Short version
- A genjutsu skill is a small instruction pack for Claude or Claude Code that teaches the agent to write Genjutsu motion-transfer and object-swap prompts in the right format.
- It does not render video. Renders still happen in the Genjutsu web app - the skill removes prompt friction, not the rendering step.
- Installing one takes about 30 seconds: a skill is a folder with a SKILL.md file, and Claude picks it up from your skills directory.
