The project file is the interface: letting AI agents drive a video editor
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Open-source video editor with AI agent interface is novel and directly relevant to AI agent orchestration.
FableCut, an open-source browser-based video editor, treats its project.json file as the primary interface, enabling AI agents to edit video by writing JSON directly rather than through an API. The editor uses SSE only as a lightweight change notification, with the browser re-fetching the full project on each update, and implements a revision counter for concurrency control that rejects stale writes with a 409. Frame-accurate CSS animations are achieved by pausing animations and driving time via negative animation-delay values, ensuring deterministic preview and export.