agentic-design-threejs
Default activation owner: agentic-prototype-trigger.
Use only when the trigger includes this skill in design_skill_palette.activated[].
Outputs must be design constraints, rationale, or checks that the agentic-design-frontend-design producer can apply to the staged prototype bundle. Do not write canonical prototype artifacts, manifest, asset-index, phase metadata, Git commits, or host-local absolute paths.