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OxiProto is the COOLJAPAN Pure-Rust Protocol Buffers stack — a native .proto parser, codegen, and wire runtime that replaces the protoc C++ compiler. No protoc binary, no build-time C++, no -sys crates. Proto2 + proto3, multi-file imports, reflection, JSON, and a CLI, all part of the NoFFI sovereign Rust stack.
100% binary-compatible drop-in replacement for bincode with zero-copy decoding, SIMD-accelerated arrays (2–4× faster), built-in LZ4/Zstd compression (powered by OxiARC), CRC32 checksums, async streaming, schema evolution, and no_std support. 513k LOC of pure Rust, 19,927 passing tests. The sovereign serialization layer for SciRS2 and the entire COOLJAPAN ecosystem.