Reco used the test-suite-driven AI coding methodology (popularized by Cloudflare's Next.js/Vite rewrite) to replace their JavaScript JSONata RPC pods with a pure-Go implementation called gnata. Seven hours and $400 in tokens yielded a 1,000x speedup on common expressions and eliminated their cross-language RPC overhead, ultimately saving $500K/year on infrastructure. A concrete, high-signal case study for the "spec+tests → AI implements" agentic coding pattern at production scale.
Infrastructure
We rewrote JSONata with AI in a day, saved $500k/year
Reco rewrote JSONata from JavaScript to Go using test-suite-driven AI in 7 hours for $400, achieving 1000x speedup and $500k annual infrastructure savings.
Friday, March 27, 2026 12:00 PM UTC2 MIN READSOURCE: Hacker NewsBY sys://pipeline
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infrastructure