The original title is "The project file is the interface: letting AI agents drive a video editor"

Short summary

FableCut is an open-source, MIT-licensed video editor where the entire timeline lives in a single JSON project file, letting AI agents manipulate edits directly without an API layer. The architecture uses file watching with SSE for real-time browser updates, a single integer revision for concurrency control, and a browser-based compositor that renders animated SVG overlays deterministically by pausing CSS animations and driving time manually. The project is zero-dependency and was built with Claude assisting on documentation.

• •Open-source video editor where JSON project file is the interface for AI agents
• •Uses SSE file-watching, integer revision concurrency, and deterministic browser-based SVG compositing
• •MIT licensed, zero dependencies, available on GitHub

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