I asked Claude Code to make me a stick-fight series. It ended up writing its own QA system that rejects bad choreography before rendering

This is the pilot (SIM #000) of a short-form series I'm making with Claude Code: a black stickman with red eyes — a digital copy of my brain — trapped in AI-run simulations, one per song. No video model is involved. Everything is code that Claude wrote and iterated on: \- Motion: \~1000 Mixamo mocap clips converted to 2D bone angles; Claude plans every move on the beat (blocks, throws, takedowns, gun-fu, a boss that beats the hero down until he rises on the loudest bar). \- Physics: planck.js ragdolls for the dead, liquid blood with an SVG goo filter. \- Render: deterministic, frame by frame, in headless Chrome via Playwright. The part I didn't expect: every time I pointed out a flaw ("he punches the air", "the boss just stands there AFK", "same move twice in a row", "blood appears from nowhere"), Claude didn't just patch that shot — it added a rule to a validator that walks the whole plan frame by frame. It now checks \~30 things: hits landing too far from the body, the hero…