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jonathanhefnerclaude
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Use escaped double quotes in npm scripts for Windows compatibility
Single quotes in `concurrently` commands work on Unix shells but not on Windows Command Shell (`cmd.exe`), causing the `INPUT` environment variable to not be set and npm scripts to fail with errors like: 'cross-env' is not recognized as an internal or external command Error: INPUT environment variable is not set Replace single quotes with escaped double quotes (`\"`) in npm scripts in all example `package.json` files. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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‎docs/quickstart.md‎

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@@ -44,9 +44,12 @@ Configure your [`package.json`](https://github.com/modelcontextprotocol/ext-apps
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```bash
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npm pkg set type=module
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npm pkg set scripts.build="tsc --noEmit && tsc -p tsconfig.server.json && cross-env INPUT=mcp-app.html vite build"
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npm pkg set scripts.start="concurrently 'cross-env NODE_ENV=development INPUT=mcp-app.html vite build --watch' 'tsx watch main.ts'"
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npm pkg set scripts.start='concurrently "cross-env NODE_ENV=development INPUT=mcp-app.html vite build --watch" "tsx watch main.ts"'
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```
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> [!NOTE]
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> Windows `cmd.exe` users will need to convert quotes in the above command: `npm pkg set scripts.start="concurrently ""cross-env NODE_ENV=development INPUT=mcp-app.html vite build --watch"" ""tsx watch main.ts"""`.
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<details>
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<summary>Create <a href="https://github.com/modelcontextprotocol/ext-apps/blob/main/examples/quickstart/tsconfig.json"><code>tsconfig.json</code></a>:</summary>
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‎examples/basic-server-preact/package.json‎

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"watch": "cross-env INPUT=mcp-app.html vite build --watch",
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"serve": "bun --watch main.ts",
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"start": "cross-env NODE_ENV=development npm run build && npm run serve",
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"dev": "cross-env NODE_ENV=development concurrently 'npm run watch' 'npm run serve'",
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"dev": "cross-env NODE_ENV=development concurrently \"npm run watch\" \"npm run serve\"",
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"prepublishOnly": "npm run build"
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},
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"dependencies": {

‎examples/basic-server-react/package.json‎

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"watch": "cross-env INPUT=mcp-app.html vite build --watch",
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"serve": "bun --watch main.ts",
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"start": "cross-env NODE_ENV=development npm run build && npm run serve",
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"dev": "cross-env NODE_ENV=development concurrently 'npm run watch' 'npm run serve'",
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"dev": "cross-env NODE_ENV=development concurrently \"npm run watch\" \"npm run serve\"",
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"prepublishOnly": "npm run build"
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},
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"dependencies": {

‎examples/basic-server-solid/package.json‎

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"watch": "cross-env INPUT=mcp-app.html vite build --watch",
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"serve": "bun --watch main.ts",
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"start": "cross-env NODE_ENV=development npm run build && npm run serve",
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"dev": "cross-env NODE_ENV=development concurrently 'npm run watch' 'npm run serve'",
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"dev": "cross-env NODE_ENV=development concurrently \"npm run watch\" \"npm run serve\"",
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"prepublishOnly": "npm run build"
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},
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"dependencies": {

‎examples/basic-server-svelte/package.json‎

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"watch": "cross-env INPUT=mcp-app.html vite build --watch",
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"serve": "bun --watch main.ts",
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"start": "cross-env NODE_ENV=development npm run build && npm run serve",
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"dev": "cross-env NODE_ENV=development concurrently 'npm run watch' 'npm run serve'",
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"dev": "cross-env NODE_ENV=development concurrently \"npm run watch\" \"npm run serve\"",
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"prepublishOnly": "npm run build"
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},
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"dependencies": {

‎examples/basic-server-vanillajs/package.json‎

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"watch": "cross-env INPUT=mcp-app.html vite build --watch",
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"serve": "bun --watch main.ts",
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"start": "cross-env NODE_ENV=development npm run build && npm run serve",
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"dev": "cross-env NODE_ENV=development concurrently 'npm run watch' 'npm run serve'",
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"dev": "cross-env NODE_ENV=development concurrently \"npm run watch\" \"npm run serve\"",
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"prepublishOnly": "npm run build"
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},
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"dependencies": {

‎examples/basic-server-vue/package.json‎

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"watch": "cross-env INPUT=mcp-app.html vite build --watch",
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"serve": "bun --watch main.ts",
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"start": "cross-env NODE_ENV=development npm run build && npm run serve",
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"dev": "cross-env NODE_ENV=development concurrently 'npm run watch' 'npm run serve'",
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"dev": "cross-env NODE_ENV=development concurrently \"npm run watch\" \"npm run serve\"",
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"prepublishOnly": "npm run build"
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},
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"dependencies": {

‎examples/budget-allocator-server/package.json‎

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"start": "npm run start:http",
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"start:http": "cross-env NODE_ENV=development npm run build && npm run serve:http",
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"start:stdio": "cross-env NODE_ENV=development npm run build && npm run serve:stdio",
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"dev": "cross-env NODE_ENV=development concurrently 'npm run watch' 'npm run serve:http'",
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"dev": "cross-env NODE_ENV=development concurrently \"npm run watch\" \"npm run serve:http\"",
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"prepublishOnly": "npm run build",
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"serve": "bun --watch main.ts"
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},

‎examples/cohort-heatmap-server/package.json‎

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"start": "npm run start:http",
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"start:http": "cross-env NODE_ENV=development npm run build && npm run serve:http",
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"start:stdio": "cross-env NODE_ENV=development npm run build && npm run serve:stdio",
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"dev": "cross-env NODE_ENV=development concurrently 'npm run watch' 'npm run serve:http'",
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"dev": "cross-env NODE_ENV=development concurrently \"npm run watch\" \"npm run serve:http\"",
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"prepublishOnly": "npm run build",
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"serve": "bun --watch main.ts"
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},

‎examples/customer-segmentation-server/package.json‎

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"start": "npm run start:http",
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"start:http": "cross-env NODE_ENV=development npm run build && npm run serve:http",
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"start:stdio": "cross-env NODE_ENV=development npm run build && npm run serve:stdio",
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"dev": "cross-env NODE_ENV=development concurrently 'npm run watch' 'npm run serve:http'",
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"dev": "cross-env NODE_ENV=development concurrently \"npm run watch\" \"npm run serve:http\"",
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"prepublishOnly": "npm run build",
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"serve": "bun --watch main.ts"
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},

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