`, 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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parsed[0] : parsed;\n }\n try { return JSON.parse(text); } catch { return {raw:text.slice(0,1000)}; }\n}\nasync function rpc(body: any, session?: string) {\n const r = await fetch(URL, {\n method:\"POST\",\n headers:{\n \"Content-Type\":\"application/json\",\n \"Accept\":\"application/json, text/event-stream\",\n ...(session ? {\"Mcp-Session-Id\":session} : {}),\n },\n body:JSON.stringify(body),\n });\n const text = await r.text();\n return {status:r.status,ok:r.ok,contentType:r.headers.get(\"content-type\"),session:r.headers.get(\"mcp-session-id\"),wwwAuth:r.headers.get(\"www-authenticate\"),body:parseBody(r.headers.get(\"content-type\"),text)};\n}\n\nconst init = await rpc({jsonrpc:\"2.0\",id:1,method:\"initialize\",params:{protocolVersion:\"2025-06-18\",capabilities:{},clientInfo:{name:\"PayAna-Market-Sentinel\",version:\"0.1.0\"}}});\nlet tools:any=null;\nif (init.ok) {\n const session = init.session ?? undefined;\n await rpc({jsonrpc:\"2.0\",method:\"notifications/initialized\",params:{}},session);\n tools = await rpc({jsonrpc:\"2.0\",id:2,method:\"tools/list\",params:{}},session);\n}\nconst compactTools = Array.isArray(tools?.body?.result?.tools) ? tools.body.result.tools.map((t:any)=>({name:t.name,description:String(t.description??\"\").slice(0,300),inputSchema:t.inputSchema})).slice(0,100) : null;\nconsole.log(JSON.stringify({fetchedAt:new Date().toISOString(),init:{status:init.status,ok:init.ok,contentType:init.contentType,sessionPresent:Boolean(init.session),wwwAuth:init.wwwAuth,body:init.body},tools:tools?{status:tools.status,ok:tools.ok,contentType:tools.contentType,wwwAuth:tools.wwwAuth,count:compactTools?.length??null,items:compactTools,body:compactTools?undefined:tools.body}:null}));\n","createdAt",["D",1788812711249],"branchVersion","branchId","182c3c5a-4b2f-4ec3-8cf6-a4632f8ec886","id","71ad8a44-f36c-41e9-a978-0707deb4f71b","payana-binance-agent-os",["D",1788812694161],"deletedAt","legacyEnvVars","privacy","public","httpPrivacy","description","PayAna Falsifier Agent — evidence-first Binance market audit","imageUrl","6cc24525-830b-4db3-9c9c-fd19fb50e91f","pinnedFileId","01a07d8b-9306-748f-a55c-5a7124e2c8be","pinPreview",true,"pinMigrated","screenshotVersion","likeCount",0,"orgId","01a0773d-9d6b-7580-a53a-683363c351c8","tursoName","71ad8a44f36c41e9a9780707deb4f71b","tursoHostname","71ad8a44f36c41e9a9780707deb4f71b-val-town.aws-us-east-2.turso.io","tursoMeasuredAt",["D",1789509043237],"pinned","userPerm","r","valPerm","blobPerm","rw","emailPerm","sqlitePerm","projectPerm","telemetryPerm","user",{"_99":98,"_107":103},"org",{"_99":98,"_100":101,"_102":103,"_18":54,"_104":105,"_106":24},"branch",{"_13":88,"_32":89,"_42":41,"_90":43,"_91":-5,"_92":-5,"_93":-5,"_94":-5,"_95":-5,"_96":44,"_97":98},"isOwned",52,"main","projectId","forkedBranchId","forkedBranchVersion","forkedProjectPrivacy","forkedProjectId","forkedProjectOrgId","projectName","userHandle","cleitoncosta","handle","displayName","Cleiton Costa","avatar","https://lh3.googleusercontent.com/a/ACg8ocIgWisWQiXts_2fy5iRiRgl8A6c7Ef94eqE3ur-4mlyUrpCBmQ=s96-c","tier","free","canRestrictVals","profileImageUrl","branchName","","adoptOrgId",{"_42":43,"_32":44,"_37":247,"_46":-5,"_47":24,"_48":49,"_50":49,"_51":52,"_53":-5,"_18":54,"_55":56,"_57":58,"_59":-5,"_60":-5,"_61":62,"_63":64,"_65":66,"_67":68,"_69":248,"_71":-5,"_72":73,"_74":73,"_75":76,"_77":76,"_78":76,"_79":73,"_80":73,"_81":249,"_83":250,"_85":251,"_87":24},"tree",[179,186,187,188,189],"files",[179,180,181,182,183,184,185,186,187,188,189],"counts",{"_167":62,"_168":169,"_170":171,"_172":173,"_174":175},"contents",[130,131,132,133,134],"upstreamProject","upstreamBranch","emptyEnvVars","flags",[],"hasHttpFiles","grants","orgs","customDomains",{},{"_42":161,"_32":162,"_30":163,"_137":-5,"_40":41,"_39":138,"_139":58,"_37":164,"_13":62,"_33":165,"_35":-5,"_23":24,"_143":-5,"_26":166},{"_42":155,"_32":156,"_30":157,"_137":-5,"_40":41,"_39":138,"_139":24,"_37":158,"_13":62,"_33":20,"_35":159,"_23":24,"_143":-5,"_26":160},{"_42":149,"_32":150,"_30":151,"_137":-5,"_40":41,"_39":138,"_139":24,"_37":152,"_13":62,"_33":20,"_35":153,"_23":24,"_143":-5,"_26":154},{"_42":146,"_32":27,"_30":31,"_137":-5,"_40":41,"_39":14,"_139":24,"_37":147,"_13":62,"_33":34,"_35":36,"_23":24,"_143":-5,"_26":148},{"_42":135,"_32":136,"_30":56,"_137":-5,"_40":41,"_39":138,"_139":24,"_37":140,"_13":62,"_33":141,"_35":142,"_23":24,"_143":144,"_26":145},"47be5d63-3259-4d31-933d-abf135a13b95","index.ts","parentId",1,"latest",["D",1788812694161],"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","payana-agent-os",[136],"5ddb565d-b51d-40f2-af86-59fe94d2b5ca",["D",1788812711249],[27],"4985762b-a63d-49f3-a3c3-a7ad08373328","README.md","01a07d8b-9306-748f-a55c-55a2e635552d",["D",1788812694161],"# 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",[150],"eaab9317-c39c-4a0d-9fe8-bfdf35065f98","CHANGELOG.md","01a07d8b-9306-748f-a55c-52427940545d",["D",1788812694161],"# 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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