`, 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 \n

\n );\n}\n","label",[157,158,65],"frontend","components","pulls","branches",1,"forks","envVars",{"_167":26,"_169":26},"connections",{"_167":26,"_168":26},"count","unfilledCount","emptyCount",{"_32":368,"_13":360,"_63":354,"_42":-5,"_34":35,"_150":224,"_151":86,"_36":369,"_38":26,"_66":263,"_153":-5,"_68":24,"_155":-5,"_201":370,"_17":371},{"_32":361,"_13":362,"_63":363,"_42":354,"_34":35,"_150":112,"_151":86,"_36":364,"_38":39,"_66":67,"_153":365,"_68":24,"_155":-5,"_201":366,"_17":367},{"_32":351,"_13":352,"_63":353,"_42":354,"_34":35,"_150":355,"_151":86,"_36":356,"_38":26,"_66":67,"_153":357,"_68":24,"_155":-5,"_201":358,"_17":359},{"_32":347,"_13":157,"_63":221,"_42":-5,"_34":35,"_150":161,"_151":86,"_36":348,"_38":26,"_66":263,"_153":-5,"_68":24,"_155":-5,"_201":349,"_17":350},{"_32":343,"_13":158,"_63":149,"_42":221,"_34":35,"_150":161,"_151":86,"_36":344,"_38":26,"_66":263,"_153":-5,"_68":24,"_155":-5,"_201":345,"_17":346},{"_32":334,"_13":335,"_63":336,"_42":149,"_34":35,"_150":337,"_151":86,"_36":338,"_38":339,"_66":67,"_153":340,"_68":24,"_155":-5,"_201":341,"_17":342},{"_32":148,"_13":65,"_63":64,"_42":149,"_34":35,"_150":39,"_151":86,"_36":331,"_38":26,"_66":67,"_153":154,"_68":24,"_155":-5,"_201":332,"_17":333},{"_32":322,"_13":323,"_63":324,"_42":149,"_34":35,"_150":325,"_151":86,"_36":326,"_38":327,"_66":67,"_153":328,"_68":24,"_155":-5,"_201":329,"_17":330},{"_32":314,"_13":315,"_63":316,"_42":149,"_34":35,"_150":317,"_151":86,"_36":318,"_38":161,"_66":67,"_153":319,"_68":24,"_155":-5,"_201":320,"_17":321},{"_32":306,"_13":307,"_63":308,"_42":149,"_34":35,"_150":309,"_151":86,"_36":310,"_38":161,"_66":67,"_153":311,"_68":24,"_155":-5,"_201":312,"_17":313},{"_32":298,"_13":299,"_63":300,"_42":149,"_34":35,"_150":301,"_151":86,"_36":302,"_38":26,"_66":67,"_153":303,"_68":24,"_155":-5,"_201":304,"_17":305},{"_32":290,"_13":291,"_63":292,"_42":149,"_34":35,"_150":293,"_151":86,"_36":294,"_38":224,"_66":67,"_153":295,"_68":24,"_155":-5,"_201":296,"_17":297},{"_32":282,"_13":283,"_63":284,"_42":149,"_34":35,"_150":285,"_151":86,"_36":286,"_38":161,"_66":67,"_153":287,"_68":24,"_155":-5,"_201":288,"_17":289},{"_32":274,"_13":275,"_63":276,"_42":149,"_34":35,"_150":277,"_151":86,"_36":278,"_38":26,"_66":67,"_153":279,"_68":24,"_155":-5,"_201":280,"_17":281},{"_32":266,"_13":267,"_63":268,"_42":149,"_34":35,"_150":269,"_151":86,"_36":270,"_38":26,"_66":67,"_153":271,"_68":24,"_155":-5,"_201":272,"_17":273},{"_32":260,"_13":251,"_63":245,"_42":221,"_34":35,"_150":261,"_151":86,"_36":262,"_38":26,"_66":263,"_153":-5,"_68":24,"_155":-5,"_201":264,"_17":265},{"_32":252,"_13":253,"_63":254,"_42":245,"_34":35,"_150":255,"_151":86,"_36":256,"_38":26,"_66":67,"_153":257,"_68":24,"_155":-5,"_201":258,"_17":259},{"_32":242,"_13":243,"_63":244,"_42":245,"_34":35,"_150":246,"_151":86,"_36":247,"_38":224,"_66":67,"_153":248,"_68":24,"_155":-5,"_201":249,"_17":250},{"_32":235,"_13":236,"_63":237,"_42":221,"_34":35,"_150":161,"_151":86,"_36":238,"_38":26,"_66":21,"_153":239,"_68":24,"_155":-5,"_201":240,"_17":241},{"_32":228,"_13":229,"_63":230,"_42":221,"_34":35,"_150":161,"_151":86,"_36":231,"_38":26,"_66":67,"_153":232,"_68":24,"_155":-5,"_201":233,"_17":234},{"_32":218,"_13":219,"_63":220,"_42":221,"_34":35,"_150":222,"_151":86,"_36":223,"_38":224,"_66":67,"_153":225,"_68":24,"_155":-5,"_201":226,"_17":227},{"_32":211,"_13":212,"_63":213,"_42":-5,"_34":35,"_150":161,"_151":86,"_36":214,"_38":26,"_66":21,"_153":215,"_68":24,"_155":-5,"_201":216,"_17":217},{"_32":204,"_13":205,"_63":206,"_42":-5,"_34":35,"_150":161,"_151":86,"_36":207,"_38":26,"_66":21,"_153":208,"_68":24,"_155":-5,"_201":209,"_17":210},{"_32":194,"_13":195,"_63":84,"_42":-5,"_34":35,"_150":196,"_151":86,"_36":197,"_38":198,"_66":199,"_153":200,"_68":24,"_155":-5,"_201":202,"_17":203},"c8981a8a-0dce-4c7c-b2d8-ccf1d1437db7","index.ts",38,["D",1788376361503],4,"http","import { parseVal, serveImmutableFile } from \"https://esm.town/v/std/utils/index.ts\";\nimport { Hono } from \"npm:hono\";\nimport { Root } from \"./frontend/root.tsx\";\nimport { RHYTHMS } from \"./backend/rhythms-data.ts\";\nimport { TWELVE_LEAD_CASES } from \"./backend/twelve-lead-data.ts\";\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// List all rhythms (summary only — no questions in the payload).\n// Every rhythm is unlocked content-wise; the free/Pro split is now a daily\n// practice cap enforced client-side, not a content paywall.\napp.get(\"/api/rhythms\", (c) => {\n const list = [...RHYTHMS]\n .sort((a, b) => a.sortOrder - b.sortOrder)\n .map(({ questions, ...summary }) => ({\n ...summary,\n locked: false,\n questionCount: questions.length,\n }));\n return c.json(list);\n});\n\n// Single rhythm detail — full content, including quiz questions, for everyone.\napp.get(\"/api/rhythms/:id\", (c) => {\n const rhythm = RHYTHMS.find((r) => r.id === c.req.param(\"id\"));\n if (!rhythm) return c.json({ error: \"not found\" }, 404);\n return c.json({\n ...rhythm,\n locked: false,\n });\n});\n\n// List all 12-lead cases (summary only — leadFindings + questions omitted).\napp.get(\"/api/twelve-lead\", (c) => {\n const list = [...TWELVE_LEAD_CASES]\n .sort((a, b) => a.sortOrder - b.sortOrder)\n .map(({ leadFindings, questions, ...summary }) => ({\n ...summary,\n questionCount: questions.length,\n }));\n return c.json(list);\n});\n\n// Single 12-lead case detail — full content, including per-lead findings and quiz questions.\napp.get(\"/api/twelve-lead/:id\", (c) => {\n const twelveLead = TWELVE_LEAD_CASES.find((t) => t.id === c.req.param(\"id\"));\n if (!twelveLead) return c.json({ error: \"not found\" }, 404);\n return c.json(twelveLead);\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","children",[],[195],"f174df99-6739-437c-b218-528fe54153d7","README.md","01a0633c-efa7-770e-92de-f8c87a88692d",["D",1788371332863],"# 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",[],[205],"4d03780d-716e-4f3b-9cdf-f3d72852a379","CHANGELOG.md","01a0633c-efa7-770e-92de-f742abd282c5",["D",1788371332863],"# 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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