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\n Preview\n

\n\n

\n \n {!started && (\n

\n Nothing built yet.\n

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any OpenRouter slug works, with an\n// optional \"@provider-tag\" suffix to pin a specific serving endpoint.\nexport const DEFAULT_MODELS = [\n \"openai/gpt-oss-120b@cerebras\",\n \"moonshotai/kimi-k3@fireworks/fast\",\n \"anthropic/claude-opus-5-fast\",\n \"openai/gpt-5.6-luna\",\n \"google/gemini-3.6-flash\",\n \"z-ai/glm-5.2\",\n \"x-ai/grok-4.5\",\n];\n\nconst SYSTEM = `You write one complete HTML document, streamed top-to-bottom into a live browser.\n- Output raw HTML only: no prose, no code fences, no explanation.\n- Start with and end with , then stop.\n- In , include exactly this stylesheet setup: \n- Style everything with Tailwind utility classes (arbitrary values like h-[40%] are fine). No \n \n \n

\n \n \n \n\n",[],[201,250],"ebe3384f-c433-45f5-bdcd-ac477f85e588","favicon.svg","01a068eb-ca37-739b-bb70-fe32b88eb1de",["D",1788466678331],"\n",[],[201,257],"738e422e-60f4-4121-9fe6-02d3664fb1e8","VoiceButton.tsx","a8ef1b14-a7d4-11f1-9f9d-1607ee4eb77e","01a068eb-ca37-739b-bb70-fbb512b8ccd8",14,["D",1788467242426],"/** @jsxImportSource https://esm.sh/react@18.2.0 */\nimport { useEffect, useRef, useState } from \"https://esm.sh/react@18.2.0\";\n\n// Hands-free voice input through the browser's speech recognizer (Chrome and Safari). Words stream in as\n// you talk. A request is sent when the recognizer marks the sentence final, or when no new words have\n// arrived for `silenceMs`, whichever comes first. Listening pauses while the agent works and resumes after.\nexport function useVoice({ silenceMs, busy, onFinal }: {\n silenceMs: number;\n busy: boolean;\n onFinal: (text: string, sinceLastWordMs: number) => void;\n}) {\n const [on, setOn] = useState(false);\n const [listening, setListening] = useState(false);\n const [interim, setInterim] = useState(\"\");\n const [status, setStatus] = useState(\"\");\n const onRef = useRef(false);\n const busyRef = useRef(busy);\n busyRef.current = busy;\n const sent = useRef(false); // true from a send until the agent finishes, so nothing is sent twice\n const rec = useRef(null);\n const timer = useRef(undefined);\n const transcript = useRef(\"\");\n const lastWordAt = useRef(0);\n const SR = typeof window === \"undefined\" ? null : (window as any).SpeechRecognition || (window as any).webkitSpeechRecognition;\n const supported = !!SR;\n\n function commit(why: string) {\n const text = transcript.current.trim();\n clearTimeout(timer.current);\n transcript.current = \"\";\n setInterim(\"\");\n if (!text || sent.current) return;\n sent.current = true;\n const since = Math.round(performance.now() - lastWordAt.current);\n setStatus(`${why}, ${since} ms after the last word`);\n try { rec.current?.abort(); } catch { /* already stopped */ }\n onFinal(text, since);\n }\n\n function start() {\n if (!SR || rec.current || busyRef.current || sent.current) return;\n const r = new SR();\n r.lang = \"en-US\";\n r.interimResults = true;\n r.continuous = true;\n r.onstart = () => { setListening(true); setStatus(\"listening\"); };\n r.onresult = (e: any) => {\n let text = \"\", final = false;\n for (const res of e.results) { text += res[0].transcript; if (res.isFinal) final = true; }\n transcript.current = text;\n lastWordAt.current = performance.now();\n setInterim(text);\n clearTimeout(timer.current);\n if (final) commit(\"sentence ended\");\n else timer.current = setTimeout(() => commit(`${silenceMs} ms of silence`), silenceMs);\n };\n r.onerror = (e: any) => { if (e.error !== \"aborted\" && e.error !== \"no-speech\") setStatus(`microphone: ${e.error}`); };\n r.onend = () => {\n rec.current = null;\n setListening(false);\n if (onRef.current && !busyRef.current && !sent.current) start();\n };\n rec.current = r;\n r.start();\n }\n\n function stop() {\n onRef.current = false; setOn(false);\n clearTimeout(timer.current); transcript.current = \"\"; setInterim(\"\");\n try { rec.current?.abort(); } catch { /* ignore */ }\n rec.current = null; setListening(false); setStatus(\"\");\n }\n\n function toggle() {\n if (on) stop();\n else { onRef.current = true; setOn(true); start(); }\n }\n\n // The agent finished: allow the next send and listen again.\n useEffect(() => {\n if (!busy) { sent.current = false; if (onRef.current && !rec.current) start(); }\n }, [busy]);\n\n return { supported, on, listening, interim, status, toggle, start: () => { onRef.current = true; setOn(true); start(); } };\n}\n",[],[201,272,264],"components","7b8d8914-f76b-4036-b229-3d9355bbf89c","Overlay.tsx","fa4b1250-a7d5-11f1-9310-1607ee4eb77e",16,["D",1788467289415],"/** @jsxImportSource https://esm.sh/react@18.2.0 */\nimport { useEffect, useState } from \"https://esm.sh/react@18.2.0\";\n\nexport type Toast = {\n id: string;\n at: number;\n kind: \"said\" | \"result\" | \"error\";\n text: string;\n since?: number;\n diffs?: { path: string; added: string[]; removed: number }[];\n stats?: { turns: number; toolCalls: number; tokens: number; tps: number; totalMs: number };\n};\n\nconst LIFE: Record = { said: 5000, result: 9000, error: 12000 };\nconst FADE = 1500;\nconst ms = (n: number) => n >= 1000 ? `${(n / 1000).toFixed(2)} s` : `${Math.round(n)} ms`;\n\n// Everything drawn over the page: the words being heard, what the agent is doing, and the fading\n// cards for what was said and what changed. The mic control sits in the corner.\nexport function Overlay({ toasts, interim, live, mic, typed, onTyped, onSubmit, onExpire }: {\n toasts: Toast[];\n interim: string;\n live: { text: string; tools: string[]; turns: number } | null;\n mic: { supported: boolean; on: boolean; listening: boolean; status: string; toggle: () => void };\n typed: string | null;\n onTyped: (t: string | null) => void;\n onSubmit: (text: string) => void;\n onExpire: (id: string) => void;\n}) {\n const [now, setNow] = useState(performance.now());\n useEffect(() => {\n const t = setInterval(() => setNow(performance.now()), 100);\n return () => clearInterval(t);\n }, []);\n useEffect(() => {\n for (const t of toasts) if (now - t.at > LIFE[t.kind]) onExpire(t.id);\n }, [now]);\n\n const opacity = (t: Toast) => Math.max(0, Math.min(1, (LIFE[t.kind] - (now - t.at)) / FADE));\n\n return (\n <>\n \n {mic.listening ? \"●\" : \"🎙\"}\n \n\n

\n {toasts.map((t) => (\n

\n {t.kind === \"said\" && (\n

\n {t.text}\n {t.since !== undefined && sent {t.since} ms after the last word}\n

\n )}\n {t.kind === \"result\" && (\n

{t.text}

\n {t.diffs?.map((d) => (\n

{d.path} · +{d.added.length} −{d.removed} lines

\n {d.added.slice(0, 6).map((l, i) =>

+ {l.trim()}

)}\n {d.added.length > 6 &&

… {d.added.length - 6} more

}\n

\n ))}\n {t.stats && (\n

\n {t.stats.tps.toLocaleString()} tok/s · {t.stats.tokens.toLocaleString()} tokens · {t.stats.turns} turn{t.stats.turns === 1 ? \"\" : \"s\"} · {t.stats.toolCalls} tool call{t.stats.toolCalls === 1 ? \"\" : \"s\"} · {ms(t.stats.totalMs)}\n

\n )}\n

\n )}\n {t.kind === \"error\" &&

{t.text}

}\n

\n ))}\n\n {live && (\n

\n {live.tools.length ? live.tools.map((x, i) =>

{x}

) :

thinking…

}\n {live.text &&

{live.text}

}\n

\n )}\n\n {interim && (\n

{interim}

\n )}\n\n {typed !== null && (\n onTyped((e.target as HTMLInputElement).value)}\n onKeyDown={(e) => {\n if (e.key === \"Enter\") onSubmit(typed);\n if (e.key === \"Escape\") onTyped(null);\n }}\n placeholder=\"Say or type what to build or change\"\n className=\"pointer-events-auto w-full max-w-2xl rounded-2xl border border-gray-300 bg-white px-5 py-3 text-lg shadow-lg focus:outline-none focus:ring-2 focus:ring-blue-500\"\n />\n )}\n

\n \n );\n}\n",[],[201,272,274],"bf388288-c77d-4dcf-9057-7e07023e9960","App.tsx","01a068eb-ca36-70ad-ae0b-9ba9da2d93cc",15,["D",1788467267535],"/** @jsxImportSource https://esm.sh/react@18.2.0 */\nimport { useEffect, useRef, useState } from \"https://esm.sh/react@18.2.0\";\nimport { useVoice } from \"./VoiceButton.tsx\";\nimport { Overlay } from \"./Overlay.tsx\";\nimport type { Toast } from \"./Overlay.tsx\";\n\n// Voice-first: the page being built fills the screen. What you say appears at the bottom and fades;\n// what changed, and how fast, appears the same way after each run. Typing any key opens a text box.\nconst PARAMS = new URLSearchParams(location.search);\nconst MODEL = PARAMS.get(\"model\") || \"openai/gpt-oss-120b@cerebras\";\nconst SILENCE_MS = Number(PARAMS.get(\"silence\")) || 700;\nconst AUTO_VOICE = PARAMS.get(\"voice\") !== \"0\";\n\nfunction lineDiff(before: string, after: string) {\n const a = before.split(\"\\n\"), b = after.split(\"\\n\");\n const countA = new Map(); for (const l of a) countA.set(l, (countA.get(l) ?? 0) + 1);\n const added: string[] = []; const remaining = new Map(countA);\n for (const l of b) { const n = remaining.get(l) ?? 0; if (n > 0) remaining.set(l, n - 1); else added.push(l); }\n const removed = [...remaining.values()].reduce((s, n) => s + n, 0);\n return { added, removed };\n}\n\nexport function App() {\n const [messages, setMessages] = useState([]);\n const [files, setFiles] = useState>({});\n const [loading, setLoading] = useState(false);\n const [toasts, setToasts] = useState([]);\n const [typed, setTyped] = useState(null);\n const [live, setLive] = useState<{ text: string; tools: string[]; turns: number } | null>(null);\n const iframeRef = useRef(null);\n const filesRef = useRef(files);\n filesRef.current = files;\n const messagesRef = useRef(messages);\n messagesRef.current = messages;\n\n const toast = (t: Omit) => setToasts((prev) => [...prev.slice(-5), { ...t, id: crypto.randomUUID(), at: performance.now() }]);\n\n function render(html: string) {\n const doc = iframeRef.current?.contentDocument;\n if (!doc) return;\n try { doc.open(); doc.write(html); doc.close(); } catch { /* not ready */ }\n }\n\n async function send(instruction: string) {\n if (loading) return;\n setLoading(true);\n setLive({ text: \"\", tools: [], turns: 0 });\n const before = filesRef.current;\n const startedAt = performance.now();\n let tokens = 0, decodeMs = 0;\n try {\n const res = await fetch(\"/api/agent\", {\n method: \"POST\",\n headers: { \"Content-Type\": \"application/json\" },\n body: JSON.stringify({ messages: messagesRef.current, files: before, instruction, model: MODEL }),\n });\n if (!res.ok || !res.body) throw new Error((await res.json().catch(() => ({})))?.error ?? `Request failed (${res.status})`);\n const reader = res.body.getReader();\n const decoder = new TextDecoder();\n let buffer = \"\";\n while (true) {\n const { done, value } = await reader.read();\n if (done) break;\n buffer += decoder.decode(value, { stream: true });\n const frames = buffer.split(\"\\n\\n\");\n buffer = frames.pop() ?? \"\";\n for (const frame of frames) {\n const line = frame.split(\"\\n\").find((l) => l.startsWith(\"data:\"));\n if (!line) continue;\n const event = JSON.parse(line.slice(5).trim());\n switch (event.type) {\n case \"text\": setLive((l) => l && { ...l, text: l.text + event.text }); break;\n case \"tool\": setLive((l) => l && { ...l, tools: [...l.tools, `${event.name} ${event.args}`] }); break;\n case \"turn\": tokens += event.stats.completionTokens; decodeMs += event.stats.totalMs - event.stats.ttftMs; setLive((l) => l && { ...l, turns: event.stats.index }); break;\n case \"files\": setFiles(event.files); if (event.files[\"index.html\"] !== undefined) render(event.files[\"index.html\"]); break;\n case \"done\": {\n setMessages(event.messages);\n setFiles(event.files);\n const changed = Object.keys(event.files).filter((p) => event.files[p] !== before[p]);\n const diffs = changed.map((p) => ({ path: p, ...lineDiff(before[p] ?? \"\", event.files[p]) }));\n toast({ kind: \"result\", text: event.messages.at(-1)?.content ?? \"\", diffs, stats: { turns: event.totals.turns, toolCalls: event.totals.toolCalls, tokens, tps: decodeMs > 0 ? Math.round(tokens / (decodeMs / 1000)) : 0, totalMs: performance.now() - startedAt } });\n break;\n }\n case \"error\": throw new Error(event.message);\n }\n }\n }\n } catch (err) {\n toast({ kind: \"error\", text: err instanceof Error ? err.message : String(err) });\n } finally {\n setLoading(false);\n setLive(null);\n }\n }\n\n const voice = useVoice({\n silenceMs: SILENCE_MS,\n busy: loading,\n onFinal: (text, since) => { toast({ kind: \"said\", text, since }); send(text); },\n });\n\n useEffect(() => { if (AUTO_VOICE && voice.supported) voice.start(); }, []);\n\n // Type anywhere to get a text box; Enter sends, Escape closes.\n useEffect(() => {\n const onKey = (e: KeyboardEvent) => {\n if (typed !== null || e.metaKey || e.ctrlKey || e.altKey) return;\n if (e.key.length === 1) { setTyped(e.key); e.preventDefault(); }\n };\n window.addEventListener(\"keydown\", onKey);\n return () => window.removeEventListener(\"keydown\", onKey);\n }, [typed]);\n\n return (\n

Diff · v19