Scroll Promo Site Builder

Build a complete local product-promo site whose desktop scroll position controls a continuous cinematic video. Generate image assets directly with image2.0 and video assets directly with Seedance 2.0. Keep the workflow portable across Agent Skills implementations.

Positioning and attribution

This skill is positioned as a production workflow for cinematic motion websites: it turns product strategy, visual assets, generated video, scroll interaction, review, and local handoff into one repeatable process.

Its scroll-scrubbing, rendered-boundary-frame, connector, and short-GOP media workflow was developed with reference to oso95/scroll-world, which is available under the MIT License. This package is a separate React-based implementation with a stricter direct-model contract, product-story phase gates, a single reviewed web-video timeline, static mobile fallback, and local delivery tooling. See THIRD_PARTY_NOTICES.md for the upstream copyright and license text.

Non-negotiable model contract

• Invoke image2.0 directly for character sheets, equipment sheets, key visuals, first frames, and required last frames.
• Invoke Seedance 2.0 directly for scene clips and connector clips.
• Do not route either model through another creative platform, canvas system, or intermediary workflow.
• Do not silently substitute another image or video model.
• Discover callable tools by their capability descriptions rather than assuming identical tool names across agents.
• If either required model is unavailable, finish the prompt and input manifest for that generation step, report the missing capability, and stop that phase.
• Save every returned image or video into the project and update the asset manifest immediately.