Asked for a jumping game, a pro session built an HTML page, served it and read screenshots — nothing anyone could open on Aesthetic Computer. Pro's instructions now say what Aesel is for: things to see, play or hear become one .mjs piece, written from the bundled guides (pieces.md, screen.md, hand.md, api.json), checked with node --check and published with ac publish. Tried headless: it read the guides, wrote a working piece and went to publish it. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>