diff --git a/NucleicRemote/NucleicRemote/Views/Composer.swift b/NucleicRemote/NucleicRemote/Views/Composer.swift
index 44fef85..4da79f5 100644
--- a/NucleicRemote/NucleicRemote/Views/Composer.swift
+++ b/NucleicRemote/NucleicRemote/Views/Composer.swift
@@ -9,6 +9,9 @@ struct StartChatComposer: View {
     /// start typing a new chat immediately. Consumed (reset to false) once handled, so it never
     /// steals focus on a later Home appearance. `.constant(false)` for the iPhone/compact path.
     var focusNewChat: Binding<Bool> = .constant(false)
+    /// Called after a chat is kicked off, so a host that presents the composer modally (e.g. the
+    /// Sessions tab's floating New-chat button) can dismiss itself. Home leaves it nil and stays put.
+    var onStart: (() -> Void)? = nil
     @State private var projectID: ProjectID?
     @State private var draft = ""
     @State private var auto = false