CoPilot is a domain-specific, embedded-stream language for generating hard real-time C code for monitors. Copilot is a runtime verification framework written in Haskell. It allows the user to write programs in a simple but powerful way using a stream-based approach.

Programs can be interpreted for testing, or translated into C99 code to be incorporated in a project or as a standalone application. The C99 backend output is constant in memory and time, making it suitable for systems with hard realtime requirements.