Can't use CapCut, he built an MCP video-editing server for Claude Code
wooing0306 · reddit · 2026-10-30
Over 3 months the author made 300 short videos with millions of views using Claude Code and Codex. First drafts were easy; iterative fixes were the pain, so he built Cutfac—a Mac app with a built-in MCP server. You drag over a few seconds, draw a box on what's wrong, type the change, and Claude Code or Codex does the edit.
Key MCP design points:
- When picking up a request (listopenfeedback), the agent gets just that clip, a frame with a red box, and a pre-edit copy—no guessing which caption.
- Each video is a plain folder with an item.yaml; the agent edits files and renders via local ffmpeg through a render tool.
- reviewmedia was the biggest win: agents must review a contact sheet plus 6 frames around every cut (where half-finished transitions show up), dim areas covered by TikTok/Reels UI in 9:16, then name and fix the 3 worst problems with timecodes.
- savevariant produces multiple versions that play side by side for keep/undo.
19 tools total; init writes .mcp.json for Claude Code and runs codex mcp add. No editing tools in the app on purpose. Runs on your own Claude/ChatGPT plan; Cutfac never sees your footage. Open source (AGPL-3.0), free to build yourself; signed app free for 3 videos then $29 once. Apple Silicon only. The author asks: hand the agent clips and marked frames up front, or let it pull frames itself?
Related event: Creator used Claude Code to make 300 viral short videos in 3 months(2 posts)→
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