Developer Builds Claude-Powered Plugin to Auto-Generate Demo Videos Without Editing

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A developer has built a plugin that uses Claude AI in plan mode to automatically create polished demo videos for software projects, eliminating the need for manual video editing. The system combines Node.js scripts, a Remotion rendering template, and a small MCP server, with integrations for fal.ai and ElevenLabs to handle AI narration, lip-synced avatars, and sound effects. To avoid dead air from slow AI interactions, the tool uses a two-pass approach: Claude first rehearses app navigation to generate a verified action script, then a separate deterministic runner replays it with natural cursor motion while recording. Narration audio is generated before any screen capture begins, allowing word-level timestamps to synchronise clicks, captions, and avatar lip-sync to the exact spoken word. All project state is stored in a single demo.json manifest, and assets are cached by input hash so only changed components are regenerated on subsequent runs.

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