feat(ui): add copy-as-markdown in chat

Co-authored-by: Bradley Priest <bradleypriest@users.noreply.github.com>

CHANGELOG.md

@@ -20,6 +20,7 @@ Docs: https://docs.clawd.bot
 - Security: warn when <=300B models run without sandboxing and with web tools enabled.
 - Skills: add download installs with OS-filtered install options; add local sherpa-onnx-tts skill.
 - Docs: clarify WhatsApp voice notes and Windows WSL portproxy LAN access notes.
+- UI: add copy-as-markdown with error feedback and drop legacy list view. (#1345) — thanks @bradleypriest.
 ### Fixes
 - Discovery: shorten Bonjour DNS-SD service type to `_clawdbot-gw._tcp` and update discovery clients/docs.
 - Agents: preserve subagent announce thread/topic routing + queued replies across channels. (#1241) — thanks @gnarco.

ui/src/styles/chat.css

@@ -1,5 +1,4 @@
 @import "./chat/layout.css";
-@import "./chat/legacy.css";
 @import "./chat/text.css";
 @import "./chat/grouped.css";
 @import "./chat/tool-cards.css";

ui/src/styles/chat/grouped.css

@@ -91,6 +91,7 @@
 
 /* Minimal Bubble Design - dynamic width based on content */
 .chat-bubble {
+  position: relative;
   display: inline-block;
   border: 1px solid var(--border);
   background: rgba(0, 0, 0, 0.12);
@@ -102,6 +103,77 @@
   word-wrap: break-word;
 }
 
+.chat-bubble.has-copy {
+  padding-right: 36px;
+}
+
+.chat-copy-btn {
+  position: absolute;
+  top: 6px;
+  right: 8px;
+  border: 1px solid var(--border);
+  background: rgba(0, 0, 0, 0.22);
+  color: var(--muted);
+  border-radius: 8px;
+  padding: 4px 6px;
+  font-size: 14px;
+  line-height: 1;
+  cursor: pointer;
+  opacity: 0;
+  pointer-events: none;
+  transition: opacity 120ms ease-out, background 120ms ease-out;
+}
+
+.chat-copy-btn__icon {
+  display: inline-block;
+  width: 1em;
+  text-align: center;
+}
+
+.chat-bubble:hover .chat-copy-btn {
+  opacity: 1;
+  pointer-events: auto;
+}
+
+.chat-copy-btn:hover {
+  background: rgba(0, 0, 0, 0.3);
+}
+
+.chat-copy-btn[data-copying="1"] {
+  opacity: 0;
+  pointer-events: none;
+}
+
+.chat-copy-btn[data-error="1"] {
+  opacity: 1;
+  pointer-events: auto;
+  border-color: rgba(255, 69, 58, 0.8);
+  background: rgba(255, 69, 58, 0.18);
+  color: rgba(255, 69, 58, 1);
+}
+
+.chat-copy-btn[data-copied="1"] {
+  opacity: 1;
+  pointer-events: auto;
+  border-color: rgba(52, 199, 183, 0.8);
+  background: rgba(52, 199, 183, 0.18);
+  color: rgba(52, 199, 183, 1);
+}
+
+.chat-copy-btn:focus-visible {
+  opacity: 1;
+  pointer-events: auto;
+  outline: 2px solid var(--accent);
+  outline-offset: 2px;
+}
+
+@media (hover: none) {
+  .chat-copy-btn {
+    opacity: 1;
+    pointer-events: auto;
+  }
+}
+
 .chat-bubble:hover {
   background: rgba(0, 0, 0, 0.18);
 }
@@ -145,4 +217,3 @@
     transform: translateY(0);
   }
 }
-

ui/src/styles/chat/legacy.css

@@ -1,43 +0,0 @@
-/* =============================================
-   LEGACY CHAT LINE LAYOUT (non-grouped)
-   ============================================= */
-
-.chat-line {
-  display: flex;
-  margin-bottom: 12px;
-}
-
-.chat-line.user {
-  justify-content: flex-end;
-}
-
-.chat-line.assistant,
-.chat-line.other,
-.chat-line.tool {
-  justify-content: flex-start;
-}
-
-.chat-line.tool .chat-bubble {
-  border-style: dashed;
-  opacity: 0.95;
-}
-
-.chat-msg {
-  display: grid;
-  gap: 6px;
-  max-width: min(900px, 95%);
-}
-
-.chat-line.user .chat-msg {
-  justify-items: end;
-}
-
-.chat-stamp {
-  font-size: 11px;
-  color: var(--muted);
-}
-
-.chat-line.user .chat-stamp {
-  text-align: right;
-}
-

ui/src/ui/app-render.helpers.ts

@@ -39,10 +39,6 @@ export function renderTab(state: AppViewState, tab: Tab) {
 
 export function renderChatControls(state: AppViewState) {
   const sessionOptions = resolveSessionOptions(state.sessionKey, state.sessionsResult);
-  // Icon for list view (legacy)
-  const listIcon = html`<svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><line x1="8" y1="6" x2="21" y2="6"></line><line x1="8" y1="12" x2="21" y2="12"></line><line x1="8" y1="18" x2="21" y2="18"></line><line x1="3" y1="6" x2="3.01" y2="6"></line><line x1="3" y1="12" x2="3.01" y2="12"></line><line x1="3" y1="18" x2="3.01" y2="18"></line></svg>`;
-  // Icon for grouped view
-  const groupIcon = html`<svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><rect x="3" y="3" width="7" height="7"></rect><rect x="14" y="3" width="7" height="7"></rect><rect x="14" y="14" width="7" height="7"></rect><rect x="3" y="14" width="7" height="7"></rect></svg>`;
   // Refresh icon
   const refreshIcon = html`<svg width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M21 12a9 9 0 1 1-9-9c2.52 0 4.93 1 6.74 2.74L21 8"></path><path d="M21 3v5h-5"></path></svg>`;
   const focusIcon = html`<svg width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M4 7V4h3"></path><path d="M20 7V4h-3"></path><path d="M4 17v3h3"></path><path d="M20 17v3h-3"></path><circle cx="12" cy="12" r="3"></circle></svg>`;
@@ -116,18 +112,6 @@ export function renderChatControls(state: AppViewState) {
       >
         ${focusIcon}
       </button>
-      <button
-        class="btn btn--sm btn--icon ${state.settings.useNewChatLayout ? "active" : ""}"
-        @click=${() =>
-          state.applySettings({
-            ...state.settings,
-            useNewChatLayout: !state.settings.useNewChatLayout,
-          })}
-        aria-pressed=${state.settings.useNewChatLayout}
-        title="${state.settings.useNewChatLayout ? "Switch to list view" : "Switch to grouped view"}"
-      >
-        ${state.settings.useNewChatLayout ? groupIcon : listIcon}
-      </button>
     </div>
   `;
 }

ui/src/ui/app-render.ts

@@ -429,11 +429,7 @@ export function renderApp(state: AppViewState) {
               disabledReason: chatDisabledReason,
               error: state.lastError,
               sessions: state.sessionsResult,
-              isToolOutputExpanded: (id) => state.toolOutputExpanded.has(id),
-              onToolOutputToggle: (id, expanded) =>
-                state.toggleToolOutput(id, expanded),
               focusMode: state.settings.chatFocusMode,
-              useNewChatLayout: state.settings.useNewChatLayout,
               onRefresh: () => {
                 state.resetToolStream();
                 return loadChatHistory(state);
@@ -443,11 +439,6 @@ export function renderApp(state: AppViewState) {
                   ...state.settings,
                   chatFocusMode: !state.settings.chatFocusMode,
                 }),
-              onToggleLayout: () =>
-                state.applySettings({
-                  ...state.settings,
-                  useNewChatLayout: !state.settings.useNewChatLayout,
-                }),
               onChatScroll: (event) => state.handleChatScroll(event),
               onDraftChange: (next) => (state.chatMessage = next),
               onSend: () => state.handleSendChat(),

ui/src/ui/app-tool-stream.ts

@@ -31,7 +31,6 @@ type ToolStreamHost = {
   toolStreamById: Map<string, ToolStreamEntry>;
   toolStreamOrder: string[];
   chatToolMessages: Record<string, unknown>[];
-  toolOutputExpanded: Set<string>;
   toolStreamSyncTimer: number | null;
 };
 
@@ -136,20 +135,9 @@ export function resetToolStream(host: ToolStreamHost) {
   host.toolStreamById.clear();
   host.toolStreamOrder = [];
   host.chatToolMessages = [];
-  host.toolOutputExpanded = new Set();
   flushToolStreamSync(host);
 }
 
-export function toggleToolOutput(host: ToolStreamHost, id: string, expanded: boolean) {
-  const next = new Set(host.toolOutputExpanded);
-  if (expanded) {
-    next.add(id);
-  } else {
-    next.delete(id);
-  }
-  host.toolOutputExpanded = next;
-}
-
 export function handleAgentEvent(host: ToolStreamHost, payload?: AgentEventPayload) {
   if (!payload || payload.stream !== "tool") return;
   const sessionKey =

ui/src/ui/app.ts

@@ -33,7 +33,6 @@ import type { DevicePairingList } from "./controllers/devices";
 import type { ExecApprovalRequest } from "./controllers/exec-approval";
 import {
   resetToolStream as resetToolStreamInternal,
-  toggleToolOutput as toggleToolOutputInternal,
   type ToolStreamEntry,
 } from "./app-tool-stream";
 import {
@@ -109,7 +108,6 @@ export class ClawdbotApp extends LitElement {
   @state() chatRunId: string | null = null;
   @state() chatThinkingLevel: string | null = null;
   @state() chatQueue: ChatQueueItem[] = [];
-  @state() toolOutputExpanded = new Set<string>();
   // Sidebar state for tool output viewing
   @state() sidebarOpen = false;
   @state() sidebarContent: string | null = null;
@@ -301,13 +299,6 @@ export class ClawdbotApp extends LitElement {
     );
   }
 
-  toggleToolOutput(id: string, expanded: boolean) {
-    toggleToolOutputInternal(
-      this as unknown as Parameters<typeof toggleToolOutputInternal>[0],
-      id,
-      expanded,
-    );
-  }
   applySettings(next: UiSettings) {
     applySettingsInternal(
       this as unknown as Parameters<typeof applySettingsInternal>[0],

ui/src/ui/chat-markdown.browser.test.ts

@@ -28,12 +28,7 @@ afterEach(() => {
 });
 
 describe("chat markdown rendering", () => {
-  it("renders markdown inside tool result cards", async () => {
-    localStorage.setItem(
-      "clawdbot.control.settings.v1",
-      JSON.stringify({ useNewChatLayout: false }),
-    );
-
+  it("renders markdown inside tool output sidebar", async () => {
     const app = mountApp("/chat");
     await app.updateComplete;
 
@@ -48,12 +43,16 @@ describe("chat markdown rendering", () => {
         timestamp,
       },
     ];
-    // Expand the tool output card so its markdown is rendered into the DOM.
-    app.toolOutputExpanded = new Set([`${timestamp}:1`]);
 
     await app.updateComplete;
 
-    const strong = app.querySelector(".chat-tool-card__output strong");
+    const toolCard = app.querySelector(".chat-tool-card") as HTMLElement | null;
+    expect(toolCard).not.toBeNull();
+    toolCard?.click();
+
+    await app.updateComplete;
+
+    const strong = app.querySelector(".sidebar-markdown strong");
     expect(strong?.textContent).toBe("world");
   });
 });

ui/src/ui/chat/copy-as-markdown.ts

@@ -0,0 +1,82 @@
+import { html, type TemplateResult } from "lit";
+
+const COPIED_FOR_MS = 1500;
+const ERROR_FOR_MS = 2000;
+const COPY_LABEL = "Copy as markdown";
+const COPIED_LABEL = "Copied";
+const ERROR_LABEL = "Copy failed";
+const COPY_ICON = "📋";
+const COPIED_ICON = "✓";
+const ERROR_ICON = "!";
+
+async function copyTextToClipboard(text: string): Promise<boolean> {
+  if (!text) return false;
+
+  try {
+    await navigator.clipboard.writeText(text);
+    return true;
+  } catch {
+    return false;
+  }
+}
+
+export function renderCopyAsMarkdownButton(markdown: string): TemplateResult {
+  return html`
+    <button
+      class="chat-copy-btn"
+      type="button"
+      title=${COPY_LABEL}
+      aria-label=${COPY_LABEL}
+      @click=${async (e: Event) => {
+        const btn = e.currentTarget as HTMLButtonElement | null;
+        const icon = btn?.querySelector(
+          ".chat-copy-btn__icon",
+        ) as HTMLElement | null;
+
+        if (!btn || btn.dataset.copying === "1") return;
+
+        btn.dataset.copying = "1";
+        btn.setAttribute("aria-busy", "true");
+        btn.disabled = true;
+
+        const copied = await copyTextToClipboard(markdown);
+        if (!btn.isConnected) return;
+
+        delete btn.dataset.copying;
+        btn.removeAttribute("aria-busy");
+        btn.disabled = false;
+
+        if (!copied) {
+          btn.dataset.error = "1";
+          btn.title = ERROR_LABEL;
+          btn.setAttribute("aria-label", ERROR_LABEL);
+          if (icon) icon.textContent = ERROR_ICON;
+
+          window.setTimeout(() => {
+            if (!btn.isConnected) return;
+            delete btn.dataset.error;
+            btn.title = COPY_LABEL;
+            btn.setAttribute("aria-label", COPY_LABEL);
+            if (icon) icon.textContent = COPY_ICON;
+          }, ERROR_FOR_MS);
+          return;
+        }
+
+        btn.dataset.copied = "1";
+        btn.title = COPIED_LABEL;
+        btn.setAttribute("aria-label", COPIED_LABEL);
+        if (icon) icon.textContent = COPIED_ICON;
+
+        window.setTimeout(() => {
+          if (!btn.isConnected) return;
+          delete btn.dataset.copied;
+          btn.title = COPY_LABEL;
+          btn.setAttribute("aria-label", COPY_LABEL);
+          if (icon) icon.textContent = COPY_ICON;
+        }, COPIED_FOR_MS);
+      }}
+    >
+      <span class="chat-copy-btn__icon" aria-hidden="true">${COPY_ICON}</span>
+    </button>
+  `;
+}

ui/src/ui/chat/grouped-render.ts

@@ -3,6 +3,7 @@ import { unsafeHTML } from "lit/directives/unsafe-html.js";
 
 import { toSanitizedMarkdownHtml } from "../markdown";
 import type { MessageGroup } from "../types/chat-types";
+import { renderCopyAsMarkdownButton } from "./copy-as-markdown";
 import { isToolResultMessage, normalizeRoleForGrouping } from "./message-normalizer";
 import {
   extractText,
@@ -150,9 +151,11 @@ function renderGroupedMessage(
     ? formatReasoningMarkdown(extractedThinking)
     : null;
   const markdown = markdownBase;
+  const canCopyMarkdown = role === "assistant" && Boolean(markdown?.trim());
 
   const bubbleClasses = [
     "chat-bubble",
+    canCopyMarkdown ? "has-copy" : "",
     opts.isStreaming ? "streaming" : "",
     "fade-in",
   ]
@@ -169,6 +172,7 @@ function renderGroupedMessage(
 
   return html`
     <div class="${bubbleClasses}">
+      ${canCopyMarkdown ? renderCopyAsMarkdownButton(markdown!) : nothing}
       ${reasoningMarkdown
         ? html`<div class="chat-thinking">${unsafeHTML(
             toSanitizedMarkdownHtml(reasoningMarkdown),
@@ -181,4 +185,3 @@ function renderGroupedMessage(
     </div>
   `;
 }
-

ui/src/ui/chat/legacy-render.ts

@@ -1,129 +0,0 @@
-import { html, nothing } from "lit";
-import { unsafeHTML } from "lit/directives/unsafe-html.js";
-
-import { toSanitizedMarkdownHtml } from "../markdown";
-import {
-  isToolResultMessage,
-  normalizeRoleForGrouping,
-} from "./message-normalizer";
-import {
-  extractText,
-  extractThinking,
-  formatReasoningMarkdown,
-} from "./message-extract";
-import { extractToolCards, renderToolCardLegacy } from "./tool-cards";
-
-export type LegacyToolOutputProps = {
-  isToolOutputExpanded?: (id: string) => boolean;
-  onToolOutputToggle?: (id: string, expanded: boolean) => void;
-};
-
-export function renderReadingIndicator() {
-  return html`
-    <div class="chat-line assistant">
-      <div class="chat-msg">
-        <div class="chat-bubble chat-reading-indicator" aria-hidden="true">
-          <span class="chat-reading-indicator__dots">
-            <span></span><span></span><span></span>
-          </span>
-        </div>
-      </div>
-    </div>
-  `;
-}
-
-export function renderMessage(
-  message: unknown,
-  props?: LegacyToolOutputProps,
-  opts?: { streaming?: boolean; showReasoning?: boolean },
-) {
-  const m = message as Record<string, unknown>;
-  const role = typeof m.role === "string" ? m.role : "unknown";
-  const toolCards = extractToolCards(message);
-  const hasToolCards = toolCards.length > 0;
-  const isToolResult =
-    isToolResultMessage(message) ||
-    typeof m.toolCallId === "string" ||
-    typeof m.tool_call_id === "string";
-  const extractedText = extractText(message);
-  const extractedThinking =
-    opts?.showReasoning && role === "assistant" ? extractThinking(message) : null;
-  const contentText = typeof m.content === "string" ? m.content : null;
-  const fallback = hasToolCards ? null : JSON.stringify(message, null, 2);
-
-  const display =
-    !isToolResult && extractedText?.trim()
-      ? { kind: "text" as const, value: extractedText }
-      : !isToolResult && contentText?.trim()
-        ? { kind: "text" as const, value: contentText }
-        : !isToolResult && fallback
-          ? { kind: "json" as const, value: fallback }
-          : null;
-
-  const markdownBase =
-    display?.kind === "json"
-      ? ["```json", display.value, "```"].join("\n")
-      : (display?.value ?? null);
-  const reasoningMarkdown = extractedThinking
-    ? formatReasoningMarkdown(extractedThinking)
-    : null;
-  const markdown = markdownBase;
-
-  const timestamp =
-    typeof m.timestamp === "number" ? new Date(m.timestamp).toLocaleTimeString() : "";
-
-  const normalizedRole = normalizeRoleForGrouping(role);
-  const klass =
-    normalizedRole === "assistant"
-      ? "assistant"
-      : normalizedRole === "user"
-        ? "user"
-        : normalizedRole === "tool"
-          ? "tool"
-          : "other";
-  const who =
-    normalizedRole === "assistant"
-      ? "Assistant"
-      : normalizedRole === "user"
-        ? "You"
-        : normalizedRole === "tool"
-          ? "Working"
-          : normalizedRole;
-
-  const toolCallId = typeof m.toolCallId === "string" ? m.toolCallId : "";
-  const toolCardBase =
-    toolCallId ||
-    (typeof m.id === "string" ? m.id : "") ||
-    (typeof m.messageId === "string" ? m.messageId : "") ||
-    (typeof m.timestamp === "number" ? String(m.timestamp) : "tool-card");
-
-  return html`
-    <div class="chat-line ${klass}">
-      <div class="chat-msg">
-        <div class="chat-bubble ${opts?.streaming ? "streaming" : ""}">
-          ${reasoningMarkdown
-            ? html`<div class="chat-thinking">${unsafeHTML(
-                toSanitizedMarkdownHtml(reasoningMarkdown),
-              )}</div>`
-            : nothing}
-          ${markdown
-            ? html`<div class="chat-text">${unsafeHTML(toSanitizedMarkdownHtml(markdown))}</div>`
-            : nothing}
-          ${toolCards.map((card, index) =>
-            renderToolCardLegacy(card, {
-              id: `${toolCardBase}:${index}`,
-              expanded: props?.isToolOutputExpanded
-                ? props.isToolOutputExpanded(`${toolCardBase}:${index}`)
-                : false,
-              onToggle: props?.onToolOutputToggle,
-            }),
-          )}
-        </div>
-        <div class="chat-stamp mono">
-          ${who}${timestamp ? html` · ${timestamp}` : nothing}
-        </div>
-      </div>
-    </div>
-  `;
-}
-

ui/src/ui/chat/tool-cards.ts

@@ -1,7 +1,5 @@
 import { html, nothing } from "lit";
-import { unsafeHTML } from "lit/directives/unsafe-html.js";
 
-import { toSanitizedMarkdownHtml } from "../markdown";
 import { formatToolDetail, resolveToolDisplay } from "../tool-display";
 import type { ToolCard } from "../types/chat-types";
 import { TOOL_INLINE_THRESHOLD } from "./constants";
@@ -54,60 +52,6 @@ export function extractToolCards(message: unknown): ToolCard[] {
   return cards;
 }
 
-export function renderToolCardLegacy(
-  card: ToolCard,
-  opts?: {
-    id: string;
-    expanded: boolean;
-    onToggle?: (id: string, expanded: boolean) => void;
-  },
-) {
-  const display = resolveToolDisplay({ name: card.name, args: card.args });
-  const detail = formatToolDetail(display);
-  const hasOutput = typeof card.text === "string" && card.text.length > 0;
-  const expanded = opts?.expanded ?? false;
-  const id = opts?.id ?? `${card.name}-${Math.random()}`;
-  return html`
-    <div class="chat-tool-card">
-      <div class="chat-tool-card__header">
-        <div class="chat-tool-card__title">
-          <span class="chat-tool-card__icon">${display.emoji}</span>
-          <span>${display.label}</span>
-        </div>
-        ${!hasOutput ? html`<span class="chat-tool-card__status">✓</span>` : nothing}
-      </div>
-      ${detail
-        ? html`<div class="chat-tool-card__detail">${detail}</div>`
-        : nothing}
-      ${hasOutput
-        ? html`
-            <details
-              class="chat-tool-card__details"
-              ?open=${expanded}
-              @toggle=${(e: Event) => {
-                if (!opts?.onToggle) return;
-                const target = e.currentTarget as HTMLDetailsElement;
-                opts.onToggle(id, target.open);
-              }}
-            >
-              <summary class="chat-tool-card__summary">
-                ${expanded ? "Hide output" : "Show output"}
-                <span class="chat-tool-card__summary-meta">
-                  (${card.text?.length ?? 0} chars)
-                </span>
-              </summary>
-              ${expanded
-                ? html`<div class="chat-tool-card__output chat-text">
-                    ${unsafeHTML(toSanitizedMarkdownHtml(card.text ?? ""))}
-                  </div>`
-                : nothing}
-            </details>
-          `
-        : nothing}
-    </div>
-  `;
-}
-
 export function renderToolCardSidebar(
   card: ToolCard,
   onOpenSidebar?: (content: string) => void,
@@ -197,4 +141,3 @@ function extractToolText(item: Record<string, unknown>): string | undefined {
   if (typeof item.content === "string") return item.content;
   return undefined;
 }
-

ui/src/ui/storage.ts

@@ -11,7 +11,6 @@ export type UiSettings = {
   chatFocusMode: boolean;
   chatShowThinking: boolean;
   splitRatio: number; // Sidebar split ratio (0.4 to 0.7, default 0.6)
-  useNewChatLayout: boolean; // Slack-style grouped messages layout
   navCollapsed: boolean; // Collapsible sidebar state
   navGroupsCollapsed: Record<string, boolean>; // Which nav groups are collapsed
 };
@@ -31,7 +30,6 @@ export function loadSettings(): UiSettings {
     chatFocusMode: false,
     chatShowThinking: true,
     splitRatio: 0.6,
-    useNewChatLayout: true, // Enabled by default
     navCollapsed: false,
     navGroupsCollapsed: {},
   };
@@ -77,10 +75,6 @@ export function loadSettings(): UiSettings {
         parsed.splitRatio <= 0.7
           ? parsed.splitRatio
           : defaults.splitRatio,
-      useNewChatLayout:
-        typeof parsed.useNewChatLayout === "boolean"
-          ? parsed.useNewChatLayout
-          : defaults.useNewChatLayout,
       navCollapsed:
         typeof parsed.navCollapsed === "boolean"
           ? parsed.navCollapsed

ui/src/ui/views/chat.ts

@@ -8,7 +8,6 @@ import {
   normalizeRoleForGrouping,
 } from "../chat/message-normalizer";
 import { extractText } from "../chat/message-extract";
-import { renderMessage, renderReadingIndicator } from "../chat/legacy-render";
 import {
   renderMessageGroup,
   renderReadingIndicatorGroup,
@@ -36,14 +35,9 @@ export type ChatProps = {
   disabledReason: string | null;
   error: string | null;
   sessions: SessionsListResult | null;
-  // Legacy tool output expand/collapse (used when useNewChatLayout is false)
-  isToolOutputExpanded: (id: string) => boolean;
-  onToolOutputToggle: (id: string, expanded: boolean) => void;
   // Focus mode
   focusMode: boolean;
-  // Feature flag for new Slack-style layout with sidebar
-  useNewChatLayout?: boolean;
-  // Sidebar state (used when useNewChatLayout is true)
+  // Sidebar state
   sidebarOpen?: boolean;
   sidebarContent?: string | null;
   sidebarError?: string | null;
@@ -51,7 +45,6 @@ export type ChatProps = {
   // Event handlers
   onRefresh: () => void;
   onToggleFocusMode: () => void;
-  onToggleLayout?: () => void;
   onDraftChange: (next: string) => void;
   onSend: () => void;
   onAbort?: () => void;
@@ -78,7 +71,6 @@ export function renderChat(props: ChatProps) {
 
   const splitRatio = props.splitRatio ?? 0.6;
   const sidebarOpen = Boolean(props.sidebarOpen && props.onCloseSidebar);
-  const useNewLayout = props.useNewChatLayout ?? false;
 
   return html`
     <section class="card chat">
@@ -122,27 +114,15 @@ export function renderChat(props: ChatProps) {
               : nothing}
             ${repeat(buildChatItems(props), (item) => item.key, (item) => {
               if (item.kind === "reading-indicator") {
-                return useNewLayout
-                  ? renderReadingIndicatorGroup()
-                  : renderReadingIndicator();
+                return renderReadingIndicatorGroup();
               }
 
               if (item.kind === "stream") {
-                return useNewLayout
-                  ? renderStreamingGroup(
-                      item.text,
-                      item.startedAt,
-                      props.onOpenSidebar,
-                    )
-                  : renderMessage(
-                      {
-                        role: "assistant",
-                        content: [{ type: "text", text: item.text }],
-                        timestamp: item.startedAt,
-                      },
-                      props,
-                      { streaming: true, showReasoning },
-                    );
+                return renderStreamingGroup(
+                  item.text,
+                  item.startedAt,
+                  props.onOpenSidebar,
+                );
               }
 
               if (item.kind === "group") {
@@ -152,12 +132,12 @@ export function renderChat(props: ChatProps) {
                 });
               }
 
-              return renderMessage(item.message, props, { showReasoning });
+              return nothing;
             })}
           </div>
         </div>
 
-        ${useNewLayout && sidebarOpen
+        ${sidebarOpen
           ? html`
               <resizable-divider
                 .splitRatio=${splitRatio}
@@ -348,8 +328,7 @@ function buildChatItems(props: ChatProps): Array<ChatItem | MessageGroup> {
     }
   }
 
-  if (props.useNewChatLayout) return groupMessages(items);
-  return items;
+  return groupMessages(items);
 }
 
 function messageKey(message: unknown, index: number): string {