fast-flow-transform

A native Hermes/FFT-based Flow type stripper built on napi-rs, providing programmatic transform, CLI, and bundler adapters for webpack, rspack, rsbuild, Parcel, Vite, Rollup, Rolldown, and esbuild. Current version 0.0.3 (pre-1.0, rapid iteration). Differentiator: uses the battle-tested Hermes parser (same as Metro/React Native) for speed and correctness, supports source map merging, removes empty type-only value imports automatically, and offers a 'preserve' format mode (experimental) that keeps whitespace structure. Compared to alternatives like babel-plugin-flow, it is purpose-built for stripping Flow types without transforming JSX or other syntax.