pair -> join

designs/lightweight-design.md

@@ -146,7 +146,7 @@ We currently assume both devices already have access to the same Grid.
 How they obtained such access or configuration is outside the scope of this protocol.
 
 
-The pairing protocol has two parts: establishing a communication channel, and actually pairing folders.
+The protocol has two parts: establishing a communication channel, and actually joining folders.
 We separate this explicitly because we expect that future revisions will add more messages that can re-use the existing communication channel.
 
 ## Part One: Establish Communications
@@ -176,7 +176,7 @@ We do _not_ use the "Transit" portion of Magic Wormhole: all communications are
     - TODO: do we put something about this pairing protocol in versions?
 
 
-## Part Two: Pair a Folder
+## Part Two: Join a Folder
 
 Once communications are established, we're ready to send and receive Private Storage specific messages via the mailbox.
 All such messages are JSON encoded.