What problem does it solve? Drafting a post that works on LinkedIn, X, Instagram, Facebook, Threads, Bluesky, and Mastodon means juggling different character limits, truncation points, link placement rules, and hashtag conventions β and getting any of them wrong quietly kills reach or breaks the post. This Skill checks a draft against each platform's real constraints and returns a pass/warn/fix verdict per check, with corrected text supplied inline. ## Core Features & Use Cases - Deterministic linting: A bundled script computes platform-accurate character counts (X bills URLs at 23 and emoji at 2; Mastodon bills URLs at 23), truncation points, link counts, hashtag placement and casing, engagement bait, and formatting gotchas, outputting structured JSON verdicts. - Judgment-layer review: Beyond mechanics, it evaluates hook strength above the fold, media aspect ratios and alt text quality, first-comment link strategy, and brand voice rules from a social-context.md file. - Use Case: Before publishing a product announcement to X and LinkedIn, run the draft through the checker to discover it exceeds X's limit once URLs are billed at 23 characters, contains two links instead of one, and buries the hook below LinkedIn's 210-character fold β then copy the fully corrected drafts it returns. ## Quick Start Ask the assistant to check whether your draft works on a specific platform, for example: "Check if this draft works on LinkedIn and X."
