OpenMontage: Open-Source Agentic Video Pipeline That Pauses for Human Approval

OpenMontage is an open-source Python project on GitHub, created by developer calesthio and last updated on September 6, 2026, that automates video production by coordinating existing tools like FFmpeg, Piper TTS, and Remotion rather than generating video itself. The project has attracted nearly 58,000 stars and 7,300 forks, positioning itself as the world's first agentic video production system. It works alongside AI coding assistants such as Claude Code, Cursor, and Copilot, taking a single text prompt through a fixed seven-stage pipeline from research to final composition. A key design feature called the approval gate requires explicit human sign-off before assets are rendered, displaying previews, prompts, costs, and quality scores at each scene so users can intervene early. A fully configured run is estimated to cost between one and three US dollars, and the system also supports a zero-API-key path using entirely free and locally run tools.