DEFAULT CHOICE for user posts. Get user posts anonymously via logged-out GraphQL persisted query (PolarisProfilePostsQuery + lsd token, no account cookie needed). Pass username. Returns full post data with image_versions2 (image CDN URLs), video_versions (video CDN URLs), like/comment counts, caption, user snapshot (username/full_name/profile_pic). Supports end_cursor pagination (server hard cap ~33 posts per request). Built-in doc_id hot-refresh (weekly JS bundle extraction) + failover auto-switch. Use /user/posts3 (login required) only as fallback when anonymous IP quota exhausted (401). Replaces deprecated /user/posts2. Recommended: residential sticky-session proxy.