Update to BulkPublish

{
  "name": "media-preflight",
  "description": "Preflight social media images and videos against BulkPublish platform, post-type, size, format, aspect-ratio, and duration requirements before publishing.",
  "included_files": [],
  "skill_md_contents": "---\nname: media-preflight\ndescription: Preflight social media images and videos against BulkPublish platform, post-type, size, format, aspect-ratio, and duration requirements before publishing.\n---\n\n# Media Preflight\n\nCatch media and metadata problems before they create failed or partial social posts.\n\n## Checks\n\n1. Identify each target platform and intended post type.\n2. Confirm every required media item exists, is readable, and uses a supported format and size.\n3. Check platform-specific constraints such as Instagram video post types, TikTok/YouTube video requirements, Pinterest titles and boards, and carousel item counts.\n4. Check dimensions, aspect ratio, duration, number of files, caption length, and required `platformSpecific` fields.\n5. Report pass, warning, or blocking failure for each platform, with the exact correction needed.\n\nConsult `platform-reference` for the current BulkPublish requirements. Do not upload, create, schedule, or publish a post while a blocking preflight issue remains unless the user explicitly chooses to proceed.\n"
}