numpy-ts

This is actually low-key a big deal. NumPy is the backbone of basically every numerical computing stack in Python, and getting 94% API coverage with type safety and tree-shakeable bundles means you can finally do that math-heavy work in TypeScript without cobbling together a frankenstein workflow or losing your mind over runtime type errors. Validating against 6,000+ tests is the kind of rigor that separates real implementations from half-baked ports, so if you've been forced to keep a Python service alive just for the NumPy dependency, this is the move worth investigating.