SyntaxError: writeGlobalTypes export missing from @vue/language-core breaks twoslash-vue integration

[kejvi-doko]

Describe the bug

When creating a new Slidev project using pnpm create slidev and attempting to start the dev server, the application fails to start with a module import error. The error indicates that twoslash-vue@0.3.4 is trying to import writeGlobalTypes from @vue/language-core, but this export does not exist in the installed version of @vue/language-core.

Minimal reproduction

Steps to reproduce the behavior:

1. Run pnpm create slidev
2. Enter project name (e.g., "pitch-deck")
3. When prompted to remove existing files, select "yes"
4. When prompted to install and start, select "yes"
5. Choose pnpm as the package manager
6. The dev server fails to start with the error below

You can use https://sli.dev/new to create a new project to reproduce the issue.

Error Details

file:///Users/kejvidoko/dev/byte-vision/pitch-deck/node_modules/.pnpm/twoslash-vue@0.3.4_typescript@5.9.3/node_modules/twoslash-vue/dist/index.mjs:1
import { defaultMapperFactory, CompilerOptionsResolver, writeGlobalTypes, createVueLanguagePlugin, createLanguage, FileMap } from '@vue/language-core';
                                                        ^^^^^^^^^^^^^^^^
SyntaxError: The requested module '@vue/language-core' does not provide an export named 'writeGlobalTypes'
    at #asyncInstantiate (node:internal/modules/esm/module_job:302:21)
    at process.processTicksAndRejections (node:internal/process/task_queues:103:5)
    at async ModuleJob.run (node:internal/modules/esm/module_job:405:5)
    at async onImport.tracePromise.__proto__ (node:internal/modules/esm/loader:654:26)
    at async Promise.all (index 2)
    at async getTwoslashTransformer (file:///Users/kejvidoko/dev/byte-vision/pitch-deck/node_modules/.pnpm/@slidev+cli@52.11.1_@babel+parser@7.28.5_@nuxt+kit@3.20.2_@types+markdown-it@14.1.2_@ty_2d3842277e856cbbfece37ba94ab0f42/node_modules/@slidev/cli/dist/shared-DgnE1q2H.mjs:1734:41)
    at async MarkdownItShiki (file:///Users/kejvidoko/dev/byte-vision/pitch-deck/node_modules/.pnpm/@slidev+cli@52.11.1_@babel+parser@7.28.5_@nuxt+kit@3.20.2_@types+markdown-it@14.1.2_@ty_2d3842277e856cbbfece37ba94ab0f42/node_modules/@slidev/cli/dist/shared-DgnE1q2H.mjs:1752:61)
    at async useMarkdownItPlugins (file:///Users/kejvidoko/dev/byte-vision/pitch-deck/node_modules/.pnpm/@slidev+cli@52.11.1_@babel+parser@7.28.5_@nuxt+kit@3.20.2_@types+markdown-it@14.1.2_@ty_2d3842277e856cbbfece37ba94ab0f42/node_modules/@slidev/cli/dist/shared-DgnE1q2H.mjs:1832:45)
    at async Object.markdownItSetup (file:///Users/kejvidoko/dev/byte-vision/pitch-deck/node_modules/.pnpm/@slidev+cli@52.11.1_@babel+parser@7.28.5_@nuxt+kit@3.20.2_@types+markdown-it@14.1.2_@ty_2d3842277e856cbbfece37ba94ab0f42/node_modules/@slidev/cli/dist/shared-DgnE1q2H.mjs:2225:4)
    at async file:///Users/kejvidoko/dev/byte-vision/pitch-deck/node_modules/.pnpm/unplugin-vue-markdown@29.2.0_vite@7.3.0_@types+node@22.19.3_jiti@2.6.1_yaml@2.8.2_/node_modules/unplugin-vue-markdown/dist/chunk-WO5APWOV.js:142:5

Node.js v25.2.1
 ELIFECYCLE  Command failed with exit code 1.

The error originates from:

• twoslash-vue@0.3.4 attempting to import writeGlobalTypes from @vue/language-core
• The import statement: import { defaultMapperFactory, CompilerOptionsResolver, writeGlobalTypes, createVueLanguagePlugin, createLanguage, FileMap } from '@vue/language-core';

Environment

• Slidev version: @slidev/cli@52.11.1
• Node.js version: v25.2.1
• Package manager: pnpm v10.22.0
• OS: macOS (darwin 25.2.0)
• Browser: N/A (error occurs before server starts)

Additional Context

• This is a fresh project created using the Slidev CLI
• The project uses the default seriph theme
• The error occurs during the module initialization phase, before the dev server can start
• This appears to be a dependency compatibility issue between twoslash-vue@0.3.4 and the resolved version of @vue/language-core

If you are using Slidev globally (i.e. npx slidev or npm i -g slidev), please try to reproduce the issue in a local project (i.e. npm create slidev@latest).

[kejvi-doko]

Root cause: writeGlobalTypes is deprecated in @vue/language-core@3.1.8 and may not be exported from the main entry point in ESM. The recommended replacement is createGlobalTypesWriter.

[kejvi-doko]

I think there is an open issue already twoslashes/twoslash#82

[kejvi-doko]

I have prepared a PR to resolve this issue twoslashes/twoslash#83

[Hu-Wentao]

note, user just add below code to package.json to quick fix error

{
  "pnpm": {
    "overrides": {
      "@vue/language-core": "3.1.7"
    }
  }
}