local HttpService          = game:GetService("HttpService")
local Selection            = game:GetService("Selection")
local ChangeHistoryService = game:GetService("ChangeHistoryService")
local ScriptEditorService  = game:GetService("ScriptEditorService")
local TweenService         = game:GetService("TweenService")
local AssetService         = game:GetService("AssetService")
local LogService           = game:GetService("LogService")

local API = "https://sculpt.run"
local VERSION = "Sculpt v3.1"
pcall(function() HttpService.HttpEnabled = true end)

local function safeFont(name, fallback)
	local ok, f = pcall(function() return Enum.Font[name] end)
	return ok and f or fallback
end
local FONT      = safeFont("BuilderSans", Enum.Font.Gotham)
local FONT_MED  = safeFont("BuilderSansMedium", Enum.Font.GothamMedium)
local FONT_BOLD = safeFont("BuilderSansBold", Enum.Font.GothamBold)
local FONT_MONO = safeFont("RobotoMono", Enum.Font.Code)


local MODELS = {
	{ id = "claude-fable-5",            label = "Fable 5",       vendor = "anthropic", mult = 3.3 },
	{ id = "claude-opus-4-8",           label = "Opus 4.8",      vendor = "anthropic", mult = 1.7 },
	{ id = "claude-opus-4-7",           label = "Opus 4.7",      vendor = "anthropic", mult = 1.7 },
	{ id = "claude-sonnet-5",           label = "Sonnet 5",      vendor = "anthropic", mult = 0.7 },
	{ id = "claude-sonnet-4-6",         label = "Sonnet 4.6",    vendor = "anthropic", mult = 1 },
	{ id = "claude-haiku-4-5-20251001", label = "Haiku 4.5",     vendor = "anthropic", mult = 0.35 },
	{ id = "gpt-5.5",                   label = "GPT-5.5",       vendor = "openai",    mult = 1.2 },
	{ id = "gpt-5.6-sol",               label = "GPT-5.6 Sol",   vendor = "openai",    mult = 2 },
	{ id = "gpt-5.6-terra",             label = "GPT-5.6 Terra", vendor = "openai",    mult = 2 },
	{ id = "gpt-5.6-luna",              label = "GPT-5.6 Luna",  vendor = "openai",    mult = 2 },
}
local EFFORTS = { "low", "medium", "high", "xhigh", "max" }

local CREDIT_TOKENS = 100000
local EST_OUT_TOKENS = { low = 800, medium = 1600, high = 3200, xhigh = 5000, max = 8000 }

local function fmtCr(n)
	if n >= 100 then return string.format("%d", math.floor(n + 0.5)) end
	return (string.format("%.2f", n):gsub("%.?0+$", ""))
end

local QUICK_ACTIONS = {
	{ icon = "🐛", label = "Find bugs",     prompt = "Find bugs in the selected scripts and explain each one with the line it lives on." },
	{ icon = "✨", label = "Refactor this", prompt = "Refactor the selected scripts: cleaner structure, better names, same behavior." },
	{ icon = "📝", label = "Explain code",  prompt = "Explain what the selected scripts do, step by step, in plain language." },
	{ icon = "⚡", label = "Optimize",      prompt = "Optimize the selected scripts for performance and memory. Point out every hot spot you change." },
}

local SLASH_PROMPTS = {
	explain  = "Explain what the selected scripts do, plainly.",
	optimize = "Find performance problems in the selected scripts and show fixes.",
	tests    = "Write test cases for the selected code.",
}
local SLASH_HINT = "/explain · /fix · /optimize · /tests"


local function save(k, v) plugin:SetSetting("sculpt_" .. k, v) end
local function load(k) return plugin:GetSetting("sculpt_" .. k) end

local token     = load("token")   or ""
local chatId    = load("chat_id") or 0
local modelId   = load("model")   or "claude-sonnet-4-6"
local effortId  = load("effort")  or "medium"
local themeName = load("theme")   or "dark"
local thinkOn   = load("think");     if thinkOn   == nil then thinkOn   = true  end
local autoApply = load("autoapply"); if autoApply == nil then autoApply = false end
local fontScale = load("fontscale") or 1.15
local sendOnEnter = load("sendenter"); if sendOnEnter == nil then sendOnEnter = true end
local compactMode = load("compact"); if compactMode == nil then compactMode = false end

local FONT_SCALES = {
	{ label = "Small",  v = 1 },
	{ label = "Normal", v = 1.15 },
	{ label = "Large",  v = 1.3 },
	{ label = "XL",     v = 1.5 },
}

local scaledTexts = setmetatable({}, { __mode = "k" })
local function scaled(l, base)
	scaledTexts[l] = base
	l.TextSize = math.floor(base * fontScale + 0.5)
	return l
end
local function applyFontScale()
	for l, base in pairs(scaledTexts) do
		if l.Parent then l.TextSize = math.floor(base * fontScale + 0.5) end
	end
end


local CORAL    = Color3.fromRGB(255, 107, 122)
local PEACH    = Color3.fromRGB(255, 165, 116)
local VIOLET   = Color3.fromRGB(167, 139, 250)
local SKY      = Color3.fromRGB(125, 211, 252)
local LIME     = Color3.fromRGB(190, 242, 100)
local ERR      = Color3.fromRGB(248, 113, 113)
local GREEN    = Color3.fromRGB(74, 222, 128)
local WHITE    = Color3.fromRGB(255, 255, 255)
local INK      = Color3.fromRGB(10, 8, 18)
local BTN_TEXT = Color3.fromRGB(26, 5, 16)

local THEMES = {
	dark = {
		bg          = Color3.fromRGB(10, 8, 18),
		bg2         = Color3.fromRGB(16, 13, 28),
		bg3         = Color3.fromRGB(26, 23, 37),
		panel       = Color3.fromRGB(17, 15, 26),
		line        = Color3.fromRGB(30, 28, 37),
		line2       = Color3.fromRGB(45, 43, 54),
		text        = Color3.fromRGB(245, 241, 232),
		dim         = Color3.fromRGB(162, 156, 184),
		mute        = Color3.fromRGB(107, 100, 133),
		inputBg     = Color3.fromRGB(20, 18, 28),
		pillBg      = Color3.fromRGB(23, 21, 31),
		pillHover   = Color3.fromRGB(34, 31, 45),
		ghostBg     = Color3.fromRGB(23, 21, 31),
		ghostHover  = Color3.fromRGB(36, 33, 48),
		menuBg      = Color3.fromRGB(15, 12, 25),
		menuHover   = Color3.fromRGB(32, 29, 45),
		codeBg      = Color3.fromRGB(7, 6, 13),
		codeText    = Color3.fromRGB(190, 210, 250),
		chipBg      = Color3.fromRGB(14, 12, 22),
		userBubble  = Color3.fromRGB(23, 21, 31),
		thinkOnBg   = Color3.fromRGB(42, 56, 30),
		thinkOnText = LIME,
		inlineCode  = "#C4B5FD",
		annotMix    = 0.16,
		auroraAlpha = 0.93,
	},
	light = {
		bg          = Color3.fromRGB(250, 248, 244),
		bg2         = Color3.fromRGB(243, 240, 234),
		bg3         = Color3.fromRGB(235, 231, 223),
		panel       = Color3.fromRGB(255, 255, 255),
		line        = Color3.fromRGB(230, 228, 224),
		line2       = Color3.fromRGB(210, 208, 205),
		text        = Color3.fromRGB(26, 22, 37),
		dim         = Color3.fromRGB(107, 100, 133),
		mute        = Color3.fromRGB(155, 148, 176),
		inputBg     = Color3.fromRGB(255, 255, 255),
		pillBg      = Color3.fromRGB(255, 255, 255),
		pillHover   = Color3.fromRGB(241, 237, 230),
		ghostBg     = Color3.fromRGB(255, 255, 255),
		ghostHover  = Color3.fromRGB(241, 237, 230),
		menuBg      = Color3.fromRGB(255, 255, 255),
		menuHover   = Color3.fromRGB(243, 240, 234),
		codeBg      = Color3.fromRGB(24, 20, 34),
		codeText    = Color3.fromRGB(200, 214, 246),
		chipBg      = Color3.fromRGB(240, 237, 230),
		userBubble  = Color3.fromRGB(255, 243, 240),
		thinkOnBg   = Color3.fromRGB(229, 240, 196),
		thinkOnText = Color3.fromRGB(63, 98, 18),
		inlineCode  = "#6D28D9",
		annotMix    = 0.10,
		auroraAlpha = 0.97,
	},
}

local THEME = THEMES[themeName] or THEMES.dark
local themeBindings = {}

local function themed(inst, prop, key)
	inst[prop] = THEME[key]
	table.insert(themeBindings, { inst = inst, prop = prop, key = key })
	return inst
end

local function themedFn(inst, prop, fn)
	inst[prop] = fn(THEME)
	table.insert(themeBindings, { inst = inst, prop = prop, fn = fn })
	return inst
end

local function applyTheme(name)
	themeName = name
	THEME = THEMES[name] or THEMES.dark
	local live = {}
	for _, b in ipairs(themeBindings) do
		if b.inst.Parent then
			pcall(function()
				b.inst[b.prop] = if b.fn then b.fn(THEME) else THEME[b.key]
			end)
			table.insert(live, b)
		end
	end
	themeBindings = live
end

local function applyColor(inst, prop, c)
	if type(c) == "string" then themed(inst, prop, c) else inst[prop] = c end
end


local function corner(i, r)
	local c = Instance.new("UICorner")
	c.CornerRadius = UDim.new(0, r or 8)
	c.Parent = i
	return c
end

local function stroke(i, col, t, tr)
	local s = Instance.new("UIStroke")
	applyColor(s, "Color", col)
	s.Thickness = t or 1
	s.Transparency = tr or 0
	s.Parent = i
	return s
end

local function pad(i, l, r, t, b)
	local p = Instance.new("UIPadding")
	p.PaddingLeft = UDim.new(0, l); p.PaddingRight = UDim.new(0, r or l)
	p.PaddingTop = UDim.new(0, t or l); p.PaddingBottom = UDim.new(0, b or t or l)
	p.Parent = i
end

local function frame(parent, sz, pos, bg)
	local f = Instance.new("Frame")
	f.Size = sz; f.Position = pos or UDim2.new(0, 0, 0, 0)
	f.BorderSizePixel = 0
	if bg then applyColor(f, "BackgroundColor3", bg) else f.BackgroundTransparency = 1 end
	f.Parent = parent
	return f
end

local function text(parent, str, size, col, sz, pos, font, align)
	local l = Instance.new("TextLabel")
	l.Text = str
	scaled(l, size)
	applyColor(l, "TextColor3", col or "text")
	l.BackgroundTransparency = 1; l.Font = font or FONT
	l.TextXAlignment = align or Enum.TextXAlignment.Left
	l.TextYAlignment = Enum.TextYAlignment.Top
	l.TextWrapped = true
	l.Size = sz or UDim2.new(1, 0, 0, math.floor(size * fontScale + 0.5) + 4); l.Position = pos or UDim2.new(0, 0, 0, 0)
	l.Parent = parent
	return l
end

local function gradient(inst, c1, c2, rot)
	local g = Instance.new("UIGradient")
	g.Color = ColorSequence.new(c1, c2)
	g.Rotation = rot or 135
	g.Parent = inst
	return g
end

local function hoverable(btn, normalKey, hoverKey)
	btn.AutoButtonColor = false
	themed(btn, "BackgroundColor3", normalKey)
	btn.MouseEnter:Connect(function() btn.BackgroundColor3 = THEME[hoverKey] end)
	btn.MouseLeave:Connect(function() btn.BackgroundColor3 = THEME[normalKey] end)
end

local function primaryBtn(parent, str, sz, pos)
	local b = Instance.new("TextButton")
	b.Text = str; b.TextSize = 14; b.TextColor3 = BTN_TEXT
	b.BackgroundColor3 = WHITE; b.BorderSizePixel = 0
	b.Font = FONT_BOLD; b.AutoButtonColor = false
	b.Size = sz; b.Position = pos or UDim2.new(0, 0, 0, 0)
	b.Parent = parent
	corner(b, math.floor(sz.Y.Offset / 2))
	gradient(b, CORAL, PEACH, 135)
	b.MouseEnter:Connect(function() b.BackgroundColor3 = Color3.fromRGB(232, 232, 232) end)
	b.MouseLeave:Connect(function() b.BackgroundColor3 = WHITE end)
	return b
end

local function ghostBtn(parent, str, sz, pos)
	local b = Instance.new("TextButton")
	b.Text = str; b.TextSize = 12
	themed(b, "TextColor3", "text")
	b.BorderSizePixel = 0
	b.Font = FONT_MED
	b.Size = sz; b.Position = pos or UDim2.new(0, 0, 0, 0)
	b.Parent = parent
	corner(b, math.floor(sz.Y.Offset / 2))
	stroke(b, "line2", 1)
	hoverable(b, "ghostBg", "ghostHover")
	return b
end

local logoMarks = {}

local function brandMark(parent, size, pos)
	local m = frame(parent, UDim2.fromOffset(size, size), pos, WHITE)
	corner(m, math.floor(size * 0.27))
	local g = Instance.new("UIGradient")
	g.Color = ColorSequence.new({
		ColorSequenceKeypoint.new(0, CORAL),
		ColorSequenceKeypoint.new(0.5, PEACH),
		ColorSequenceKeypoint.new(1, VIOLET),
	})
	g.Rotation = 135
	g.Parent = m
	table.insert(logoMarks, m)
	return m
end

local function textButton(parent, str, sz, pos, bg, col)
	local b = Instance.new("TextButton")
	b.Text = str; b.TextSize = 13; b.TextColor3 = col or WHITE
	b.BackgroundColor3 = bg or VIOLET; b.BorderSizePixel = 0
	b.Font = FONT_MED; b.AutoButtonColor = true
	b.Size = sz; b.Position = pos or UDim2.new(0, 0, 0, 0)
	b.Parent = parent
	corner(b, 8)
	return b
end


local B64 = {}
do
	local chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"
	for i = 1, 64 do B64[chars:byte(i)] = i - 1 end
end

local function b64ToBuffer(s, expectedLen)
	local buf = buffer.create(expectedLen)
	local acc, bits, n = 0, 0, 0
	for i = 1, #s do
		local v = B64[s:byte(i)]
		if v then
			acc = acc * 64 + v
			bits += 6
			if bits >= 8 then
				bits -= 8
				if n >= expectedLen then return nil end
				buffer.writeu8(buf, n, math.floor(acc / 2 ^ bits))
				acc %= 2 ^ bits
				n += 1
			end
		end
	end
	if n ~= expectedLen then return nil end
	return buf
end


local showPair

local function request(method, path_, body)
	local headers = { ["Content-Type"] = "application/json" }
	if token ~= "" then headers["Authorization"] = "Bearer " .. token end
	local ok, res = pcall(function()
		return HttpService:RequestAsync({ Url = API .. path_, Method = method, Headers = headers,
			Body = body and HttpService:JSONEncode(body) or nil })
	end)
	if not ok then
		local m = tostring(res)
		if m:find("Http requests") or m:find("HttpEnabled") then
			m = "HTTP off. Game Settings → Security → Allow HTTP Requests"
		end
		return nil, m
	end
	local data
	if res.Body and res.Body ~= "" then
		local ok2, d = pcall(function() return HttpService:JSONDecode(res.Body) end)
		if ok2 then data = d end
	end
	if not res.Success then
		if res.StatusCode == 401 and token ~= "" then
			token = ""; save("token", "")
			task.defer(function() if showPair then showPair() end end)
			return nil, "Signed out — pair again"
		end
		return nil, (data and data.error) or ("Error " .. res.StatusCode)
	end
	if not data then return {} end
	return data
end


local function isProtected(inst)
	local c = inst
	while c do
		if c.Name == "CorePackages" or c.ClassName == "CoreGui" then return true end
		c = c.Parent
	end
	return false
end

local function getSource(scr)
	if isProtected(scr) then return nil end
	local ok, s = pcall(function() return ScriptEditorService:GetEditorSource(scr) end)
	if ok and s then return s end
	return scr.Source
end

local function setSource(scr, newSrc)
	if isProtected(scr) then return false, "protected" end
	local ok, err = pcall(function()
		ScriptEditorService:UpdateSourceAsync(scr, function() return newSrc end)
	end)
	if not ok then
		if not pcall(function() scr.Source = newSrc end) then return false, tostring(err) end
	end
	return true
end

local function diffStats(a, b)
	local al = {}
	for l in (a .. "\n"):gmatch("(.-)\n") do al[l] = (al[l] or 0) + 1 end
	local nA, nB = 0, 0
	for _ in (a .. "\n"):gmatch("(.-)\n") do nA += 1 end
	local kept = 0
	for l in (b .. "\n"):gmatch("(.-)\n") do
		nB += 1
		if al[l] and al[l] > 0 then al[l] -= 1; kept += 1 end
	end
	return math.max(0, nB - kept), math.max(0, nA - kept)
end

local StudioService = game:GetService("StudioService")
local function activeEditorScript()
	local ok, scr = pcall(function() return StudioService.ActiveScript end)
	if ok and scr and scr:IsA("LuaSourceContainer") and not isProtected(scr) then return scr end
	return nil
end

local function collectContext()
	local sel = Selection:Get()
	local parts, targets = {}, {}
	for _, inst in ipairs(sel) do
		if inst:IsA("LuaSourceContainer") then
			local src = getSource(inst)
			if src then
				table.insert(parts, ("<script name=\"%s\" class=\"%s\" path=\"%s\">\n%s\n</script>")
					:format(inst.Name, inst.ClassName, inst:GetFullName(), src))
				table.insert(targets, inst)
			end
		end
	end
	if #parts == 0 then
		local scr = activeEditorScript()
		if scr then
			local src = getSource(scr)
			if src then
				return ("OPEN SCRIPT (active editor tab):\n<script name=\"%s\" class=\"%s\" path=\"%s\">\n%s\n</script>")
					:format(scr.Name, scr.ClassName, scr:GetFullName(), src), { scr }
			end
		end
		return nil, {}
	end
	return "SELECTED SCRIPTS:\n" .. table.concat(parts, "\n\n"), targets
end

local function collectOutputErrors()
	local ok, hist = pcall(function() return LogService:GetLogHistory() end)
	if not ok or type(hist) ~= "table" then return nil end
	local lines = {}
	for i = #hist, 1, -1 do
		local e = hist[i]
		if e.messageType == Enum.MessageType.MessageError or e.messageType == Enum.MessageType.MessageWarning then
			local tag = e.messageType == Enum.MessageType.MessageError and "[ERROR] " or "[WARN] "
			table.insert(lines, 1, tag .. tostring(e.message))
			if #lines >= 8 then break end
		end
	end
	if #lines == 0 then return nil end
	return table.concat(lines, "\n")
end

local function extractCode(str)
	local blocks = {}
	for _, code in str:gmatch("```(%w*)%s*\n(.-)```") do
		code = code:match("^(.-)%s*$")
		local entry = { code = code }
		local firstLine, rest = code:match("^(.-)\n(.*)$")
		firstLine = firstLine or code
		local scriptName = firstLine:match("^%-%-%s*script:%s*(.+)%s*$")
		local newName, newClass, newParent = firstLine:match("^%-%-%s*new:%s*(.-)%s*|%s*(.-)%s*|%s*(.+)%s*$")
		if scriptName then
			entry.target = scriptName
			entry.code = rest or ""
		elseif newName then
			entry.newName = newName
			entry.newClass = newClass
			entry.newParent = newParent
			entry.code = rest or ""
		end
		table.insert(blocks, entry)
	end
	return blocks
end

local function resolveParent(path_)
	local node = game
	for seg in path_:gmatch("[^%.]+") do
		if seg ~= "game" then
			local nxt = node:FindFirstChild(seg)
			if not nxt and node == game then
				local ok, svc = pcall(function() return game:GetService(seg) end)
				if ok then nxt = svc end
			end
			if not nxt then return nil end
			node = nxt
		end
	end
	return node
end

local VALID_SCRIPT_CLASSES = { Script = true, LocalScript = true, ModuleScript = true }


local toolbar = plugin:CreateToolbar("Sculpt")
local toggleBtn = toolbar:CreateButton("SculptToggle", "Open Sculpt", "", "Sculpt")
toggleBtn.ClickableWhenViewportHidden = true

local widget = plugin:CreateDockWidgetPluginGui("SculptPanel",
	DockWidgetPluginGuiInfo.new(Enum.InitialDockState.Right, false, false, 380, 620, 320, 460))
widget.Title = "Sculpt"

toggleBtn.Click:Connect(function()
	widget.Enabled = not widget.Enabled
	toggleBtn:SetActive(widget.Enabled)
end)
plugin.Unloading:Connect(function() widget.Enabled = false end)

local root = frame(widget, UDim2.new(1, 0, 1, 0), nil, "bg")
root.ClipsDescendants = true

local function blob(px, py, size, col)
	local function ring(sz, extra)
		local r = frame(root, UDim2.fromOffset(sz, sz), UDim2.new(px, -sz // 2, py, -sz // 2), col)
		r.ZIndex = 0
		themedFn(r, "BackgroundTransparency", function(t)
			return math.min(0.985, t.auroraAlpha + extra)
		end)
		corner(r, sz // 2)
	end
	ring(size, 0)
	ring(size + 60, 0.035)
	ring(size + 120, 0.07)
end
blob(0, 0, 240, CORAL)
blob(1, 0.25, 280, VIOLET)
blob(0.35, 1, 220, SKY)

local pairScreen = frame(root, UDim2.new(1, 0, 1, 0))
local chatScreen = frame(root, UDim2.new(1, 0, 1, 0))
chatScreen.Visible = false

local overlay = frame(root, UDim2.new(1, 0, 1, 0))
overlay.ZIndex = 50
overlay.Visible = false

showPair = function() pairScreen.Visible = true; chatScreen.Visible = false end
local function utf8Trunc(s, maxChars)
	local ok, res = pcall(function()
		local n = utf8.len(s)
		if not n or n <= maxChars then return s end
		return s:sub(1, utf8.offset(s, maxChars + 1) - 1) .. "…"
	end)
	return ok and res or s:sub(1, maxChars)
end

local function showChat() pairScreen.Visible = false; chatScreen.Visible = true end

do
	pad(pairScreen, 26, 26, 44, 26)
	brandMark(pairScreen, 24, UDim2.new(0, 0, 0, 2))
	text(pairScreen, "Sculpt", 21, "text", UDim2.new(1, -34, 0, 28), UDim2.new(0, 34, 0, 0), FONT_BOLD)
	text(pairScreen, "AI copilot for Roblox Studio", 14, "dim", UDim2.new(1, 0, 0, 20), UDim2.new(0, 0, 0, 42))

	text(pairScreen, "🔗 Pair with your account", 16, "text", UDim2.new(1, 0, 0, 22), UDim2.new(0, 0, 0, 84), FONT_BOLD)
	text(pairScreen, "1. Open localhost:3000/dashboard\n2. Click \"Get pair code\"\n3. Paste code below", 13.5, "dim", UDim2.new(1, 0, 0, 70), UDim2.new(0, 0, 0, 112))
	text(pairScreen, "⚠ Enable HTTP: Game Settings → Security", 12, PEACH, UDim2.new(1, 0, 0, 20), UDim2.new(0, 0, 0, 186))

	local codeBox = Instance.new("TextBox")
	codeBox.PlaceholderText = "000000"; codeBox.Text = ""
	codeBox.TextSize = 28
	themed(codeBox, "TextColor3", "text")
	themed(codeBox, "PlaceholderColor3", "mute")
	themed(codeBox, "BackgroundColor3", "bg3")
	codeBox.BorderSizePixel = 0
	codeBox.Font = FONT_BOLD; codeBox.ClearTextOnFocus = false
	codeBox.TextXAlignment = Enum.TextXAlignment.Center
	codeBox.Size = UDim2.new(1, 0, 0, 54); codeBox.Position = UDim2.new(0, 0, 0, 218)
	corner(codeBox, 16); stroke(codeBox, "line2", 1); codeBox.Parent = pairScreen

	local status = text(pairScreen, "", 13, "dim", UDim2.new(1, 0, 0, 36), UDim2.new(0, 0, 0, 282))
	local connectBtn = primaryBtn(pairScreen, "✨ Connect", UDim2.new(1, 0, 0, 46), UDim2.new(0, 0, 0, 322))

	local foot = text(pairScreen, VERSION, 11, "mute", UDim2.new(1, 0, 0, 16), UDim2.new(0, 0, 1, -20), FONT_MONO, Enum.TextXAlignment.Center)
	foot.TextYAlignment = Enum.TextYAlignment.Center

	connectBtn.MouseButton1Click:Connect(function()
		local code = codeBox.Text:match("^%s*(.-)%s*$")
		if #code ~= 6 or not code:match("^%d+$") then
			status.Text = "Enter 6-digit code"; status.TextColor3 = ERR; return
		end
		connectBtn.Text = "Connecting…"; status.Text = ""
		task.spawn(function()
			local data, err = request("POST", "/api/plugin/pair", { code = code })
			if not data or not data.token then
				status.Text = err or "Pair failed"; status.TextColor3 = ERR
				connectBtn.Text = "✨ Connect"; return
			end
			token = data.token; save("token", token); chatId = 0; save("chat_id", 0)
			status.Text = "✓ Connected @" .. (data.username or "?"); status.TextColor3 = LIME
			connectBtn.Text = "✨ Connect"
			task.wait(0.5); showChat()
			if refreshMe then refreshMe() end
		end)
	end)
end


local scroll, inputBox, sendBtn, sendGrad, runsLabel
local modelBtn, effortBtn, thinkBtn, ctxLabel, quickRow
local loadChat
local refreshQuickActions
local adoptServerModels
local doSend
local refreshChips
local refreshMe
local pendingImages = {}
local active = nil
local msgCount = 0
local welcomeShown = false
local TOP_H, COMP_H = 40, 154

do
	local top = frame(chatScreen, UDim2.new(1, 0, 0, TOP_H), UDim2.new(0, 0, 0, 0), "bg2")
	stroke(top, "line", 1, 0.75)
	brandMark(top, 18, UDim2.new(0, 12, 0.5, -9))
	local brandTxt = text(top, "Sculpt", 15, "text", UDim2.new(0, 70, 1, 0), UDim2.new(0, 38, 0, 0), FONT_BOLD)
	brandTxt.TextYAlignment = Enum.TextYAlignment.Center
	runsLabel = text(top, "— cr", 11, "dim", UDim2.new(0, 70, 1, 0), UDim2.new(1, -230, 0, 0), FONT_MONO, Enum.TextXAlignment.Right)
	runsLabel.TextYAlignment = Enum.TextYAlignment.Center
	local themeBtn = ghostBtn(top, themeName == "dark" and "🌙" or "☀️", UDim2.new(0, 30, 0, 30), UDim2.new(1, -154, 0.5, -15))
	themeBtn.TextSize = 13
	local histBtn = ghostBtn(top, "🕘", UDim2.new(0, 30, 0, 30), UDim2.new(1, -120, 0.5, -15))
	histBtn.TextSize = 13
	local newBtn = ghostBtn(top, "+ New", UDim2.new(0, 48, 0, 28), UDim2.new(1, -86, 0.5, -14))
	newBtn.TextSize = 11
	local gearBtn = ghostBtn(top, "⚙", UDim2.new(0, 30, 0, 30), UDim2.new(1, -34, 0.5, -15))
	gearBtn.TextSize = 14

	themeBtn.MouseButton1Click:Connect(function()
		local nxt = themeName == "dark" and "light" or "dark"
		applyTheme(nxt)
		save("theme", nxt)
		themeBtn.Text = nxt == "dark" and "🌙" or "☀️"
	end)

	local logFrame = frame(chatScreen, UDim2.new(1, 0, 1, -TOP_H - COMP_H), UDim2.new(0, 0, 0, TOP_H))
	logFrame.ClipsDescendants = true
	scroll = Instance.new("ScrollingFrame")
	scroll.Size = UDim2.new(1, 0, 1, 0); scroll.BackgroundTransparency = 1; scroll.BorderSizePixel = 0
	scroll.ScrollBarThickness = 4
	themed(scroll, "ScrollBarImageColor3", "line")
	scroll.CanvasSize = UDim2.new(0, 0, 0, 0); scroll.AutomaticCanvasSize = Enum.AutomaticSize.Y
	scroll.ScrollingDirection = Enum.ScrollingDirection.Y; scroll.Parent = logFrame
	local msgLayout = Instance.new("UIListLayout"); msgLayout.Padding = UDim.new(0, 16)
	msgLayout.SortOrder = Enum.SortOrder.LayoutOrder; msgLayout.Parent = scroll
	pad(scroll, 12, 12, 12, 12)

	quickRow = frame(logFrame, UDim2.new(1, -24, 0, 150), UDim2.new(0, 12, 1, -166))
	quickRow.ZIndex = 2
	local qGrid = Instance.new("UIGridLayout")
	qGrid.CellSize = UDim2.new(0.5, -5, 0, 32)
	qGrid.CellPadding = UDim2.new(0, 10, 0, 8)
	qGrid.SortOrder = Enum.SortOrder.LayoutOrder
	qGrid.Parent = quickRow
	for i, qa in ipairs(QUICK_ACTIONS) do
		local chip = Instance.new("TextButton")
		chip.Text = qa.icon .. " " .. qa.label
		chip.TextSize = 12
		themed(chip, "TextColor3", "text")
		chip.BorderSizePixel = 0
		chip.Font = FONT_MED
		chip.LayoutOrder = i
		chip.ZIndex = 2
		chip.Parent = quickRow
		corner(chip, 16); stroke(chip, "line2", 1)
		hoverable(chip, "pillBg", "pillHover")
		chip.MouseButton1Click:Connect(function()
			inputBox.Text = qa.prompt
			inputBox:CaptureFocus()
		end)
	end

	refreshQuickActions = function()
		quickRow.Visible = msgCount == 0 or (welcomeShown and msgCount == 1)
	end

	local comp = frame(chatScreen, UDim2.new(1, 0, 0, COMP_H), UDim2.new(0, 0, 1, -COMP_H), "bg2")
	stroke(comp, "line", 1, 0.75)

	local inputWrap = frame(comp, UDim2.new(1, -24, 0, 52), UDim2.new(0, 12, 0, 12), "inputBg")
	corner(inputWrap, 14)
	local inS = stroke(inputWrap, "line2", 1)
	pad(inputWrap, 12, 12, 8, 8)
	inputBox = Instance.new("TextBox")
	inputBox.PlaceholderText = "Ask Sculpt — select scripts for context, image URL = reference"; inputBox.Text = ""
	scaled(inputBox, 14)
	themed(inputBox, "TextColor3", "text")
	themed(inputBox, "PlaceholderColor3", "mute")
	inputBox.BackgroundTransparency = 1; inputBox.BorderSizePixel = 0
	inputBox.Font = FONT; inputBox.ClearTextOnFocus = false; inputBox.MultiLine = true
	inputBox.TextXAlignment = Enum.TextXAlignment.Left; inputBox.TextYAlignment = Enum.TextYAlignment.Top
	inputBox.TextWrapped = true; inputBox.Size = UDim2.new(1, 0, 1, 0); inputBox.Parent = inputWrap
	inputBox.Focused:Connect(function() inS.Color = VIOLET end)
	inputBox.FocusLost:Connect(function() inS.Color = THEME.line2 end)
	local UserInputService = game:GetService("UserInputService")
	inputBox:GetPropertyChangedSignal("Text"):Connect(function()
		if not sendOnEnter then return end
		local t = inputBox.Text
		if t:sub(-1) ~= "\n" then return end
		if UserInputService:IsKeyDown(Enum.KeyCode.LeftShift) or UserInputService:IsKeyDown(Enum.KeyCode.RightShift) then return end
		inputBox.Text = t:sub(1, -2)
		if doSend and not active and inputBox.Text:match("%S") then doSend() end
	end)

	local pillRow = frame(comp, UDim2.new(1, -24, 0, 26), UDim2.new(0, 12, 0, 70))
	local prl = Instance.new("UIListLayout")
	prl.FillDirection = Enum.FillDirection.Horizontal
	prl.HorizontalAlignment = Enum.HorizontalAlignment.Center
	prl.VerticalAlignment = Enum.VerticalAlignment.Center
	prl.SortOrder = Enum.SortOrder.LayoutOrder
	prl.Padding = UDim.new(0, 6)
	prl.Parent = pillRow
	local function pill(order, w, label)
		local b = Instance.new("TextButton")
		b.Text = label; b.TextSize = 11.5
		themed(b, "TextColor3", "text")
		b.BorderSizePixel = 0; b.Font = FONT_MED
		b.Size = UDim2.new(0, w, 0, 26); b.LayoutOrder = order
		b.Parent = pillRow; corner(b, 13); stroke(b, "line", 1)
		hoverable(b, "pillBg", "pillHover")
		return b
	end
	modelBtn  = pill(1, 108, "◈ Sonnet 4.6")
	effortBtn = pill(2, 78, "◐ Medium")
	thinkBtn  = pill(3, 68, "◉ Think")
	ctxLabel  = text(pillRow, "◧ no ctx", 11, "mute", UDim2.new(0, 74, 0, 26), nil, FONT_MED, Enum.TextXAlignment.Center)
	ctxLabel.TextYAlignment = Enum.TextYAlignment.Center
	ctxLabel.LayoutOrder = 4

	local function paintThink()
		if thinkOn then
			thinkBtn.BackgroundColor3 = THEME.thinkOnBg
			thinkBtn.TextColor3 = THEME.thinkOnText
		else
			thinkBtn.BackgroundColor3 = THEME.pillBg
			thinkBtn.TextColor3 = THEME.text
		end
	end
	thinkBtn.MouseEnter:Connect(paintThink)
	thinkBtn.MouseLeave:Connect(paintThink)
	themedFn(thinkBtn, "BackgroundColor3", function(t) return thinkOn and t.thinkOnBg or t.pillBg end)
	themedFn(thinkBtn, "TextColor3", function(t) return thinkOn and t.thinkOnText or t.text end)

	sendBtn = primaryBtn(comp, "✨ Send", UDim2.new(0, 130, 0, 32), UDim2.new(0.5, -65, 0, 104))
	sendGrad = sendBtn:FindFirstChildOfClass("UIGradient")
	local sendCorner = sendBtn:FindFirstChildOfClass("UICorner")
	if sendCorner then sendCorner.CornerRadius = UDim.new(0, 10) end

	local fixBtn = ghostBtn(comp, "Fix errors", UDim2.new(0, 76, 0, 26), UDim2.new(0, 12, 0, 107))
	fixBtn.TextSize = 10.5
	local attachBtn = ghostBtn(comp, "📎", UDim2.new(0, 30, 0, 26), UDim2.new(1, -42, 0, 107))
	attachBtn.TextSize = 12

	local chipsRow = frame(chatScreen, UDim2.new(1, -24, 0, 26), UDim2.new(0, 12, 1, -(COMP_H + 32)))
	chipsRow.Visible = false; chipsRow.ZIndex = 5
	local chipsL = Instance.new("UIListLayout")
	chipsL.FillDirection = Enum.FillDirection.Horizontal
	chipsL.VerticalAlignment = Enum.VerticalAlignment.Center
	chipsL.Padding = UDim.new(0, 6)
	chipsL.Parent = chipsRow

	local hintRow = frame(chatScreen, UDim2.new(1, -24, 0, 20), UDim2.new(0, 12, 1, -(COMP_H + 26)), "menuBg")
	hintRow.Visible = false; hintRow.ZIndex = 5
	corner(hintRow, 8); stroke(hintRow, "line", 1)
	local hintTxt = text(hintRow, SLASH_HINT, 10.5, "dim", UDim2.new(1, -16, 1, 0), UDim2.new(0, 8, 0, 0), FONT_MONO)
	hintTxt.TextYAlignment = Enum.TextYAlignment.Center; hintTxt.ZIndex = 6

	local function layoutFloaters()
		local y = -(COMP_H + 6)
		if chipsRow.Visible then
			y -= 26
			chipsRow.Position = UDim2.new(0, 12, 1, y)
			y -= 4
		end
		if hintRow.Visible then
			y -= 20
			hintRow.Position = UDim2.new(0, 12, 1, y)
		end
	end

	refreshChips = function()
		for _, c in ipairs(chipsRow:GetChildren()) do
			if c:IsA("Frame") then c:Destroy() end
		end
		for i, url in ipairs(pendingImages) do
			local chip = frame(chipsRow, UDim2.new(0, 120, 0, 24), nil, "chipBg")
			chip.ZIndex = 6; chip.LayoutOrder = i
			corner(chip, 12); stroke(chip, "line2", 1)
			local lbl = text(chip, "🖼 " .. url:gsub("^https?://", ""), 10.5, "dim", UDim2.new(1, -28, 1, 0), UDim2.new(0, 8, 0, 0), FONT_MED)
			lbl.TextYAlignment = Enum.TextYAlignment.Center
			lbl.TextWrapped = false; lbl.TextTruncate = Enum.TextTruncate.AtEnd
			lbl.ZIndex = 7
			local x = Instance.new("TextButton")
			x.Size = UDim2.fromOffset(18, 18); x.Position = UDim2.new(1, -22, 0.5, -9)
			x.BackgroundTransparency = 1; x.Text = "✕"; x.TextSize = 11
			themed(x, "TextColor3", "mute")
			x.Font = FONT; x.ZIndex = 7; x.Parent = chip
			x.MouseEnter:Connect(function() x.TextColor3 = ERR end)
			x.MouseLeave:Connect(function() x.TextColor3 = THEME.mute end)
			local idx = i
			x.MouseButton1Click:Connect(function()
				table.remove(pendingImages, idx)
				refreshChips()
			end)
		end
		chipsRow.Visible = #pendingImages > 0
		layoutFloaters()
	end

	local function attachPrompt()
		overlay.Visible = true
		for _, c in ipairs(overlay:GetChildren()) do c:Destroy() end
		local back = Instance.new("TextButton")
		back.Size = UDim2.new(1, 0, 1, 0); back.BackgroundColor3 = THEME.bg; back.BackgroundTransparency = 0.4
		back.Text = ""; back.ZIndex = 50; back.Parent = overlay
		back.MouseButton1Click:Connect(function() overlay.Visible = false end)

		local dlg = frame(overlay, UDim2.new(0, 280, 0, 124), UDim2.new(0.5, -140, 0.5, -62), THEME.menuBg)
		dlg.ZIndex = 55; corner(dlg, 12); stroke(dlg, THEME.line2, 1); pad(dlg, 14, 14, 12, 12)
		local t = text(dlg, "📎 Attach image (URL or asset id)", 13, THEME.text, UDim2.new(1, 0, 0, 20), nil, FONT_BOLD)
		t.ZIndex = 56
		local box = Instance.new("TextBox")
		box.Text = ""; box.TextSize = 13; box.TextColor3 = THEME.text
		box.PlaceholderText = "https://… or 123456789"; box.PlaceholderColor3 = THEME.mute
		box.BackgroundColor3 = THEME.pillBg; box.BorderSizePixel = 0
		box.Font = FONT; box.ClearTextOnFocus = false
		box.Size = UDim2.new(1, 0, 0, 30); box.Position = UDim2.new(0, 0, 0, 28)
		box.TextXAlignment = Enum.TextXAlignment.Left; box.ZIndex = 56
		corner(box, 8); stroke(box, THEME.line, 1); pad(box, 8, 8, 0, 0); box.Parent = dlg
		local okB = primaryBtn(dlg, "Add", UDim2.new(1, 0, 0, 28), UDim2.new(0, 0, 0, 68))
		okB.ZIndex = 56; okB.TextSize = 12
		okB.MouseButton1Click:Connect(function()
			local v = box.Text:match("^%s*(.-)%s*$")
			overlay.Visible = false
			if v == "" then return end
			local url = v:match("^%d+$") and ("https://assetdelivery.roblox.com/v1/asset?id=" .. v) or v
			if #pendingImages < 3 then
				table.insert(pendingImages, url)
				refreshChips()
			end
		end)
		box:CaptureFocus()
	end

	fixBtn.MouseButton1Click:Connect(function()
		if active then return end
		inputBox.Text = "/fix"
		doSend()
	end)
	attachBtn.MouseButton1Click:Connect(attachPrompt)

	inputBox:GetPropertyChangedSignal("Text"):Connect(function()
		local show = inputBox.Text == "/"
		if hintRow.Visible ~= show then
			hintRow.Visible = show
			layoutFloaters()
		end
	end)

	local ver = text(comp, VERSION, 10, "mute", UDim2.new(0, 90, 0, 16), UDim2.new(1, -100, 1, -20), FONT_MONO, Enum.TextXAlignment.Right)
	ver.TextYAlignment = Enum.TextYAlignment.Center

	local function findModel(id)
		for _, m in ipairs(MODELS) do if m.id == id then return m end end
		return nil
	end
	local function refreshModelBtn()
		local m = findModel(modelId)
		modelBtn.Text = "◈ " .. (m and m.label or modelId)
	end
	refreshModelBtn()
	effortBtn.Text = "◐ " .. effortId:sub(1, 1):upper() .. effortId:sub(2)

	local estLabel = text(comp, "≈ …", 10, "mute", UDim2.new(0, 130, 0, 16), UDim2.new(0, 12, 1, -20), FONT_MONO)
	estLabel.TextYAlignment = Enum.TextYAlignment.Center
	local ctxChars = 0
	local function refreshCtxChars()
		ctxChars = 0
		for _, inst in ipairs(Selection:Get()) do
			if inst:IsA("LuaSourceContainer") then
				local src = getSource(inst)
				if src then ctxChars += #src end
			end
		end
	end
	local function refreshEstimate()
		local m = findModel(modelId)
		local mult = (m and m.mult) or 1
		local inTok = (ctxChars + #inputBox.Text + 600) / 4
		local outTok = (EST_OUT_TOKENS[effortId] or 1600) * (thinkOn and 1.4 or 1)
		local cr = math.max(0.01, (inTok + outTok * 4) * mult / CREDIT_TOKENS)
		estLabel.Text = "≈ " .. fmtCr(cr) .. " cr"
	end
	inputBox:GetPropertyChangedSignal("Text"):Connect(refreshEstimate)
	refreshCtxChars(); refreshEstimate()

	adoptServerModels = function(list)
		if type(list) ~= "table" or #list == 0 then return end
		local out = {}
		for _, m in ipairs(list) do
			if type(m) == "table" and m.id and m.label then
				table.insert(out, {
					id = m.id, label = m.label, vendor = m.vendor or "anthropic",
					mult = tonumber(m.mult) or 1,
					available = m.available ~= false,
				})
			end
		end
		if #out == 0 then return end
		MODELS = out
		local cur = findModel(modelId)
		if not cur or cur.available == false then
			for _, m in ipairs(MODELS) do
				if m.available ~= false then modelId = m.id; save("model", modelId); break end
			end
		end
		refreshModelBtn()
		refreshEstimate()
	end

	local function openMenu(anchorBtn, items, onPick)
		overlay.Visible = true
		for _, c in ipairs(overlay:GetChildren()) do c:Destroy() end
		local back = Instance.new("TextButton")
		back.Size = UDim2.new(1, 0, 1, 0); back.BackgroundTransparency = 1; back.Text = ""
		back.ZIndex = 50; back.Parent = overlay
		back.MouseButton1Click:Connect(function() overlay.Visible = false end)

		local w = 210
		local ah = anchorBtn.AbsolutePosition
		local rp = root.AbsolutePosition
		local relX = math.clamp(ah.X - rp.X, 8, math.max(8, root.AbsoluteSize.X - w - 8))
		local relY = ah.Y - rp.Y
		local itemH = 32
		local wantH = #items * itemH + 12
		local maxH = math.min(wantH, relY - 16, 360)
		if maxH < itemH + 12 then maxH = math.min(wantH, 360) end

		local menu = Instance.new("Frame")
		menu.Size = UDim2.new(0, w, 0, maxH)
		menu.Position = UDim2.new(0, relX, 0, math.max(8, relY - maxH - 6))
		menu.BackgroundColor3 = THEME.menuBg
		menu.BorderSizePixel = 0
		menu.ZIndex = 51; menu.Parent = overlay
		corner(menu, 10); stroke(menu, THEME.line2, 1)

		local list = Instance.new("ScrollingFrame")
		list.Size = UDim2.new(1, 0, 1, 0); list.BackgroundTransparency = 1; list.BorderSizePixel = 0
		list.ScrollBarThickness = 4; list.ScrollBarImageColor3 = THEME.line2
		list.CanvasSize = UDim2.new(0, 0, 0, wantH); list.ScrollingDirection = Enum.ScrollingDirection.Y
		list.ZIndex = 51; list.Parent = menu
		pad(list, 6, 6, 6, 6)
		local ml = Instance.new("UIListLayout"); ml.Padding = UDim.new(0, 2); ml.Parent = list

		for i, it in ipairs(items) do
			local ib = Instance.new("TextButton")
			ib.Size = UDim2.new(1, 0, 0, itemH - 2); ib.BackgroundColor3 = THEME.menuHover; ib.BackgroundTransparency = 1
			ib.BorderSizePixel = 0; ib.Text = ""; ib.AutoButtonColor = false; ib.LayoutOrder = i
			ib.ZIndex = 52; ib.Parent = list; corner(ib, 6)
			if it.dotColor then
				local dot = frame(ib, UDim2.fromOffset(6, 6), UDim2.new(0, 10, 0.5, -3), it.dotColor)
				dot.ZIndex = 53; corner(dot, 3)
				if it.disabled then dot.BackgroundTransparency = 0.6 end
			end
			local rightPad = it.actions and 54 or 24
			local lbl = text(ib, it.label, 12.5, it.disabled and THEME.mute or THEME.text,
				UDim2.new(1, -(it.dotColor and 22 or 10) - rightPad, 1, 0), UDim2.new(0, it.dotColor and 22 or 10, 0, 0))
			lbl.TextYAlignment = Enum.TextYAlignment.Center; lbl.ZIndex = 53
			lbl.TextTruncate = Enum.TextTruncate.AtEnd
			if not it.disabled then
				ib.MouseEnter:Connect(function() ib.BackgroundTransparency = 0.3 end)
				ib.MouseLeave:Connect(function() ib.BackgroundTransparency = 1 end)
				ib.MouseButton1Click:Connect(function()
					overlay.Visible = false
					onPick(it.value)
				end)
			end
			if it.actions then
				local editB = Instance.new("TextButton")
				editB.Size = UDim2.fromOffset(22, 22); editB.Position = UDim2.new(1, -50, 0.5, -11)
				editB.BackgroundTransparency = 1; editB.Text = "✎"; editB.TextSize = 13
				editB.TextColor3 = THEME.mute; editB.Font = FONT; editB.ZIndex = 54; editB.Parent = ib
				editB.MouseEnter:Connect(function() editB.TextColor3 = VIOLET end)
				editB.MouseLeave:Connect(function() editB.TextColor3 = THEME.mute end)
				editB.MouseButton1Click:Connect(function()
					overlay.Visible = false
					if it.actions.rename then it.actions.rename(it.value, it.label) end
				end)
				local delB = Instance.new("TextButton")
				delB.Size = UDim2.fromOffset(22, 22); delB.Position = UDim2.new(1, -26, 0.5, -11)
				delB.BackgroundTransparency = 1; delB.Text = "✕"; delB.TextSize = 13
				delB.TextColor3 = THEME.mute; delB.Font = FONT; delB.ZIndex = 54; delB.Parent = ib
				delB.MouseEnter:Connect(function() delB.TextColor3 = ERR end)
				delB.MouseLeave:Connect(function() delB.TextColor3 = THEME.mute end)
				delB.MouseButton1Click:Connect(function()
					if it.actions.delete then it.actions.delete(it.value, delB) end
				end)
			end
		end
	end

	modelBtn.MouseButton1Click:Connect(function()
		local items = {}
		for _, m in ipairs(MODELS) do
			local unavailable = m.available == false
			table.insert(items, {
				label = m.label .. (unavailable and "  · soon" or ""),
				value = m.id,
				dotColor = m.vendor == "anthropic" and CORAL or VIOLET,
				disabled = unavailable,
			})
		end
		openMenu(modelBtn, items, function(v)
			modelId = v; save("model", v); refreshModelBtn(); refreshEstimate()
		end)
	end)

	effortBtn.MouseButton1Click:Connect(function()
		local items = {}
		for _, e in ipairs(EFFORTS) do
			table.insert(items, { label = e:sub(1, 1):upper() .. e:sub(2), value = e })
		end
		openMenu(effortBtn, items, function(v)
			effortId = v; save("effort", v)
			effortBtn.Text = "◐ " .. v:sub(1, 1):upper() .. v:sub(2)
			refreshEstimate()
		end)
	end)

	thinkBtn.MouseButton1Click:Connect(function()
		thinkOn = not thinkOn; save("think", thinkOn)
		paintThink()
		refreshEstimate()
	end)

	gearBtn.MouseButton1Click:Connect(function()
		local fsLabel = "Normal"
		for _, s in ipairs(FONT_SCALES) do if math.abs(s.v - fontScale) < 0.01 then fsLabel = s.label end end
		local items = {
			{ label = (autoApply and "✓ " or "    ") .. "⚡ Auto-apply code", value = "auto" },
			{ label = (sendOnEnter and "✓ " or "    ") .. "↵ Enter = send", value = "enter" },
			{ label = (compactMode and "✓ " or "    ") .. "▤ Compact chat", value = "compact" },
			{ label = "    🔠 Font size: " .. fsLabel, value = "font" },
			{ label = "    🗑 Clear chat history", value = "clearlocal" },
			{ label = "    🚪 Sign out", value = "signout" },
		}
		openMenu(gearBtn, items, function(v)
			if v == "auto" then
				autoApply = not autoApply; save("autoapply", autoApply)
			elseif v == "enter" then
				sendOnEnter = not sendOnEnter; save("sendenter", sendOnEnter)
			elseif v == "compact" then
				compactMode = not compactMode; save("compact", compactMode)
				if chatId and chatId ~= 0 and loadChat then loadChat(chatId) end
			elseif v == "font" then
				local idx = 1
				for i, s in ipairs(FONT_SCALES) do if math.abs(s.v - fontScale) < 0.01 then idx = i end end
				local nxt = FONT_SCALES[(idx % #FONT_SCALES) + 1]
				fontScale = nxt.v; save("fontscale", fontScale)
				applyFontScale()
			elseif v == "clearlocal" then
				for _, c in ipairs(scroll:GetChildren()) do if c:IsA("Frame") then c:Destroy() end end
				msgCount = 0; chatId = 0; save("chat_id", 0)
				refreshQuickActions()
			elseif v == "signout" then
				token = ""; save("token", ""); chatId = 0; save("chat_id", 0); showPair()
			end
		end)
	end)

	newBtn.MouseButton1Click:Connect(function()
		task.spawn(function()
			for _, c in ipairs(scroll:GetChildren()) do if c:IsA("Frame") then c:Destroy() end end
			msgCount = 0; chatId = 0; save("chat_id", 0)
			refreshQuickActions()
			local d = request("POST", "/api/plugin/new_chat", { model = modelId })
			if d and d.chat_id then chatId = d.chat_id; save("chat_id", chatId) end
		end)
	end)

	local function renamePrompt(id, oldTitle)
		overlay.Visible = true
		for _, c in ipairs(overlay:GetChildren()) do c:Destroy() end
		local back = Instance.new("TextButton")
		back.Size = UDim2.new(1, 0, 1, 0); back.BackgroundColor3 = THEME.bg; back.BackgroundTransparency = 0.4
		back.Text = ""; back.ZIndex = 50; back.Parent = overlay
		back.MouseButton1Click:Connect(function() overlay.Visible = false end)

		local dlg = frame(overlay, UDim2.new(0, 260, 0, 120), UDim2.new(0.5, -130, 0.5, -60), THEME.menuBg)
		dlg.ZIndex = 55; corner(dlg, 12); stroke(dlg, THEME.line2, 1); pad(dlg, 14, 14, 12, 12)
		local t = text(dlg, "✎ Rename chat", 13, THEME.text, UDim2.new(1, 0, 0, 20), nil, FONT_BOLD)
		t.ZIndex = 56
		local box = Instance.new("TextBox")
		box.Text = oldTitle or ""; box.TextSize = 13; box.TextColor3 = THEME.text
		box.PlaceholderText = "New title"; box.PlaceholderColor3 = THEME.mute
		box.BackgroundColor3 = THEME.pillBg; box.BorderSizePixel = 0
		box.Font = FONT; box.ClearTextOnFocus = false
		box.Size = UDim2.new(1, 0, 0, 30); box.Position = UDim2.new(0, 0, 0, 26)
		box.TextXAlignment = Enum.TextXAlignment.Left; box.ZIndex = 56
		corner(box, 8); stroke(box, THEME.line, 1); pad(box, 8, 8, 0, 0); box.Parent = dlg
		local okB = primaryBtn(dlg, "Save", UDim2.new(1, 0, 0, 28), UDim2.new(0, 0, 0, 64))
		okB.ZIndex = 56; okB.TextSize = 12
		okB.MouseButton1Click:Connect(function()
			local newT = box.Text:match("^%s*(.-)%s*$")
			overlay.Visible = false
			if newT ~= "" and newT ~= oldTitle then
				task.spawn(function() request("PATCH", "/api/plugin/chats/" .. id, { title = newT }) end)
			end
		end)
		box:CaptureFocus()
	end

	histBtn.MouseButton1Click:Connect(function()
		task.spawn(function()
			local chats = request("GET", "/api/plugin/chats")
			if not chats then return end
			local items = {}
			local armedDelete = {}
			local actions = {
				rename = renamePrompt,
				delete = function(id, btn)
					if not armedDelete[id] then
						armedDelete[id] = true
						if btn then btn.Text = "sure?"; btn.TextColor3 = ERR end
						task.delay(3, function()
							armedDelete[id] = nil
							if btn and btn.Parent then btn.Text = "✕"; btn.TextColor3 = THEME.mute end
						end)
						return
					end
					armedDelete[id] = nil
					if btn and btn.Parent then btn.Parent:Destroy() end
					task.spawn(function()
						request("DELETE", "/api/plugin/chats/" .. id)
						if chatId == id then
							for _, c in ipairs(scroll:GetChildren()) do if c:IsA("Frame") then c:Destroy() end end
							msgCount = 0; chatId = 0; save("chat_id", 0)
							refreshQuickActions()
						end
					end)
				end,
			}
			for _, c in ipairs(chats) do
				local title = utf8Trunc(c.title or "Chat", 40)
				table.insert(items, { label = title, value = c.id, dotColor = VIOLET, actions = actions })
			end
			if #items == 0 then items = { { label = "(no chats yet)", value = nil } } end
			openMenu(histBtn, items, function(v)
				if v and loadChat then loadChat(v) end
			end)
		end)
	end)

	local function refreshCtxLabel()
		refreshCtxChars(); refreshEstimate()
		local n = 0
		for _, i in ipairs(Selection:Get()) do if i:IsA("LuaSourceContainer") then n += 1 end end
		if n > 0 then
			ctxLabel.Text = "◧ " .. n .. " script" .. (n == 1 and "" or "s"); ctxLabel.TextColor3 = VIOLET
		elseif activeEditorScript() then
			ctxLabel.Text = "◧ open tab"; ctxLabel.TextColor3 = SKY
		else
			ctxLabel.Text = "◧ no ctx"; ctxLabel.TextColor3 = THEME.mute
		end
	end
	Selection.SelectionChanged:Connect(refreshCtxLabel)
	pcall(function() StudioService:GetPropertyChangedSignal("ActiveScript"):Connect(refreshCtxLabel) end)
	refreshCtxLabel()
end


local function scrollDown() scroll.CanvasPosition = Vector2.new(0, 1e6) end

local FADE_INFO = TweenInfo.new(0.15, Enum.EasingStyle.Quad, Enum.EasingDirection.Out)

local function fadeIn(bubble, accentBar)
	local targetBg = bubble.BackgroundTransparency
	bubble.BackgroundTransparency = 1
	TweenService:Create(bubble, FADE_INFO, { BackgroundTransparency = targetBg }):Play()
	if accentBar then
		local targetBar = accentBar.BackgroundTransparency
		accentBar.BackgroundTransparency = 1
		TweenService:Create(accentBar, FADE_INFO, { BackgroundTransparency = targetBar }):Play()
	end
end

local function newBubble(role)
	msgCount += 1
	refreshQuickActions()
	local wrap = Instance.new("Frame")
	wrap.BackgroundTransparency = 1; wrap.Size = UDim2.new(1, 0, 0, 0)
	wrap.AutomaticSize = Enum.AutomaticSize.Y; wrap.LayoutOrder = msgCount; wrap.Parent = scroll
	local wl = Instance.new("UIListLayout"); wl.Padding = UDim.new(0, compactMode and 2 or 4); wl.SortOrder = Enum.SortOrder.LayoutOrder; wl.Parent = wrap

	local isUser = role == "user"
	if not compactMode then
		local rl = text(wrap, isUser and "You" or "Sculpt", 11.5, isUser and CORAL or VIOLET, UDim2.new(1, 0, 0, 16), nil, FONT_BOLD)
		rl.LayoutOrder = 1
	end

	local holder = Instance.new("Frame")
	holder.BackgroundTransparency = 1; holder.BorderSizePixel = 0
	holder.Size = UDim2.new(1, 0, 0, 0); holder.AutomaticSize = Enum.AutomaticSize.Y
	holder.LayoutOrder = 2; holder.Parent = wrap

	local bar = frame(holder, UDim2.new(0, 2, 1, -6), UDim2.new(0, 0, 0, 3), isUser and CORAL or VIOLET)
	bar.BackgroundTransparency = 0.25
	corner(bar, 1)

	local bubble = Instance.new("Frame")
	themed(bubble, "BackgroundColor3", isUser and "userBubble" or "panel")
	bubble.BorderSizePixel = 0
	bubble.Size = UDim2.new(1, -8, 0, 0); bubble.Position = UDim2.new(0, 8, 0, 0)
	bubble.AutomaticSize = Enum.AutomaticSize.Y
	bubble.Parent = holder
	corner(bubble, 10); stroke(bubble, "line", 1, 0.75); pad(bubble, compactMode and 8 or 12)
	fadeIn(bubble, bar)
	return bubble
end

local ANNOT = {
	BUG        = ERR,
	RACE       = PEACH,
	WARN       = PEACH,
	PERF       = SKY,
	SUGGESTION = VIOLET,
	FIX        = LIME,
	NOTE       = Color3.fromRGB(162, 156, 184),
}

local function escapeRich(s)
	return s:gsub("&", "&amp;"):gsub("<", "&lt;"):gsub(">", "&gt;")
end

local function richify(s)
	local out = escapeRich(s)
	out = out:gsub("`([^`\n]+)`", function(m)
		return '<font family="rbxasset://fonts/families/RobotoMono.json" color="' .. THEME.inlineCode .. '"> <b>' .. m .. '</b> </font>'
	end)
	out = out:gsub("%*%*([^%*\n]+)%*%*", "<b>%1</b>")
	return out
end

local IMG_EXT = { png = true, jpg = true, jpeg = true, gif = true, webp = true }
local imageCache = {}

local function findImageUrls(str)
	local urls, seen = {}, {}
	for url in str:gmatch("https?://[%w%-%._~:/%?#%[%]@!%$&'%(%)%*%+,;=%%]+") do
		local clean = url:gsub("[%.,%);'\"]+$", "")
		local ext = clean:match("%.(%w+)$") or clean:match("%.(%w+)%?")
		local isAsset = clean:find("assetdelivery%.roblox%.com") ~= nil
		if ((ext and IMG_EXT[ext:lower()]) or isAsset) and not seen[clean] then
			seen[clean] = true
			table.insert(urls, clean)
		end
	end
	return urls
end

local function fetchEditableImage(url)
	local cached = imageCache[url]
	if cached then
		if cached.failed then return nil end
		return cached
	end
	local ok, result = pcall(function()
		local d, err = request("POST", "/api/plugin/image", { url = url, max_size = 320 })
		if not d or not d.rgba_base64 or not d.width or not d.height then
			error(err or "no image data")
		end
		local w, h = d.width, d.height
		local buf = b64ToBuffer(d.rgba_base64, w * h * 4)
		if not buf then error("bad pixel payload") end
		local editable = AssetService:CreateEditableImage({ Size = Vector2.new(w, h) })
		editable:WritePixelsBuffer(Vector2.zero, Vector2.new(w, h), buf)
		return { editable = editable, w = w, h = h }
	end)
	if ok and result then
		imageCache[url] = result
		return result
	end
	imageCache[url] = { failed = true }
	return nil
end

local function addImagePreview(bubble, url, order)
	local card = frame(bubble, UDim2.new(1, 0, 0, 40), nil, "chipBg")
	card.LayoutOrder = order
	card.ClipsDescendants = true
	corner(card, 10); stroke(card, "line", 1)
	local loading = text(card, "🖼 loading image…", 11.5, "mute", UDim2.new(1, -20, 1, 0), UDim2.new(0, 10, 0, 0), FONT)
	loading.TextYAlignment = Enum.TextYAlignment.Center
	task.spawn(function()
		local img = fetchEditableImage(url)
		if not card.Parent then return end
		if not img then
			loading.Text = "🖼 image unavailable"
			card.Size = UDim2.new(0, 160, 0, 26)
			return
		end
		local maxH = 180
		local dispH = math.min(maxH, img.h)
		local dispW = math.floor(img.w * dispH / img.h + 0.5)
		local label = Instance.new("ImageLabel")
		label.Size = UDim2.new(1, 0, 1, 0)
		label.BackgroundTransparency = 1
		label.ScaleType = Enum.ScaleType.Fit
		local okSet = pcall(function()
			label.ImageContent = Content.fromObject(img.editable)
		end)
		if okSet then
			loading:Destroy()
			card.Size = UDim2.new(0, dispW, 0, dispH)
			label.Parent = card
			corner(label, 10)
		else
			imageCache[url] = { failed = true }
			label:Destroy()
			loading.Text = "🖼 image unavailable"
			card.Size = UDim2.new(0, 160, 0, 26)
		end
	end)
end

local function renderInto(bubble, str)
	local bl = bubble:FindFirstChildOfClass("UIListLayout")
	if not bl then
		bl = Instance.new("UIListLayout"); bl.Padding = UDim.new(0, 8); bl.SortOrder = Enum.SortOrder.LayoutOrder; bl.Parent = bubble
	end
	local order = 0

	local function addAnnotCard(cat, lineNo, msg)
		order += 1
		local accent = ANNOT[cat]
		local card = Instance.new("Frame")
		card.BorderSizePixel = 0
		themedFn(card, "BackgroundColor3", function(t)
			return t.bg2:Lerp(accent, t.annotMix)
		end)
		card.Size = UDim2.new(1, 0, 0, 0)
		card.AutomaticSize = Enum.AutomaticSize.Y; card.LayoutOrder = order
		card.Parent = bubble
		corner(card, 8)
		local st = stroke(card, accent, 1); st.Transparency = 0.6
		pad(card, 10, 10, 8, 8)
		local head = cat .. (lineNo and ("  ·  LINE " .. lineNo) or "")
		text(card, "● " .. head, 10.5, accent, UDim2.new(1, 0, 0, 15), nil, FONT_MONO)
		local body = text(card, "", 13.5, "text", UDim2.new(1, 0, 0, 0), UDim2.new(0, 0, 0, 18))
		body.RichText = true
		body.Text = richify(msg)
		body.AutomaticSize = Enum.AutomaticSize.Y
	end

	local function addPlain(chunk)
		chunk = chunk:match("^%s*(.-)%s*$")
		if chunk == "" then return end
		local buf = {}
		local function flushBuf()
			if #buf == 0 then return end
			local t = table.concat(buf, "\n"):match("^%s*(.-)%s*$")
			buf = {}
			if t == "" then return end
			order += 1
			local l = text(bubble, "", 14, "text", UDim2.new(1, 0, 0, 0))
			l.RichText = true
			l.Text = richify(t)
			l.AutomaticSize = Enum.AutomaticSize.Y; l.LayoutOrder = order
		end
		for line in (chunk .. "\n"):gmatch("(.-)\n") do
			local cat, rest = line:match("^%s*[●•]%s*(%u+)%s*[—%-–:]+%s*(.+)$")
			if cat and ANNOT[cat] then
				flushBuf()
				local lineNo, msg = rest:match("^LINE%s+(%d+)%s*[:—%-–]+%s*(.+)$")
				addAnnotCard(cat, lineNo, msg or rest)
			else
				table.insert(buf, line)
			end
		end
		flushBuf()
	end

	local pos = 1
	while true do
		local s, e, _, code = str:find("```(%w*)%s*\n(.-)```", pos)
		addPlain(str:sub(pos, s and s - 1 or #str))
		if not s then break end
		order += 1
		local card = frame(bubble, UDim2.new(1, 0, 0, 0), nil, "codeBg")
		card.AutomaticSize = Enum.AutomaticSize.Y; card.LayoutOrder = order
		corner(card, 8); stroke(card, "line", 1); pad(card, 12, 12, 10, 10)
		local cl = text(card, code:match("^(.-)%s*$"), 13, "codeText", UDim2.new(1, 0, 0, 0), nil, FONT_MONO)
		cl.AutomaticSize = Enum.AutomaticSize.Y
		pos = e + 1
	end

	for _, url in ipairs(findImageUrls(str)) do
		order += 1
		addImagePreview(bubble, url, order)
	end
end

local function addFooter(bubble, modelLabel, elapsed, runs, fellBack)
	local sec = math.floor(elapsed + 0.5)
	local tstr = sec < 60 and (sec .. "s") or string.format("%dm%02ds", math.floor(sec / 60), sec % 60)
	local f = text(bubble, "◇ " .. modelLabel .. " · " .. tstr .. " · " .. fmtCr(runs) .. " cr" .. (fellBack and " · ↯ fallback" or ""),
		11, "mute", UDim2.new(1, 0, 0, 16), nil, FONT_MONO)
	f.LayoutOrder = 500
end

local function addDiff(bubble, ins, del, name)
	local chip = frame(bubble, UDim2.new(1, 0, 0, 22), nil, "chipBg")
	chip.LayoutOrder = 400; corner(chip, 6); pad(chip, 10, 10, 0, 0)
	local t = text(chip, "✎ " .. name .. "   +" .. ins .. "  -" .. del, 11, GREEN, UDim2.new(1, 0, 1, 0), nil, FONT_MONO)
	t.TextYAlignment = Enum.TextYAlignment.Center
end


local applyOrder = 0

local function openCopyModal(code)
	overlay.Visible = true
	for _, c in ipairs(overlay:GetChildren()) do c:Destroy() end
	local back = Instance.new("TextButton")
	back.Size = UDim2.new(1, 0, 1, 0); back.BackgroundColor3 = THEME.bg; back.BackgroundTransparency = 0.4
	back.Text = ""; back.ZIndex = 50; back.Parent = overlay
	back.MouseButton1Click:Connect(function() overlay.Visible = false end)

	local dlg = frame(overlay, UDim2.new(1, -48, 0, 300), UDim2.new(0, 24, 0.5, -150), THEME.menuBg)
	dlg.ZIndex = 55; corner(dlg, 12); stroke(dlg, THEME.line2, 1); pad(dlg, 14, 14, 12, 12)
	local t = text(dlg, "Select all and Ctrl+C", 13, THEME.text, UDim2.new(1, 0, 0, 20), nil, FONT_BOLD)
	t.ZIndex = 56

	local boxWrap = frame(dlg, UDim2.new(1, 0, 1, -66), UDim2.new(0, 0, 0, 26), THEME.codeBg)
	boxWrap.ZIndex = 56; corner(boxWrap, 8); stroke(boxWrap, THEME.line, 1)
	local box = Instance.new("TextBox")
	box.Text = code; box.TextSize = 12
	box.TextColor3 = THEME.codeText
	box.BackgroundTransparency = 1; box.BorderSizePixel = 0
	box.Font = FONT_MONO; box.ClearTextOnFocus = false; box.TextEditable = false
	box.MultiLine = true; box.TextWrapped = false
	box.TextXAlignment = Enum.TextXAlignment.Left; box.TextYAlignment = Enum.TextYAlignment.Top
	box.Size = UDim2.new(1, -16, 1, -12); box.Position = UDim2.new(0, 8, 0, 6)
	box.ClipsDescendants = true
	box.ZIndex = 57; box.Parent = boxWrap

	local closeB = primaryBtn(dlg, "Close", UDim2.new(0, 100, 0, 28), UDim2.new(0.5, -50, 1, -32))
	closeB.ZIndex = 56; closeB.TextSize = 12
	closeB.MouseButton1Click:Connect(function() overlay.Visible = false end)
	box:CaptureFocus()
end

local function addCopyBtn(row, code, x)
	local b = Instance.new("TextButton")
	b.Text = "⧉ Copy"; b.TextSize = 11
	themed(b, "TextColor3", "text")
	b.BorderSizePixel = 0; b.Font = FONT_MED
	b.Size = UDim2.new(0, 66, 0, 26); b.Position = UDim2.new(0, x, 0, 0)
	b.Parent = row; corner(b, 13); stroke(b, "line2", 1)
	hoverable(b, "ghostBg", "ghostHover")
	b.MouseButton1Click:Connect(function() openCopyModal(code) end)
end

local function openDiffPreview(target, code, onConfirm)
	overlay.Visible = true
	for _, c in ipairs(overlay:GetChildren()) do c:Destroy() end
	local back = Instance.new("TextButton")
	back.Size = UDim2.new(1, 0, 1, 0); back.BackgroundColor3 = THEME.bg; back.BackgroundTransparency = 0.4
	back.Text = ""; back.ZIndex = 50; back.Parent = overlay
	back.MouseButton1Click:Connect(function() overlay.Visible = false end)

	local before = getSource(target) or ""
	local ins, del = diffStats(before, code)

	local dlg = frame(overlay, UDim2.new(1, -48, 0, 340), UDim2.new(0, 24, 0.5, -170), THEME.menuBg)
	dlg.ZIndex = 55; corner(dlg, 12); stroke(dlg, THEME.line2, 1); pad(dlg, 14, 14, 12, 12)
	local t = text(dlg, "Apply to " .. target.Name .. "?", 13, THEME.text, UDim2.new(1, 0, 0, 20), nil, FONT_BOLD)
	t.ZIndex = 56
	local stat = text(dlg, "+" .. ins .. " added   -" .. del .. " removed   ·   overwrites whole script", 11, ins >= del and GREEN or PEACH, UDim2.new(1, 0, 0, 16), UDim2.new(0, 0, 0, 22), FONT_MONO)
	stat.ZIndex = 56

	local boxWrap = frame(dlg, UDim2.new(1, 0, 1, -96), UDim2.new(0, 0, 0, 44), THEME.codeBg)
	boxWrap.ZIndex = 56; corner(boxWrap, 8); stroke(boxWrap, THEME.line, 1)
	local box = Instance.new("TextBox")
	box.Text = code; box.TextSize = 12
	box.TextColor3 = THEME.codeText
	box.BackgroundTransparency = 1; box.BorderSizePixel = 0
	box.Font = FONT_MONO; box.ClearTextOnFocus = false; box.TextEditable = false
	box.MultiLine = true; box.TextWrapped = false
	box.TextXAlignment = Enum.TextXAlignment.Left; box.TextYAlignment = Enum.TextYAlignment.Top
	box.Size = UDim2.new(1, -16, 1, -12); box.Position = UDim2.new(0, 8, 0, 6)
	box.ClipsDescendants = true; box.ZIndex = 57; box.Parent = boxWrap

	local cancelB = textButton(dlg, "Cancel", UDim2.new(0, 96, 0, 30), UDim2.new(0, 0, 1, -32), THEME.ghostBg, THEME.text)
	cancelB.ZIndex = 56; cancelB.TextSize = 12; corner(cancelB, 8)
	cancelB.MouseButton1Click:Connect(function() overlay.Visible = false end)
	local applyB = primaryBtn(dlg, "⚡ Apply", UDim2.new(0, 120, 0, 30), UDim2.new(1, -120, 1, -32))
	applyB.ZIndex = 56; applyB.TextSize = 12
	applyB.MouseButton1Click:Connect(function() overlay.Visible = false; onConfirm(ins, del) end)
end

local function applyToScript(bubble, code, target)
	local function commit(btn, ins, del)
		local rec = ChangeHistoryService:TryBeginRecording("Sculpt edit " .. target.Name)
		local ok = setSource(target, code)
		if rec then
			ChangeHistoryService:FinishRecording(rec, ok and Enum.FinishRecordingOperation.Commit or Enum.FinishRecordingOperation.Cancel)
		end
		if ok then
			if not ins then ins, del = diffStats("", code) end
			addDiff(bubble, ins, del, target.Name); Selection:Set({ target })
			if btn then btn.Text = "✓ Applied"; btn.BackgroundColor3 = GREEN; btn.TextColor3 = INK end
		elseif btn then
			btn.Text = "✗ failed"; btn.BackgroundColor3 = ERR
		end
	end
	if autoApply then
		commit(nil)
	else
		applyOrder += 1
		local row = frame(bubble, UDim2.new(1, 0, 0, 28))
		row.LayoutOrder = 350 + applyOrder
		local b = textButton(row, "⚡ Review & Apply → " .. target.Name, UDim2.new(0, 220, 0, 26), UDim2.new(0, 0, 0, 0), VIOLET)
		b.TextSize = 11; corner(b, 13)
		b.MouseButton1Click:Connect(function()
			openDiffPreview(target, code, function(ins, del) commit(b, ins, del) end)
		end)
		addCopyBtn(row, code, 226)
	end
end

local function createNewScript(bubble, block)
	applyOrder += 1
	local row = frame(bubble, UDim2.new(1, 0, 0, 28))
	row.LayoutOrder = 350 + applyOrder
	local b = textButton(row, "＋ Create " .. block.newName, UDim2.new(0, 190, 0, 26), UDim2.new(0, 0, 0, 0), SKY, INK)
	b.TextSize = 11; b.Font = FONT_BOLD; corner(b, 13)
	addCopyBtn(row, block.code, 196)
	b.MouseButton1Click:Connect(function()
		b.Text = "Creating…"
		local className = VALID_SCRIPT_CLASSES[block.newClass] and block.newClass or "Script"
		local parentInst = resolveParent(block.newParent or "") or game:GetService("ServerScriptService")
		local rec = ChangeHistoryService:TryBeginRecording("Sculpt create " .. block.newName)
		local ok, err = pcall(function()
			local inst = Instance.new(className)
			inst.Name = block.newName
			inst.Source = block.code
			inst.Parent = parentInst
			Selection:Set({ inst })
		end)
		if rec then
			ChangeHistoryService:FinishRecording(rec, ok and Enum.FinishRecordingOperation.Commit or Enum.FinishRecordingOperation.Cancel)
		end
		if ok then
			b.Text = "✓ Created in " .. parentInst.Name
			b.BackgroundColor3 = GREEN
			local lines = select(2, block.code:gsub("\n", "")) + 1
			addDiff(bubble, lines, 0, block.newName)
		else
			b.Text = "✗ " .. tostring(err):sub(1, 24)
			b.BackgroundColor3 = ERR; b.TextColor3 = WHITE
		end
	end)
end

local function wireCodeOps(bubble, blocks, targets)
	local byName = {}
	for _, t in ipairs(targets) do byName[t.Name] = t end
	local unnamedIdx = 0
	for _, block in ipairs(blocks) do
		if block.newName then
			createNewScript(bubble, block)
		elseif block.target and byName[block.target] then
			applyToScript(bubble, block.code, byName[block.target])
		elseif not block.target then
			unnamedIdx += 1
			if targets[unnamedIdx] then
				applyToScript(bubble, block.code, targets[unnamedIdx])
			end
		end
	end
end


loadChat = function(id)
	task.spawn(function()
		local d = request("GET", "/api/plugin/chats/" .. id)
		if not d or not d.messages then return end
		for _, c in ipairs(scroll:GetChildren()) do if c:IsA("Frame") then c:Destroy() end end
		msgCount = 0
		chatId = id; save("chat_id", id)
		if d.chat and d.chat.model then
			for _, m in ipairs(MODELS) do
				if m.id == d.chat.model then
					modelId = m.id; save("model", modelId)
					modelBtn.Text = "◈ " .. m.label
					break
				end
			end
		end
		for _, msg in ipairs(d.messages) do
			local b = newBubble(msg.role == "user" and "user" or "assistant")
			renderInto(b, msg.content or "")
		end
		refreshQuickActions()
		task.defer(scrollDown)
	end)
end


local function modelLabelFor(id)
	id = (id or ""):gsub("%-fast$", "")
	for _, m in ipairs(MODELS) do if m.id == id then return m.label end end
	return id
end

local function fmtSec(s)
	s = math.floor(s + 0.5)
	return s < 60 and (s .. "s") or string.format("%dm%02ds", math.floor(s / 60), s % 60)
end

local function setSendIdle()
	sendBtn.Text = "✨ Send"; sendBtn.BackgroundColor3 = WHITE
	sendBtn.TextColor3 = BTN_TEXT
	if sendGrad then sendGrad.Enabled = true end
end

local function setSendBusy()
	sendBtn.Text = "⏹ Stop"; sendBtn.BackgroundColor3 = Color3.fromRGB(180, 60, 70)
	sendBtn.TextColor3 = WHITE
	if sendGrad then sendGrad.Enabled = false end
end

local function chatNote(msg)
	local ab = newBubble("assistant")
	renderInto(ab, msg)
	scrollDown()
end

doSend = function()
	if active then
		active.cancelled = true
		local jid = active.jobId
		if jid then
			task.spawn(function() request("POST", "/api/plugin/job/" .. jid .. "/cancel") end)
		end
		if active.body then
			active.body.Text = "⏹ Stopped after " .. fmtSec(os.clock() - active.t0) .. "."
			active.body.TextColor3 = THEME.mute
		end
		active = nil; setSendIdle()
		return
	end

	local str = inputBox.Text:match("^%s*(.-)%s*$")

	local cmd = str:match("^/(%w+)%s*$")
	if cmd then
		if cmd == "fix" then
			local errLines = collectOutputErrors()
			if not errLines then
				inputBox.Text = ""
				chatNote("No recent errors in Output.")
				return
			end
			str = "Fix these errors from Output:\n" .. errLines
		elseif SLASH_PROMPTS[cmd] then
			str = SLASH_PROMPTS[cmd]
		end
	end

	if #pendingImages > 0 and str ~= "" then
		str = str .. "\n\nAttached images:\n" .. table.concat(pendingImages, "\n")
	end

	if str == "" then return end

	local question = str
	local ctx, targets = collectContext()
	local fullMsg = question
	if ctx then fullMsg = ctx .. "\n\n---\n\nUSER: " .. question end

	inputBox.Text = ""
	if #pendingImages > 0 then
		pendingImages = {}
		if refreshChips then refreshChips() end
	end
	setSendBusy()

	local tag = ""
	if #targets > 0 then tag = " [" .. #targets .. " script" .. (#targets == 1 and "" or "s") .. "]" end
	local ub = newBubble("user"); renderInto(ub, str .. tag)

	local ab = newBubble("assistant")
	local body = text(ab, "◌ thinking… 0s", 14, "dim", UDim2.new(1, 0, 0, 0))
	body.AutomaticSize = Enum.AutomaticSize.Y
	scrollDown()

	local t0 = os.clock()
	active = { cancelled = false, question = question, body = body, t0 = t0, jobId = nil }
	local me = active

	task.spawn(function()
		local frames = { "◌", "◍", "◎", "●" }
		local i = 0
		while active == me and not me.cancelled do
			i += 1
			if me.body then me.body.Text = frames[(i % 4) + 1] .. " thinking… " .. fmtSec(os.clock() - t0) end
			task.wait(0.3)
		end
	end)

	task.spawn(function()
		local started, err = request("POST", "/api/plugin/chat", {
			content = fullMsg, model = modelId, chat_id = chatId ~= 0 and chatId or nil,
			effort = effortId, thinking = thinkOn,
		})
		if me.cancelled then return end
		if not started or not started.job_id then
			active = nil; setSendIdle()
			body.Text = "⚠ " .. (err or "no response"); body.TextColor3 = ERR
			if err and tostring(err):find("401") then task.wait(1); token = ""; save("token", ""); showPair() end
			return
		end
		me.jobId = started.job_id
		if started.chat_id and started.chat_id ~= chatId then chatId = started.chat_id; save("chat_id", chatId) end

		local data, jerr
		while true do
			task.wait(2)
			if me.cancelled or active ~= me then return end
			local d, e = request("GET", "/api/plugin/job/" .. started.job_id)
			if d and d.status == "running" then
			elseif d and d.status == "done" then
				data = d; break
			else
				jerr = (d and d.error) or e or "job failed"; break
			end
		end
		if me.cancelled or active ~= me then return end
		active = nil; setSendIdle()

		local elapsed = os.clock() - t0
		if not data then
			body.Text = "⚠ " .. tostring(jerr); body.TextColor3 = ERR
			return
		end
		body:Destroy()
		if data.remaining then runsLabel.Text = fmtCr(data.remaining) .. " cr" end
		renderInto(ab, data.text or "(empty)")
		addFooter(ab, modelLabelFor(data.model), elapsed, data.spent or 0, data.fell_back)
		local blocks = extractCode(data.text or "")
		if #blocks > 0 then wireCodeOps(ab, blocks, targets) end
		scrollDown()
	end)
end

sendBtn.MouseButton1Click:Connect(doSend)


refreshMe = function()
	task.spawn(function()
		local d = request("GET", "/api/plugin/me")
		if not d then return end
		if d.runs then runsLabel.Text = fmtCr(d.runs) .. " cr" end
		if d.models and adoptServerModels then adoptServerModels(d.models) end
	end)
end

task.spawn(function()
	local d = request("GET", "/api/plugin/logo")
	if not d or not d.rgba_base64 or not d.width or not d.height then return end
	local buf = b64ToBuffer(d.rgba_base64, d.width * d.height * 4)
	if not buf then return end
	local ok, editable = pcall(function()
		local e = AssetService:CreateEditableImage({ Size = Vector2.new(d.width, d.height) })
		e:WritePixelsBuffer(Vector2.zero, Vector2.new(d.width, d.height), buf)
		return e
	end)
	if not ok or not editable then return end
	for _, m in ipairs(logoMarks) do
		if m.Parent then
			pcall(function()
				local g = m:FindFirstChildOfClass("UIGradient")
				if g then g:Destroy() end
				local img = Instance.new("ImageLabel")
				img.Size = UDim2.new(1, 0, 1, 0)
				img.BackgroundTransparency = 1
				img.ScaleType = Enum.ScaleType.Crop
				img.ImageContent = Content.fromObject(editable)
				img.ZIndex = m.ZIndex + 1
				img.Parent = m
				corner(img, math.floor(math.max(m.Size.X.Offset, 12) * 0.27))
				m.BackgroundColor3 = Color3.fromRGB(10, 20, 16)
			end)
		end
	end
end)

if token ~= "" then
	showChat(); refreshMe()
	if chatId and chatId ~= 0 then
		loadChat(chatId)
	else
		welcomeShown = true
		local ab = newBubble("assistant")
		renderInto(ab, "👋 Welcome to Sculpt! Select a Script — I read it and can write changes straight in. Try `/fix` after an error, or paste an image URL as a visual reference. ✨")
	end
else
	showPair()
end
refreshQuickActions()

print("[Sculpt] v3.1 loaded — " .. (token ~= "" and "paired" or "not paired"))