Composer

• First comment (per post or per destination) posts after the destination is verified live, as its own checkpointed stage. If it fails, the receipt is flagged and the parent is never re-posted. Supported on YouTube, Instagram, Facebook Pages, X and LinkedIn; TikTok has no comment API.
• Threads (parts) post each part as a reply to the previous one, with a receipt entry per part. A failed part flags the receipt and skips the remaining parts; the parent and earlier parts stay. Supported on X, Threads, Bluesky and Mastodon; other platforms reject parts loudly at validation.
• UTM fields (source, medium, campaign, term, content) are added to every link in the caption, parts and first comment at delivery time; workspace defaults sit under post and destination values.
• Link shortening uses your own Bitly or Dub key, stored encrypted. Without a key links pass through untouched and the receipt records it; a configured shortener that fails is flagged and the long link is used.
• Recycling republishes a post on a cadence (every N days, optionally N times) as fresh posts with their own receipts, into the account's queue or at the cadence instant. The same-asset guard applies to each instance.
• CSV import: columns caption, destinations, mode, scheduled_at, queue_account, media_id, media_url, first_comment, parts, utm_*, labels, same_asset_override; unknown columns are rejected by name (map headers with mapping); every row is validated and reported separately — one bad row never sinks the file.