Nexus AI

`));\napp.get(\"/__immutable/*\", (c) => serveImmutableFile(c.req.path));\napp.get(\"/source\", (c) => c.redirect(parseVal().links.self.val));\napp.get(\"/frontend/*\", (c) => serveFile(c.req.path));\n\napp.post(\"/api/chat\", async (c) => {\n const body = await c.req.json().catch(() => ({}));\n const message = String(body.message ?? \"\").trim();\n if (!message) return c.json({ error: \"Message required\" }, 400);\n const key = Deno.env.get(\"OPENAI_API_KEY\");\n if (!key) return c.json({ reply: \"Nexus AI is ready, but OPENAI_API_KEY has not been configured yet.\" });\n const r = await fetch(\"https://api.openai.com/v1/responses\", { method: \"POST\", headers: { \"Content-Type\": \"application/json\", Authorization: `Bearer ${key}` }, body: JSON.stringify({ model: \"gpt-5-mini\", input: message }) });\n if (!r.ok) return c.json({ error: \"AI provider error\" }, 502);\n const data = await r.json();\n const reply = data.output_text ?? data.output?.flatMap((x:any)=>x.content??[]).map((x:any)=>x.text??\"\").join(\"\") ?? \"No response.\";\n return c.json({ reply });\n});\n\napp.get(\"/api/plans\", (c) => c.json({ plans: [\n { id: \"monthly\", name: \"Monthly Membership\", price: \"RM 19.90/month\", priceIdConfigured: Boolean(Deno.env.get(\"STRIPE_MONTHLY_PRICE_ID\")) },\n { id: \"annual\", name: \"Annual Membership\", price: \"RM 199/year\", priceIdConfigured: Boolean(Deno.env.get(\"STRIPE_ANNUAL_PRICE_ID\")) }\n] }));\n\napp.post(\"/api/create-checkout-session\", async (c) => {\n const secret = Deno.env.get(\"STRIPE_SECRET_KEY\");\n if (!secret) return c.json({ error: \"Stripe is not configured. Add STRIPE_SECRET_KEY and the Stripe Price IDs to this Val.\" }, 503);\n const body = await c.req.json().catch(() => ({}));\n const plan = body.plan === \"annual\" ? \"annual\" : \"monthly\";\n const priceId = plan === \"annual\" ? Deno.env.get(\"STRIPE_ANNUAL_PRICE_ID\") : Deno.env.get(\"STRIPE_MONTHLY_PRICE_ID\");\n if (!priceId) return c.json({ error: `Stripe ${plan} Price ID is not configured.` }, 503);\n const stripe = new Stripe(secret);\n const origin = new URL(c.req.url).origin;\n const session = await stripe.checkout.sessions.create({\n mode: \"subscription\",\n line_items: [{ price: priceId, quantity: 1 }],\n success_url: `${origin}/?subscription=success`,\n cancel_url: `${origin}/?subscription=cancelled`,\n allow_promotion_codes: true,\n });\n return c.json({ url: session.url });\n});\n\nexport default app.fetch;\n","children",[],[186],["D",1788499623693],[],[18],"07fb37d3-eb74-4adc-90a7-d25b49ca3df3","CHANGELOG.md","01a06ae2-7f87-7027-8a5e-082d3961a727",["D",1788499623693],"# Changelog\n\n## 2026-07-30 — Immutable asset caching\n\nFrontend files are now served at version-addressed URLs\n(`/__immutable/45/frontend/index.tsx`) with\n`Cache-Control: public, max-age=31536000, immutable`, so repeat visits load the\nwhole client graph from the browser cache — roughly 3× faster (~665ms → ~157ms\nmeasured). Publishing your val bumps its version, which changes every URL, so\ncaches invalidate automatically. Old-version URLs return 404 after a publish\n(like Next.js build assets); a reload picks up the new version.\n\nWhat changed in the template:\n\n- `frontend/index.html` → [`frontend/root.tsx`](/frontend/root.tsx): the HTML\n shell is now JSX and stamps asset URLs with `immutableFileUrl()`\n- [`index.ts`](/index.ts): serves `Root()` at `/`, and one\n `app.get(\"/__immutable/*\", (c) => serveImmutableFile(c.req.path))` route\n serves all frontend files\n\n### Upgrading an existing remix\n\nYour copy of this template doesn't update automatically. Two options:\n\n**Minimal (most of the benefit):** point both routes at `serveImmutableFile` —\nyour existing bare URLs redirect into versioned space, the new route serves\nthem, and the whole module graph gets cached (costs one redirect per page view):\n\n```ts\nimport { serveImmutableFile } from \"https://esm.town/v/std/utils/index.ts\";\n\napp.get(\"/__immutable/*\", (c) => serveImmutableFile(c.req.path));\napp.get(\"/frontend/**/*\", (c) => serveImmutableFile(c.req.path)); // was serveFile\n```\n\n**Full upgrade (also removes the redirect):** three self-contained steps —\nno other files needed. Adjust the ``, favicon, and body of `Root()` to\nmatch your app's existing `index.html`, and stamp anything else your shell\nreferences directly (images, css) with `immutableFileUrl()`.\n\n1. Create `frontend/root.tsx`:\n\n```tsx\n/** @jsxImportSource npm:hono@4/jsx */\nimport { raw } from \"npm:hono@4/html\";\nimport { immutableFileUrl } from \"https://esm.town/v/std/utils/index.ts\";\n\n// The HTML shell for the app. It is never cached, so immutableFileUrl can stamp\n// the current val version into each asset URL — the browser caches those\n// immutably, and publishing the val changes the URLs, refetching exactly once.\nexport function Root() {\n return (\n <>\n {raw(\"<!DOCTYPE html>\")}\n <html lang=\"en\">\n <head>\n <meta charSet=\"UTF-8\" />\n <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\" />\n <title>React Hono Val Town Starter\n

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