Savannah is an animation system for Claude. Paste it into claude.ai and type “install Savannah.” Claude becomes an animation studio that takes a description and returns a video file.
Two distinct phases. Phase 1 is design. The model produces a complete animation blueprint: frame descriptions, motion paths, timing curves, transitions, color palettes. Pure description, no pixels. Phase 2 is execution. The model renders every frame, then pipes them to ffmpeg. The output is a video file. 24fps minimum. Every frame is code.
There is no video model in the loop. Every frame is reproducible. The model designs motion with intent and renders it with math. The output is deterministic: run the same code, get the same video.