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React + Hono Starter

\n \n

\n View source\n

\n );\n}\n","/** @jsxImportSource https://esm.sh/react@18.2.0 */\nimport { useState } from \"https://esm.sh/react@18.2.0\";\n\nexport function App() {\n const [messages, setMessages] = useState>([]);\n const [input, setInput] = useState(\"\");\n const [busy, setBusy] = useState(false);\n\n async function send() {\n const message = input.trim();\n if (!message || busy) return;\n setInput(\"\");\n setMessages((m) => [...m, { role: \"user\", text: message }]);\n setBusy(true);\n try {\n const res = await fetch(\"/api/chat\", {\n method: \"POST\",\n headers: { \"Content-Type\": \"application/json\" },\n body: JSON.stringify({ message }),\n });\n const data = await res.json();\n setMessages((m) => [...m, { role: \"assistant\", text: data.reply ?? \"NICKO received the message.\" }]);\n } catch {\n setMessages((m) => [...m, { role: \"assistant\", text: \"NICKO Core connection error.\" }]);\n } finally {\n setBusy(false);\n }\n }\n\n return (\n

NICKO

AI CORE • v0.1.0

● ONLINE

\n\n

\n {messages.length === 0 ? (\n

◈

Welcome to NICKO

Your intelligent workspace for chat, memory, tools, multimodal input, and autonomous agents.

\n ) : (\n

\n {messages.map((m, i) => (\n

{m.role}

{m.text}

\n ))}\n

\n )}\n\n

\n setInput(e.currentTarget.value)}\n onKeyDown={(e) => { if (e.key === \"Enter\") send(); }}\n placeholder=\"Ask NICKO anything...\"\n class=\"flex-1 bg-transparent outline-none px-3 py-3 text-white placeholder-slate-500\"\n />\n \n

\n );\n}\n","createdAt",["D",1788884483260],"branchVersion","branchId","dc384f21-08fb-437a-860b-99134d5ae711","id","62c654f6-f082-4d9e-b814-c7a8cccc8d43","nicko-ai-core",["D",1788884447838],"deletedAt","legacyEnvVars","privacy","public","httpPrivacy","description","NICKO AI: multimodal chat and agent platform","imageUrl","db1fe498-e3ce-41c4-9a4b-aadc5f270e6a","pinnedFileId","01a081d2-72e5-73cc-8bcf-123ed15e236a","pinPreview",true,"pinMigrated","screenshotVersion","likeCount",0,"orgId","01a07c20-e282-758d-b417-c7f20f2b254c","tursoName","62c654f6f0824d9eb814c7a8cccc8d43","tursoHostname","62c654f6f0824d9eb814c7a8cccc8d43-val-town.aws-us-east-2.turso.io","tursoMeasuredAt",["D",1789492268774],"pinned","userPerm","r","valPerm","blobPerm","rw","emailPerm","sqlitePerm","projectPerm","telemetryPerm","user",{"_101":100,"_109":105},"org",{"_101":100,"_102":103,"_104":105,"_18":56,"_106":107,"_108":25},"branch",{"_13":90,"_32":91,"_44":43,"_92":45,"_93":-5,"_94":-5,"_95":-5,"_96":-5,"_97":-5,"_98":46,"_99":100},"isOwned",7,"main","projectId","forkedBranchId","forkedBranchVersion","forkedProjectPrivacy","forkedProjectId","forkedProjectOrgId","projectName","userHandle","NITHISHLUNA","handle","displayName","Nithish A","avatar","https://lh3.googleusercontent.com/a/ACg8ocLBGQxmuCLHRSTF1yuHm9tD4J7yNqIAKG1E18bHib3Blbra9m1Z=s96-c","tier","free","canRestrictVals","profileImageUrl","branchName","","adoptOrgId",{"_44":45,"_32":46,"_39":236,"_48":-5,"_49":25,"_50":51,"_52":51,"_53":54,"_55":-5,"_18":56,"_57":58,"_59":60,"_61":-5,"_62":-5,"_63":64,"_65":66,"_67":68,"_69":70,"_71":237,"_73":-5,"_74":75,"_76":75,"_77":78,"_79":78,"_80":78,"_81":75,"_82":75,"_83":238,"_85":239,"_87":240,"_89":25},"tree",[175,182,183,184],"files",[175,176,177,178,179,180,181,182,183,184],"counts",{"_165":64,"_166":142,"_167":64,"_168":169,"_170":171},"contents",[132,133,134,135],"upstreamProject","upstreamBranch","emptyEnvVars","flags",[],"hasHttpFiles","grants","orgs","customDomains",{},{"_44":159,"_32":160,"_30":161,"_138":-5,"_42":43,"_41":142,"_140":60,"_39":162,"_13":64,"_34":163,"_36":-5,"_24":25,"_145":-5,"_27":164},{"_44":153,"_32":154,"_30":155,"_138":-5,"_42":43,"_41":142,"_140":60,"_39":156,"_13":64,"_34":20,"_36":157,"_24":25,"_145":-5,"_27":158},{"_44":147,"_32":148,"_30":149,"_138":-5,"_42":43,"_41":142,"_140":60,"_39":150,"_13":64,"_34":20,"_36":151,"_24":25,"_145":-5,"_27":152},{"_44":136,"_32":137,"_30":58,"_138":-5,"_42":43,"_41":139,"_140":25,"_39":141,"_13":142,"_34":143,"_36":144,"_24":25,"_145":-5,"_27":146},"bbd8cc13-a497-4b41-b87b-65c40e3e7299","index.ts","parentId",2,"latest",["D",1788884473120],1,"http","import { parseVal, serveImmutableFile } from \"https://esm.town/v/std/utils/index.ts\";\nimport { Hono } from \"npm:hono\";\nimport { Root } from \"./frontend/root.tsx\";\n\nconst app = new Hono();\n\napp.get(\"/\", (c) => c.html(Root()));\napp.get(\"/__immutable/*\", (c) => serveImmutableFile(c.req.path));\napp.get(\"/source\", (c) => c.redirect(parseVal().links.self.val));\n\n// NICKO API foundation. The model provider is intentionally injected later\n// through a server-side environment variable; secrets never belong in the UI.\napp.get(\"/api/health\", (c) => c.json({\n ok: true,\n name: \"NICKO\",\n version: \"0.1.0\",\n capabilities: [\"chat\", \"memory\", \"tools\", \"multimodal\", \"agents\"],\n}));\n\napp.post(\"/api/chat\", async (c) => {\n const body = await c.req.json().catch(() => ({}));\n const message = typeof body.message === \"string\" ? body.message.trim() : \"\";\n if (!message) return c.json({ error: \"message is required\" }, 400);\n\n // Provider adapter comes next. Keeping this route stable lets the frontend\n // work while we add OpenAI/other model providers and tool routing.\n return c.json({\n ok: true,\n reply: \"NICKO Core is online. AI provider connection is the next module.\",\n received: message,\n conversationId: typeof body.conversationId === \"string\" ? body.conversationId : crypto.randomUUID(),\n });\n});\n\napp.onError((err) => Promise.reject(err));\nexport default app.fetch;\n","label",[137],"60a00836-e676-4344-86ab-4a678a6a3778","README.md","01a081d2-72e5-73cc-8bcf-0e488ac78dc9",["D",1788884447838],"# 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",[148],"010ba10b-ae88-40a7-96c3-8f54d2819a21","CHANGELOG.md","01a081d2-72e5-73cc-8bcf-09ba554c75c9",["D",1788884447838],"# 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

Diff · v3