HyperFrames renders HTML/CSS/seekable animations via headless Chrome (Puppeteer) and FFmpeg with no React build step. It ships agent skills for Claude Code, Cursor, and related harnesses, and is used in production at HeyGen. In the September 2026 LiveAvatar × GPT-Live demos, HyperFrames compositions also run live in the browser via @hyperframes/player as transparent UI overlays (vocab cards, poker table graphics) on top of the avatar stream.