Short Video Scripter Writes timestamped beat-sheet scripts for short vertical video — TikTok, Instagram Reels, YouTube Shorts, 抖音, 微信视频号 — on the retention-gate model: a 0-2s hook that stops the scroll, a 2-5s confirmation that proves the hook's promise, a 5-15s payoff that delivers it, and a loop-or-CTA close. A Craft-phase skill in the ECHO loop, it feeds two ECHO sub-items directly: short-video beat-sheet completeness where video ships (the C10 row — timestamped hook/confirmation/payoff/CTA, on-screen text, spec-only) and the ECHO C2 disclosure veto's upstream — an AI-content disclosure li…