diff --git a/NucleicRemote/NucleicRemote/Views/Composer.swift b/NucleicRemote/NucleicRemote/Views/Composer.swift
index 05404c3..7aca549 100644
--- a/NucleicRemote/NucleicRemote/Views/Composer.swift
+++ b/NucleicRemote/NucleicRemote/Views/Composer.swift
@@ -8,6 +8,7 @@ struct StartChatComposer: View {
     @State private var projectID: ProjectID?
     @State private var draft = ""
     @State private var auto = false
+    @State private var effort = MobileEfforts.fallback
 
     private var projects: [WireProject] { store.dashboard.projects }
     private var selected: WireProject? {
@@ -27,6 +28,7 @@ struct StartChatComposer: View {
                         .font(.subheadline)
                 }
                 Spacer()
+                EffortMenu(effort: $effort)
                 Toggle(isOn: $auto) {
                     Label("Auto", systemImage: auto ? "bolt.fill" : "bolt.slash")
                 }
@@ -38,9 +40,10 @@ struct StartChatComposer: View {
                 TextField("Describe a task…", text: $draft, axis: .vertical)
                     .textFieldStyle(.roundedBorder)
                     .lineLimit(1...5)
+                    .ultracodeGlow(active: MobileEfforts.isUltracode(effort))
                 Button {
                     if let project = selected {
-                        store.startChat(in: project.id, message: draft, auto: auto)
+                        store.startChat(in: project.id, message: draft, effort: effort, auto: auto)
                         draft = ""
                     }
                 } label: {
diff --git a/NucleicRemote/NucleicRemote/Views/ProjectsView.swift b/NucleicRemote/NucleicRemote/Views/ProjectsView.swift
index 96850dd..781c1df 100644
--- a/NucleicRemote/NucleicRemote/Views/ProjectsView.swift
+++ b/NucleicRemote/NucleicRemote/Views/ProjectsView.swift
@@ -47,6 +47,7 @@ struct ProjectDetailView: View {
     @EnvironmentObject var store: RemoteStore
     let project: WireProject
     @State private var draft = ""
+    @State private var effort = MobileEfforts.fallback
 
     private var sessions: [WireSessionSummary] {
         store.liveSessions
@@ -57,14 +58,21 @@ struct ProjectDetailView: View {
     var body: some View {
         List {
             Section {
-                HStack(alignment: .bottom, spacing: 8) {
-                    TextField("Start a chat in \(project.name)…", text: $draft, axis: .vertical)
-                        .textFieldStyle(.roundedBorder).lineLimit(1...4)
-                    Button {
-                        store.startChat(in: project.id, message: draft)
-                        draft = ""
-                    } label: { Image(systemName: "arrow.up.circle.fill").font(.title2) }
-                        .disabled(draft.trimmingCharacters(in: .whitespaces).isEmpty || !store.canControl)
+                VStack(alignment: .leading, spacing: 8) {
+                    HStack {
+                        EffortMenu(effort: $effort)
+                        Spacer()
+                    }
+                    HStack(alignment: .bottom, spacing: 8) {
+                        TextField("Start a chat in \(project.name)…", text: $draft, axis: .vertical)
+                            .textFieldStyle(.roundedBorder).lineLimit(1...4)
+                            .ultracodeGlow(active: MobileEfforts.isUltracode(effort))
+                        Button {
+                            store.startChat(in: project.id, message: draft, effort: effort)
+                            draft = ""
+                        } label: { Image(systemName: "arrow.up.circle.fill").font(.title2) }
+                            .disabled(draft.trimmingCharacters(in: .whitespaces).isEmpty || !store.canControl)
+                    }
                 }
             }
             Section("Sessions") {
diff --git a/NucleicRemote/NucleicRemote/Views/Theme.swift b/NucleicRemote/NucleicRemote/Views/Theme.swift
index 9b972c5..0c10bcb 100644
--- a/NucleicRemote/NucleicRemote/Views/Theme.swift
+++ b/NucleicRemote/NucleicRemote/Views/Theme.swift
@@ -13,6 +13,10 @@ enum Palette {
     static let paused = Color(red: 0.62, green: 0.49, blue: 0.93)   // purple
     static let danger = Color(red: 0.92, green: 0.34, blue: 0.34)   // red
     static let neutral = Color.secondary
+    /// The ultracode (orchestration mode) signature purple — mirrors the Mac's
+    /// `AppTheme.ultracode`. Used for the effort picker's Ultracode option and the
+    /// composer's purple ring.
+    static let ultracode = Color(red: 0.55, green: 0.28, blue: 0.95)
 
     /// Dot/accent color for a session's status, refined by the last turn's disposition — a
     /// finished-the-work turn reads as "done" (success) rather than the calm "ready" accent.
@@ -113,4 +117,79 @@ extension View {
     func card(padding: CGFloat = 14) -> some View { modifier(CardBackground(padding: padding)) }
     /// Apply the teal accent app-wide.
     func nucleicTint() -> some View { tint(Palette.accent) }
+    /// Wrap a composer field in the ultracode purple ring while `active` (mirrors the Mac's
+    /// animated composer glow, lighter touch).
+    func ultracodeGlow(active: Bool, cornerRadius: CGFloat = 8) -> some View {
+        modifier(UltracodeGlowModifier(active: active, cornerRadius: cornerRadius))
+    }
+}
+
+/// The effort levels the remote offers, mirroring the Mac's `ModelCatalog.efforts` plus
+/// ultracode. `ultracodeSentinel` MUST stay equal to the host's `OrchestrationMode.effortSentinel`
+/// — it's sent verbatim over the sync wire and resolved on the host (to `xhigh` + standing
+/// consent), so a mismatch would silently disable the mode.
+enum MobileEfforts {
+    static let levels = ["low", "medium", "high", "xhigh", "max"]
+    static let ultracodeSentinel = "ultracode"
+    static let fallback = "high"
+
+    static func isUltracode(_ effort: String) -> Bool { effort == ultracodeSentinel }
+    static func displayName(_ effort: String) -> String { isUltracode(effort) ? "Ultracode" : effort }
+}
+
+/// A compact effort selector for the remote composers. Ultracode sits below the API levels,
+/// set apart with a sparkles glyph and the purple accent.
+struct EffortMenu: View {
+    @Binding var effort: String
+
+    var body: some View {
+        Menu {
+            ForEach(MobileEfforts.levels, id: \.self) { level in
+                Button { effort = level } label: {
+                    if effort == level { Label(level, systemImage: "checkmark") } else { Text(level) }
+                }
+            }
+            Divider()
+            Button { effort = MobileEfforts.ultracodeSentinel } label: {
+                Label("Ultracode", systemImage: MobileEfforts.isUltracode(effort) ? "checkmark" : "sparkles")
+            }
+        } label: {
+            HStack(spacing: 4) {
+                Image(systemName: MobileEfforts.isUltracode(effort) ? "sparkles" : "slider.horizontal.3")
+                Text(MobileEfforts.displayName(effort))
+            }
+            .font(.caption)
+            .foregroundStyle(MobileEfforts.isUltracode(effort) ? Palette.ultracode : Palette.accent)
+        }
+    }
+}
+
+/// A gentle purple ring that breathes around a composer while ultracode is selected — the
+/// remote echo of the Mac's `UltracodeGlow`. Honors Reduce Motion (holds steady).
+struct UltracodeGlowModifier: ViewModifier {
+    var active: Bool
+    var cornerRadius: CGFloat
+    @Environment(\.accessibilityReduceMotion) private var reduceMotion
+    @State private var pulsing = false
+
+    func body(content: Content) -> some View {
+        let animating = active && pulsing && !reduceMotion
+        return content
+            .overlay {
+                if active {
+                    RoundedRectangle(cornerRadius: cornerRadius, style: .continuous)
+                        .strokeBorder(Palette.ultracode.opacity(animating ? 0.9 : 0.5),
+                                      lineWidth: animating ? 1.6 : 1.2)
+                        .shadow(color: Palette.ultracode.opacity(animating ? 0.5 : 0.2),
+                                radius: animating ? 8 : 3)
+                        .animation(
+                            reduceMotion ? .default
+                                : .easeInOut(duration: 1.8).repeatForever(autoreverses: true),
+                            value: pulsing)
+                        .allowsHitTesting(false)
+                }
+            }
+            .onAppear { pulsing = active }
+            .onChange(of: active) { _, now in pulsing = now }
+    }
 }