AI agents can’t click around Premiere. They can write HTML in their sleep. HeyGen’s answer: stop teaching agents to edit video, make video something you write. HyperFrames, its open-source rendering engine, added 734 stars in a single day and now sits at 45K, Apache 2.0.
A video is just an index.html
The whole trick fits in one sentence: every element in your HTML is a clip, data-start and data-duration attributes define the timeline, headless Chrome seeks each frame, FFmpeg encodes the MP4. Same input, same video, every time — deterministic enough for CI. GSAP, CSS keyframes, Lottie, and Three.js all work, as long as animations are seek-safe.
Built to be driven by agents, not humans
This is where the AI part lives. HyperFrames ships 20 skills for Claude Code, Cursor, Codex, and Gemini CLI, covering composition, animation, audio, and creative direction. The CLI does init, preview, render, lint, plus cloud rendering on Lambda. Typical loop: an agent writes the HTML, lints it, renders the MP4 — product demos and social clips with no editor open. Video as code is the new pipeline for agent-made content, and HeyGen just gave it away.
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