Tools - Zod 4 + mastra still does not work
# 🖥│support-forumy
yairtheyair
10/30/2025, 9:30 AMDescription
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Uday
10/30/2025, 9:37 AMHey @yairtheyair, Could you provide some context regarding the issue you are facing and share a reproducible code snippet along with the exact error logs?
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yairtheyair
10/30/2025, 9:38 AMIt breaks my production right now so it's my focus for today.
I will share full code in half an hour but it's really just a mastra agent with latest zod latest mastra and latest composio and throws a parameters not defined error something like that
yairtheyair
10/30/2025, 11:33 AMyairtheyair
10/30/2025, 11:33 AMerror: TypeError: undefined is not an object (evaluating 'schema._zod.def')
yairtheyair
10/30/2025, 11:56 AMUPDATE: its vercel ai gateway bug, not on your side i think
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Akram Boussanni
10/30/2025, 12:13 PMI see, could you share your SDK versions and reproducible code snippet? It'll help us understand the issue.
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yairtheyair
10/30/2025, 3:36 PMUPDATE: it is a bug in composio actually. (there was not a bug in vercel ai gateway).
I downgraded from zod 4 to zod 3 and it all works.
yairtheyair
10/30/2025, 3:36 PMStill my prod is down (since my packages depend on zod 4 cant just downgrade zod).
Using composio latest + mastra latest + composio mastra provider latest
yairtheyair
10/30/2025, 3:54 PMAlso this, and i am NOT using vNext endpoints in my code, i updated to use the new ones without vNext
https://cdn.discordapp.com/attachments/1433387623765774387/1433484095987515442/image.png?ex=6904db99&is=69038a19&hm=5f5193c247678208366765568a69aebf7aa0c83a362210c8435baac5019d79a9&
yairtheyair
10/30/2025, 3:54 PMPLEASE advice
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abhishekpatil4
10/30/2025, 4:00 PMHi @yairtheyair,
Just jumping in here to help. We were unable to reproduce this issue on our end and would need additional details to troubleshoot the issue. Could you please create an issue on [GitHub](https://github.com/ComposioHQ/composio/issues/new?template=bug-report.yml) or share the same information here? We'll prioritize this to help get you back up!
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yairtheyair
10/30/2025, 4:04 PMFound the problem,
https://github.com/ComposioHQ/composio/blob/next/ts/packages/providers/mastra/src/index.ts#L96
These 2 lines of code,
I removed the jsonSchemaToZodSchema calls (just return parameters without jsonSchemaToZodSchema) and it work with zod 4.
Bottom line problem is at @composio/mastra latest provider
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abhishekpatil4
10/30/2025, 4:05 PMAh I see, thanks for debugging! Mind creating an issue on GitHub? We'll fix this on priority.
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yairtheyair
10/30/2025, 4:07 PMWill create it, will try to downgrade the composio mastra provider for now...
yairtheyair
10/30/2025, 4:10 PMhttps://github.com/ComposioHQ/composio/issues/2109 i think this is the same bug from 2 days ago
yairtheyair
10/30/2025, 4:17 PMalso i would really appreciate any ETA or notice when this will be fixed đź‘‘
yairtheyair
11/05/2025, 7:29 PMstill crashes
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Akram Boussanni
11/06/2025, 6:22 AMthanks for mentioning, i've shared this with team and we'll check this issue and update on the issue.