`, 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

[{"_1":2,"_3":-5,"_4":-5},"loaderData",{"_5":6,"_7":8,"_9":10},"actionData","errors","root",{"_258":259,"_260":261},"routes/_app.x.$handle.$name",{"_11":12,"_13":14,"_15":16,"_18":19,"_17":-7,"_194":-5,"_20":195,"_22":196,"_197":198,"_199":200,"_26":201,"_24":202,"_203":-5,"_204":-5,"_205":52,"_206":207,"_208":43,"_209":-5,"_210":-5,"_211":212},"routes/_app.x.$handle.$name.branch.$branch.code.$",{"_11":12,"_13":14,"_15":16,"_17":-7,"_18":19,"_20":21,"_22":23,"_24":25,"_26":27,"_28":-5,"_29":-5,"_30":-5,"_31":-5,"_32":-5},"handle","brandonschoelkoph","name","isntx-marketplace","branchName","main","version","path","index.ts","project",{"_33":136,"_13":14,"_44":137,"_138":-5,"_139":52,"_140":141,"_142":141,"_143":144,"_145":-5,"_146":147,"_148":36,"_149":43,"_150":-5,"_151":-5,"_152":67,"_153":154,"_155":156,"_157":158,"_159":160,"_161":-5,"_162":163,"_164":163,"_165":166,"_167":166,"_168":166,"_169":163,"_170":163,"_171":172,"_173":174,"_175":176,"_177":52},"tree",[55,56,57,58],"file",{"_33":34,"_13":19,"_35":36,"_37":-5,"_38":39,"_40":41,"_42":43,"_44":45,"_17":46,"_47":48,"_49":50,"_51":52,"_53":14,"_18":54},"contents",[],"upstream","pull","ahead","behind","envVars","id","e114c42f-4e23-4abe-b782-308c655ebf7e","fileId","01a09db7-7d5f-76d8-be0b-68e42adc088b","parentId","branchId","dffa64ec-0e06-44e3-a75f-3637cf8fed39","branchVersion",2,"latest",true,"createdAt",["D",1789352542109],1,"fileType","http","content","import { parseVal, serveImmutableFile } from \"https://esm.town/v/std/utils/index.ts\";\nimport { sqlite } from \"https://esm.town/v/std/sqlite/main.ts\";\nimport { Hono } from \"npm:hono\";\nimport { Root } from \"./frontend/root.tsx\";\n\nconst app = new Hono();\nawait sqlite.execute(`CREATE TABLE IF NOT EXISTS leads (\n id INTEGER PRIMARY KEY AUTOINCREMENT,\n name TEXT NOT NULL,\n email TEXT NOT NULL,\n company TEXT,\n phone TEXT,\n interest TEXT NOT NULL,\n budget TEXT,\n message TEXT,\n created_at TEXT DEFAULT CURRENT_TIMESTAMP\n)`);\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));\napp.get(\"/api/health\", (c) => c.json({ ok: true, brand: \"ISNTX\" }));\n\napp.post(\"/api/leads\", async (c) => {\n const body = await c.req.json();\n const name = String(body.name || \"\").trim();\n const email = String(body.email || \"\").trim();\n const interest = String(body.interest || \"\").trim();\n if (!name || !email || !interest || !email.includes(\"@\")) {\n return c.json({ ok: false, error: \"Name, valid email, and interest are required.\" }, 400);\n }\n await sqlite.execute({\n sql: \"INSERT INTO leads (name,email,company,phone,interest,budget,message) VALUES (?,?,?,?,?,?,?)\",\n args: [name, email, String(body.company||\"\"), String(body.phone||\"\"), interest, String(body.budget||\"\"), String(body.message||\"\")],\n });\n return c.json({ ok: true, message: \"Thanks — Brandon will review your request personally.\" });\n});\n\napp.onError((err) => Promise.reject(err));\nexport default app.fetch;\n","deleted",false,"label",[19],{"_33":78,"_13":79,"_35":80,"_37":-5,"_38":39,"_40":46,"_42":43,"_44":81,"_17":67,"_47":82,"_49":-5,"_51":52,"_53":-5,"_60":83,"_18":84},{"_33":71,"_13":72,"_35":73,"_37":-5,"_38":39,"_40":46,"_42":43,"_44":74,"_17":67,"_47":24,"_49":75,"_51":52,"_53":-5,"_60":76,"_18":77},{"_33":63,"_13":64,"_35":65,"_37":-5,"_38":39,"_40":46,"_42":43,"_44":66,"_17":67,"_47":24,"_49":68,"_51":52,"_53":-5,"_60":69,"_18":70},{"_33":34,"_13":19,"_35":36,"_37":-5,"_38":39,"_40":41,"_42":43,"_44":59,"_17":46,"_47":48,"_49":50,"_51":52,"_53":14,"_60":61,"_18":62},["D",1789352542109],"children",[],[19],"f219d941-8627-4840-b5de-28b876e1bd30","README.md","01a09db7-7d5f-76d8-be0b-6462b2e4c9f5",["D",1789352443138],0,"# 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",[],[64],"6f6d59a2-89d5-4504-8da0-139ac7c63b11","CHANGELOG.md","01a09db7-7d5f-76d8-be0b-61309ac544f8",["D",1789352443138],"# 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