modelcontextprotocol / modelcontextprotocol/ext-apps

fresh install of basic-host example fails

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bug
Dominant language
TypeScript
Stars
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Forks
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Avg merge
3h 21m
Merged PRs (30d)
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Description

Describe the bug
When getting started with the basic-host example, the generate-schemas script fails due to the package ts-to-zod not being installed.

To Reproduce
Steps to reproduce the behavior:

  1. clone this repo
  2. run cd ext-apps/examples/basic-host
  3. run npm install

Logs

> tsx scripts/generate-schemas.ts && prettier --write "src/generated/**/*"


node:internal/modules/run_main:104
    triggerUncaughtException(
    ^
Error [ERR_MODULE_NOT_FOUND]: Cannot find package 'ts-to-zod' imported from /Users/sam/Developer/ext-apps/scripts/generate-schemas.ts
    at Object.getPackageJSONURL (node:internal/modules/package_json_reader:267:9)
    at packageResolve (node:internal/modules/esm/resolve:768:81)
    at moduleResolve (node:internal/modules/esm/resolve:854:18)
    at defaultResolve (node:internal/modules/esm/resolve:984:11)
    at nextResolve (node:internal/modules/esm/hooks:748:28)
    at resolveBase (file:///Users/sam/Developer/ext-apps/node_modules/tsx/dist/esm/index.mjs?1781172307493:2:3744)
    at resolveDirectory (file:///Users/sam/Developer/ext-apps/node_modules/tsx/dist/esm/index.mjs?1781172307493:2:4243)
    at resolveTsPaths (file:///Users/sam/Developer/ext-apps/node_modules/tsx/dist/esm/index.mjs?1781172307493:2:4984)
    at resolve (file:///Users/sam/Developer/ext-apps/node_modules/tsx/dist/esm/index.mjs?1781172307493:2:5361)
    at nextResolve (node:internal/modules/esm/hooks:748:28) {
  code: 'ERR_MODULE_NOT_FOUND'
}

Node.js v23.11.0
npm error code 1
npm error path /ext-apps
npm error command failed
npm error command sh -c npm run build && husky

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start in ext-apps/examples/basic-host by running npm install and inspect the generate-schemas.ts entry point referenced in the error. Verify that a fresh install provides ts-to-zod and that the generate-schemas command and subsequent build complete successfully.

Written by the indexing model from the issue text.

Assessment

Tech stack
typescript
Domain
build-system
Issue type
Bug
Difficulty
2/5
Estimated time
1-3 hours
Activity status
Quiet
Clarity
Clearly specified
Newbie friendliness
78/100

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