Abstract: The various implementations described herein include methods, devices, and systems for providing and editing audiovisual effects. In one aspect, a method is performed at a first device having one or more processors and memory. The method includes: (1) presenting a user interface for effects development, including a specification for an effect in development; (2) displaying on a display device the effect applied to a video stream; (3) while displaying the effect applied to the video stream, receiving within the user interface one or more updates to the specification; (4) compiling the updated specification in real-time; and (5) displaying on the display device an updated effect applied to the video stream, the updated effect corresponding to the updated specification.