Generate platform-specific social media captions (Reddit, Facebook, LinkedIn, YouTube, X, Threads, Instagram, TikTok) from raw post details, notes, or draft content. Defaults to all eight platforms when none is named. Use whenever the user gives post, video, project, product, or announcement details and wants captions. If the user names specific platforms, generate only those. Preserves every user-supplied fact, enforces exact character limits by running a length check, applies fixed hashtag ranges per platform, and judges whether content suits Reddit before forcing a Reddit post.
