Hand a conversation over, not your phone.
Delegate a client for a week, cover a colleague's leave, or give a successor a window into the conversations when someone moves on. Nothing opens until the other person accepts, either side can end it, and the record stays with the owner.
One conversation, a category, a number, or everything.
Category, number and everything-sized shares are evaluated live, so a new conversation joins the moment it matches. Tags narrow a share; they are never required to make one.

Two permissions. One owner.
A view-only grant reads the thread and its attachments. A reply grant also sends from your number, and every such message reads "X on behalf of Y" on both sides, because WhatsApp itself has no way to say it. Pin, archive, tag, star, edit, delete, forward and re-share stay yours.
Seven days, 30 days or none. Change it or revoke any time; the other person can leave any time.
Reading a shared thread never sends a receipt to the contact and never clears your unread badge.
Advanced-security conversations can be shared, but the sealed content stays sealed: keys live on the two participants' devices.
Entries are added and never edited.
Read it from the Shared tab: open a share you made and tap History. It is the owner's view; agents' sends land in the same trail, attributed by the agent's name.
Invitations on top, live rows beneath.
Pending invitations at the top, shared conversations as live rows beneath, each grant's terms one tap away. Its badge counts invitations plus unread in shared threads. Up to 100 live shares per account during the beta.
Conversations shared to you are never visible to your agents. A grant to a person is not a grant to their software.