Story Generator Skill (v1.3.0)

This skill allows an agent to design, generate, and composite a multi-scene storybook video using direct, native MCP tool calls. It implements a feedback-driven cognitive media engine. By combining upfront voiceover duration probing with dynamic video length selection, tempo clamping, and a dedicated quality-assurance audit ("The Editor's QC Room"), it guarantees studio-grade pacing and prevents typical AI audio-video desyncs.