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# AI content repurposing agent powered by Vercel's AI SDK & AI Gateway

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Raj (@rajoninternet) · 2026-01-25 · ♥ 1

I recently shipped Casto, an AI content repurposing agent powered by Vercel's AI SDK & AI Gateway

Template : [https://v0.link/GNI3Yhn](https://t.co/JqNxwVljuF)


![Screenshot 2026-01-19 110953|690x448](upload://qwZjAlMtCuNZGlgqFED0c6IiqSn.png)

The problem it solves:

Content creators spend hours adapting their content for different platforms. Each platform has unique requirements - character limits, tone, formatting, audience expectations.

The solution:

Casto takes your blog content and automatically generates platform-optimized versions for X, LinkedIn, newsletters, and Reddit.

But here's what makes it different from other AI tools:

It's not just a prompt wrapper. It runs a genuine 4-step agentic workflow:

1. ANALYZE - Understands your content's intent, tone, and target audience

2. WRITE - Generates platform-specific content following best practices

3. EVALUATE - Automatically checks quality and identifies improvements

4. REFINE - Polishes the content based on evaluation feedback

You can watch the AI "think" in real-time through the chain-of-thought visualization.

Tech Stack:

- Built entirely with v0 by Vercel

- Vercel AI SDK for the agentic pipeline

- Supabase for authentication and database

- Next.js 15 with App Router

- X API integration for engagement tracking


The entire project - from UI to backend to database - was built in v0's canvas environment.

Clean base, easy to extend, meant for experimenting with agent-first flows. Use it as-is or build on top of it.