**cborg** is a high-performance CBOR (Concise Binary Object Representation) library for JavaScript that prioritizes strict, deterministic encoding. It's designed for developers who need reliable, byte-consistent data serialization, particularly in content-addressed systems or scenarios where data convergence is critical. The library supports both Node.js and browser environments, handles advanced JavaScript types like Maps, Sets, and TypedArrays, and provides extensive control over encoding/decoding behavior through customizable options and tags.