How to Build an AI Code Rewriter That Saves $500K/Year — Full API Tutorial

How to Build an AI Code Rewriter That Saves $500K/Year — Full API Tutorial A team just rewrote JSONata with AI in a single day and saved $500K/year. The HackerNews community is buzzing. Here's what this means for developers — and how you can build the same kind of AI-powered code transformation tool using NexaAPI. The Story That's Got HackerNews Talking Reco.ai's engineering team faced a problem: they were paying $500K/year in licensing fees for JSONata, a JSON query/transformation library. Their solution? Use AI to rewrite the entire library in a single day. The result: a fully functional, open-source replacement — built with AI assistance, zero licensing costs, and shipped in 24 hours. The HackerNews thread exploded. Developers are asking: "How do I do this for MY codebase?" This article answers that question — with working code. What This Actually Means for Developers The JSONata rewrite story isn't just about one company saving money. It's a signal that: AI can handle complex code