`, 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

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@jsxImportSource https://esm.sh/react@18.2.0 */\n\ntype P = { class?: string };\nconst base = (p: P, d: string, extra?: any) => (\n \n {d.split(\"|\").map((seg, i) => )}\n \n);\n\nexport const Plus = (p: P) => base(p, \"M12 5v14|M5 12h14\");\nexport const Search = (p: P) => base(p, \"M21 21l-4.3-4.3|M11 18a7 7 0 1 0 0-14 7 7 0 0 0 0 14z\");\nexport const Monitor = (p: P) => base(p, \"M4 4h16a1 1 0 0 1 1 1v10a1 1 0 0 1-1 1H4a1 1 0 0 1-1-1V5a1 1 0 0 1 1-1z|M8 20h8|M12 16v4\");\nexport const Box = (p: P) => base(p, \"M4 5a1 1 0 0 1 1-1h14a1 1 0 0 1 1 1v14a1 1 0 0 1-1 1H5a1 1 0 0 1-1-1z|M4 10h16|M9 10v10\");\nexport const Settings = (p: P) => base(p, \"M12 15a3 3 0 1 0 0-6 3 3 0 0 0 0 6z|M19.4 15a1.7 1.7 0 0 0 .3 1.8l.1.1a2 2 0 1 1-2.8 2.8l-.1-.1a1.7 1.7 0 0 0-1.8-.3 1.7 1.7 0 0 0-1 1.5V21a2 2 0 1 1-4 0v-.1a1.7 1.7 0 0 0-1.1-1.5 1.7 1.7 0 0 0-1.8.3l-.1.1a2 2 0 1 1-2.8-2.8l.1-.1a1.7 1.7 0 0 0 .3-1.8 1.7 1.7 0 0 0-1.5-1H3a2 2 0 1 1 0-4h.1a1.7 1.7 0 0 0 1.5-1.1 1.7 1.7 0 0 0-.3-1.8l-.1-.1a2 2 0 1 1 2.8-2.8l.1.1a1.7 1.7 0 0 0 1.8.3H9a1.7 1.7 0 0 0 1-1.5V3a2 2 0 1 1 4 0v.1a1.7 1.7 0 0 0 1 1.5 1.7 1.7 0 0 0 1.8-.3l.1-.1a2 2 0 1 1 2.8 2.8l-.1.1a1.7 1.7 0 0 0-.3 1.8V9a1.7 1.7 0 0 0 1.5 1H21a2 2 0 1 1 0 4h-.1a1.7 1.7 0 0 0-1.5 1z\");\nexport const ChevronDown = (p: P) => base(p, \"M6 9l6 6 6-6\");\nexport const Sidebar = (p: P) => base(p, \"M3 5a2 2 0 0 1 2-2h14a2 2 0 0 1 2 2v14a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2z|M9 3v18\");\nexport const Logo = (p: P) => base(p, \"M12 3l8 4.5v9L12 21l-8-4.5v-9z|M12 12l8-4.5|M12 12v9|M12 12L4 7.5\");\nexport const Mic = (p: P) => base(p, \"M12 2a3 3 0 0 1 3 3v7a3 3 0 0 1-6 0V5a3 3 0 0 1 3-3z|M19 10v2a7 7 0 0 1-14 0v-2|M12 19v3\");\nexport const Waveform = (p: P) => base(p, \"M4 10v4|M8 7v10|M12 4v16|M16 7v10|M20 10v4\");\nexport const LogOut = (p: P) => base(p, \"M9 21H5a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2h4|M16 17l5-5-5-5|M21 12H9\");\nexport const Share = (p: P) => base(p, \"M4 12v7a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2v-7|M16 6l-4-4-4 4|M12 2v13\");\nexport const Menu = (p: P) => base(p, \"M4 6h16|M4 12h16|M4 18h16\");\nexport const Zap = (p: P) => base(p, \"M13 2L3 14h9l-1 8 10-12h-9l1-8z\");\nexport const ArrowUp = (p: P) => base(p, \"M12 19V5|M5 12l7-7 7 7\");\nexport const Square = (p: P) => base(p, \"M6 6h12v12H6z\");\n","createdAt",["D",1789381846924],"branchVersion","branchId","ee78e4df-9d49-44fe-a93c-3490446f2d42","id","1d4bc60c-9190-4e3b-80f0-e611e6a52e5e","my-chatbot",["D",1789381586527],"deletedAt","legacyEnvVars","privacy","public","httpPrivacy","description","Streaming chat UI powered by an LLM API","imageUrl","cd125b90-c51e-4c9f-9274-8dacceb59852","pinnedFileId","01a09f74-2eca-779e-bf47-465c91838701","pinPreview",true,"pinMigrated","screenshotVersion","likeCount",0,"orgId","01a09f6f-2947-7517-92e3-569021a3ec8a","tursoName","1d4bc60c91904e3b80f0e611e6a52e5e","tursoHostname","1d4bc60c91904e3b80f0e611e6a52e5e-val-town.aws-us-east-2.turso.io","tursoMeasuredAt",["D",1789468860049],"pinned","userPerm","r","valPerm","blobPerm","rw","emailPerm","sqlitePerm","projectPerm","telemetryPerm","user",{"_105":104,"_112":108},"org",{"_105":104,"_106":104,"_107":108,"_19":60,"_109":110,"_111":30},"branch",{"_13":94,"_37":95,"_48":47,"_96":49,"_97":-5,"_98":-5,"_99":-5,"_100":-5,"_101":-5,"_102":50,"_103":104},"isOwned",23,"main","projectId","forkedBranchId","forkedBranchVersion","forkedProjectPrivacy","forkedProjectId","forkedProjectOrgId","projectName","userHandle","testprojects","handle","displayName","avatar","https://lh3.googleusercontent.com/a/ACg8ocL19u9RGAmDi0AaCxbkMHCSzRnP6BNSjl-M4pd-6tcF-ESMtg=s96-c","tier","free","canRestrictVals","profileImageUrl","branchName","","adoptOrgId",{"_48":49,"_37":50,"_43":278,"_52":-5,"_53":30,"_54":55,"_56":55,"_57":58,"_59":-5,"_19":60,"_61":62,"_63":64,"_65":-5,"_66":-5,"_67":68,"_69":70,"_71":72,"_73":74,"_75":279,"_77":-5,"_78":79,"_80":79,"_81":82,"_83":82,"_84":82,"_85":79,"_86":79,"_87":280,"_89":281,"_91":282,"_93":30},"tree",[179,190,191,192],"files",[179,180,181,182,183,184,185,186,187,188,189,190,191,192],"counts",{"_169":68,"_170":153,"_171":68,"_172":173,"_174":175},"contents",[135,136,137,138],"upstreamProject","upstreamBranch","emptyEnvVars","flags",[],"hasHttpFiles","grants","orgs","customDomains",{},{"_48":163,"_37":164,"_35":165,"_141":-5,"_46":47,"_45":153,"_143":64,"_43":166,"_13":68,"_39":167,"_41":-5,"_29":30,"_148":-5,"_32":168},{"_48":157,"_37":158,"_35":159,"_141":-5,"_46":47,"_45":153,"_143":64,"_43":160,"_13":68,"_39":26,"_41":161,"_29":30,"_148":-5,"_32":162},{"_48":150,"_37":151,"_35":152,"_141":-5,"_46":47,"_45":153,"_143":64,"_43":154,"_13":68,"_39":26,"_41":155,"_29":30,"_148":-5,"_32":156},{"_48":139,"_37":140,"_35":62,"_141":-5,"_46":47,"_45":142,"_143":30,"_43":144,"_13":145,"_39":146,"_41":147,"_29":30,"_148":50,"_32":149},"88bfa774-6300-408b-889e-49a798ec29ad","index.ts","parentId",9,"latest",["D",1789381670748],3,"http","import { parseVal, serveImmutableFile } from \"https://esm.town/v/std/utils/index.ts\";\nimport { Hono } from \"npm:hono\";\nimport { streamSSE } from \"npm:hono@4/streaming\";\nimport { Root } from \"./frontend/root.tsx\";\n\nconst app = new Hono();\n\n// Serve the (never-cached) HTML shell at the root /\napp.get(\"/\", (c) => c.html(Root()));\n\n// Serve frontend files at the version-addressed URLs Root() stamps, cached immutably\napp.get(\"/__immutable/*\", (c) => serveImmutableFile(c.req.path));\n\n// View source redirect\napp.get(\"/source\", (c) => c.redirect(parseVal().links.self.val));\n\n// Chat endpoint — proxies a streaming OpenRouter chat completion as SSE\napp.post(\"/api/chat\", async (c) => {\n const apiKey = Deno.env.get(\"OPENROUTER_API_KEY\");\n if (!apiKey) {\n return c.json({ error: \"OPENROUTER_API_KEY is not set on this val\" }, 500);\n }\n const { messages } = await c.req.json();\n const model = Deno.env.get(\"OPENROUTER_MODEL\") ?? \"openai/gpt-4o-mini\";\n return streamSSE(c, async (stream) => {\n const upstream = await fetch(\"https://openrouter.ai/api/v1/chat/completions\", {\n method: \"POST\",\n headers: {\n \"Content-Type\": \"application/json\",\n Authorization: `Bearer ${apiKey}`,\n // Optional but recommended by OpenRouter — no tracking unless you set these\n \"HTTP-Referer\": \"https://my-chatbot.val.run\",\n \"X-Title\": \"Val Town Chatbot\",\n },\n body: JSON.stringify({ model, messages, stream: true }),\n });\n if (!upstream.ok || !upstream.body) {\n const text = await upstream.text().catch(() => \"\");\n throw new Error(`OpenRouter error ${upstream.status}: ${text.slice(0, 300)}`);\n }\n const reader = upstream.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 lines = buffer.split(\"\\n\");\n buffer = lines.pop() ?? \"\";\n for (const line of lines) {\n const trimmed = line.trim();\n if (!trimmed.startsWith(\"data:\")) continue;\n const data = trimmed.slice(5).trim();\n if (data === \"[DONE]\") return;\n try {\n const json = JSON.parse(data);\n const delta = json.choices?.[0]?.delta?.content;\n if (delta) {\n await stream.writeSSE({ data: JSON.stringify({ delta }) });\n }\n } catch {\n /* ignore malformed chunks */\n }\n }\n }\n await stream.close();\n });\n});\n\n// Unwrap and rethrow Hono errors as the original error\n// If you delete this, all errors will be \"Internal Server Error\"\napp.onError((err) => Promise.reject(err));\n\n// HTTP vals expect an exported \"fetch handler\"\n// This is how you \"run the server\" in Val Town with Hono\nexport default app.fetch;\n","label",[140],"ef9e0035-a6aa-4695-8962-cafea439c74b","README.md","01a09f74-2eca-779e-bf47-439f9bd87169",1,["D",1789381586527],"# 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],"3d18e2c8-0e43-4652-869f-3c1ffc084bc4","CHANGELOG.md","01a09f74-2eca-779e-bf47-3f51db77eb9f",["D",1789381586527],"# 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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