Developer builds AI tool to reformat one idea for Twitter, LinkedIn, and Reddit

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A developer created Cast Wide, an AI-powered tool that rewrites a single idea into platform-appropriate content for Twitter, LinkedIn, and Reddit — adjusting tone, structure, and style for each. The project was built as an entry for the AWS x Vercel H0 Hackathon. The application uses Next.js on the frontend, deploys via Vercel, and sends simultaneous requests to the Groq API using Promise.all to generate all three outputs quickly. User submissions and generated content are stored in AWS DynamoDB, with records indexed by user ID and timestamp for easy history retrieval. The developer noted the biggest challenge was ensuring outputs felt genuinely distinct per platform, which was resolved by fully separating the prompts for each social network.

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