video-add-content-cardslisted

# Video Add Content Cards Turn approved semantic moments into one coherent HyperFrames graphics overlay. Use shared evidence and the canonical timeline; do not re-transcribe or re-analyze the source inside this skill. ## Dependencies `/video-understand` is a prerequisite. Run it first so cards use validated semantic evidence and the canonical timeline. Before starting, verify that it is installed. If it is not, warn the user that this prerequisite is missing and stop before processing media. Require `ffmpeg` on PATH, Python, and Node.js >= 22 (for `npx hyperframes`, fetched on demand). `hyperframes render`/`snapshot` drives a headless Chrome — it manages its own `chrome-headless-shell`, and falls back to a system Chrome (set `CHROME` to override) when the cached one is unusable. Check these before processing media. ## Inputs - `work/project.json`: operation revisions and dependencies - `work/understand/understanding.json`: reviewed semantic moments and evidence - `work/timeline.json`: source-to-program mapping, or an identity timeline when no cut exists - optional selected color-grade revision when contrast or palette is judged against that look The skill is valid without a cut or color grade. Declare only dependencies actually consumed and record their current revisions in `based_on`. ## Working Files ```text work/content-cards/cards-plan.json # durable editorial plan work/cache/content-cards/index.html # code-is-the-edit composition work/cache/cont