What problem does it solve? Creating deterministic, re-renderable motion graphics (kinetic typography, quote cards, data-viz reels) requires a repeatable authoring process; this Skill defines the rules for writing HTML compositions that the HyperFrames renderer converts frame-accurately into MP4 video. ## Core Features & Use Cases - HTML-as-source compositions: Authors plain HTML files with data-start, data-duration, and data-track-index attributes, animated with paused GSAP timelines registered on window.__timelines. - Parametrized re-rendering: Declares variables via data-composition-variables so the same composition re-renders with new values (e.g., a weekly KPI reel with updated numbers). - Validation workflow: Enforces npx hyperframes lint and npx hyperframes inspect before rendering, and emits a manifest.json alongside the MP4 output. - Use Case: A marketing team needs a 12-second 9:16 weekly KPI reel; the Skill authors the composition with declared numeric variables, validates it, and produces render arguments so the same layout re-renders each week with fresh metrics. ## Quick Start Ask the agent to author a HyperFrames composition for a 9:16 motion quote card with a given composition ID, duration, and scene list, using the active client's design tokens.