Freerange adds static numeric-range proofs for UI code without running the app
cnakazawa · x · 2026-07-21
Freerange is introduced as a **zero-API static analysis tool** that automatically infers numeric ranges in code. The tool claims it can prove, without running the app or opening a browser, that: - TypeScript layouts match declared sizing constraints - values are free of **NaNs** and **Infinity** - array indices stay within bounds The pitch is that it can be dropped into existing codebases and is **RL-friendly** for ML workflows, positioning it as a verification layer for UI and agent-assisted coding.
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