`, 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",{"_259":260,"_261":262},"routes/_app.x.$handle.$name",{"_105":104,"_32":50,"_114":95,"_27":115,"_13":14,"_116":-5,"_11":117,"_118":119,"_120":121,"_122":123,"_124":125,"_21":-5,"_126":-5,"_127":-5,"_128":25,"_129":130,"_131":64,"_132":-5,"_133":-5,"_134":135},"routes/_app.x.$handle.$name.branch.$branch.version.$version.diff",{"_11":12,"_13":14,"_15":16,"_17":-5,"_18":-5},"project",{"_48":49,"_32":50,"_38":51,"_52":-5,"_53":25,"_54":55,"_56":55,"_57":58,"_59":-5,"_18":60,"_61":62,"_63":64,"_65":-5,"_66":-5,"_67":68,"_69":70,"_71":72,"_73":74,"_75":76,"_77":-5,"_78":79,"_80":79,"_81":82,"_83":82,"_84":82,"_85":79,"_86":79,"_87":88,"_89":90,"_91":92,"_93":25},"version",2,"changes",[19,20],"aiChatInfo","userId",{"_21":43,"_23":-7,"_24":25,"_26":25,"_27":44,"_29":44},{"_21":22,"_23":-7,"_24":25,"_26":25,"_27":28,"_29":28},"file",{"_30":31,"_32":33,"_34":35,"_36":37,"_38":39,"_40":14,"_41":42,"_24":25},"previous","deleted",false,"deletedHere","path","lib/engine.ts","latestPath","fileId","ffabd9b4-b1da-11f1-acb3-1607ee4eb77e","name","engine.ts","fileType","script","content","export type MediaMode = \"image\" | \"video\";\n\nexport interface ShotSpec {\n prompt: string;\n mode: MediaMode;\n aspect: string;\n duration: number;\n lens: number;\n aperture: number;\n iso: number;\n shutter: string;\n realism: number;\n motion: number;\n reference: boolean;\n}\n\nexport function compileShot(spec: ShotSpec) {\n const warnings: string[] = [];\n const prompt = spec.prompt.trim();\n if (!prompt) warnings.push(\"Décris la scène à capturer.\");\n if (spec.mode === \"image\" && spec.duration !== 1) warnings.push(\"La durée est ignorée en mode photo.\");\n return {\n scene: prompt,\n camera: {\n focalLengthMm: spec.lens,\n aperture: spec.aperture,\n iso: spec.iso,\n shutter: spec.shutter,\n exposureStyle: \"natural\",\n depthOfField: \"optical\",\n },\n physics: {\n gravity: true,\n collisions: true,\n massAndInertia: true,\n clothHairMotion: true,\n naturalMotion: spec.motion,\n },\n humanRealism: {\n skinTexture: \"natural\",\n facialAsymmetry: true,\n microExpressions: true,\n blinking: true,\n breathing: true,\n gaze: \"natural\",\n hands: \"tracked\",\n },\n temporalConsistency: spec.mode === \"video\" ? \"identity + lighting + geometry locked\" : \"single-frame\",\n antiArtificiality: [\n \"no plastic skin\",\n \"no beauty filter\",\n \"no fake cinematic glow\",\n \"no excessive sharpening\",\n \"no texture repetition\",\n \"no floating objects\",\n \"no temporal flicker\",\n ],\n colorPipeline: \"camera-like neutral response with highlight rolloff and natural sensor noise\",\n referenceLocked: spec.reference,\n qualityGate: {\n minimumRealism: spec.realism,\n regenerateOnFailure: true,\n },\n warnings,\n };\n}\n","createdAt",["D",1789568957549],"branchVersion","branchId","a7613ece-a578-4724-aebc-be9a4598ab48",{"_30":45,"_32":44,"_34":46,"_36":-5,"_38":47,"_40":14,"_41":42,"_24":25},"lib","0d81be1e-b2d2-47a2-bd2c-e037885a86a4","directory",["D",1789568957549],"id","8f282234-7b21-4835-8dfe-b11376415cdd","reality-camera-studio",["D",1789568911615],"deletedAt","legacyEnvVars","privacy","public","httpPrivacy","description","Photorealistic image and video generation studio","imageUrl","60cfc669-b7f7-4ed6-aa69-72dac2809e21","pinnedFileId","01a0aa9e-8d5a-722e-8769-8ed17bf83441","pinPreview",true,"pinMigrated","screenshotVersion","likeCount",0,"orgId","01a0aa9d-1e4a-71cf-a458-950b0565fe64","tursoName","8f2822347b2148358dfeb11376415cdd","tursoHostname","8f2822347b2148358dfeb11376415cdd-val-town.aws-us-east-2.turso.io","tursoMeasuredAt",["D",1789655476524],"pinned","userPerm","r","valPerm","blobPerm","rw","emailPerm","sqlitePerm","projectPerm","telemetryPerm","user",{"_105":104,"_113":109},"org",{"_105":104,"_106":107,"_108":109,"_18":60,"_110":111,"_112":25},"branch",{"_13":94,"_32":95,"_48":42,"_96":49,"_97":-5,"_98":-5,"_99":-5,"_100":-5,"_101":-5,"_102":50,"_103":104},"isOwned",9,"main","projectId","forkedBranchId","forkedBranchVersion","forkedProjectPrivacy","forkedProjectId","forkedProjectOrgId","projectName","userHandle","juniorsainte","handle","displayName","Junior Sainte","avatar","https://lh3.googleusercontent.com/a/ACg8ocIPymqHBXqXNjY5_9CwfNeROgzXBXPMaAKC5e0aKPa0mI-8HQ=s96-c","tier","free","canRestrictVals","profileImageUrl","branchName","","adoptOrgId",{"_48":49,"_32":50,"_38":254,"_52":-5,"_53":25,"_54":55,"_56":55,"_57":58,"_59":-5,"_18":60,"_61":62,"_63":64,"_65":-5,"_66":-5,"_67":68,"_69":70,"_71":72,"_73":74,"_75":255,"_77":-5,"_78":79,"_80":79,"_81":82,"_83":82,"_84":82,"_85":79,"_86":79,"_87":256,"_89":257,"_91":258,"_93":25},"tree",[181,188,190,191,192],"files",[181,182,183,184,185,186,187,188,189,190,191,192],"counts",{"_171":68,"_172":144,"_173":68,"_174":175,"_176":177},"contents",[136,137,138,139,140],"upstreamProject","upstreamBranch","emptyEnvVars","flags",[],"hasHttpFiles","grants","orgs","customDomains",{},{"_48":166,"_32":167,"_30":168,"_143":-5,"_41":42,"_40":144,"_145":64,"_38":169,"_13":68,"_34":46,"_36":-5,"_24":25,"_149":-5,"_27":170},{"_48":163,"_32":44,"_30":45,"_143":-5,"_41":42,"_40":14,"_145":64,"_38":164,"_13":68,"_34":46,"_36":-5,"_24":25,"_149":-5,"_27":165},{"_48":157,"_32":158,"_30":159,"_143":-5,"_41":42,"_40":144,"_145":64,"_38":160,"_13":68,"_34":21,"_36":161,"_24":25,"_149":-5,"_27":162},{"_48":151,"_32":152,"_30":153,"_143":-5,"_41":42,"_40":144,"_145":64,"_38":154,"_13":68,"_34":21,"_36":155,"_24":25,"_149":-5,"_27":156},{"_48":141,"_32":142,"_30":62,"_143":-5,"_41":42,"_40":144,"_145":25,"_38":146,"_13":68,"_34":147,"_36":148,"_24":25,"_149":-5,"_27":150},"a52fa233-8ad2-4293-9c03-84401ec66967","index.ts","parentId",1,"latest",["D",1789568911615],"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\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// Add your API routes here\n// app.get(\"/api/data\", c => c.json({ hello: \"world\" }));\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",[142],"376b80e5-7c37-45a8-a51a-e562c9406fbb","README.md","01a0aa9e-8d5a-722e-8769-8ac07fe559cb",["D",1789568911615],"# 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",[152],"4ff7678a-ba44-4ba0-a0de-8d0c28ac3037","CHANGELOG.md","01a0aa9e-8d5a-722e-8769-8400a3ccb6a2",["D",1789568911615],"# 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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