Create a group
POST /v1/chats accepts 2 to 31 recipient Handles plus the sender.
Limits
- A group starts with the sender plus 2 to 31 recipient Contacts.
- A group has at most 32 active Contacts.
- Removing or leaving must keep at least three active Contacts.
Rename the group
Set a group photo
Upload an image Attachment, then pass its ID:Group metadata events
Membership changes have their own routes, visibility rules, and events.

