Singeli: High-level interface for low-level programming

Singeli is a domain-specific language for writing high-performance, SIMD-capable algorithms using flexible compile-time abstractions over CPU instructions. Built on BQN and compiling to C, its core feature is a powerful generator system — similar to C++ templates but more expressive — enabling Turing-complete metaprogramming. With 5k lines in production use, it's considered stable and includes tooling like an interactive playground and LSP support.