diff --git a/client/app.js b/client/app.js
index 1133fa74..1115e343 100644
--- a/client/app.js
+++ b/client/app.js
@@ -869,18 +869,31 @@ class ClaudeOrchestrator {
 
   updateSidebarToggleIcon() {
     const toggle = document.getElementById('sidebar-toggle');
-    if (!toggle) return;
+    const mobileToggle = document.getElementById('mobile-sidebar-toggle');
+    if (!toggle && !mobileToggle) return;
 
-    const isCollapsed = this.isMobileLayout()
-      ? !document.body.classList.contains('sidebar-open')
-      : document.body.classList.contains('sidebar-collapsed');
-    const shouldBeExpanded = !isCollapsed;
-    const label = shouldBeExpanded ? 'Collapse sidebar' : 'Expand sidebar';
+    const isMobile = this.isMobileLayout();
+    const isExpanded = isMobile
+      ? document.body.classList.contains('sidebar-open')
+      : !document.body.classList.contains('sidebar-collapsed');
+    const isCollapsed = !isExpanded;
+    const label = isCollapsed
+      ? (isMobile ? 'Show worktrees' : 'Expand sidebar')
+      : (isMobile ? 'Hide worktrees' : 'Collapse sidebar');
+
+    if (toggle) {
+      toggle.classList.toggle('is-collapsed', isCollapsed);
+      toggle.title = label;
+      toggle.setAttribute('aria-label', label);
+      toggle.setAttribute('aria-expanded', String(isExpanded));
+    }
 
-    toggle.classList.toggle('is-collapsed', isCollapsed);
-    toggle.title = label;
-    toggle.setAttribute('aria-label', label);
-    toggle.setAttribute('aria-expanded', String(shouldBeExpanded));
+    if (mobileToggle) {
+      mobileToggle.classList.toggle('is-collapsed', isCollapsed);
+      mobileToggle.title = label;
+      mobileToggle.setAttribute('aria-label', label);
+      mobileToggle.setAttribute('aria-expanded', String(isExpanded));
+    }
   }
 
   getSidebarDesktopCollapsedPref() {
@@ -1884,10 +1897,6 @@ class ClaudeOrchestrator {
 	            this.toggleWorktreeVisibility(worktreeId);
 	          }
 
-	          // On mobile, hide sidebar after selection so the terminals are visible.
-	          if (this.isMobileLayout()) {
-	            this.closeSidebar();
-	          }
 	        }
 	      });
 	    }
@@ -1900,6 +1909,14 @@ class ClaudeOrchestrator {
 	      });
 	    }
 
+	    const mobileSidebarToggle = document.getElementById('mobile-sidebar-toggle');
+	    if (mobileSidebarToggle) {
+	      mobileSidebarToggle.addEventListener('click', (e) => {
+	        e.preventDefault();
+	        this.toggleSidebar();
+	      });
+	    }
+
 	    const sidebarBackdrop = document.getElementById('sidebar-backdrop');
 	    if (sidebarBackdrop) {
 	      sidebarBackdrop.addEventListener('click', (e) => {
diff --git a/client/index.html b/client/index.html
index 2e88a612..0556aad7 100644
--- a/client/index.html
+++ b/client/index.html
@@ -51,10 +51,11 @@ <h2>Worktrees</h2>
 	    </aside>
 	    <div id="sidebar-backdrop" class="sidebar-backdrop hidden" aria-hidden="true"></div>
 	    
-	    <!-- Main Content -->
+        <!-- Main Content -->
         <div class="main-container">
 	        <!-- Header -->
 	        <header>
+            <button id="mobile-sidebar-toggle" class="icon-button mobile-sidebar-toggle" title="Show worktrees" aria-label="Show worktrees" aria-controls="worktree-sidebar" aria-expanded="false">☰</button>
             <button id="commander-toggle" class="header-btn commander-btn" title="Commander (Top-Level AI)" data-ui-visibility="header.commander">
                 🎖️ Commander
             </button>
diff --git a/client/styles.css b/client/styles.css
index cea68fdf..47292528 100644
--- a/client/styles.css
+++ b/client/styles.css
@@ -1247,6 +1247,10 @@ header {
   will-change: transform;
 }
 
+.mobile-sidebar-toggle {
+  display: none;
+}
+
 .sidebar-toggle.is-collapsed .sidebar-toggle-icon {
   transform: rotate(180deg);
 }
@@ -7361,6 +7365,24 @@ body.dependency-onboarding-active #dependency-setup-modal {
     min-height: 70vh;
   }
 
+  .mobile-sidebar-toggle {
+    display: inline-flex;
+    width: 36px;
+    height: 32px;
+    margin: 0;
+    padding: 0;
+    align-items: center;
+    justify-content: center;
+    font-size: 1.05rem;
+    border: 1px solid var(--border-color);
+    border-radius: var(--radius-sm);
+    background: var(--bg-tertiary);
+  }
+
+  .mobile-sidebar-toggle:hover {
+    background: var(--bg-primary);
+  }
+
   .sidebar-toggle {
     display: inline-flex;
   }