---
title: "Discussion on \"AI coding agents still write your SDK's old API — so I built a type-checker to measure it\" | Hashnode"
description: "Discussion on \"AI coding agents still write your SDK's old API — so I built a type-checker to measure it\". Here's a bug I kept hitting. I'd ask an AI assistant to write some code against a library — Prisma, the Vercel AI SDK, Zod — and the code would look completely right. Clean, idiomatic, exactly the sha"
url: "https://hashnode.com/posts/ai-coding-agents-still-write-your-sdk-s-old-api-so-i-built-a-type-checker-to-measure-it/6a5ef7ea7f4c78fb29a0f71d"
---

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# [AI coding agents still write your SDK's old API — so I built a type-checker to measure it](https://kalpitrathore.hashnode.dev/ai-coding-agents-still-write-your-sdk-s-old-api-so-i-built-a-type-checker-to-measure-it?utm_source=hashnode&utm_medium=feed)

Here's a bug I kept hitting. I'd ask an AI assistant to write some code against a library — Prisma, the Vercel AI SDK, Zod — and the code would look completely right. Clean, idiomatic, exactly the sha

Jul 21 · 5 min read · kalpitrathore.hashnode.dev  
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## Written by

[Kalpit Rathore](https://hashnode.com/@Kalpitrathore)

@Kalpitrathore · India

  
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I make things magical using code

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