diff --git a/frontend/packages/agent/src/Root.tsx b/frontend/packages/agent/src/Root.tsx
index 7aabfc37..cc3bb991 100644
--- a/frontend/packages/agent/src/Root.tsx
+++ b/frontend/packages/agent/src/Root.tsx
@@ -25,7 +25,6 @@ import { fmtAge, fmtTokens } from './lib/format.js';
 import { resolveDashboardBase } from './lib/dashboardBase.js';
 import { submitPauseResume } from './lib/pauseAction.js';
 import { postModel, postEffort } from './lib/modelEffort.js';
-import { postCancelTurn } from './lib/termActions.js';
 import type { TokenUsage } from './types.js';
 
 type OpenPanel = 'inbox' | 'todos' | null;
@@ -154,8 +153,6 @@ export function Root() {
             onSelectEffort={() => {}}
             paused={false}
             onTogglePause={() => {}}
-            thinking={false}
-            onCancelTurn={() => Promise.resolve()}
           />
         </Header>
         <main className="agent-main">
@@ -209,13 +206,6 @@ export function Root() {
               () => refresh(),
             );
           }}
-          thinking={effectiveTurnState === 'thinking'}
-          onCancelTurn={() =>
-            postCancelTurn().then((r) => {
-              if (!r.ok) liveStreamRef.current?.pushNote(`✗ /cancel failed${r.detail ? ': ' + r.detail : ''}`);
-              refresh();
-            })
-          }
         />
       </Header>
       <main className="agent-main">
diff --git a/frontend/packages/agent/src/components/StatusChips.tsx b/frontend/packages/agent/src/components/StatusChips.tsx
index 8c00f94e..72ebe367 100644
--- a/frontend/packages/agent/src/components/StatusChips.tsx
+++ b/frontend/packages/agent/src/components/StatusChips.tsx
@@ -31,8 +31,6 @@ export interface StatusChipsProps {
   paused: boolean;
   onTogglePause: () => void;
   lastTurnLabel?: string;
-  thinking: boolean;
-  onCancelTurn: () => Promise<void>;
 }
 
 const MODEL_DESCRIPTIONS: Record<string, string> = {
@@ -102,17 +100,7 @@ export function StatusChips({
   paused,
   onTogglePause,
   lastTurnLabel,
-  thinking,
-  onCancelTurn,
 }: StatusChipsProps) {
-  // `.finally()` on the caller's promise (not a `thinking`-flip effect):
-  // re-enables the button once the request actually settles, success or
-  // failure alike — ported from app.js's original
-  // `postCancelTurn().finally(() => { btn.disabled = false; })`. A
-  // `thinking`-only reset would leave the button stuck disabled on a
-  // failed request (argus, PR review): the turn is still in flight, so
-  // `thinking` never flips to trigger a reset.
-  const [cancelBusy, setCancelBusy] = useState(false);
   return (
     <div class="status-chips">
       <Badge value={aliveLabel} tone={aliveTone} />
@@ -153,19 +141,6 @@ export function StatusChips({
         onClick={onTogglePause}
       />
       {lastTurnLabel ? <span class="status-chips-last-turn">{lastTurnLabel}</span> : null}
-      {thinking ? (
-        <button
-          type="button"
-          class="btn-cancel-turn"
-          disabled={cancelBusy}
-          onClick={() => {
-            setCancelBusy(true);
-            onCancelTurn().finally(() => setCancelBusy(false));
-          }}
-        >
-          ■ cancel turn
-        </button>
-      ) : null}
     </div>
   );
 }