What problem does it solve? Social platform rules change constantly, and teams often draft posts against stale or folklore-based assumptions about character limits, visible-fold cutoffs, hashtag norms, and link placement. This Skill keeps a single versioned pack of per-platform norm cards where every row is labeled as platform-documented or estimated-folklore, with last-verified and review-by dates, and flags any card past its review date as stale rather than trusted. ## Core Features & Use Cases - Dated norm cards: Builds or refreshes organic-engagement sections for platforms like LinkedIn, TikTok, Reddit, YouTube, 小红书, WeChat, Threads, and more, covering char limits, fold cutoffs, format specs, disclosure labels, and algorithm emphases. - Evidence labeling: Every row is marked platform-documented (official doc URL plus retrieval date) or Estimated-folklore (named source), so unverified claims never become scored rules. - Staleness sweeps: Flags any card past its review-by date so downstream drafting never cites outdated specs. - Use Case: Before drafting a LinkedIn post, ask whether the link-in-first-comment norm is documented or folklore; the Skill verifies it against official docs, updates the card with a named source and fresh dates, and reports what remains unverified. ## Quick Start Build the organic-engagement section of the 小红书 norm card with char limits, fold cutoffs, hashtag norms, and algorithm emphases, labeling and dating every row.