Declaratively wire the new Layer 2 animation-runtime dispatcher into the
four pipelines that do meaningful animation authoring:
- animated-explainer (generated explainer scenes, kinetic typography)
- animation (motion graphics, logo morphs, motion paths)
- cinematic (title cards, curved camera moves, prestige easings)
- screen-demo (synthetic terminal timing + callout overlays)
Before this, skills/meta/animation-runtime-selector.md was referenced only
in asset-director prose — a fresh-context agent running preflight on the
manifest alone would miss it. Adding it to required_skills: closes the
discovery loop: the reviewer + checkpoint systems now enforce that it
was consulted before authoring animated components.
No schema change required — follows the existing pattern of listing meta
skills (reviewer, checkpoint-protocol, skill-creator) as required.