diff --git a/packages/app/e2e/codex-plan-approval.spec.ts b/packages/app/e2e/codex-plan-approval.spec.ts
new file mode 100644
index 000000000..61769afef
--- /dev/null
+++ b/packages/app/e2e/codex-plan-approval.spec.ts
@@ -0,0 +1,63 @@
+import { expect, test } from "./fixtures";
+import { buildHostWorkspaceRoute } from "@/utils/host-routes";
+import { allowPermission, waitForPermissionPrompt } from "./helpers/app";
+import { connectTerminalClient } from "./helpers/terminal-perf";
+import { createTempGitRepo } from "./helpers/workspace";
+
+function getServerId(): string {
+  const serverId = process.env.E2E_SERVER_ID;
+  if (!serverId) {
+    throw new Error("E2E_SERVER_ID is not set.");
+  }
+  return serverId;
+}
+
+test.describe("Codex plan approval", () => {
+  test("shows a single actionable plan panel and removes it after implementation starts", async ({
+    page,
+  }) => {
+    test.setTimeout(180_000);
+
+    const repo = await createTempGitRepo("codex-plan-approval-");
+    const client = await connectTerminalClient();
+
+    try {
+      const workspaceResult = await client.openProject(repo.path);
+      if (!workspaceResult.workspace) {
+        throw new Error(workspaceResult.error ?? `Failed to open project ${repo.path}`);
+      }
+
+      const agent = await client.createAgent({
+        provider: "codex",
+        cwd: repo.path,
+        title: "Codex plan approval e2e",
+        model: "gpt-5.4-mini",
+        thinkingOptionId: "low",
+        featureValues: { plan_mode: true, fast_mode: true },
+        initialPrompt:
+          "Create a concise plan to add a README note. Present the plan only and wait for approval.",
+      });
+
+      const agentUrl = `${buildHostWorkspaceRoute(
+        getServerId(),
+        repo.path,
+      )}?open=${encodeURIComponent(`agent:${agent.id}`)}`;
+      await page.goto(agentUrl);
+
+      await waitForPermissionPrompt(page, 120_000);
+
+      await expect(page.getByTestId("permission-plan-card")).toHaveCount(1);
+      await expect(page.getByTestId("timeline-plan-card")).toHaveCount(0);
+
+      await allowPermission(page);
+
+      await expect(page.getByTestId("permission-plan-card")).toHaveCount(0, {
+        timeout: 30_000,
+      });
+      await expect(page.getByTestId("timeline-plan-card")).toHaveCount(0);
+    } finally {
+      await client.close();
+      await repo.cleanup();
+    }
+  });
+});
diff --git a/packages/app/e2e/helpers/terminal-perf.ts b/packages/app/e2e/helpers/terminal-perf.ts
index 8b11d55e6..696cb19b2 100644
--- a/packages/app/e2e/helpers/terminal-perf.ts
+++ b/packages/app/e2e/helpers/terminal-perf.ts
@@ -24,6 +24,10 @@ export interface TerminalPerfDaemonClient {
     cwd: string;
     title?: string;
     modeId?: string;
+    model?: string;
+    thinkingOptionId?: string;
+    featureValues?: Record<string, unknown>;
+    initialPrompt?: string;
   }): Promise<{ id: string; status: string }>;
   sendAgentMessage(agentId: string, text: string): Promise<void>;
   subscribeTerminal(
diff --git a/packages/app/src/components/agent-stream-view.tsx b/packages/app/src/components/agent-stream-view.tsx
index 754c3fa61..40d4bf6f1 100644
--- a/packages/app/src/components/agent-stream-view.tsx
+++ b/packages/app/src/components/agent-stream-view.tsx
@@ -1129,6 +1129,7 @@ function PermissionRequestCard({
         description={description}
         text={planMarkdown}
         footer={footer}
+        testID="permission-plan-card"
         disableOuterSpacing
       />
     );
@@ -1141,7 +1142,12 @@ function PermissionRequestCard({
       {description ? <Text style={permissionStyles.description}>{description}</Text> : null}
 
       {planMarkdown ? (
-        <PlanCard title="Proposed plan" text={planMarkdown} disableOuterSpacing />
+        <PlanCard
+          title="Proposed plan"
+          text={planMarkdown}
+          testID="permission-plan-card"
+          disableOuterSpacing
+        />
       ) : null}
 
       {!isPlanRequest ? (
diff --git a/packages/app/src/components/message.tsx b/packages/app/src/components/message.tsx
index b6146286f..87cc9d4a8 100644
--- a/packages/app/src/components/message.tsx
+++ b/packages/app/src/components/message.tsx
@@ -2973,6 +2973,7 @@ export const ToolCall = memo(function ToolCall({
       <PlanCard
         title="Plan"
         text={effectiveDetail.text}
+        testID="timeline-plan-card"
         disableOuterSpacing={disableOuterSpacing}
       />
     );
diff --git a/packages/app/src/components/plan-card.tsx b/packages/app/src/components/plan-card.tsx
index f21aa5bb4..c512220e8 100644
--- a/packages/app/src/components/plan-card.tsx
+++ b/packages/app/src/components/plan-card.tsx
@@ -199,12 +199,14 @@ export function PlanCard({
   text,
   footer,
   disableOuterSpacing = false,
+  testID,
 }: {
   title?: string;
   description?: string;
   text: string;
   footer?: ReactNode;
   disableOuterSpacing?: boolean;
+  testID?: string;
 }) {
   const { theme } = useUnistyles();
   const markdownStyles = createMarkdownStyles(theme);
@@ -231,7 +233,7 @@ export function PlanCard({
   );
 
   return (
-    <View style={containerStyle}>
+    <View testID={testID} style={containerStyle}>
       <Text style={titleStyle}>{title}</Text>
       {description ? <Text style={descriptionStyle}>{description}</Text> : null}
       <Markdown style={markdownStyles} rules={markdownRules}>
diff --git a/packages/server/src/server/agent/providers/codex-app-server-agent.test.ts b/packages/server/src/server/agent/providers/codex-app-server-agent.test.ts
index 2b7eaf3f1..d4e53ae3c 100644
--- a/packages/server/src/server/agent/providers/codex-app-server-agent.test.ts
+++ b/packages/server/src/server/agent/providers/codex-app-server-agent.test.ts
@@ -770,6 +770,14 @@ describe("Codex app-server provider", () => {
       turn: { status: "completed", error: null },
     });
 
+    expect(
+      events.some(
+        (event) =>
+          event.type === "timeline" &&
+          event.item.type === "tool_call" &&
+          event.item.detail.type === "plan",
+      ),
+    ).toBe(false);
     expect(events.at(-2)).toEqual({
       type: "permission_requested",
       provider: "codex",
@@ -804,6 +812,51 @@ describe("Codex app-server provider", () => {
     });
   });
 
+  test("does not emit Codex plan thread items as timeline cards while plan approval is pending", () => {
+    const session = createSession({
+      featureValues: { plan_mode: true, fast_mode: true },
+    });
+    const events: AgentStreamEvent[] = [];
+    session.subscribe((event) => events.push(event));
+
+    asInternals(session).handleNotification("turn/started", {
+      turn: { id: "turn-plan-thread-item" },
+    });
+    asInternals(session).handleNotification("item/completed", {
+      item: {
+        id: "plan-item-1",
+        type: "plan",
+        text: "- Inspect README\n- Add a short note",
+      },
+    });
+    asInternals(session).handleNotification("turn/completed", {
+      turn: { status: "completed", error: null },
+    });
+
+    expect(events).not.toContainEqual(
+      expect.objectContaining({
+        type: "timeline",
+        item: expect.objectContaining({
+          type: "tool_call",
+          detail: expect.objectContaining({ type: "plan" }),
+        }),
+      }),
+    );
+    expect(events.at(-2)).toEqual({
+      type: "permission_requested",
+      provider: "codex",
+      turnId: "test-turn",
+      request: expect.objectContaining({
+        provider: "codex",
+        name: "CodexPlanApproval",
+        kind: "plan",
+        input: {
+          plan: "- Inspect README\n- Add a short note",
+        },
+      }),
+    });
+  });
+
   test("emits usage_updated on token usage updates and keeps usage on turn completion", () => {
     const session = createSession();
     const events: AgentStreamEvent[] = [];
diff --git a/packages/server/src/server/agent/providers/codex-app-server-agent.ts b/packages/server/src/server/agent/providers/codex-app-server-agent.ts
index ed203dc50..9d5f65b3d 100644
--- a/packages/server/src/server/agent/providers/codex-app-server-agent.ts
+++ b/packages/server/src/server/agent/providers/codex-app-server-agent.ts
@@ -3724,6 +3724,12 @@ class CodexAppServerAgentSession implements AgentSession {
     });
     if (timelineItem) {
       this.rememberPlanResult(timelineItem);
+      // In plan mode, the same plan is rendered through the synthetic approval
+      // permission. Keep the remembered text for that card, but do not also
+      // emit a static timeline plan panel.
+      if (this.planModeEnabled) {
+        return;
+      }
       this.emitEvent({ type: "timeline", provider: CODEX_PROVIDER, item: timelineItem });
     }
   }
@@ -3883,6 +3889,11 @@ class CodexAppServerAgentSession implements AgentSession {
     if (timelineItem.type === "tool_call") {
       if (timelineItem.detail.type === "plan") {
         this.rememberPlanResult(timelineItem);
+        // Codex can surface plans both as turn/plan updates and as completed
+        // thread items. In plan mode, approval owns the visible plan card.
+        if (this.planModeEnabled) {
+          return;
+        }
       }
       this.warnOnIncompleteEditToolCall(timelineItem, "item_completed", parsed.item);
     }