March 27, 2026via Simon Willison
We Rewrote JSONata with AI in a Day, Saved $500K/Year
Why it matters
This demonstrates AI's potential to dramatically accelerate enterprise software rewrites and maintenance, turning multi-month projects into single-day sprints with massive cost savings.
Key signals
- $500K/year cost savings
- Complete rewrite accomplished in 1 day
- JSONata codebase successfully ported using AI
The hook
$500K saved. In one day. Vine used AI to rewrite an entire codebase.
Relevance score:85/100