[Feature Request]: Add `chat.bsky.convo` reply and group conversation support

[KC-2001MS]

Summary

chat.bsky.convo upstream has been extended with two cross-cutting additions that are not yet reflected in the typed models or wrappers: message-level reply (replyTo on both input and view) and group conversations (convoView.kind union with #groupConvo, plus four new XRPC endpoints). Currently the SDK exposes neither, so the entire reply / group surface is unreachable through ATProtoBlueskyChat.

Pain points

The reply / group definitions are absent from the typed models and wrappers, so the whole surface is unreachable through ATProtoBlueskyChat: typed quote-reply on sendMessage is impossible, an incoming reply's parent is silently dropped on decode (no field-level .unknown fallback), a group is indistinguishable from a 1:1 DM with its metadata unreachable, and the group / lock endpoints require raw XRPC that re-implements the api.bsky.chat host routing / auth ATProtoBlueskyChat already provides. See Additional Context for the specific undefined types, fields, and wrappers.

Considered Alternatives

Raw XRPC for the entire chat surface (loses typed pipeline and the isRelatedToBskyChat host routing) — only viable per-client and brittle.

Is this a breaking change?

No

Library Examples

N/A

Additional Context

Missing types

Lexicon	Suggested type
chat.bsky.convo.defs#replyRef	ReplyReferenceDefinition — messageID: String (messageId)
chat.bsky.convo.defs#messageBeforeUserJoinedGroupView	MessageBeforeUserJoinedGroupViewDefinition — per lexicon
chat.bsky.convo.defs#groupConvo	GroupConvoDefinition — name: String?, createdAt: Date, lockStatus: String, lockStatusModerationOverride: String?, memberCount: Int, memberLimit: Int, joinLink: String?, joinRequestCount: Int, unreadJoinRequestCount: Int

Missing fields on existing types

Lexicon	Suggested field
chat.bsky.convo.defs#messageInput	replyTo: ReplyReferenceDefinition?
chat.bsky.convo.defs#messageView	replyTo: ReplyToUnion? (messageView | deletedMessageView | messageBeforeUserJoinedGroupView)
chat.bsky.convo.defs#convoView	kind: KindUnion? (groupConvo)

Missing wrappers

Lexicon	Suggested method
chat.bsky.convo.getConvoMembers	getConversationMembers(from:limit:cursor:)
chat.bsky.convo.listConvoRequests	listConversationRequests(limit:cursor:)
chat.bsky.convo.lockConvo	lockConversation(by:)
chat.bsky.convo.unlockConvo	unlockConversation(by:)

All four sit on api.bsky.chat, mirror the existing acceptConvo / muteConvo shape, and require isRelatedToBskyChat: true routing.

References

• Lexicon root: https://github.com/bluesky-social/atproto/tree/main/lexicons/chat/bsky/convo
• defs.json: https://github.com/bluesky-social/atproto/blob/main/lexicons/chat/bsky/convo/defs.json
• Affected file: Sources/ATProtoKit/Models/Lexicons/chat.bsky/Convo/ChatBskyConvoDefs.swift
• Affected wrapper namespace: Sources/ATProtoKit/APIReference/ChatBskyAPI/

[KC-2001MS]

As we discussed, I've filed the missing features as separate feature requests for tracking. None of them are urgent on my end, so I plan to follow up on each as the need actually arises.

Given that ATLexiconC is on the horizon, please feel free to handle these at your own pace — there's no rush, and it may well make sense to let ATLexiconC cover some of them rather than typing everything out by hand. I'm happy to help and provide corrections whenever it's useful.