diff --git a/NucleicRemote/NucleicRemote/Models/HostConnection.swift b/NucleicRemote/NucleicRemote/Models/HostConnection.swift
index 8587ad9..108ec67 100644
--- a/NucleicRemote/NucleicRemote/Models/HostConnection.swift
+++ b/NucleicRemote/NucleicRemote/Models/HostConnection.swift
@@ -92,6 +92,9 @@ final class HostConnection {
         var meshRosterChanged: () -> Void = {}
         /// The embedded Tailscale node's status changed (for Settings).
         var tailnetStatus: (String?, URL?) -> Void = { _, _ in }
+        /// A join code this host minted at our request ("add a device to this mesh") — the
+        /// `nucleic://pair?d=…` string to show as a QR / copyable code, or nil if it couldn't.
+        var pairingCodeReceived: (String?) -> Void = { _ in }
     }
     private let callbacks: Callbacks