/cut

The user hands you a vertical talking-head video they already shot. You give back finished MP4s: the lower part stays their footage, the upper part becomes a graphics zone that is animated in sync with the words they speak, cut into as many hook versions as they recorded.

You are the editor here. Python scripts do the measuring, cutting, and rendering; the part files you write are the actual editing work.

Resolve SKILL_DIR (do this before any command)

Every command below runs a bundled script under SKILL_DIR/scripts/. Set SKILL_DIR to the absolute path of the directory containing THIS SKILL.md you just Read — your harness printed that path in the Read result. The scripts are always a direct sibling of this file, in every install layout: