diff --git a/loop/webui/src/web-components/sketch-view-mode-select.ts b/loop/webui/src/web-components/sketch-view-mode-select.ts
new file mode 100644
index 0000000..b55282a
--- /dev/null
+++ b/loop/webui/src/web-components/sketch-view-mode-select.ts
@@ -0,0 +1,147 @@
+import {css, html, LitElement} from 'lit';
+import {customElement, property, state} from 'lit/decorators.js';
+import {DataManager, ConnectionStatus} from '../data';
+import {State, TimelineMessage} from '../types';
+import './sketch-container-status';
+
+@customElement('sketch-view-mode-select')
+export class SketchViewModeSelect extends LitElement {
+  // Current active mode
+  @property()
+  activeMode: "chat" | "diff" | "charts" | "terminal" = "chat";
+  // Header bar: view mode buttons
+
+  // See https://lit.dev/docs/components/styles/ for how lit-element handles CSS.
+  // Note that these styles only apply to the scope of this web component's
+  // shadow DOM node, so they won't leak out or collide with CSS declared in
+  // other components or the containing web page (...unless you want it to do that).
+
+  static styles = css`
+/* View Mode Button Styles */
+.view-mode-buttons {
+  display: flex;
+  gap: 8px;
+  margin-right: 10px;
+}
+
+.emoji-button {
+  font-size: 18px;
+  width: 32px;
+  height: 32px;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  background: white;
+  border: 1px solid #ddd;
+  border-radius: 4px;
+  cursor: pointer;
+  transition: all 0.2s ease;
+  padding: 0;
+  line-height: 1;
+}
+
+.emoji-button:hover {
+  background-color: #f0f0f0;
+  transform: translateY(-2px);
+  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
+}
+
+.emoji-button.active {
+  background-color: #e6f7ff;
+  border-color: #1890ff;
+  color: #1890ff;
+}
+`;
+  
+  constructor() {
+    super();
+    
+    // Binding methods
+    this._handleViewModeClick = this._handleViewModeClick.bind(this);
+    this._handleUpdateActiveMode = this._handleUpdateActiveMode.bind(this);
+  }
+
+  // See https://lit.dev/docs/components/lifecycle/
+  connectedCallback() {
+    super.connectedCallback();
+    
+    // Listen for update-active-mode events
+    this.addEventListener('update-active-mode', this._handleUpdateActiveMode as EventListener);
+  }
+  
+  /**
+   * Handle view mode button clicks
+   */
+  private _handleViewModeClick(mode: "chat" | "diff" | "charts" | "terminal") {
+    // Dispatch a custom event to notify the app shell to change the view
+    const event = new CustomEvent('view-mode-select', {
+      detail: { mode },
+      bubbles: true,
+      composed: true
+    });
+    this.dispatchEvent(event);
+  }
+  
+  /**
+   * Handle updates to the active mode
+   */
+  private _handleUpdateActiveMode(event: CustomEvent) {
+    const { mode } = event.detail;
+    if (mode) {
+      this.activeMode = mode;
+    }
+  }
+
+  // See https://lit.dev/docs/components/lifecycle/
+  disconnectedCallback() {
+    super.disconnectedCallback();
+    
+    // Remove event listeners
+    this.removeEventListener('update-active-mode', this._handleUpdateActiveMode as EventListener);
+  }
+
+  render() {
+    return html`
+      <div class="view-mode-buttons">
+        <button
+          id="showConversationButton"
+          class="emoji-button ${this.activeMode === 'chat' ? 'active' : ''}"
+          title="Conversation View"
+          @click=${() => this._handleViewModeClick('chat')}
+        >
+          💬
+        </button>
+        <button
+          id="showDiffButton"
+          class="emoji-button ${this.activeMode === 'diff' ? 'active' : ''}"
+          title="Diff View"
+          @click=${() => this._handleViewModeClick('diff')}
+        >
+          ±
+        </button>
+        <button
+          id="showChartsButton"
+          class="emoji-button ${this.activeMode === 'charts' ? 'active' : ''}"
+          title="Charts View"
+          @click=${() => this._handleViewModeClick('charts')}
+        >
+          📈
+        </button>
+        <button
+          id="showTerminalButton"
+          class="emoji-button ${this.activeMode === 'terminal' ? 'active' : ''}"
+          title="Terminal View"
+          @click=${() => this._handleViewModeClick('terminal')}
+        >
+          💻
+        </button>
+      </div>
+    `;
+  }
+}
+
+declare global {
+  interface HTMLElementTagNameMap {
+    "sketch-view-mode-select": SketchViewModeSelect;
+  }
+}
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