Mutative Middleware for Zustand

zustand-mutative is a middleware for Zustand that integrates the Mutative library, enabling efficient and convenient immutable state updates using a mutable syntax. It allows developers to modify Zustand state directly, similar to libraries like Immer, but claims significantly higher performance (2-6x faster than spread operations, over 10x faster than `zustand/middleware/immer`). The current stable version is 1.3.1. Releases appear to be driven by dependency updates and minor fixes, with new versions roughly every few months, often coinciding with updates to `mutative` or `zustand` itself. Its key differentiator is its performance advantage over other immutable update helpers within the Zustand ecosystem while providing a familiar mutable-style API for state management.