Reply reference builder

BlueSky thread root and parent pointer builder

Generate the app.bsky.feed.post reply object that keeps BlueSky threads connected through root and parent strong references.

Build reply JSON

A BlueSky reply needs the original thread root and the immediate parent post. Both are strong references: an AT URI plus the post CID.

Reply shape ready

Reply post text63/300 characters

Root post AT URIRoot CIDParent post AT URIParent CIDcreatedAt timestamp

Generated post record

{
  "$type": "app.bsky.feed.post",
  "text": "Replying with the next approved post in the ONYX launch thread.",
  "createdAt": "2026-06-21T22:26:17.008Z",
  "reply": {
    "root": {
      "uri": "at://did:plc:creatorroot/app.bsky.feed.post/3krootpost",
      "cid": "bafyreig2fjxi3rptqdgylg7e5hmjl6mcke7rn2b6cugzlqq3i4zu6rq52q"
    },
    "parent": {
      "uri": "at://did:plc:creatorroot/app.bsky.feed.post/3kparentpost",
      "cid": "bafyreiecx6dujwoeqpdzl27w67z4h46hyklk3an4i4cvvmioaqb2qbyo5u"
    }
  }
}