BlueSky with pdsx

Use the pdsx MCP tools (list_records, get_record, create_record, etc.) for BlueSky tasks.

Quick Reference

Following Threads

Threads span multiple users. Pattern:

1. Get the root post to see its content and who posted it:

   pythonCopy

   get_record(uri="at://did:plc:xxx/app.bsky.feed.post/abc123")
   

2. List the OP's posts and filter for replies to extract participant DIDs:

   pythonCopy

   list_records("app.bsky.feed.post", repo="did:plc:xxx", _filter="[?reply].reply.parent.uri")
   

3. Extract DIDs from the URIs (format: at://DID/collection/rkey)

4. Query each participant's posts for their contributions to the thread:

   pythonCopy

   list_records("app.bsky.feed.post", repo="did:plc:other", _filter="[?reply.root.uri=='at://did:plc:xxx/app.bsky.feed.post/abc123']")
   

Collections

Post Structure

Posts reference other posts via reply:

{
  "text": "reply text",
  "reply": {
    "root": {"uri": "at://did/collection/rkey", "cid": "bafyrei..."},
    "parent": {"uri": "at://did/collection/rkey", "cid": "bafyrei..."}
  }
}

• reply.root - thread's original post
• reply.parent - immediate parent being replied to

Creating Posts

Simple:

create_record("app.bsky.feed.post", {"text": "hello world"})

Reply (requires both uri AND cid from the parent/root posts):

create_record("app.bsky.feed.post", {
    "text": "my reply",
    "reply": {
        "root": {"uri": "at://...", "cid": "..."},
        "parent": {"uri": "at://...", "cid": "..."}
    }
})

Filtering with _filter

The _filter parameter uses JMESPath:

# just the text from posts
list_records(..., _filter="[*].text")

# reply URIs only
list_records(..., _filter="[?reply].reply.parent.uri")

# posts with specific text
list_records(..., _filter="[?contains(text, 'keyword')]")

Gotchas

1. strongRef needs uri AND cid - when creating replies, you need both from the parent post
2. profile rkey is always self - use app.bsky.actor.profile/self
3. byte indices for facets - links/mentions use UTF-8 byte positions, not character positions