This repository is the official specification collection for the BNB Chain ecosystem, containing over 100 BEPs (BNB Chain Evolution Proposals) and a handful of BAPs (BNB Application Proposals). It is not a software application but a standards body: BEPs define protocol-level changes (hard forks, precompiles, consensus modifications) for BNB Beacon Chain, BNB Smart Chain, opBNB, and Greenfield, while BAPs define application-layer standards (token interfaces, agent lifecycle protocols). The repository is dominated by markdown documents following a strict template (preamble, summary, specification, rationale, backwards compatibility) and includes supporting assets such as test vectors (BLS12-381 JSON files), benchmark results, architecture diagrams, and formal JSON schemas. Many BEPs are direct ports of Ethereum EIPs adapted to BSC. The codebase is well-organized and actively maintained, but it is purely a specification repository with no executable code, making it a reference for developers implementing BNB Chain clients rather than a reusable software library.