(CustomOptions)

		if Type == "table" then
			if typeof(CustomOptions[1]) == "Instance" then
				OPTIONS.mode = "invalidmode"
				OPTIONS.ExtraInstances = CustomOptions
				OPTIONS.IsModel = true
				CustomOptions = {}
			else
				for key, value in CustomOptions do
					local option = OPTIONS_lowercase[string.lower(key)]

					if option then
						OPTIONS[option] = value
						CustomOptions_valid[option] = true
					end
				end
				local Decompile = CustomOptions.Decompile
				if Decompile ~= nil then
					OPTIONS.noscripts = not Decompile
				end
				local SavePlayerCharacters = CustomOptions.SavePlayerCharacters
				if SavePlayerCharacters ~= nil then
					OPTIONS.RemovePlayerCharacters = not SavePlayerCharacters
				end
				local RemovePlayers = CustomOptions.RemovePlayers
				if RemovePlayers ~= nil then
					OPTIONS.IsolatePlayers = not RemovePlayers
				end
			end
		elseif Type == "Instance" then
			OPTIONS.mode = "invalidmode"
			OPTIONS.Object = CustomOptions
			CustomOptions = {}
		else
			CustomOptions = {}
		end
	end

	if not writefile and not OPTIONS.Callback then
		-- appendfile could be used a fallback but what kind of exec has appendfile without writefile
		local function coreCall(method, ...)
			local StarterGui = service.StarterGui
			method = StarterGui[method]
			if not method then
				return
			end

			for _ = 1, 10 do -- maxtries
				local success, result = pcall(method, StarterGui, ...)
				if success then
					return result
				end
				task.wait(1)
			end
		end

		local text = 'Function "writefile" is NOT available\nUse the Option "Callback" instead for now (check docs)'

		coreCall("SetCore", "SendNotification", {
			Title = "SAVEINSTANCE ERROR",
			Text = text,
			Duration = 15,
			Icon = "rbxassetid://9072920609",
		})
		coreCall("SetCore", "SendNotification", {
			Title = "SAVEINSTANCE ERROR",
			Text = "Please ask your executor's developers to add writefile",
			Duration = 15,
			Icon = "rbxassetid://9072920609",
		})

		warn(text)

		GLOBAL_ENV.USSI = nil
		return
	end

	if OPTIONS.IgnoreDefaultPlayerScripts then
		-- TODO This is a bad workaround, find a better automatic way
		-- TODO Look into https://robloxapi.github.io/ref/class/LuaSourceContainer.html#member-isPlayerScript
		local DecompileIgnore = OPTIONS.DecompileIgnore

		local default_scripts = ArrayToDict({
			ModuleScript = { "PlayerModule" },
			LocalScript = {
				"BubbleChat",
				"ChatScript",
				"PlayerScriptsLoader",
				"RbxCharacterSounds",
			},
		}, true)

		local function ignorePath(path)
			if path then
				for _, child in path:GetChildren() do
					local class_match = default_scripts[child.ClassName]
					if class_match then
						local name_match = class_match[child.Name]
						if name_match then
							table.insert(DecompileIgnore, child)
						end
					end
				end
			end
		end

		ignorePath(service.StarterPlayer:FindFirstChildOfClass("StarterPlayerScripts"))

		local LocalPlayer = service.Players.LocalPlayer
		if LocalPlayer then
			ignorePath(LocalPlayer:FindFirstChildOfClass("PlayerScripts"))
		end
	end

	local InstancesOverrides = {}

	local DecompileIgnore, IgnoreList, IgnoreProperties, NotCreatableFixes =
		ArrayToDict(OPTIONS.DecompileIgnore, true),
	ArrayToDict(OPTIONS.IgnoreList, true),
	ArrayToDict(OPTIONS.IgnoreProperties),
	ArrayToDict(OPTIONS.NotCreatableFixes, true, "Folder")

	local __DEBUG_MODE = OPTIONS.__DEBUG_MODE

	if __DEBUG_MODE and type(__DEBUG_MODE) ~= "function" then
		__DEBUG_MODE = warn
	end

	local FilePath = OPTIONS.FilePath
	local SaveCacheInterval = OPTIONS.SaveCacheInterval
	local ToSaveInstance = OPTIONS.Object
	local IsModel = OPTIONS.IsModel

	if ToSaveInstance and CustomOptions.IsModel == nil then
		IsModel = true
	end

	local IgnoreDefaultProperties = OPTIONS.IgnoreDefaultProperties
	local IgnoreNotArchivable = not OPTIONS.IgnoreNotArchivable
	local IgnorePropertiesOfNotScriptsOnScriptsMode = OPTIONS.IgnorePropertiesOfNotScriptsOnScriptsMode

	local old_gethiddenproperty
	if OPTIONS.IgnoreSpecialProperties and gethiddenproperty then
		old_gethiddenproperty = gethiddenproperty
		gethiddenproperty = nil
	end

	local SaveNotCreatable = OPTIONS.SaveNotCreatable
	local TreatUnionsAsParts = OPTIONS.TreatUnionsAsParts

	local DecompileJobless = OPTIONS.DecompileJobless
	if DecompileJobless then
		OPTIONS.scriptcache = true
	end
	local ScriptCache = OPTIONS.scriptcache and getscriptbytecode

	local Timeout = OPTIONS.timeout

	local IgnoreSharedStrings = OPTIONS.IgnoreSharedStrings
	local SharedStringOverwrite = OPTIONS.SharedStringOverwrite

	local ldeccache = GLOBAL_ENV.scriptcache

	local DecompileIgnoring, ToSaveList, ldecompile, placename, elapse_t, SaveNotCreatableWillBeEnabled, RecoveredScripts

	if OPTIONS.ReadMe then
		RecoveredScripts = {}
	end

	if ScriptCache and not ldeccache then
		ldeccache = {}
		GLOBAL_ENV.scriptcache = ldeccache
	end

	if ToSaveInstance == game then
		OPTIONS.mode = "full"
		ToSaveInstance = nil
		IsModel = nil
	end

	local function isLuaSourceContainer(instance)
		return instance:IsA("LuaSourceContainer")
	end

	do
		local mode = string.lower(OPTIONS.mode)
		local tmp = table.clone(OPTIONS.ExtraInstances)

		local PlaceName = game.PlaceId

		pcall(function()
			PlaceName ..= " " .. service.MarketplaceService:GetProductInfo(PlaceName).Name .. "_" .. os.date("%m_%d_%Y_%I_%M%p"):lower()
		end)

		local function sanitizeFileName(str)
			return string.sub(string.gsub(string.gsub(string.gsub(str, "[^%w _]", ""), " +", " "), " +$", ""), 1, 240)
		end

		if ToSaveInstance then
			if mode == "optimized" then -- ! NOT supported with Model file mode
				mode = "full"
			end

			for _, key in
				{
					"IsolateLocalPlayer",
					"IsolateLocalPlayerCharacter",
					"IsolatePlayers",
					"IsolateStarterPlayer",
					"NilInstances",
				}
			do
				if CustomOptions_valid[key] == nil then
					OPTIONS[key] = false
				end
			end
		end

		local filetype = IsModel and ".rbxmx" or ".rbxlx"

		if FilePath then
			placename = FilePath
		elseif IsModel then
			placename =
				sanitizeFileName("model " .. PlaceName .. " " .. (ToSaveInstance or tmp[1] or game):GetFullName())
		else
			placename = sanitizeFileName("place " .. PlaceName)
		end

		if OPTIONS.AvoidFileOverwrite and isfile then
			local counter = 0
			local temp = placename

			while isfile(temp .. filetype) do
				counter += 1
				temp = placename .. "(" .. counter .. ")"
			end

			placename = temp .. filetype
		else
			placename = placename .. filetype
		end

		if GLOBAL_ENV[placename] then
			-- warn("UniversalSynSaveInstance is already saving to this file")
			return
		end

		GLOBAL_ENV[placename] = true
		GLOBAL_ENV.USSI = nil

		if mode ~= "scripts" then
			IgnorePropertiesOfNotScriptsOnScriptsMode = nil
		end

		local TempRoot = ToSaveInstance or game

		if mode == "full" then
			if not ToSaveInstance then
				local Children = TempRoot:GetChildren()
				if 0 < #Children then
					local tmp_dict = ArrayToDict(tmp)
					for _, child in Children do
						if not tmp_dict[child] then
							table.insert(tmp, child)
						end
					end
				end
			end
		elseif mode == "optimized" then -- ! Incompatible with .rbxmx (Model file) mode
			-- if IsolatePlayers then
			-- 	table.insert(_list_0, "Players")
			-- end
			local tmp_dict = ArrayToDict(tmp)

			for _, serviceName in
				{
					"Workspace",
					"Players",
					"Lighting",
					"MaterialService",
					"ReplicatedFirst",
					"ReplicatedStorage",

					"ServerScriptService", -- LoadStringEnabled property (doesn't replicate); Just in case
					"ServerStorage", -- Just in case

					"StarterGui",
					"StarterPack",
					"StarterPlayer",
					"Teams",
					"SoundService",
					"Chat",
					"TextChatService",

					"LocalizationService", -- For LocalizationTables
					-- "InsertService",
					"JointsService",

					-- "TestService",
					-- "VoiceChatService",
				}
			do
				local _service = game:FindService(serviceName)
				if _service and not tmp_dict[_service] then
					table.insert(tmp, _service)
				end
			end
		elseif mode == "scripts" then
			-- TODO: Only save paths that lead to scripts (nothing else)
			-- Currently saves paths along with children of each tree
			local unique = {}
			for _, instance in TempRoot:GetDescendants() do
				if isLuaSourceContainer(instance) then
					local Parent = instance.Parent
					while Parent and Parent ~= TempRoot do
						instance = instance.Parent
						Parent = instance.Parent
					end
					if Parent then
						unique[instance] = true
					end
				end
			end
			for instance in unique do
				table.insert(tmp, instance)
			end
		end

		ToSaveList = tmp

		if ToSaveInstance then
			table.insert(ToSaveList, 1, ToSaveInstance)
		end
	end

	local IsolateLocalPlayer = OPTIONS.IsolateLocalPlayer
	local IsolateLocalPlayerCharacter = OPTIONS.IsolateLocalPlayerCharacter
	local IsolatePlayers = OPTIONS.IsolatePlayers
	local IsolateStarterPlayer = OPTIONS.IsolateStarterPlayer
	local NilInstances = OPTIONS.NilInstances

	if NilInstances and enablenilinstances then -- ? Solara fix
		enablenilinstances()
	end
	local function get_size_format()
		local Size

		-- local totalsize = #totalstr

		for i, unit in
			{
				"B",
				"KB",
				"MB",
				"GB",
				"TB",
			}
		do
			if totalsize < 0x400 ^ i then
				Size = math.floor(totalsize / (0x400 ^ (i - 1)) * 10) / 10 .. " " .. unit
				break
			end
		end

		return Size
	end

	local RunService = service.RunService
	local function wait_for_render()
		RunService.RenderStepped:Wait()
	end

	local Loading
	local function run_with_loading(text, keepStatus, waitForRender, taskFunction, ...)
		local previousStatus

		if StatusText then
			if keepStatus then
				previousStatus = StatusText.Text
			end
			Loading = task.spawn(function()
				local spinner_count = 0
				local chars = { "|", "/", "—", "\\" }
				local chars_size = #chars

				local function getLoadingText()
					spinner_count += 1

					if chars_size < spinner_count then
						spinner_count = 1
					end

					return chars[spinner_count]
				end

				text ..= " "

				while true do
					StatusText.Text = text .. getLoadingText()
					task.wait(0.25)
				end
			end)
			if waitForRender then
				wait_for_render()
			end
		end

		local result = { taskFunction(...) }

		if Loading then
			task.cancel(Loading)
			Loading = nil
			if previousStatus then
				StatusText.Text = previousStatus
			end
		end

		return unpack(result)
	end

	local function construct_TimeoutHandler(timeout, f, timeout_ret)
		return timeout < 0 and function(script)
			return pcall(f, script)
		end or function(script) -- TODO Ideally use ... (vararg) instead of `script` in case this is reused for something other than `decompile` & `getscriptbytecode`
			local thread = coroutine.running()
			local timeoutThread, isCancelled

			timeoutThread = task.delay(timeout, function()
				isCancelled = true -- TODO task.cancel
				coroutine.resume(thread, nil, timeout_ret)
			end)

			task.spawn(function()
				local ok, result = pcall(f, script)

				if isCancelled then
					return
				end

				task.cancel(timeoutThread)

				while coroutine.status(thread) ~= "suspended" do
					task.wait()
				end

				coroutine.resume(thread, ok, result)
			end)

			return coroutine.yield()
		end
	end

	local getbytecode
	if getscriptbytecode then
		getbytecode = construct_TimeoutHandler(3, getscriptbytecode) -- ? Solara fix
	end

	local SaveBytecode
	if OPTIONS.SaveBytecode and getscriptbytecode then
		SaveBytecode = function(script)
			local s, bytecode = getbytecode(script)

			if s and bytecode and bytecode ~= "" then
				return "-- Bytecode (Base64):\n-- " .. base64encode(bytecode) .. "\n\n"
			end
		end
	end

	do
		local Decompiler = decompile

		if OPTIONS.noscripts then
			ldecompile = function()
				return "-- Decompiling is disabled"
			end
		elseif Decompiler then
			local decomp = construct_TimeoutHandler(Timeout, Decompiler, "Decompiler timed out")

			ldecompile = function(script)
				-- local name = scr.ClassName .. scr.Name
				local bytecode
				if ScriptCache then
					local s
					s, bytecode = getbytecode(script)
					local cached

					if s then
						if not bytecode or bytecode == "" then
							return "-- The Script is Empty"
						end
						cached = ldeccache[bytecode]
					else
						bytecode = nil
					end

					if cached then
						if __DEBUG_MODE then
							__DEBUG_MODE("Found in Cache", script:GetFullName())
						end
						return cached
					end
				else
					if DecompileJobless then
						return "-- Not found in already decompiled ScriptCache"
					end

					task.wait() -- TODO Maybe remove?
				end

				local ok, result
				if OPTIONS.usekonstantdecompiler then
					ok, result = pcall(function()
						return konstantdecompiler.decompile(bytecode)
					end)
				else
					ok, result = run_with_loading("Decompiling " .. script.Name, true, nil, decomp, script)
				end

				if not result then
					ok, result = false, "Empty Output"
				end

				local output
				if ok then
					result = string.gsub(result, "\0", "\\0") -- ? Some decompilers sadly output \0 which prevents files from opening
					output = result
				else
					output = "--[[ Failed to decompile. Reason:\n" .. (result or "") .. "\n]]"
				end

				if ScriptCache and bytecode then -- TODO there might(?) be an edgecase where it manages to decompile (built-in) even though getscriptbytecode failed, and the output won't get cached
					ldeccache[bytecode] = output -- ? Should we cache even if it timed out?
					if __DEBUG_MODE then
						__DEBUG_MODE("Cached", script:GetFullName())
					end
				end

				return output
			end
		else
			ldecompile = function()
				return "-- Your Executor does NOT have a Decompiler"
			end
		end
	end

	local function GetLocalPlayer()
		return service.Players.LocalPlayer
			or service.Players:GetPropertyChangedSignal("LocalPlayer"):Wait()
			or service.Players.LocalPlayer
	end

	local function filterLinkedSource(str)
		local o, r = pcall(service.HttpService.JSONDecode, service.HttpService, str)
		if o and r.errors then
			return
		end
		return true
	end

	local function replaceClassName(instance, InstanceName, ClassName)
		local InstanceOverride
		if InstanceName ~= ClassName then -- TODO Compare against default instance instead (TouchTransmitter is called TouchInterest by default)
			InstanceOverride = InstancesOverrides[instance]
			if not InstanceOverride then
				InstanceOverride = { Properties = { Name = "[" .. ClassName .. "] " .. InstanceName } }
				InstancesOverrides[instance] = InstanceOverride
			end
		end
		return InstanceOverride
	end

	local function filterPropVal(result, propertyName, category) -- ? raw == nil thanks to SerializedDefaultAttributes; "can't get value" - due to WriteOnly tag;  "Invalid value for enum " - "StreamingPauseMode" (old games probably) Roexec
		return result == nil
			or result == "can't get value"
			or type(result) == "string"
			and (category == "Enum" or string_find(result, "Unable to get property " .. propertyName))
	end

	local __BREAK = "__BREAK" .. service.HttpService:GenerateGUID(false)

	local function ReadProperty(instance, property, propertyName, special, category, optional)
		local raw = __BREAK

		local InstanceOverride = InstancesOverrides[instance]
		if InstanceOverride then
			local PropertiesOverride = InstanceOverride.Properties
			if PropertiesOverride then
				local PropertyOverride = PropertiesOverride[propertyName]
				if PropertyOverride ~= nil then
					return PropertyOverride
				end
			end
		end

		local CanRead = property.CanRead

		if CanRead == false then -- * Skips because we've checked this property before
			return __BREAK
		end

		if special then
			if gethiddenproperty then
				local ok, result = pcall(gethiddenproperty, instance, propertyName)

				if ok then
					raw = result
				end

				if filterPropVal(raw, propertyName, category) then
					-- * Skip next time we encounter this too perhaps (unless there's a chance for it to be readable on other instance, somehow)

					if result ~= nil or not optional then
						if __DEBUG_MODE then
							__DEBUG_MODE("Filtered", propertyName)
						end
						-- Property.Special = false
						property.CanRead = false
					end

					return __BREAK -- ? We skip it because even if we use "" it will just reset to default in most cases, unless it's a string tag for example (same as not being defined)
				end
			end
		else
			if CanRead then
				raw = instance[propertyName]
			else -- Assuming CanRead == nil (untested)
				local ok, result = pcall(index, instance, propertyName)

				if ok then
					raw = result
				elseif gethiddenproperty then -- ! Be careful with this 'and gethiddenproperty' logic
					ok, result = pcall(gethiddenproperty, instance, propertyName)

					if ok then
						raw = result

						property.Special = true
					end
				end

				property.CanRead = ok

				if not ok or filterPropVal(raw, propertyName, category) then
					return __BREAK
				end
			end
		end

		return raw
	end

	local function ReturnItem(className, instance)
		return '<Item class="' .. className .. '" referent="' .. GetRef(instance) .. '"><Properties>' -- TODO: Ideally this shouldn't return <Properties> as well as the line below to close it IF  IgnorePropertiesOfNotScriptsOnScriptsMode is Enabled OR If all properties are default (reduces file size by at least 1.4%)
	end

	local function ReturnProperty(tag, propertyName, value)
		return "<" .. tag .. ' name="' .. propertyName .. '">' .. value .. "</" .. tag .. ">"
	end

	local function ReturnValueAndTag(raw, valueType, descriptor)
		local value, tag = (descriptor or XML_Descriptors[valueType])(raw)

		return value, tag or valueType
	end

	local function InheritsFix(fixes, className, instance)
		local Fix = fixes[className]
		if Fix then
			return Fix
		elseif Fix == nil then
			for class_name, fix in fixes do
				if instance:IsA(class_name) then
					return fix
				end
			end
		end
	end

	local function GetInheritedProps(className)
		local cached = inherited_properties[className]
		if cached then
			return cached
		end

		local prop_list = {}
		local layer = ClassList[className]
		while layer do
			local layer_props = layer.Properties
			table.move(layer_props, 1, #layer_props, #prop_list + 1, prop_list)

			-- for _, prop in layer.Properties do
			-- 	prop_list[prop_count] = prop -- ? table.clone is needed for case where .Default is modified
			-- 	prop_count += 1
			-- end

			layer = ClassList[layer.Superclass]
		end
		inherited_properties[className] = prop_list
		return prop_list
	end

	local CHUNK_LIMIT = 200 * 1024 * 1024 -- string length overflow prevention
	local function save_cache(final)
		local savestr = table.concat(savebuffer)
		currentstr ..= savestr -- TODO: Causes "not enough memory" error on some exec

		-- writefile(placename, totalstr)
		-- appendfile(placename, savestr) -- * supposedly causes uneven amount of Tags (e.g. <Item> must be closed with </Item> but sometimes there's more of one than the other). While being under load, the function produces unexpected output?
		local savestr_len = #savestr
		totalsize += savestr_len
		currentsize += savestr_len

		table.clear(savebuffer)
		savebuffer_size = 1

		if CHUNK_LIMIT < currentsize or final then
			table.insert(chunks, { size = currentsize, str = currentstr })
			currentstr, currentsize = "", 0
		end

		if StatusText then
			StatusText.Text = "Saving.. Size: " .. get_size_format()
		end
		-- ? Needed for at least 1fps (status text)
		-- task.wait()
		wait_for_render()
	end

	local function save_specific(className, properties)
		local Ref = Instance.new(className) -- ! Assuming anything passed here is Creatable
		local Item = ReturnItem(Ref.ClassName, Ref)

		for propertyName, val in properties do
			local whitelisted, value, tag

			-- TODO: Improve all sort of overrides & exceptions in the code (code below is awful)
			if "Source" == propertyName then
				tag = "ProtectedString"
				value = XML_Descriptors.__PROTECTEDSTRING(val)
				whitelisted = true
			elseif "Name" == propertyName then
				whitelisted = true
				value, tag = ReturnValueAndTag(val, "string") -- * Doubt ValueType will change
			end

			if whitelisted then
				Item ..= ReturnProperty(tag, propertyName, value)
			end
		end
		Item ..= "</Properties>"
		return Item
	end

	local function save_hierarchy(hierarchy)
		for _, instance in hierarchy do
			local InstanceOverride, ClassTagOverride, ClassNameOverride

			if not InstanceOverride then
				InstanceOverride = InstancesOverrides[instance]
				if InstanceOverride then
					ClassTagOverride = InstanceOverride.__ClassName
				end
			end
			local ClassName = instance.ClassName

			local InstanceName = instance.Name
			local SkipEntirely

			if not ClassTagOverride then -- ! Assuming anything that has __ClassName comes from save_extra
				if IgnoreNotArchivable and not instance.Archivable then
					continue
				end

				SkipEntirely = IgnoreList[instance]
				if SkipEntirely then
					continue
				end

				do
					local OnIgnoredList = IgnoreList[ClassName]
					if OnIgnoredList and (OnIgnoredList == true or OnIgnoredList[InstanceName]) then
						continue
					end
				end

				if not DecompileIgnoring then
					DecompileIgnoring = DecompileIgnore[instance]

					if DecompileIgnoring == nil then
						local DecompileIgnored = DecompileIgnore[ClassName]
						if DecompileIgnored then
							DecompileIgnoring = DecompileIgnored == true or DecompileIgnored[InstanceName]
						end
					end

					if DecompileIgnoring then
						DecompileIgnoring = instance
					elseif DecompileIgnoring == false then
						DecompileIgnoring = 1 -- Ignore one instance
					end
				end

				do
					local Fix = NotCreatableFixes[ClassName]

					if Fix then
						if SaveNotCreatable then
							ClassName, InstanceOverride = Fix, replaceClassName(instance, InstanceName, ClassName)
						else
							continue -- They won't show up in Studio anyway (Enable SaveNotCreatable if you wish to bypass this)
						end
					else -- ! Assuming nothing that is a PartOperation or inherits from it is in NotCreatableFixes
						if TreatUnionsAsParts and instance:IsA("PartOperation") then
							ClassName, InstanceOverride = "Part", replaceClassName(instance, InstanceName, ClassName)
							ClassNameOverride = "BasePart" -- * Mutual Superclass for PartOperation and Part; For properties only
						elseif not ClassList[ClassName] then -- ? API Dump is outdated then
							if __DEBUG_MODE then
								__DEBUG_MODE("Class not Found", ClassName)
							end

							ClassTagOverride = ClassName -- ? To at least retain .ClassName unlike the rest of the class-specific properties
							ClassName = "Folder" -- ? replaceClassName is not needed because of the ClassTagOverride
						end
					end
				end
			end
			-- ? The reason we only save .Name (and few other props in save_specific) is because
			-- ? we can be sure this is a custom container (ex. NilInstancesFixes)
			-- ? However, in case of NotCreatableFixes, the Instance might have Tags, Attributes etc. that can potentially be saved (even though it's a Folder)
			if InstanceOverride and InstanceOverride.__SaveSpecific then
				savebuffer[savebuffer_size] = save_specific(ClassName, InstanceOverride.Properties) -- ! Assuming anything that has __SaveSpecific will have .Properties
				savebuffer_size += 1
			else
				-- local Properties =
				savebuffer[savebuffer_size] = ReturnItem(ClassTagOverride or ClassName, instance) -- TODO: Ideally this shouldn't return <Properties> as well as the line below to close it IF  IgnorePropertiesOfNotScriptsOnScriptsMode is ENABLED
				savebuffer_size += 1
				if not (IgnorePropertiesOfNotScriptsOnScriptsMode and not isLuaSourceContainer(instance)) then
					local default_instance, new_def_inst

					if IgnoreDefaultProperties then
						default_instance = default_instances[ClassName]
						if not default_instance then
							local Class = ClassList[ClassName]
							if not Class.NotCreatable then -- __api_dump_class_not_creatable__ also indicates this
								-- NotCreatableFixes are exceptions to the check above meaning if we don't keep the NotCreatableFixes updated then Instance.new below might start erroring in the future potentially; HOWEVER IsPropertyModified solves this issue and no updates are really needed as NotCreatableFixes is up-to-date as of VERSION-HERE (which is when IPM gets enabled)
								local ok, result = pcall(Instance.new, ClassName) -- ! pcall is needed for level 3 execs (for example TestService); EXCEPTION NOTED ABOVE (irrelevant)

								if ok then
									new_def_inst = result

									default_instance = {}

									default_instances[ClassName] = default_instance
								else
									Class.NotCreatable = true
									if __DEBUG_MODE then
										__DEBUG_MODE("Failed to create default Instance", ClassName, result)
									end
								end
							elseif __DEBUG_MODE then
								__DEBUG_MODE("Unable to create default Instance (NotCreatable)", ClassName)
							end
						end
					end

					for _, Property in GetInheritedProps(ClassNameOverride or ClassName) do
						local PropertyName = Property.Name

						if IgnoreProperties[PropertyName] then
							continue
						end

						local ValueType = Property.ValueType

						if IgnoreSharedStrings and ValueType == "SharedString" then -- ? More info in Options
							continue
						end

						local Special, Category, Optional = Property.Special, Property.Category, Property.Optional

						local raw = ReadProperty(instance, Property, PropertyName, Special, Category, Optional)

						if raw == __BREAK then -- ! Assuming __BREAK is always returned when there's a failure to read a property
							local GHPFFailed, Fallback = Property.GHPFFailed, Property.Fallback
							if GHPFFailed and not Fallback then
								continue
							end

							if not GHPFFailed then
								local ok, result = pcall(gethiddenproperty_fallback, instance, PropertyName) -- * This helps in reading: Vector3int16, OptionalCoordinateFrame DataTypes. It also acts as an almost entire fallback for gethiddenproperty in case it is missing
								if result == nil and not Optional then
									ok = nil
								end

								if ok then
									raw = result
								else
									GHPFFailed = true
									Property.GHPFFailed = GHPFFailed
								end
							end

							if GHPFFailed and Fallback then
								local ok, result = pcall(Fallback, instance)

								if ok then
									raw = result
								else
									Property.Fallback = nil -- Low level execs might fail due to lack of some Capabilities
									if __DEBUG_MODE then
										__DEBUG_MODE("Fix Failed", PropertyName, result)
									end
									continue
								end
							end

							if raw == __BREAK then
								continue
							end
						end

						if SharedStringOverwrite and ValueType == "BinaryString" then -- TODO: Convert this to table if more types are added
							ValueType = "SharedString"
						end

						-- Special = Property.Special -- ? Read TODO below (must be updated if it's used frequently afterwards)

						if
							default_instance
							and Property.CanRead
							and not Property.Special -- TODO: .Special is checked more than once (because it might be updated during ReadProperty)
							and not (PropertyName == "Source" and isLuaSourceContainer(instance))
						then -- ? Could be not just "Source" in the future
							if new_def_inst then
								default_instance[PropertyName] = index(new_def_inst, PropertyName)
							end
							if default_instance[PropertyName] == raw then
								continue
							end
						end

						-- Serialization start

						local tag, value
						if Category == "Class" then
							tag = "Ref"
							if raw then
								if SaveNotCreatableWillBeEnabled then
									local Fix = NotCreatableFixes[raw.ClassName]
									if
										Fix
										and (
											PropertyName == "PlayerToHideFrom"
												or ValueType ~= "Instance" and ValueType ~= Fix
										)
									then
										-- * To avoid errors
										continue
									end
								end

								value = GetRef(raw)
							else
								value = "null"
							end
						elseif Category == "Enum" then -- ! We do this order (Enums before Descriptors) specifically because Font Enum might get a Font Descriptor despite having Enum Category, unlike Font DataType which that Descriptor is meant for
							value, tag = XML_Descriptors.EnumItem(raw)
						else
							local Descriptor = XML_Descriptors[ValueType]

							if Descriptor then
								value, tag = ReturnValueAndTag(raw, ValueType, Descriptor)
							elseif "ProtectedString" == ValueType then -- TODO: Try fitting this inside Descriptors
								tag = ValueType

								if PropertyName == "Source" then
									if DecompileIgnoring then -- ? Should this really prevent extraction of the original source if present ?
										if DecompileIgnoring == 1 then
											DecompileIgnoring = nil
										end
										value = "-- Ignored"
									else
										local should_decompile = true
										local LinkedSource
										local LinkedSource_Url = instance.LinkedSource -- ! Assuming every Class that has ProtectedString Source property also has a LinkedSource property
										local hasLinkedSource = LinkedSource_Url ~= ""
										local LinkedSource_type
										if hasLinkedSource then
											local Path = instance:GetFullName()
											if RecoveredScripts then
												table.insert(RecoveredScripts, Path)
											end

											LinkedSource = string.match(LinkedSource_Url, "%w+$") -- TODO: No sure if this pattern matches all possible cases. Example is: 'rbxassetid://0&hash=cd73dd2fe5e5013137231c227da3167e'
											if LinkedSource then
												if ScriptCache then
													local cached = ldeccache[LinkedSource]

													if cached then
														value = cached
														should_decompile = nil
													end
												end
												if should_decompile then
													if DecompileJobless then
														value = "-- Not found in LinkedSource ScriptCache"
														should_decompile = nil
													end

													LinkedSource_type = string.find(LinkedSource, "%a") and "hash"
														or "id"

													local asset = LinkedSource_type .. "=" .. LinkedSource

													local ok, source = pcall(function()
														-- Credits @halffalse
														return game:HttpGet(
															"https://assetdelivery.roproxy.com/v1/asset/?" .. asset
														)
													end)

													if ok and filterLinkedSource(source) then
														if ScriptCache then
															ldeccache[LinkedSource] = source
														end

														value = source

														should_decompile = nil
													end
												end
											else --if __DEBUG_MODE then -- * We print this anyway because very important
												warn(
													"FAILED TO EXTRACT ORIGINAL SCRIPT SOURCE (OPEN A GITHUB ISSUE): ",
													instance:GetFullName(),
													LinkedSource_Url
												)
											end
										end

										if should_decompile then
											local isLocalScript = instance:IsA("LocalScript")
											if
												isLocalScript and instance.RunContext == Enum.RunContext.Server
												or not isLocalScript
												and instance:IsA("Script")
												and instance.RunContext ~= Enum.RunContext.Client
											then
												value = "-- [FilteringEnabled] Server Scripts are IMPOSSIBLE to save" -- TODO: Could be not just server scripts in the future
											else
												if OPTIONS.usekonstantdecompiler then
													value = konstantdecompiler.decompile(instance)
												else
													value = ldecompile(instance)
												end
												if SaveBytecode then
													local output = SaveBytecode(instance)
													if output then
														value = output .. value
													end
												end
											end
										end

										value = "-- Saved by UniversalSynSaveInstance (Join to Copy Games) https://discord.gg/wx4ThpAsmw\n\n"
											.. (hasLinkedSource and "-- Original Source: https://assetdelivery.roblox.com/v1/asset/?" .. (LinkedSource_type or "id") .. "=" .. (LinkedSource or LinkedSource_Url) .. "\n\n" or "")
											.. value
									end
								end
								value = XML_Descriptors.__PROTECTEDSTRING(value)
							else
								--OptionalCoordinateFrame and so on, we make it dynamic

								if Optional then
									Descriptor = XML_Descriptors[Optional]

									if Descriptor then
										if raw == nil then
											-- * It can be empty, because it's optional
											-- ? Though why even save it if it's empty considering it's optional
											continue
											-- value, tag = "", ValueType
										else
											value, tag = ReturnValueAndTag(raw, ValueType, Descriptor)
										end
									end
								end
							end
						end

						if tag then
							savebuffer[savebuffer_size] = ReturnProperty(tag, PropertyName, value)
							savebuffer_size += 1
						else --if __DEBUG_MODE then -- * We print this anyway because very important
							warn("UNSUPPORTED TYPE (OPEN A GITHUB ISSUE): ", ValueType, ClassName, PropertyName)
						end
					end
				end
				savebuffer[savebuffer_size] = "</Properties>"
				savebuffer_size += 1

				if SaveCacheInterval < savebuffer_size then
					save_cache()
				end
			end

			if SkipEntirely ~= false then -- ? We save instance without it's descendants in this case (== false)
				local Children = InstanceOverride and InstanceOverride.__Children or instance:GetChildren()

				if #Children ~= 0 then
					save_hierarchy(Children)
				end
			end

			if DecompileIgnoring and DecompileIgnoring == instance then
				DecompileIgnoring = nil
			end

			savebuffer[savebuffer_size] = "</Item>"
			savebuffer_size += 1
		end
	end

	local function save_extra(name, instanceOrTable, saveProps, customClassName, source)
		if not customClassName then
			customClassName = "Folder"
		end

		local properties = { Name = name, Source = source }
		local hierarchy

		if instanceOrTable then
			if type(instanceOrTable) == "table" then
				hierarchy = instanceOrTable
			else
				hierarchy = instanceOrTable:GetChildren()
				if saveProps then
					-- IgnoreList[instanceOrTable] = nil
					-- IgnoreNotArchivable = false

					InstancesOverrides[instanceOrTable] = {
						__ClassName = customClassName, -- ! Assuming any class that contains ProtectedString is never passed, because it expects bytecode, not normal code
						__Children = hierarchy,
						Properties = properties,
					}

					save_hierarchy({ instanceOrTable })
				end
			end
		end

		if not saveProps then
			savebuffer[savebuffer_size] = save_specific(customClassName, properties)
			savebuffer_size += 1
			if hierarchy then
				save_hierarchy(hierarchy)
			end
			savebuffer[savebuffer_size] = "</Item>"
			savebuffer_size += 1
		end
	end

	local function save_game()
		do
			if IsModel then
				--[[
			-- ? Roblox encodes the following additional attributes. These are not required. Moreover, any defined schemas are ignored, and not required for a file to be valid: xmlns:xmime="http://www.w3.org/2005/05/xmlmime" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="http://www.roblox.com/roblox.xsd"
			Also http can be converted to https but not sure if Roblox cares
			-- ? <External>null</External><External>nil</External>  - <External> is a legacy concept that is no longer used.
		]]
				header ..= '<Meta name="ExplicitAutoJoints">true</Meta>'
			end
			if writefile and not OPTIONS.Callback then
				writefile(placename, header) -- TODO This is sort of useless if writefile will be used at the end (like if AlternativeWritefile and Callback are unused)
			end
		end

		-- TODO Find a better solution for this
		SaveNotCreatableWillBeEnabled = SaveNotCreatable
			or (IsolateLocalPlayer or IsolateLocalPlayerCharacter) and IsolateLocalPlayer
			or IsolatePlayers
			or NilInstances and global_container.getnilinstances -- ! Make sure this accurately reflects everything below

		save_hierarchy(ToSaveList)

		if IsolateLocalPlayer or IsolateLocalPlayerCharacter then
			local LocalPlayer = service.Players.LocalPlayer
			if LocalPlayer then
				if IsolateLocalPlayer then
					SaveNotCreatable = true
					save_extra("LocalPlayer", LocalPlayer, true)
				end
				if IsolateLocalPlayerCharacter then
					local LocalPlayerCharacter = LocalPlayer.Character
					if LocalPlayerCharacter then
						save_extra("LocalPlayer Character", LocalPlayerCharacter, true, "Model")
					end
				end
			end
		end

		if IsolateStarterPlayer then
			-- SaveNotCreatable = true -- TODO: Enable if StarterPlayerScripts or StarterCharacterScripts stop showing up in isolated folder in Studio
			save_extra("StarterPlayer", service.StarterPlayer) -- no reason to saveprops as you can see the props on the original instance
		end

		if IsolatePlayers then
			SaveNotCreatable = true
			save_extra("Players", service.Players) -- no reason to saveprops as you can see the props on the original instance
		end

		if NilInstances and global_container.getnilinstances then
			local nil_instances, nil_instances_size = {}, 1

			local NilInstancesFixes = OPTIONS.NilInstancesFixes

			for _, instance in global_container.getnilinstances() do
				if instance == game then
					instance = nil
					-- break
				else
					local ClassName = instance.ClassName

					local Fix = InheritsFix(NilInstancesFixes, ClassName, instance)

					if Fix then
						instance = Fix(instance, InstancesOverrides)
						-- continue
					end

					local Class = ClassList[ClassName]
					if Class then
						if Class.Service then -- For CSGDictionaryService, NonReplicatedCSGDictionaryService, LogService, ProximityPromptService, TestService & more
							-- instance.Parent = game
							instance = nil
							-- continue
						end
					end
				end
				if instance then
					nil_instances[nil_instances_size] = instance
					nil_instances_size += 1
				end
			end
			SaveNotCreatable = true
			save_extra("Nil Instances", nil_instances)
		end

		if OPTIONS.ReadMe then
			save_extra(
				"README",
				nil,
				nil,
				"Script",
				"--[[\n"
					.. (#RecoveredScripts ~= 0 and "\t\tIMPORTANT: Original Source of these Scripts was Recovered: " .. service.HttpService:JSONEncode(
						RecoveredScripts
						) .. "\n" or "")
					.. [[
		Thank you for using UniversalSynSaveInstance (Join to Copy Games) https://discord.gg/wx4ThpAsmw.

		If you didn't save in Binary (rbxl) - it's recommended to save the game right away to take advantage of the binary format & to preserve values of certain properties if you used IgnoreDefaultProperties setting (as they might change in the future).
		You can do that by going to FILE -> Save to File As -> Make sure File Name ends with .rbxl -> Save

		ServerStorage, ServerScriptService and Server Scripts are IMPOSSIBLE to save because of FilteringEnabled.

		If your player cannot spawn into the game, please move the scripts in StarterPlayer somewhere else or delete them. Then run `game:GetService("Players").CharacterAutoLoads = true`.
		And use "Play Here" to start game instead of "Play" to spawn your Character where your Camera currently is.

		If the chat system does not work, please use the explorer and delete everything inside the TextChatService/Chat service(s).
		Or run `game:GetService("Chat"):ClearAllChildren() game:GetService("TextChatService"):ClearAllChildren()`

		If Union and MeshPart collisions don't work, run the script below in the Studio Command Bar:


		local C = game:GetService("CoreGui")
		local D = Enum.CollisionFidelity.Default

		for _, v in game:GetDescendants() do
			if v:IsA("TriangleMeshPart") and not v:IsDescendantOf(C) then
				v.CollisionFidelity = D
			end
		end
		print("Done")

		If you can't move the Camera, run this script in the Studio Command Bar:

		workspace.CurrentCamera.CameraType = Enum.CameraType.Fixed

		Or Destroy the Camera.

		This file was generated with the following settings:
		]]
					.. service.HttpService:JSONEncode(OPTIONS)
					.. "\n\n\t\tElapsed time: "
					.. os.clock() - elapse_t
					.. " PlaceId: "
					.. game.PlaceId
					.. " PlaceVersion: "
					.. game.PlaceVersion
					.. " Client Version: "
					.. version()
					.. " Executor: "
					.. (identify_executor and table.concat({ identify_executor() }, " ") or "Unknown")
					.. "\n]]"
			)
		end
		do
			local tmp = { "<SharedStrings>" }
			for identifier, value in SharedStrings do
				table.insert(tmp, '<SharedString md5="' .. identifier .. '">' .. value .. "</SharedString>")
			end

			if 1 < #tmp then -- TODO: This sucks so much because we try to iterate a table just to check this (check above)
				savebuffer[savebuffer_size] = table.concat(tmp)
				savebuffer_size += 1
				savebuffer[savebuffer_size] = "</SharedStrings>"
				savebuffer_size += 1
			end
		end

		savebuffer[savebuffer_size] =
			"</roblox><!-- Saved by UniversalSynSaveInstance (Join to Copy Games) https://discord.gg/wx4ThpAsmw -->"
		savebuffer_size += 1
		save_cache(true)
		do
			-- ! Assuming we only write to file once hence why we only filter once
			-- TODO This might cause issues on non-unique Usernames (ex. "Cake" if game is about cakes then everything supposedly related to your name will be replaced with "Roblox"); Certain UserIds might also affect numbers, like if your UserId is 2481848 and there is some number that goes like "1.248184818837" then that the matched part will be replaced with 1, potentially making the number incorrect.
			-- TODO So for now it's best to keep this disabled by default
			-- TODO It's also not smart to filter entire file string at the end as this might also affect decompiled scripts content, which has no way of containing any user-related information. It would be better to use gsub in string Descriptor and such
			if OPTIONS.Anonymous then
				local LocalPlayer = service.Players.LocalPlayer
				if LocalPlayer then
					local function gsubCaseInsensitive(input, search, replacement) -- * Credits to friends
						local inputLower = string.lower(input)

						search = string.lower(search)

						local lastFinish = 0
						local subStrings = {}
						local search_len = #search
						local input_len = #input
						while search_len <= input_len - lastFinish do
							local init = lastFinish + 1

							local start, finish = string.find(inputLower, search, init, true)

							if start == nil then
								break
							end

							table.insert(subStrings, string.sub(input, init, start - 1))

							lastFinish = finish
						end

						if lastFinish == 0 then
							return input
						end

						table.insert(subStrings, string.sub(input, lastFinish + 1))

						return table.concat(subStrings, replacement)
					end

					local Anonymous = type(OPTIONS.Anonymous) == "table" and OPTIONS.Anonymous
						or { UserId = "1", Name = "Roblox" }

					for _, chunk in chunks do
						chunk.str = gsubCaseInsensitive(
							string.gsub(chunk.str, LocalPlayer.UserId, Anonymous.UserId),
							LocalPlayer.Name,
							Anonymous.Name
						)
					end
				end
			end

			local Callback = OPTIONS.Callback
			local AlternativeWritefile = OPTIONS.AlternativeWritefile
			local SEGMENT_SIZE = 4145728

			if Callback then
				local t = {header}
				for i = 1, #chunks do
					t[#t+1] = chunks[i].str
				end
				local totalstr = table.concat(t)
				Callback(totalstr, chunks, totalsize)

			elseif AlternativeWritefile and appendfile then
				local totallen = math.ceil(totalsize / SEGMENT_SIZE)
				local currentlen = 1

				for c = 1, #chunks do
					local chunk = chunks[c]
					local str = chunk.str
					local size = chunk.size
					local length = math.ceil(size / SEGMENT_SIZE)

					for i = 1, length do
						local a = (i - 1) * SEGMENT_SIZE + 1
						local b = i * SEGMENT_SIZE
						local savestr = string.sub(str, a, b)

						run_with_loading(
							"Writing to File " .. math.round(currentlen / totallen * 100) .. "%",
							nil,
							true,
							appendfile,
							placename,
							savestr
						)

						currentlen = currentlen + 1
						if i ~= length then task.wait() end
					end
				end

			else
				local t = {header}
				for i = 1, #chunks do
					t[#t+1] = chunks[i].str
				end
				local totalstr = table.concat(t)

				run_with_loading(
					"Writing " .. get_size_format() .. " to File",
					nil,
					true,
					writefile,
					placename,
					totalstr
				)
			end
		end
		table.clear(SharedStrings)
	end

	local Connections
	do
		local Players = service.Players

		if IgnoreList.Model ~= true then
			Connections = {}
			local function ignoreCharacter(player)
				table.insert(
					Connections,
					player.CharacterAdded:Connect(function(character)
						IgnoreList[character] = true
					end)
				)

				local Character = player.Character
				if Character then
					IgnoreList[Character] = true
				end
			end

			if OPTIONS.RemovePlayerCharacters then
				table.insert(
					Connections,
					Players.PlayerAdded:Connect(function(player)
						ignoreCharacter(player)
					end)
				)
				for _, player in Players:GetPlayers() do
					ignoreCharacter(player)
				end
			else
				IgnoreNotArchivable = false -- TODO Bad solution (Characters are NotArchivable); Also make sure the next solution is compatible with IsolateLocalPlayerCharacter
				if IsolateLocalPlayerCharacter then
					task.spawn(function()
						ignoreCharacter(GetLocalPlayer())
					end)
				end
			end
		end
		if IsolateLocalPlayer and IgnoreList.Player ~= true then
			task.spawn(function()
				IgnoreList[GetLocalPlayer()] = true
			end)
		end
	end

	if IsolateStarterPlayer then
		IgnoreList.StarterPlayer = false
	end

	if IsolatePlayers then
		IgnoreList.Players = false
	end

	if OPTIONS.ShowStatus then
		do
			local Exists = GLOBAL_ENV._statustext
			if Exists then
				Exists:Destroy()
			end
		end

		local StatusGui = Instance.new("ScreenGui")

		GLOBAL_ENV._statustext = StatusGui

		StatusGui.DisplayOrder = 2e9
		pcall(function() -- ? Compatibility with level 2
			StatusGui.OnTopOfCoreBlur = true
		end)

		StatusText = Instance.new("TextLabel")

		StatusText.Text = "Saving..."

		StatusText.BackgroundTransparency = 1
		StatusText.Font = Enum.Font.Code
		StatusText.AnchorPoint = Vector2.new(1)
		StatusText.Position = UDim2.new(1)
		StatusText.Size = UDim2.new(0.3, 0, 0, 20)

		StatusText.TextColor3 = Color3.new(1, 1, 1)
		StatusText.TextScaled = true
		StatusText.TextStrokeTransparency = 0.7
		StatusText.TextXAlignment = Enum.TextXAlignment.Right
		StatusText.TextYAlignment = Enum.TextYAlignment.Top

		StatusText.Parent = StatusGui

		local function randomString()
			local length = math.random(10, 20)
			local randomarray = table.create(length)
			for i = 1, length do
				randomarray[i] = string.char(math.random(32, 126))
			end
			return table.concat(randomarray)
		end

		if global_container.gethui then
			StatusGui.Name = randomString()
			StatusGui.Parent = global_container.gethui()
		else
			if global_container.protectgui then
				StatusGui.Name = randomString()
				global_container.protectgui(StatusGui)
				StatusGui.Parent = game:GetService("CoreGui")
			else
				local RobloxGui = game:GetService("CoreGui"):FindFirstChild("RobloxGui")
				if RobloxGui then
					StatusGui.Parent = RobloxGui
				else
					StatusGui.Name = randomString()
					StatusGui.Parent = game:GetService("CoreGui")
				end
			end
		end
	end

	do
		local SafeMode = OPTIONS.SafeMode
		if SafeMode then
			task.spawn(function()
				local LocalPlayer = GetLocalPlayer()

				local PlayerScripts = LocalPlayer:FindFirstChildOfClass("PlayerScripts")
				if PlayerScripts then
					local function construct_InstanceOverride(instance)
						local children = instance:GetChildren()
						InstancesOverrides[instance] = {
							__Children = children,
						}
						for _, child in children do
							construct_InstanceOverride(child)
						end
					end
					construct_InstanceOverride(PlayerScripts)

					InstancesOverrides[LocalPlayer] = {
						__Children = LocalPlayer:GetChildren(),
						Properties = { Name = "[" .. LocalPlayer.ClassName .. "] " .. LocalPlayer.Name },
					}
				end

				LocalPlayer:Kick("\n[SAFEMODE] Saving in Progress..\nPlease do NOT leave")
				wait_for_render()
				task.delay(10, service.GuiService.ClearError, service.GuiService)
			end)

			service.RunService:Set3dRenderingEnabled(false)
		end

		local anti_idle
		if OPTIONS.AntiIdle then
			task.spawn(function()
				local Idled = GetLocalPlayer().Idled
				if getconnections then
					for _, c in getconnections(Idled) do
						if not pcall(function()
								c:Disable()
							end) then
							pcall(function()
								c:Disconnect()
							end)
						end
					end
				end
				anti_idle = Idled:Connect(function()
					service.VirtualInputManager:SendMouseWheelEvent(
						service.UserInputService:GetMouseLocation().X,
						service.UserInputService:GetMouseLocation().Y,
						true,
						game
					)
				end)
			end)
		end

		elapse_t = os.clock()

		local ok, err = xpcall(save_game, function(err)
			return debug.traceback(err)
		end)

		if SafeMode then
			service.GuiService:ClearError()
			service.RunService:Set3dRenderingEnabled(true)
		end

		if old_gethiddenproperty then
			gethiddenproperty = old_gethiddenproperty
		end

		if anti_idle then
			anti_idle:Disconnect()
		end
		if Connections then
			for _, connection in Connections do
				connection:Disconnect()
			end
		end
		GLOBAL_ENV[placename] = nil

		elapse_t = os.clock() - elapse_t
		local Log10 = math.log10(elapse_t)
		local ExtraTime = 10

		if StatusText then
			task.spawn(function()
				if ok then
					StatusText.Text = string.format("Saved! Time %.3f seconds; Size %s", elapse_t, get_size_format())
					StatusText.TextColor3 = Color3.new(0, 1)
					task.wait(Log10 * 2 + ExtraTime)
				else
					if Loading then
						task.cancel(Loading)
						Loading = nil
					end
					StatusText.Text = "Failed! Check F9 console for more info"
					StatusText.TextColor3 = Color3.new(1)
					warn("Error found while saving:")
					warn(err)
					task.wait(Log10 + ExtraTime)
				end
				StatusText:Destroy()
			end)
		end

		if OPTIONS.ShutdownWhenDone and ok then
			task.wait(Log10 * 2 + ExtraTime)
			game:Shutdown()
		end
	end
end

return synsaveinstance