Val Town ChatGPT App SDK Starter

A starter template for building ChatGPT apps with MCP (Model Context Protocol) widgets on Val Town.

\n\n

Setup Instructions

\n Copy your MCP endpoint URL:\n
\n
\n Add to ChatGPT:\n
- Open ChatGPT settings
- Navigate to \"Apps\" or \"Integrations\"
- Click \"Add MCP Server\"
- Paste your MCP endpoint URL
\n
\n Test the integration:\n
- Ask ChatGPT: \"List all messages\"
- The widget should appear with the message board interface
\n

\n\n

Available Tools

list_messages - Shows all messages in a widget
get_message - Shows details for a specific message
add_message - Adds a new message to the board

\n\n

Development

Edit the code in backend/ and frontend/widgets/ to customize your app. Changes deploy instantly to Val Town.

\n\n \n\n\n",[],[147,155],"b36218ea-a5e5-11f0-8f15-0224a6c84d84","widgets","0199ce87-fbda-7524-96e6-ee0ed769666d",["D",1760106642287],[167,168,169,170,171,172,173],[147,162],{"_36":215,"_13":216,"_64":217,"_66":163,"_68":69,"_70":71,"_72":73,"_38":218,"_17":32,"_75":85,"_77":-5,"_79":53,"_80":-5,"_100":219,"_18":220},{"_36":208,"_13":209,"_64":210,"_66":163,"_68":69,"_70":71,"_72":73,"_38":211,"_17":32,"_75":76,"_77":212,"_79":53,"_80":-5,"_100":213,"_18":214},{"_36":201,"_13":202,"_64":203,"_66":163,"_68":69,"_70":71,"_72":73,"_38":204,"_17":32,"_75":76,"_77":205,"_79":53,"_80":-5,"_100":206,"_18":207},{"_36":195,"_13":155,"_64":196,"_66":163,"_68":69,"_70":71,"_72":73,"_38":197,"_17":32,"_75":24,"_77":198,"_79":53,"_80":-5,"_100":199,"_18":200},{"_36":188,"_13":189,"_64":190,"_66":163,"_68":69,"_70":71,"_72":73,"_38":191,"_17":32,"_75":76,"_77":192,"_79":53,"_80":-5,"_100":193,"_18":194},{"_36":181,"_13":182,"_64":183,"_66":163,"_68":69,"_70":71,"_72":73,"_38":184,"_17":32,"_75":76,"_77":185,"_79":53,"_80":-5,"_100":186,"_18":187},{"_36":174,"_13":175,"_64":176,"_66":163,"_68":69,"_70":71,"_72":73,"_38":177,"_17":32,"_75":76,"_77":178,"_79":53,"_80":-5,"_100":179,"_18":180},"b36217d2-a5e5-11f0-8f15-0224a6c84d84","widget.tsx","0199ce87-fbda-7524-96e6-e96b6839065a",["D",1760106642287],"/** @jsxImportSource https://esm.sh/react@19 */\nimport { createRoot } from \"https://esm.sh/react-dom@19/client?deps=react@19\";\nimport { RouterProvider } from \"https://esm.sh/@tanstack/react-router@1?deps=react@19\";\nimport { router } from \"./routes.tsx\";\n\nconst appElement = document.getElementById(\"app\");\nif (!appElement) {\n throw new Error(\"App element not found\");\n}\n\nconst root = createRoot(appElement);\nroot.render();\n",[],[147,162,175],"b36215ca-a5e5-11f0-8f15-0224a6c84d84","routes.tsx","0199ce87-fbda-7524-96e6-e6ef2e2f2b95",["D",1760106642287],"/** @jsxImportSource https://esm.sh/react@19 */\nimport {\n createRootRoute,\n createRoute,\n createRouter,\n Outlet,\n} from \"https://esm.sh/@tanstack/react-router@1?deps=react@19\";\nimport { LoadingWidget } from \"./components/LoadingWidget.tsx\";\nimport { MessageListWidget } from \"./components/MessageListWidget.tsx\";\nimport { MessageDetailWidget } from \"./components/MessageDetailWidget.tsx\";\nimport { NavigationSync } from \"./NavigationSync.tsx\";\n\nfunction RootComponent() {\n return (\n <>\n \n \n \n );\n}\n\nconst rootRoute = createRootRoute({\n component: RootComponent,\n});\n\nconst loadingRoute = createRoute({\n getParentRoute: () => rootRoute,\n path: \"/\",\n component: LoadingWidget,\n});\n\nconst listRoute = createRoute({\n getParentRoute: () => rootRoute,\n path: \"/list\",\n component: MessageListWidget,\n});\n\nconst detailRoute = createRoute({\n getParentRoute: () => rootRoute,\n path: \"/detail/$messageId\",\n component: MessageDetailWidget,\n});\n\nconst routeTree = rootRoute.addChildren([\n loadingRoute,\n listRoute,\n detailRoute,\n]);\n\nexport const router = createRouter({ routeTree });\n\ndeclare module \"https://esm.sh/@tanstack/react-router@1?deps=react@19\" {\n interface Register {\n router: typeof router;\n }\n}\n",[],[147,162,182],"b3620fb2-a5e5-11f0-8f15-0224a6c84d84","openai-types.ts","0199ce87-fbda-7524-96e6-e271439a3c20",["D",1760106642287],"type UnknownObject = Record;\n\nexport interface OpenAiGlobals<\n ToolInput extends UnknownObject = UnknownObject,\n ToolOutput extends UnknownObject = UnknownObject,\n ToolResponseMetadata extends UnknownObject = UnknownObject,\n WidgetState extends UnknownObject = UnknownObject,\n> {\n theme: \"light\" | \"dark\";\n userAgent: {\n device: { type: \"mobile\" | \"tablet\" | \"desktop\" | \"unknown\" };\n capabilities: {\n hover: boolean;\n touch: boolean;\n };\n };\n locale: string;\n maxHeight: number;\n displayMode: \"pip\" | \"inline\" | \"fullscreen\";\n safeArea: {\n insets: {\n top: number;\n bottom: number;\n left: number;\n right: number;\n };\n };\n toolInput: ToolInput;\n toolOutput: ToolOutput | null;\n toolResponseMetadata: ToolResponseMetadata | null;\n widgetState: WidgetState | null;\n}\n\nexport interface OpenAIWidgetAPI<\n ToolInput extends UnknownObject = UnknownObject,\n ToolOutput extends UnknownObject = UnknownObject,\n ToolResponseMetadata extends UnknownObject = UnknownObject,\n WidgetState extends UnknownObject = UnknownObject,\n> extends OpenAiGlobals<\n ToolInput,\n ToolOutput,\n ToolResponseMetadata,\n WidgetState\n > {\n setWidgetState: (state: WidgetState) => Promise;\n callTool: (name: string, args: unknown) => Promise;\n sendFollowUpMessage: (params: { prompt: string }) => Promise;\n requestDisplayMode: (mode: \"pip\" | \"inline\" | \"fullscreen\") => Promise;\n}\n\nexport const SET_GLOBALS_EVENT_TYPE = \"openai:set_globals\";\n\nexport interface SetGlobalsEvent\n extends CustomEvent<{ globals: Partial }> {\n type: typeof SET_GLOBALS_EVENT_TYPE;\n}\n\ndeclare global {\n interface Window {\n openai: OpenAIWidgetAPI;\n }\n\n interface WindowEventMap {\n [SET_GLOBALS_EVENT_TYPE]: SetGlobalsEvent;\n }\n}\n\nexport function getOpenAI(): OpenAIWidgetAPI | undefined {\n return window.openai;\n}\n",[],[147,162,189],"b3620e2c-a5e5-11f0-8f15-0224a6c84d84","0199ce87-fbda-7524-96e6-dc9bc3ae9175",["D",1760106642287],"\n\n \n \n \n Widget\n \n \n \n \n

\n \n \n\n",[],[147,162,155],"b3620b34-a5e5-11f0-8f15-0224a6c84d84","hooks.ts","0199ce87-fbda-7524-96e6-d968a01fcb12",["D",1760106642287],"/** @jsxImportSource https://esm.sh/react@19 */\nimport { useCallback, useEffect, useState, useSyncExternalStore } from \"https://esm.sh/react@19\";\nimport type { OpenAiGlobals, SetGlobalsEvent } from \"./openai-types.ts\";\nimport { getOpenAI, SET_GLOBALS_EVENT_TYPE } from \"./openai-types.ts\";\n\ntype UnknownObject = Record;\n\nexport function useOpenAiGlobal(\n key: K,\n): OpenAiGlobals[K] {\n return useSyncExternalStore(\n (onChange) => {\n function handleSetGlobal(event: Event) {\n const setGlobalsEvent = event as SetGlobalsEvent;\n const value = setGlobalsEvent.detail?.globals[key];\n\n if (value === undefined) return;\n onChange();\n }\n\n window.addEventListener(SET_GLOBALS_EVENT_TYPE, handleSetGlobal, {\n passive: true,\n });\n\n return () => {\n window.removeEventListener(SET_GLOBALS_EVENT_TYPE, handleSetGlobal);\n };\n },\n () => window.openai[key],\n );\n}\n\nexport function useToolOutput(): T | null {\n return useOpenAiGlobal(\"toolOutput\") as T | null;\n}\n\nexport function useTheme(): \"light\" | \"dark\" {\n return useOpenAiGlobal(\"theme\");\n}\n\nexport function useWidgetState(\n defaultState: T | (() => T),\n): readonly [T, (state: React.SetStateAction) => void] {\n const widgetStateFromWindow = useOpenAiGlobal(\"widgetState\") as T | null;\n\n const [widgetState, _setWidgetState] = useState(() => {\n return (\n widgetStateFromWindow ??\n (typeof defaultState === \"function\" ? defaultState() : defaultState)\n );\n });\n\n useEffect(() => {\n if (widgetStateFromWindow) {\n _setWidgetState(widgetStateFromWindow);\n }\n }, [widgetStateFromWindow]);\n\n const setWidgetState = useCallback(\n (stateOrUpdater: React.SetStateAction) => {\n _setWidgetState((prevState) => {\n const newState =\n typeof stateOrUpdater === \"function\"\n ? (stateOrUpdater as (prev: T) => T)(prevState)\n : stateOrUpdater;\n\n getOpenAI()?.setWidgetState(newState);\n return newState;\n });\n },\n [],\n );\n\n return [widgetState, setWidgetState] as const;\n}\n",[],[147,162,202],"b3620a1c-a5e5-11f0-8f15-0224a6c84d84","NavigationSync.tsx","0199ce87-fbda-7524-96e6-d537a3c73e32",["D",1760106642287],"/** @jsxImportSource https://esm.sh/react@19 */\nimport { useEffect } from \"https://esm.sh/react@19\";\nimport { useNavigate } from \"https://esm.sh/@tanstack/react-router@1?deps=react@19\";\nimport { useToolOutput } from \"./hooks.ts\";\nimport type { WidgetState } from \"../../shared/types.ts\";\n\nexport function NavigationSync() {\n const data = useToolOutput();\n const navigate = useNavigate();\n\n useEffect(() => {\n if (!data) {\n navigate({ to: \"/\" });\n return;\n }\n\n switch (data.kind) {\n case \"message_list\":\n navigate({ to: \"/list\" });\n break;\n\n case \"message_detail\":\n navigate({\n to: \"/detail/$messageId\",\n params: { messageId: String(data.id) },\n });\n break;\n }\n }, [data, navigate]);\n\n return null;\n}\n",[],[147,162,209],"b36208fa-a5e5-11f0-8f15-0224a6c84d84","components","0199ce87-fbda-7524-96e6-d2efb46d2afe",["D",1760106642287],[221,222,223],[147,162,216],{"_36":238,"_13":239,"_64":240,"_66":217,"_68":69,"_70":71,"_72":73,"_38":241,"_17":32,"_75":76,"_77":242,"_79":53,"_80":-5,"_100":243,"_18":244},{"_36":231,"_13":232,"_64":233,"_66":217,"_68":69,"_70":71,"_72":73,"_38":234,"_17":32,"_75":76,"_77":235,"_79":53,"_80":-5,"_100":236,"_18":237},{"_36":224,"_13":225,"_64":226,"_66":217,"_68":69,"_70":71,"_72":73,"_38":227,"_17":32,"_75":76,"_77":228,"_79":53,"_80":-5,"_100":229,"_18":230},"b36203d2-a5e5-11f0-8f15-0224a6c84d84","MessageListWidget.tsx","0199ce87-fbda-7524-96e6-cc527981c238",["D",1760106642287],"/** @jsxImportSource https://esm.sh/react@19 */\nimport type { MessageListOutput } from \"../../../shared/types.ts\";\nimport { useTheme, useToolOutput } from \"../hooks.ts\";\nimport { getOpenAI } from \"../openai-types.ts\";\n\nexport function MessageListWidget() {\n const data = useToolOutput();\n const theme = useTheme();\n const isDark = theme === \"dark\";\n\n if (!data || data.kind !== \"message_list\") {\n return (\n \n

\n \n \n Loading messages...\n

\n \n );\n }\n\n const { messages } = data;\n\n async function handleAddMessage() {\n await getOpenAI()?.sendFollowUpMessage({\n prompt: \"Add a new message\",\n });\n }\n\n return (\n \n

Messages

\n \n + Add Message\n \n

\n\n {messages.length === 0 ? (\n \n

No messages yet

Click \"Add Message\" to create one

\n \n ) : (\n

\n {messages.map((message) => (\n \n ))}\n

\n )}\n \n );\n}\n\nfunction MessageCard({ message, isDark }) {\n return (\n \n

{message.content}

\n \n {new Date(message.timestamp).toLocaleString()}\n \n \n #{message.id}\n \n

\n \n );\n}\n",[],[147,162,216,225],"b3620166-a5e5-11f0-8f15-0224a6c84d84","MessageDetailWidget.tsx","0199ce87-fbda-7524-96e6-c966a47f993e",["D",1760106642287],"/** @jsxImportSource https://esm.sh/react@19 */\nimport type { MessageDetailOutput } from \"../../../shared/types.ts\";\nimport { useTheme, useToolOutput } from \"../hooks.ts\";\nimport { getOpenAI } from \"../openai-types.ts\";\n\nexport function MessageDetailWidget() {\n const data = useToolOutput();\n const theme = useTheme();\n const isDark = theme === \"dark\";\n\n async function handleBackToList() {\n await getOpenAI()?.sendFollowUpMessage({\n prompt: \"Show me all messages\",\n });\n }\n\n if (!data || data.kind !== \"message_detail\") {\n return (\n \n

\n \n \n Loading message...\n

\n \n );\n }\n\n return (\n \n

Message Details

\n\n \n

{data.content}

\n \n\n

\n \n ID\n

{data.id}

\n\n

\n \n CREATED\n

\n {new Date(data.timestamp).toLocaleString()}\n

\n \n \n\n \n ← Back to List\n \n \n );\n}\n",[],[147,162,216,232],"b361ffae-a5e5-11f0-8f15-0224a6c84d84","LoadingWidget.tsx","0199ce87-fbda-7524-96e6-c6ef23c8b0ba",["D",1760106642287],"/** @jsxImportSource https://esm.sh/react@19 */\nimport { useTheme } from \"../hooks.ts\";\n\nexport function LoadingWidget() {\n const theme = useTheme();\n const isDark = theme === \"dark\";\n\n return (\n \n

\n \n \n Loading...\n

\n \n );\n}\n",[],[147,162,216,239],"b361fe6e-a5e5-11f0-8f15-0224a6c84d84",["D",1760106642287],[249,250,251,252],[82],{"_36":274,"_13":275,"_64":276,"_66":86,"_68":69,"_70":71,"_72":73,"_38":277,"_17":32,"_75":85,"_77":-5,"_79":53,"_80":-5,"_100":278,"_18":279},{"_36":84,"_13":83,"_64":67,"_66":86,"_68":69,"_70":71,"_72":73,"_38":267,"_17":32,"_75":85,"_77":-5,"_79":53,"_80":-5,"_100":268,"_18":269},{"_36":261,"_13":104,"_64":262,"_66":86,"_68":69,"_70":71,"_72":73,"_38":263,"_17":32,"_75":24,"_77":264,"_79":53,"_80":-5,"_100":265,"_18":266},{"_36":253,"_13":254,"_64":255,"_66":86,"_68":69,"_70":71,"_72":73,"_38":256,"_17":32,"_75":257,"_77":258,"_79":53,"_80":-5,"_100":259,"_18":260},"b361faae-a5e5-11f0-8f15-0224a6c84d84","index.ts","0199ce87-fbda-7524-96e6-bd34189f8846",["D",1760106642287],"http","import { parseProject, readFile, serveFile } from \"https://esm.town/v/std/utils/index.ts\";\nimport { Hono } from \"npm:hono\";\nimport { cors } from \"npm:hono/cors\";\nimport { mcpHandler, setBaseUrl } from \"./mcp/server.ts\";\n\nconst app = new Hono();\n\n// Enable CORS for widget assets (ChatGPT iframe needs this)\napp.use(\"/widget-assets/*\", cors({\n origin: \"*\",\n allowMethods: [\"GET\", \"HEAD\", \"OPTIONS\"],\n}));\n\n// Serve setup instructions at the root /\napp.get(\"/\", async c => {\n let html = await readFile(\"/frontend/index.html\", import.meta.url);\n\n // Get this project's URL, in a way that works across forks and branches\n const projectVal = parseProject(import.meta.url);\n const thisProjectURL = projectVal.links.self.project;\n\n // Inject the project URL for the setup instructions\n const dataScript = ``;\n\n // Insert the script right before the closing tag\n html = html.replace(\"\", `${dataScript}`);\n\n return c.html(html);\n});\n\n// MCP endpoint for ChatGPT\napp.all(\"/mcp\", async (c) => {\n // Set base URL before handling MCP request\n const url = new URL(c.req.url);\n setBaseUrl(`${url.protocol}//${url.host}`);\n\n const response = await mcpHandler(c.req.raw);\n return response;\n});\n\n// Serve widget assets with automatic transpilation\napp.get(\"/widget-assets/**/*\", (c) => {\n return serveFile(c.req.path.replace(\"/widget-assets\", \"/frontend/widgets\"), import.meta.url);\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, c) => {\n throw err;\n});\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;",[],[82,254],"b361f0b8-a5e5-11f0-8f15-0224a6c84d84","0199ce87-fbda-7524-96e6-bb409d6b5bb4",["D",1760106642287],"# Backend\n\nThis folder contains all backend code for the MCP server and widget serving.\n\n## Structure\n\n* `index.ts` - Main Hono application entrypoint\n* `database/` - SQLite database schema and queries\n* `mcp/` - MCP server with ChatGPT tools and widget resources\n\n## Hono\n\nThis app uses [Hono](https://hono.dev/) as the web framework. Hono is designed for serverless environments like Val Town and Cloudflare Workers. If you're familiar with Express, Flask, or Sinatra, Hono follows similar patterns.\n\n## Routes\n\nThe backend serves three types of content:\n\n### 1. Root Route (`GET /`)\nServes the setup instructions page with the dynamically injected MCP endpoint URL.\n\n### 2. MCP Endpoint (`ALL /mcp`)\nThe Model Context Protocol server endpoint that ChatGPT connects to. This handles:\n- Tool discovery and execution\n- Widget resource serving\n- Streaming HTTP transport for MCP messages\n\n### 3. Widget Assets (`GET /widget-assets/**`)\nServes the React widget files with automatic TypeScript/TSX transpilation. The backend maps requests from `/widget-assets/*` to `/frontend/widgets/*` and uses Val Town's `serveFile` utility to:\n- Read project files across branches and forks\n- Automatically transpile TSX → JS\n- Set correct content-types\n\nExample: `GET /widget-assets/widget.tsx` → serves transpiled JS from `/frontend/widgets/widget.tsx`\n\n## MCP Server\n\nThe MCP server (`backend/mcp/server.ts`) defines:\n\n1. **Widget Resource** - The HTML template that ChatGPT loads in an iframe\n2. **Tools** - Functions that ChatGPT can call (list_messages, add_message, get_message)\n3. **Widget Metadata** - Configuration for widget behavior, CSP, loading states\n\nEach tool returns structured data with a `kind` discriminator that the widget router uses for navigation.\n\n## Serving Widget HTML\n\nThe widget HTML template (`frontend/widgets/index.html`) contains `__VAL_TOWN_URL__` placeholders that get replaced with the actual deployment URL when the widget resource is requested. This ensures widget assets load from the correct domain across forks and branches.\n\n## Error Handling\n\nBy default, Hono swallows errors and returns \"Internal Server Error\". We override this behavior to see full stack traces:\n\n```typescript\napp.onError((err, c) => {\n throw err;\n});\n```\n\nThis makes debugging easier during development. You can customize this for production.\n",[],[82,104],["D",1760106642287],[270],[82,83],{"_36":62,"_13":63,"_64":65,"_66":67,"_68":69,"_70":71,"_72":73,"_38":271,"_17":32,"_75":76,"_77":78,"_79":53,"_80":-5,"_100":272,"_18":273},["D",1760106642287],[],[82,83,63],"b361e50a-a5e5-11f0-8f15-0224a6c84d84","database","0199ce87-fbda-7524-96e6-ad2e6c99ea27",["D",1760106642287],[280,281,282,283,284],[82,275],{"_36":313,"_13":104,"_64":314,"_66":276,"_68":69,"_70":71,"_72":73,"_38":315,"_17":32,"_75":24,"_77":316,"_79":53,"_80":-5,"_100":317,"_18":318},{"_36":306,"_13":307,"_64":308,"_66":276,"_68":69,"_70":71,"_72":73,"_38":309,"_17":32,"_75":76,"_77":310,"_79":53,"_80":-5,"_100":311,"_18":312},{"_36":299,"_13":300,"_64":301,"_66":276,"_68":69,"_70":71,"_72":73,"_38":302,"_17":32,"_75":76,"_77":303,"_79":53,"_80":-5,"_100":304,"_18":305},{"_36":292,"_13":293,"_64":294,"_66":276,"_68":69,"_70":71,"_72":73,"_38":295,"_17":32,"_75":76,"_77":296,"_79":53,"_80":-5,"_100":297,"_18":298},{"_36":285,"_13":286,"_64":287,"_66":276,"_68":69,"_70":71,"_72":73,"_38":288,"_17":32,"_75":76,"_77":289,"_79":53,"_80":-5,"_100":290,"_18":291},"b361e3fc-a5e5-11f0-8f15-0224a6c84d84","schema.ts","0199ce87-fbda-7524-96e6-ab4d7e3f4c83",["D",1760106642287],"import { sqliteTable, text, integer } from \"npm:drizzle-orm/sqlite-core\";\n\n// Messages table\nexport const messages = sqliteTable(\"messages\", {\n id: integer(\"id\").primaryKey({ autoIncrement: true }),\n content: text(\"content\").notNull(),\n timestamp: text(\"timestamp\").notNull().default(new Date().toISOString()),\n});\n\n// Type exports\nexport type Message = typeof messages.$inferSelect;",[],[82,275,286],"b361e2bc-a5e5-11f0-8f15-0224a6c84d84","queries.ts","0199ce87-fbda-7524-96e6-a70a239e6683",["D",1760106642287],"import { desc } from \"npm:drizzle-orm\";\nimport { db, schema } from \"./db.ts\";\nimport { createTables } from \"./migrations.ts\";\nimport { MESSAGE_LIMIT } from \"../../shared/utils.ts\";\n\n// This will create the database table if it doesn't exist.\n// This will run every time the app starts up. You can\n// comment out this line for a modest (30ms) performance improvement\n// on cold starts. It's left in to ensure the database tables are\n// automatically set up correctly for users who fork this app.\nawait createTables();\n\nexport async function getMessages(limit = MESSAGE_LIMIT) {\n const messages = await db\n .select()\n .from(schema.messages)\n .orderBy(desc(schema.messages.timestamp))\n .limit(limit)\n .all();\n \n return messages;\n}\n\nexport async function insertMessage(content: string) {\n await db\n .insert(schema.messages)\n .values({\n content,\n timestamp: new Date().toISOString(),\n })\n .run();\n}",[],[82,275,293],"b361e172-a5e5-11f0-8f15-0224a6c84d84","migrations.ts","0199ce87-fbda-7524-96e6-a01c85e80bd1",["D",1760106642287],"import { sql } from \"npm:drizzle-orm\";\nimport { db } from \"./db.ts\";\n\nexport async function createTables() {\n // Uncomment to reset database\n await db.run(sql`DROP TABLE IF EXISTS messages`);\n // Create messages table\n await db.run(sql`\n CREATE TABLE IF NOT EXISTS messages (\n id INTEGER PRIMARY KEY AUTOINCREMENT,\n content TEXT NOT NULL,\n timestamp TEXT NOT NULL DEFAULT (datetime('now'))\n )\n `);\n}",[],[82,275,300],"b361de48-a5e5-11f0-8f15-0224a6c84d84","db.ts","0199ce87-fbda-7524-96e6-9de157aeec5d",["D",1760106642287],"import { sqlite } from \"https://esm.town/v/std/sqlite\";\nimport { drizzle } from \"npm:drizzle-orm/libsql\";\nimport * as schema from \"./schema.ts\";\n\n// Create Drizzle instance with Val Town's sqlite\nexport const db = drizzle(sqlite as any);\n\n// Export schema for convenience\nexport { schema };",[],[82,275,307],"b361d48e-a5e5-11f0-8f15-0224a6c84d84","0199ce87-fbda-7524-96e6-9b65d6f0ebb5",["D",1760106642287],"# Database\n\nThis app uses [Val Town SQLite](https://docs.val.town/std/sqlite/) to manage data. Every Val Town account comes with a free SQLite database, hosted on [Turso](https://turso.tech/).\n\n## Structure\n\n* `schema.ts` - Drizzle ORM schema definitions (tables, columns, types)\n* `migrations.ts` - Database table creation logic\n* `queries.ts` - Query functions used by MCP tools\n* `db.ts` - Database connection configuration\n\n## Tables\n\nThe starter includes a `messages` table for storing message board data:\n\n```typescript\nexport const messages = sqliteTable(\"messages\", {\n id: integer(\"id\").primaryKey({ autoIncrement: true }),\n content: text(\"content\").notNull(),\n timestamp: text(\"timestamp\").notNull().default(new Date().toISOString()),\n});\n```\n\n## Migrations\n\nMigrations run automatically on startup via `createTables()` in `migrations.ts`, which is imported in `queries.ts`.\n\nThe migration logic uses `CREATE TABLE IF NOT EXISTS`, so it's safe to run on every startup. 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