Opening a conference already posts its card in the channel, and Share — in the antechamber before you join, and in the conference bar afterwards — opens a small window with that same address to paste anywhere else, next to Copy and Revoke. Opening it again shows the link you already have rather than minting a second one. Pasted into a conversation it draws a card instead of a bare address, and that card is the room as it is now: it counts who is inside and changes on its own as people come and go, with Join to go in and Copy link to pass it on. When the room finishes — or you revoke the link — the card stays and becomes the record of what happened: how long the conference ran and how many different people were in it, with the next thing you can still do instead of a button that no longer works. A P2P session says how long it lasted; a space and a solo game say neither, because a place has no beginning to measure from. The link carries which room it is and never permission to be in it: whoever follows it still has to be registered and a member of the channel, so a link is an invitation to a room you can already reach, not a way around the channel's door. Only a registered nickname can mint one.
Share mints a link to the call and opens it in a small window with the address, Copy and Revoke. It is there in the antechamber before you join, and in the conference bar afterwards, so you can invite people and then walk in. Closing the window leaves the button reading Share link, which opens it again. Pasting the address into a channel or a private message draws a card instead of a bare address — any such link becomes a card, including one somebody sent you from outside.
What a link does not do
A link says which room it is; it never says you may be in it. Whoever follows it still has to be registered with NickServ and a member of the channel, and a locked conference still refuses everyone but its moderators. Only a registered nickname can mint one, because the link records who made it.
