Nexus AI

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`));\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","createdAt",["D",1788500255461],"branchVersion","branchId","0907ac60-516d-4316-b248-129ff01bacc4","id","fb3a4e7a-19fe-4597-9d18-715bf4822a15","nexus-ai-chat-v2",["D",1788499623693],"deletedAt","legacyEnvVars","privacy","public","httpPrivacy","description","Nexus AI chat with membership subscriptions","imageUrl","5e09ff70-68df-4bd4-858a-c860165ee7aa","pinnedFileId","pinPreview",true,"pinMigrated","screenshotVersion","likeCount",0,"orgId","01a06aba-e253-7656-932f-ae0ebf784a8c","tursoName","tursoHostname","tursoMeasuredAt","pinned","userPerm","r","valPerm","blobPerm","rw","emailPerm","sqlitePerm","projectPerm","telemetryPerm","user",{"_98":97,"_106":102},"org",{"_98":97,"_99":100,"_101":102,"_18":55,"_103":104,"_105":25},"branch",{"_13":85,"_32":86,"_43":42,"_87":44,"_88":89,"_90":14,"_91":50,"_92":93,"_94":64,"_95":45,"_96":97},"isOwned",4,"main","projectId","forkedBranchId","e79f0355-9471-4050-ab62-766b8a59a46b","forkedBranchVersion","forkedProjectPrivacy","forkedProjectId","c32632df-a90a-4dc1-8300-eefbf9177893","forkedProjectOrgId","projectName","userHandle","Shinnzicco","handle","displayName","shinzicco Isaac","avatar","https://lh3.googleusercontent.com/a/ACg8ocK2aNRCFAwAAvrSA96I1NbQYIj6BW_pMQg3UJCH-rqKJbMOXnw=s96-c","tier","free","canRestrictVals","profileImageUrl","branchName","","adoptOrgId",{"_43":44,"_32":45,"_38":244,"_47":-5,"_48":25,"_49":50,"_51":50,"_52":53,"_54":-5,"_18":55,"_56":31,"_57":58,"_59":-5,"_60":-5,"_61":62,"_63":64,"_65":-5,"_66":-5,"_67":-5,"_68":-5,"_69":70,"_71":70,"_72":73,"_74":73,"_75":73,"_76":70,"_77":70,"_78":245,"_80":246,"_82":247,"_84":25},"tree",[179,186,187,188],"files",[179,180,181,182,183,184,185,186,187,188],"counts",{"_169":62,"_170":153,"_171":62,"_172":173,"_174":175},"contents",[139,140,141,142],"upstreamProject",{"_43":93,"_32":136,"_52":137,"_54":-5,"_49":50,"_78":138},"upstreamBranch",{"_43":89,"_38":131,"_132":133,"_32":86,"_87":93,"_13":14,"_88":-5,"_90":-5,"_134":135,"_47":-5,"_84":25,"_49":50,"_96":97,"_63":64,"_95":136},"emptyEnvVars","flags",[],"hasHttpFiles","grants","orgs","customDomains",{},["D",1788499439663],"updatedAt",["D",1788499456555],"lockfileKey","1788499456621-esm.town_v_Shinnzicco_nexus-ai-chat@3-main","nexus-ai-chat","Nexus AI chat with subscription plans",{"_98":97,"_106":102},{"_43":163,"_32":164,"_30":165,"_144":-5,"_41":42,"_40":153,"_145":58,"_38":166,"_13":62,"_33":167,"_35":-5,"_24":25,"_148":-5,"_27":168},{"_43":157,"_32":158,"_30":159,"_144":-5,"_41":42,"_40":153,"_145":58,"_38":160,"_13":62,"_33":20,"_35":161,"_24":25,"_148":-5,"_27":162},{"_43":150,"_32":151,"_30":152,"_144":-5,"_41":42,"_40":153,"_145":58,"_38":154,"_13":62,"_33":20,"_35":155,"_24":25,"_148":-5,"_27":156},{"_43":143,"_32":28,"_30":31,"_144":-5,"_41":42,"_40":14,"_145":58,"_38":146,"_13":147,"_33":34,"_35":37,"_24":25,"_148":-5,"_27":149},"5b2f88ea-4baf-4df3-9528-5578791d3ae6","parentId","latest",["D",1788500255461],2,"label",[28],"4cc6d88d-aa92-448e-b7a5-4ae8f4c0f146","README.md","01a06ae2-7f87-7027-8a5e-0f8b21b8ae3c",1,["D",1788499623693],"# React + Hono Starter\n\nA minimal starter template for building client-side React apps with a Hono\nbackend on Val Town. Click **Remix** to get your own copy.\n\n## Picking a starter\n\n| Starter | When to pick it |\n| --- | --- |\n| [`basic-html-starter`](https://www.val.town/x/templates/basic-html-starter) | Static HTML pages. Sprinkle of vanilla JS. No server-side rendering. |\n| [`hono-jsx-starter`](https://www.val.town/x/templates/hono-jsx-starter) | Dynamic server-rendered HTML with JSX. API routes. No React, no SPA. |\n| **[`react-hono-starter`](https://www.val.town/x/templates/react-hono-starter)** *(you're here)* | Client-side React SPA with a Hono API backend. |\n\n**Want to build UI?** Start writing React components in\n[`frontend/components/`](/frontend/components/). Import them into `App.tsx` and\nyou're good to go. Styling is [Twind](https://twind.style/) — just use Tailwind\nutility classes, zero config.\n\n**Want to add an API?** Add routes in [`index.ts`](/index.ts) (there's a\ncommented-out example). Fetch them from your React components.\n\n## Architecture\n\n```mermaid\ngraph LR\n Browser -->|\"GET /\"| Hono[\"index.ts
(Hono server)\"]\n Hono -->|serves| HTML[\"root.tsx\"]\n HTML -->|loads| Entry[\"index.tsx\"]\n Entry -->|renders| App[\"App.tsx\"]\n App -->|renders| Counter[\"Counter.tsx\"]\n```\n\n## File structure\n\n```\nindex.ts ← Hono backend (serves frontend + API routes)\nfrontend/\n root.tsx ← HTML shell (stamps immutable asset URLs)\n index.tsx ← React entrypoint (mounts )\n favicon.svg ← App icon\n components/\n App.tsx ← Root component (layout + view source link)\n Counter.tsx ← Example component with state\n```\n\n## How it works\n\n1. **`index.ts`** is the HTTP entrypoint — a Hono server that serves the\n frontend and any API routes you add.\n2. **`frontend/root.tsx`** is the HTML shell — it loads Twind and stamps\n immutable asset URLs for the favicon and React entrypoint.\n3. **`frontend/index.tsx`** mounts the React app.\n4. **`frontend/components/App.tsx`** is the root layout — add new components\n alongside it.\n5. **`frontend/components/Counter.tsx`** is an example stateful component —\n replace it with your own!\n\n## Next steps\n\n- Add API routes in `index.ts`\n- Add new components in `frontend/components/`\n- Add a SQLite database — see the\n [React Hono Example](https://www.val.town/x/stevekrouse/reactHonoExample) for\n a full-stack example with database, queries, and shared types\n\nTemplate updates and upgrade paths for existing remixes: [CHANGELOG.md](/CHANGELOG.md)\n",[151],"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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