Kaitai Struct is an umbrella project that provides a declarative language for describing binary data structures and a compiler to generate parser code in multiple target languages. The repository coordinates submodules for the compiler, runtimes for various languages (Java, Python, Ruby, etc.), format definitions, visualizer, tests, benchmarks, and documentation. Users describe a format in a .ksy file, compile it with the kaitai-struct-compiler to generate language-specific parser code, and use the corresponding runtime to parse binary data. The project includes CI workflows for building the compiler and publishing artifacts, and maintains a collection of ready-to-use format descriptions.