GitHub (MIT): https://github.com/danielcota/LoopMix128

Highlights:

* ~0.37 ns/value (GCC 11.4, -O3 -march=native), 98% faster than xoroshiro128++ and PCG64.

* Passes TestU01 BigCrush & PractRand (32TB).

* Guaranteed 2^128 period.

* Proven injective (192-bit state) via Z3 SMT solver; allows parallel streams.

* Core requires only stdint.h.

Seeking feedback on design, use cases, or further testing.