diff --git a/NucleicRemote/NucleicRemote/Views/Theme.swift b/NucleicRemote/NucleicRemote/Views/Theme.swift
index d0af6c2..af0f695 100644
--- a/NucleicRemote/NucleicRemote/Views/Theme.swift
+++ b/NucleicRemote/NucleicRemote/Views/Theme.swift
@@ -247,6 +247,10 @@ struct EffortMenu: View {
     var modelSKU: String? = nil
     /// Whether the target project is under Nucleic Control (gates Orchestra).
     var controlled: Bool = false
+    /// Latch Orchestra on once it's active: for an existing chat the host refuses to turn Orchestra
+    /// off (`SessionController.setEffort`), so the other levels are disabled to match. Left off for
+    /// new-chat composition, where the choice isn't committed yet and can still be changed.
+    var lockWhenOrchestra: Bool = false
 
     private var levels: [String] { catalog.offeredEfforts(forModel: modelSKU) }
     private var sentinel: String { catalog.orchestraSentinelOrFallback }