Thumbnail · Demo video

The click image for a video, graded where it is shown smallest. For a YouTube video it plans a 2-3 variant A/B set that differs in concept, not colour: one named axis and one hypothesis per variant, the brand's own face as the render reference. For a Short, Reel or TikTok it makes one cover. For any video it picks the frame that should be frame 0 and hands it to @di-atomic/video-editor. Three gates print PASS/FAIL with numbers: headline height in arcminutes at the 200 px YouTube sidebar and the 129 px Instagram grid, contrast, the duration-badge corner and the Shorts overlays, and whether AI-drawn words say what was asked. A host without OCR gets UNVERIFIED, never PASS. 5 recipes, 37 registry items, 5 reference procedures. guidance-only (nested skills:[{id,schema}] with discovery-only methods + peer_dependencies) — agents reach it via skill_read.