fix(examples): resolve DIST_DIR path for npm package execution

[ochafik]

Summary

• Fixes ENOENT: no such file or directory errors when running servers from npm packages
• Fixes pdfjs-dist worker file not found error in pdf-server

Changes

1. DIST_DIR path resolution

When servers are compiled to dist/server.js and run via npx, import.meta.dirname already points to dist/, causing path.join(import.meta.dirname, "dist") to resolve to dist/dist/ which doesn't exist.

Updated all 20 example servers to detect whether running from TypeScript source or compiled JavaScript:

// Works both from source (server.ts) and compiled (dist/server.js)
const DIST_DIR = import.meta.filename.endsWith(".ts")
  ? path.join(import.meta.dirname, "dist")
  : import.meta.dirname;

2. pdf-server pdfjs-dist bundling fix

The pdf.worker.mjs file wasn't found when running from npm because bun bundled pdfjs-dist but didn't include the worker file.

By marking pdfjs-dist as external in the build, it uses the installed package from node_modules at runtime where the worker is available:

bun build server.ts --outdir dist --target node --external pdfjs-dist

Test plan

• Build passes (npm run build:all)
• E2E tests pass
• Tested in a host + checked importing from another server works

🤖 Generated with Claude Code

[pkg-pr-new]

Open in StackBlitz

@modelcontextprotocol/ext-apps

npm i https://pkg.pr.new/modelcontextprotocol/ext-apps/@modelcontextprotocol/ext-apps@277

@modelcontextprotocol/server-basic-react

npm i https://pkg.pr.new/modelcontextprotocol/ext-apps/@modelcontextprotocol/server-basic-react@277

@modelcontextprotocol/server-basic-vanillajs

npm i https://pkg.pr.new/modelcontextprotocol/ext-apps/@modelcontextprotocol/server-basic-vanillajs@277

@modelcontextprotocol/server-budget-allocator

npm i https://pkg.pr.new/modelcontextprotocol/ext-apps/@modelcontextprotocol/server-budget-allocator@277

@modelcontextprotocol/server-cohort-heatmap

npm i https://pkg.pr.new/modelcontextprotocol/ext-apps/@modelcontextprotocol/server-cohort-heatmap@277

@modelcontextprotocol/server-customer-segmentation

npm i https://pkg.pr.new/modelcontextprotocol/ext-apps/@modelcontextprotocol/server-customer-segmentation@277

@modelcontextprotocol/server-map

npm i https://pkg.pr.new/modelcontextprotocol/ext-apps/@modelcontextprotocol/server-map@277

@modelcontextprotocol/server-pdf

npm i https://pkg.pr.new/modelcontextprotocol/ext-apps/@modelcontextprotocol/server-pdf@277

@modelcontextprotocol/server-scenario-modeler

npm i https://pkg.pr.new/modelcontextprotocol/ext-apps/@modelcontextprotocol/server-scenario-modeler@277

@modelcontextprotocol/server-shadertoy

npm i https://pkg.pr.new/modelcontextprotocol/ext-apps/@modelcontextprotocol/server-shadertoy@277

@modelcontextprotocol/server-sheet-music

npm i https://pkg.pr.new/modelcontextprotocol/ext-apps/@modelcontextprotocol/server-sheet-music@277

@modelcontextprotocol/server-system-monitor

npm i https://pkg.pr.new/modelcontextprotocol/ext-apps/@modelcontextprotocol/server-system-monitor@277

@modelcontextprotocol/server-threejs

npm i https://pkg.pr.new/modelcontextprotocol/ext-apps/@modelcontextprotocol/server-threejs@277

@modelcontextprotocol/server-transcript

npm i https://pkg.pr.new/modelcontextprotocol/ext-apps/@modelcontextprotocol/server-transcript@277

@modelcontextprotocol/server-video-resource

npm i https://pkg.pr.new/modelcontextprotocol/ext-apps/@modelcontextprotocol/server-video-resource@277

@modelcontextprotocol/server-wiki-explorer

npm i https://pkg.pr.new/modelcontextprotocol/ext-apps/@modelcontextprotocol/server-wiki-explorer@277

commit: f5fb4d8

[ochafik]

config.json:

{
  "mcpServers": {
    "basic-react": {
      "command": "npx",
      "args": ["-y", "https://pkg.pr.new/modelcontextprotocol/ext-apps/@modelcontextprotocol/server-basic-react@277", "--stdio"]
    },
    "basic-vanillajs": {
      "command": "npx",
      "args": ["-y", "https://pkg.pr.new/modelcontextprotocol/ext-apps/@modelcontextprotocol/server-basic-vanillajs@277", "--stdio"]
    },
    "budget-allocator": {
      "command": "npx",
      "args": ["-y", "https://pkg.pr.new/modelcontextprotocol/ext-apps/@modelcontextprotocol/server-budget-allocator@277", "--stdio"]
    },
    "cohort-heatmap": {
      "command": "npx",
      "args": ["-y", "https://pkg.pr.new/modelcontextprotocol/ext-apps/@modelcontextprotocol/server-cohort-heatmap@277", "--stdio"]
    },
    "customer-segmentation": {
      "command": "npx",
      "args": ["-y", "https://pkg.pr.new/modelcontextprotocol/ext-apps/@modelcontextprotocol/server-customer-segmentation@277", "--stdio"]
    },
    "map": {
      "command": "npx",
      "args": ["-y", "https://pkg.pr.new/modelcontextprotocol/ext-apps/@modelcontextprotocol/server-map@277", "--stdio"]
    },
    "pdf": {
      "command": "npx",
      "args": ["-y", "https://pkg.pr.new/modelcontextprotocol/ext-apps/@modelcontextprotocol/server-pdf@277", "--stdio"]
    },
    "scenario-modeler": {
      "command": "npx",
      "args": ["-y", "https://pkg.pr.new/modelcontextprotocol/ext-apps/@modelcontextprotocol/server-scenario-modeler@277", "--stdio"]
    },
    "shadertoy": {
      "command": "npx",
      "args": ["-y", "https://pkg.pr.new/modelcontextprotocol/ext-apps/@modelcontextprotocol/server-shadertoy@277", "--stdio"]
    },
    "sheet-music": {
      "command": "npx",
      "args": ["-y", "https://pkg.pr.new/modelcontextprotocol/ext-apps/@modelcontextprotocol/server-sheet-music@277", "--stdio"]
    },
    "system-monitor": {
      "command": "npx",
      "args": ["-y", "https://pkg.pr.new/modelcontextprotocol/ext-apps/@modelcontextprotocol/server-system-monitor@277", "--stdio"]
    },
    "threejs": {
      "command": "npx",
      "args": ["-y", "https://pkg.pr.new/modelcontextprotocol/ext-apps/@modelcontextprotocol/server-threejs@277", "--stdio"]
    },
    "transcript": {
      "command": "npx",
      "args": ["-y", "https://pkg.pr.new/modelcontextprotocol/ext-apps/@modelcontextprotocol/server-transcript@277", "--stdio"]
    },
    "video-resource": {
      "command": "npx",
      "args": ["-y", "https://pkg.pr.new/modelcontextprotocol/ext-apps/@modelcontextprotocol/server-video-resource@277", "--stdio"]
    },
    "wiki-explorer": {
      "command": "npx",
      "args": ["-y", "https://pkg.pr.new/modelcontextprotocol/ext-apps/@modelcontextprotocol/server-wiki-explorer@277", "--stdio"]
    }
  }
}