Can't use zod v4
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- Dominant language
- TypeScript
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Description
Which project does this relate to?
Start
Describe the bug
If I try to use zod 4 in project I get errors when starting vite because router-generator and start-core relies on zod v3 api', the old z.function().returns, its now z.function({input: [], output:[]}).
Your Example Website or App
https://stackblitz.com/edit/github-9eq11eyj?file=package.json
Steps to Reproduce the Bug or Issue
npm install
npm run dev
Expected behavior
Server should start
Screenshots or Videos
Platform
- Router / Start Version: latest
- OS: macos
- Browser: all
- Browser Version: latest
- Bundler: vite
- Bundler Version: vite 7 and 8 beta
Additional context
I guess it's not possible to use zod v4 yet? otherwise get into weird issues where theres multiple versions of zod installed.
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Reproduce the failure with the linked StackBlitz project using npm install and npm run dev, then inspect the zod usage in router-generator and start-core. Done means the server starts with zod v4 without the reported API errors or problematic duplicate zod installations.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- typescript
- Domain
- build-system
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100