capnp‑ts is a TypeScript/JavaScript implementation of the Cap’n Proto serialization protocol. It provides a core library for reading and writing Cap’n Proto messages, plus compiler plugins (`capnpc‑ts` and `capnpc‑js`) that generate TypeScript or JavaScript code from `.capnp` schema files, targeting Node.js and (with bundlers) browser environments. The project is aimed at developers who want high‑performance binary serialization in TypeScript or plain JavaScript, especially those already using Cap’n Proto in other languages.