diff --git a/src/main/AryxAppService.ts b/src/main/AryxAppService.ts
index 251a147..a09903d 100644
--- a/src/main/AryxAppService.ts
+++ b/src/main/AryxAppService.ts
@@ -7,6 +7,7 @@ import electron from 'electron';
 import type {
   AgentActivityEvent,
   ApprovalRequestedEvent,
+  ExitPlanModeRequestedEvent,
   RunTurnToolingConfig,
   SidecarCapabilities,
   TurnDeltaEvent,
@@ -584,6 +585,7 @@ export class AryxAppService extends EventEmitter<AppServiceEvents> {
     session.title = resolveSessionTitle(session, effectivePattern, session.messages);
     session.status = 'running';
     session.lastError = undefined;
+    session.pendingPlanReview = undefined;
     session.updatedAt = occurredAt;
     session.runs = [
       createSessionRunRecord({
@@ -613,6 +615,7 @@ export class AryxAppService extends EventEmitter<AppServiceEvents> {
           sessionId: session.id,
           projectPath: project.path,
           workspaceKind,
+          mode: session.interactionMode ?? 'interactive',
           pattern: effectivePattern,
           messages: session.messages,
           tooling: this.buildRunTurnToolingConfig(workspace, session),
@@ -631,6 +634,9 @@ export class AryxAppService extends EventEmitter<AppServiceEvents> {
           await this.handleUserInputRequested(workspace, session.id, requestId, event, (answer, wasFreeform) =>
             this.sidecar.resolveUserInput(event.userInputId, answer, wasFreeform));
         },
+        async (event) => {
+          await this.handleExitPlanModeRequested(workspace, session.id, event);
+        },
       );
 
       await this.awaitFinalResponseApproval(workspace, session.id, requestId, effectivePattern, responseMessages);
@@ -845,6 +851,29 @@ export class AryxAppService extends EventEmitter<AppServiceEvents> {
     return this.persistAndBroadcast(workspace);
   }
 
+  async setSessionInteractionMode(
+    sessionId: string,
+    mode: 'interactive' | 'plan',
+  ): Promise<WorkspaceState> {
+    const workspace = await this.loadWorkspace();
+    const session = this.requireSession(workspace, sessionId);
+
+    session.interactionMode = mode === 'interactive' ? undefined : mode;
+    session.updatedAt = nowIso();
+
+    return this.persistAndBroadcast(workspace);
+  }
+
+  async dismissSessionPlanReview(sessionId: string): Promise<WorkspaceState> {
+    const workspace = await this.loadWorkspace();
+    const session = this.requireSession(workspace, sessionId);
+
+    session.pendingPlanReview = undefined;
+    session.updatedAt = nowIso();
+
+    return this.persistAndBroadcast(workspace);
+  }
+
   async updateSessionTooling(
     sessionId: string,
     enabledMcpServerIds: string[],
@@ -1180,6 +1209,7 @@ export class AryxAppService extends EventEmitter<AppServiceEvents> {
     session.status = 'idle';
     session.lastError = undefined;
     session.pendingUserInput = undefined;
+    session.pendingPlanReview = undefined;
     session.updatedAt = completedAt;
     const completedRun = this.updateSessionRun(session, requestId, (run) =>
       completeSessionRunRecord(run, completedAt));
@@ -1211,6 +1241,7 @@ export class AryxAppService extends EventEmitter<AppServiceEvents> {
     session.status = 'idle';
     session.lastError = undefined;
     session.pendingUserInput = undefined;
+    session.pendingPlanReview = undefined;
     session.updatedAt = cancelledAt;
     const cancelledRun = this.updateSessionRun(session, requestId, (run) =>
       cancelSessionRunRecord(run, cancelledAt));
@@ -1285,6 +1316,30 @@ export class AryxAppService extends EventEmitter<AppServiceEvents> {
     await this.persistAndBroadcast(workspace);
   }
 
+  private async handleExitPlanModeRequested(
+    workspace: WorkspaceState,
+    sessionId: string,
+    event: ExitPlanModeRequestedEvent,
+  ): Promise<void> {
+    const session = this.requireSession(workspace, sessionId);
+    const requestedAt = nowIso();
+
+    session.pendingPlanReview = {
+      id: event.exitPlanId,
+      status: 'pending',
+      agentId: event.agentId,
+      agentName: event.agentName,
+      summary: event.summary,
+      planContent: event.planContent,
+      actions: event.actions,
+      recommendedAction: event.recommendedAction,
+      requestedAt,
+    };
+    session.updatedAt = requestedAt;
+
+    await this.persistAndBroadcast(workspace);
+  }
+
   private createPendingApprovalFromSidecarEvent(event: ApprovalRequestedEvent): PendingApprovalRecord {
     return {
       id: event.approvalId,
diff --git a/src/main/ipc/registerIpcHandlers.ts b/src/main/ipc/registerIpcHandlers.ts
index 28807a7..a386925 100644
--- a/src/main/ipc/registerIpcHandlers.ts
+++ b/src/main/ipc/registerIpcHandlers.ts
@@ -7,6 +7,7 @@ import type {
   CreateSessionInput,
   ResolveProjectDiscoveredToolingInput,
   ResolveWorkspaceDiscoveredToolingInput,
+  DismissSessionPlanReviewInput,
   DuplicateSessionInput,
   RenameSessionInput,
   RescanProjectConfigsInput,
@@ -18,6 +19,7 @@ import type {
   SendSessionMessageInput,
   SetPatternFavoriteInput,
   SetSessionArchivedInput,
+  SetSessionInteractionModeInput,
   SetSessionPinnedInput,
   UpdateSessionApprovalSettingsInput,
   UpdateSessionToolingInput,
@@ -114,6 +116,12 @@ export function registerIpcHandlers(window: BrowserWindow, service: AryxAppServi
   ipcMain.handle(ipcChannels.resolveSessionUserInput, (_event, input: ResolveSessionUserInputInput) =>
     service.resolveSessionUserInput(input.sessionId, input.userInputId, input.answer, input.wasFreeform),
   );
+  ipcMain.handle(ipcChannels.setSessionInteractionMode, (_event, input: SetSessionInteractionModeInput) =>
+    service.setSessionInteractionMode(input.sessionId, input.mode),
+  );
+  ipcMain.handle(ipcChannels.dismissSessionPlanReview, (_event, input: DismissSessionPlanReviewInput) =>
+    service.dismissSessionPlanReview(input.sessionId),
+  );
   ipcMain.handle(
     ipcChannels.updateSessionModelConfig,
     (_event, input: UpdateSessionModelConfigInput) =>
diff --git a/src/main/sidecar/runTurnPending.ts b/src/main/sidecar/runTurnPending.ts
index 4f17115..8c9d68f 100644
--- a/src/main/sidecar/runTurnPending.ts
+++ b/src/main/sidecar/runTurnPending.ts
@@ -1,6 +1,7 @@
 import type {
   AgentActivityEvent,
   ApprovalRequestedEvent,
+  ExitPlanModeRequestedEvent,
   TurnDeltaEvent,
   UserInputRequestedEvent,
 } from '@shared/contracts/sidecar';
@@ -14,6 +15,7 @@ export interface RunTurnPendingCommand {
   onActivity: (event: AgentActivityEvent) => void | Promise<void>;
   onApproval: (event: ApprovalRequestedEvent) => void | Promise<void>;
   onUserInput: (event: UserInputRequestedEvent) => void | Promise<void>;
+  onExitPlanMode: (event: ExitPlanModeRequestedEvent) => void | Promise<void>;
   errored: boolean;
 }
 
diff --git a/src/main/sidecar/sidecarProcess.ts b/src/main/sidecar/sidecarProcess.ts
index 5bf75d8..52dd10d 100644
--- a/src/main/sidecar/sidecarProcess.ts
+++ b/src/main/sidecar/sidecarProcess.ts
@@ -10,6 +10,7 @@ import type {
   SidecarEvent,
   TurnDeltaEvent,
   UserInputRequestedEvent,
+  ExitPlanModeRequestedEvent,
   ValidatePatternCommand,
   RunTurnCommand,
 } from '@shared/contracts/sidecar';
@@ -102,8 +103,9 @@ export class SidecarClient {
     onActivity: (event: AgentActivityEvent) => void | Promise<void>,
     onApproval: (event: ApprovalRequestedEvent) => void | Promise<void>,
     onUserInput: (event: UserInputRequestedEvent) => void | Promise<void>,
+    onExitPlanMode: (event: ExitPlanModeRequestedEvent) => void | Promise<void>,
   ): Promise<ChatMessageRecord[]> {
-    return this.dispatch<ChatMessageRecord[]>(command, onDelta, onActivity, onApproval, onUserInput);
+    return this.dispatch<ChatMessageRecord[]>(command, onDelta, onActivity, onApproval, onUserInput, onExitPlanMode);
   }
 
   async resolveUserInput(userInputId: string, answer: string, wasFreeform: boolean): Promise<void> {
@@ -218,6 +220,7 @@ export class SidecarClient {
     onActivity?: (event: AgentActivityEvent) => void | Promise<void>,
     onApproval?: (event: ApprovalRequestedEvent) => void | Promise<void>,
     onUserInput?: (event: UserInputRequestedEvent) => void | Promise<void>,
+    onExitPlanMode?: (event: ExitPlanModeRequestedEvent) => void | Promise<void>,
   ): Promise<TResult> {
     const state = await this.ensureProcess();
 
@@ -232,6 +235,7 @@ export class SidecarClient {
           onActivity: onActivity ?? (() => undefined),
           onApproval: onApproval ?? (() => undefined),
           onUserInput: onUserInput ?? (() => undefined),
+          onExitPlanMode: onExitPlanMode ?? (() => undefined),
           errored: false,
         });
       } else if (command.type === 'validate-pattern') {
@@ -329,6 +333,11 @@ export class SidecarClient {
           this.invokeRunTurnHandler(event.requestId, pending, () => pending.onUserInput(event));
         }
         return;
+      case 'exit-plan-mode-requested':
+        if (pending.kind === 'run-turn' && shouldHandleRunTurnEvent(pending)) {
+          this.invokeRunTurnHandler(event.requestId, pending, () => pending.onExitPlanMode(event));
+        }
+        return;
       case 'turn-complete':
         if (pending.kind === 'run-turn') {
           if (shouldHandleRunTurnEvent(pending)) {
diff --git a/src/preload/index.ts b/src/preload/index.ts
index d685022..219f77c 100644
--- a/src/preload/index.ts
+++ b/src/preload/index.ts
@@ -37,6 +37,8 @@ const api: ElectronApi = {
   cancelSessionTurn: (input) => ipcRenderer.invoke(ipcChannels.cancelSessionTurn, input),
   resolveSessionApproval: (input) => ipcRenderer.invoke(ipcChannels.resolveSessionApproval, input),
   resolveSessionUserInput: (input) => ipcRenderer.invoke(ipcChannels.resolveSessionUserInput, input),
+  setSessionInteractionMode: (input) => ipcRenderer.invoke(ipcChannels.setSessionInteractionMode, input),
+  dismissSessionPlanReview: (input) => ipcRenderer.invoke(ipcChannels.dismissSessionPlanReview, input),
   updateSessionModelConfig: (input) =>
     ipcRenderer.invoke(ipcChannels.updateSessionModelConfig, input),
   querySessions: (input) => ipcRenderer.invoke(ipcChannels.querySessions, input),
diff --git a/src/renderer/App.tsx b/src/renderer/App.tsx
index 9e47935..fda2253 100644
--- a/src/renderer/App.tsx
+++ b/src/renderer/App.tsx
@@ -253,6 +253,12 @@ export default function App() {
           onResolveUserInput={(userInputId, answer, wasFreeform) =>
             api.resolveSessionUserInput({ sessionId: selectedSession.id, userInputId, answer, wasFreeform })
           }
+          onSetInteractionMode={(mode) => {
+            void api.setSessionInteractionMode({ sessionId: selectedSession.id, mode });
+          }}
+          onDismissPlanReview={() => {
+            void api.dismissSessionPlanReview({ sessionId: selectedSession.id });
+          }}
           onUpdateSessionModelConfig={(config) =>
             api.updateSessionModelConfig({
               sessionId: selectedSession.id,
diff --git a/src/renderer/components/ChatPane.tsx b/src/renderer/components/ChatPane.tsx
index 951555e..ce09e61 100644
--- a/src/renderer/components/ChatPane.tsx
+++ b/src/renderer/components/ChatPane.tsx
@@ -1,14 +1,16 @@
 import { useEffect, useMemo, useRef, useState } from 'react';
-import { AlertCircle, ArrowUp, Bot, Circle, GitBranch, Loader2, MessageCircleQuestion, ShieldAlert, Square, User } from 'lucide-react';
+import { AlertCircle, ArrowUp, Bot, Circle, ClipboardList, GitBranch, Loader2, MessageCircleQuestion, ShieldAlert, Square, User } from 'lucide-react';
 
 import { MarkdownContent } from '@renderer/components/MarkdownContent';
 import { MarkdownComposer, type MarkdownComposerHandle } from '@renderer/components/MarkdownComposer';
 import { ApprovalBanner, QueuedApprovalsList } from '@renderer/components/chat/ApprovalBanner';
+import { PlanReviewBanner } from '@renderer/components/chat/PlanReviewBanner';
 import { UserInputBanner } from '@renderer/components/chat/UserInputBanner';
 import { InlineApprovalPill, InlineModelPill, InlineThinkingPill, InlineToolsPill } from '@renderer/components/chat/InlinePills';
 import { ThinkingDots } from '@renderer/components/chat/ThinkingDots';
 import { getAssistantMessagePhase } from '@renderer/lib/messagePhase';
 import type { ApprovalDecision } from '@shared/domain/approval';
+import type { InteractionMode } from '@shared/contracts/sidecar';
 import {
   findModel,
   getSupportedReasoningEfforts,
@@ -38,6 +40,8 @@ interface ChatPaneProps {
   onCancelTurn?: () => void;
   onResolveApproval?: (approvalId: string, decision: ApprovalDecision) => Promise<unknown>;
   onResolveUserInput?: (userInputId: string, answer: string, wasFreeform: boolean) => Promise<unknown>;
+  onSetInteractionMode?: (mode: InteractionMode) => void;
+  onDismissPlanReview?: () => void;
   onUpdateSessionModelConfig?: (config: {
     model: string;
     reasoningEffort?: ReasoningEffort;
@@ -57,6 +61,8 @@ export function ChatPane({
   onCancelTurn,
   onResolveApproval,
   onResolveUserInput,
+  onSetInteractionMode,
+  onDismissPlanReview,
   onUpdateSessionModelConfig,
   onUpdateSessionTooling,
   onUpdateSessionApprovalSettings,
@@ -75,6 +81,9 @@ export function ChatPane({
   const queuedApprovals = (session.pendingApprovalQueue ?? []).filter((a) => a.status === 'pending');
   const totalPendingCount = (pendingApproval ? 1 : 0) + queuedApprovals.length;
   const pendingUserInput = session.pendingUserInput?.status === 'pending' ? session.pendingUserInput : undefined;
+  const pendingPlanReview = session.pendingPlanReview?.status === 'pending' ? session.pendingPlanReview : undefined;
+  const interactionMode: InteractionMode = session.interactionMode ?? 'interactive';
+  const isPlanMode = interactionMode === 'plan';
   const isScratchpad = isScratchpadProject(project);
   const isSingleAgent = pattern.agents.length === 1;
   const primaryAgent = pattern.agents[0];
@@ -121,6 +130,16 @@ export function ChatPane({
     void onSend(content);
   }
 
+  function handleImplementPlan() {
+    if (!pendingPlanReview) return;
+    onDismissPlanReview?.();
+    void onSend('Implement the plan.');
+  }
+
+  function handleDismissPlan() {
+    onDismissPlanReview?.();
+  }
+
   async function handleSessionModelConfigChange(config: {
     model: string;
     reasoningEffort?: ReasoningEffort;
@@ -375,6 +394,17 @@ export function ChatPane({
             </div>
           )}
 
+          {/* Plan review banner */}
+          {pendingPlanReview && (
+            <div className="mb-3">
+              <PlanReviewBanner
+                onDismiss={handleDismissPlan}
+                onImplement={handleImplementPlan}
+                planReview={pendingPlanReview}
+              />
+            </div>
+          )}
+
           {/* Session config pills — tools/approval left, model/reasoning right */}
           {isSingleAgent && (
             <div className="mb-2 flex items-center gap-2">
@@ -396,6 +426,22 @@ export function ChatPane({
                   onUpdate={onUpdateSessionApprovalSettings}
                 />
               )}
+              {onSetInteractionMode && (
+                <button
+                  aria-pressed={isPlanMode}
+                  className={`inline-flex items-center gap-1 rounded-lg border px-2.5 py-1 text-[11px] font-medium transition ${
+                    isPlanMode
+                      ? 'border-emerald-500/40 bg-emerald-500/15 text-emerald-300 hover:bg-emerald-500/25'
+                      : 'border-zinc-700 text-zinc-400 hover:border-zinc-600 hover:text-zinc-300'
+                  }`}
+                  disabled={isComposerDisabled}
+                  onClick={() => onSetInteractionMode(isPlanMode ? 'interactive' : 'plan')}
+                  type="button"
+                >
+                  <ClipboardList className="size-3" />
+                  Plan
+                </button>
+              )}
               {primaryAgent && (
                 <div className="ml-auto flex items-center gap-2">
                   <InlineModelPill
@@ -464,11 +510,15 @@ export function ChatPane({
                   ? 'Awaiting approval...'
                   : pendingUserInput
                     ? 'Awaiting your input above...'
-                    : isSessionBusy
-                      ? 'Waiting for response...'
-                      : isUpdatingSessionModelConfig
-                        ? 'Saving model settings...'
-                        : 'Message...'
+                    : pendingPlanReview
+                      ? 'Review the plan above...'
+                      : isSessionBusy
+                        ? 'Waiting for response...'
+                        : isUpdatingSessionModelConfig
+                          ? 'Saving model settings...'
+                          : isPlanMode
+                            ? 'Describe what to plan...'
+                            : 'Message...'
               }
             >
               <button
diff --git a/src/renderer/components/chat/PlanReviewBanner.tsx b/src/renderer/components/chat/PlanReviewBanner.tsx
new file mode 100644
index 0000000..f0a8166
--- /dev/null
+++ b/src/renderer/components/chat/PlanReviewBanner.tsx
@@ -0,0 +1,89 @@
+import { useCallback } from 'react';
+import { ClipboardList, Play, X } from 'lucide-react';
+
+import { MarkdownContent } from '@renderer/components/MarkdownContent';
+import type { PendingPlanReviewRecord } from '@shared/domain/planReview';
+
+export function PlanReviewBanner({
+  planReview,
+  onImplement,
+  onDismiss,
+}: {
+  planReview: PendingPlanReviewRecord;
+  onImplement: (planReview: PendingPlanReviewRecord) => void;
+  onDismiss: (planReview: PendingPlanReviewRecord) => void;
+}) {
+  const handleImplement = useCallback(() => {
+    onImplement(planReview);
+  }, [planReview, onImplement]);
+
+  const handleDismiss = useCallback(() => {
+    onDismiss(planReview);
+  }, [planReview, onDismiss]);
+
+  return (
+    <div className="rounded-xl border border-emerald-500/30 bg-emerald-500/5 px-4 py-3" role="alert">
+      {/* Header */}
+      <div className="flex items-start gap-2.5">
+        <ClipboardList className="mt-0.5 size-4 shrink-0 text-emerald-400" />
+        <div className="min-w-0 flex-1">
+          <div className="flex items-center justify-between gap-2">
+            <div className="flex items-center gap-2">
+              <span className="text-[13px] font-semibold text-emerald-200">Plan ready for review</span>
+              <span className="rounded-full bg-emerald-500/15 px-2 py-0.5 text-[9px] font-semibold uppercase tracking-wider text-emerald-400">
+                Plan mode
+              </span>
+            </div>
+            <button
+              aria-label="Dismiss plan"
+              className="rounded p-0.5 text-zinc-500 transition hover:bg-zinc-700/50 hover:text-zinc-300"
+              onClick={handleDismiss}
+              type="button"
+            >
+              <X className="size-3.5" />
+            </button>
+          </div>
+
+          {planReview.agentName && (
+            <div className="mt-1 text-[11px] text-zinc-400">
+              Agent: <span className="text-zinc-300">{planReview.agentName}</span>
+            </div>
+          )}
+
+          {/* Summary */}
+          {planReview.summary && (
+            <p className="mt-2 text-[13px] leading-relaxed text-zinc-200">
+              {planReview.summary}
+            </p>
+          )}
+
+          {/* Plan content (rendered markdown) */}
+          {planReview.planContent && (
+            <div className="mt-3 max-h-80 overflow-y-auto rounded-lg border border-zinc-700/50 bg-zinc-900/60 p-3">
+              <MarkdownContent content={planReview.planContent} />
+            </div>
+          )}
+        </div>
+      </div>
+
+      {/* Actions */}
+      <div className="mt-3 flex items-center gap-2">
+        <button
+          className="inline-flex items-center gap-1.5 rounded-lg bg-emerald-600 px-3.5 py-1.5 text-[12px] font-medium text-white transition hover:bg-emerald-500"
+          onClick={handleImplement}
+          type="button"
+        >
+          <Play className="size-3" />
+          Implement this plan
+        </button>
+        <button
+          className="rounded-lg border border-zinc-600 px-3.5 py-1.5 text-[12px] font-medium text-zinc-300 transition hover:border-zinc-500 hover:bg-zinc-800 hover:text-white"
+          onClick={handleDismiss}
+          type="button"
+        >
+          Dismiss
+        </button>
+      </div>
+    </div>
+  );
+}
diff --git a/src/shared/contracts/channels.ts b/src/shared/contracts/channels.ts
index c6e3c1b..02b76ae 100644
--- a/src/shared/contracts/channels.ts
+++ b/src/shared/contracts/channels.ts
@@ -27,6 +27,8 @@ export const ipcChannels = {
   cancelSessionTurn: 'sessions:cancel-turn',
   resolveSessionApproval: 'sessions:resolve-approval',
   resolveSessionUserInput: 'sessions:resolve-user-input',
+  setSessionInteractionMode: 'sessions:set-interaction-mode',
+  dismissSessionPlanReview: 'sessions:dismiss-plan-review',
   querySessions: 'sessions:query',
   updateSessionModelConfig: 'sessions:update-model-config',
   selectProject: 'selection:project',
diff --git a/src/shared/contracts/ipc.ts b/src/shared/contracts/ipc.ts
index 79ba60b..467114f 100644
--- a/src/shared/contracts/ipc.ts
+++ b/src/shared/contracts/ipc.ts
@@ -1,5 +1,5 @@
 import type { ApprovalDecision } from '@shared/domain/approval';
-import type { SidecarCapabilities } from '@shared/contracts/sidecar';
+import type { SidecarCapabilities, InteractionMode } from '@shared/contracts/sidecar';
 import type { PatternDefinition, ReasoningEffort } from '@shared/domain/pattern';
 import type { ProjectRecord } from '@shared/domain/project';
 import type { QuerySessionsInput, SessionQueryResult } from '@shared/domain/sessionLibrary';
@@ -107,6 +107,15 @@ export interface UpdateSessionApprovalSettingsInput {
   autoApprovedToolNames?: string[];
 }
 
+export interface SetSessionInteractionModeInput {
+  sessionId: string;
+  mode: InteractionMode;
+}
+
+export interface DismissSessionPlanReviewInput {
+  sessionId: string;
+}
+
 export interface ElectronApi {
   describeSidecarCapabilities(): Promise<SidecarCapabilities>;
   refreshSidecarCapabilities(): Promise<SidecarCapabilities>;
@@ -134,6 +143,8 @@ export interface ElectronApi {
   cancelSessionTurn(input: CancelSessionTurnInput): Promise<void>;
   resolveSessionApproval(input: ResolveSessionApprovalInput): Promise<WorkspaceState>;
   resolveSessionUserInput(input: ResolveSessionUserInputInput): Promise<WorkspaceState>;
+  setSessionInteractionMode(input: SetSessionInteractionModeInput): Promise<WorkspaceState>;
+  dismissSessionPlanReview(input: DismissSessionPlanReviewInput): Promise<WorkspaceState>;
   updateSessionModelConfig(input: UpdateSessionModelConfigInput): Promise<WorkspaceState>;
   querySessions(input: QuerySessionsInput): Promise<SessionQueryResult[]>;
   selectProject(projectId?: string): Promise<WorkspaceState>;
diff --git a/src/shared/contracts/sidecar.ts b/src/shared/contracts/sidecar.ts
index 2adeba2..ce9c645 100644
--- a/src/shared/contracts/sidecar.ts
+++ b/src/shared/contracts/sidecar.ts
@@ -68,12 +68,15 @@ export interface ValidatePatternCommand {
   pattern: PatternDefinition;
 }
 
+export type InteractionMode = 'interactive' | 'plan';
+
 export interface RunTurnCommand {
   type: 'run-turn';
   requestId: string;
   sessionId: string;
   projectPath: string;
   workspaceKind?: 'project' | 'scratchpad';
+  mode?: InteractionMode;
   pattern: PatternDefinition;
   messages: ChatMessageRecord[];
   tooling?: RunTurnToolingConfig;
@@ -241,6 +244,19 @@ export interface UserInputRequestedEvent {
   allowFreeform?: boolean;
 }
 
+export interface ExitPlanModeRequestedEvent {
+  type: 'exit-plan-mode-requested';
+  requestId: string;
+  sessionId: string;
+  exitPlanId: string;
+  agentId?: string;
+  agentName?: string;
+  summary: string;
+  planContent: string;
+  actions?: string[];
+  recommendedAction?: string;
+}
+
 export interface CommandErrorEvent {
   type: 'command-error';
   requestId: string;
@@ -260,5 +276,6 @@ export type SidecarEvent =
   | AgentActivityEvent
   | ApprovalRequestedEvent
   | UserInputRequestedEvent
+  | ExitPlanModeRequestedEvent
   | CommandErrorEvent
   | CommandCompleteEvent;
diff --git a/src/shared/domain/planReview.ts b/src/shared/domain/planReview.ts
new file mode 100644
index 0000000..6c75e78
--- /dev/null
+++ b/src/shared/domain/planReview.ts
@@ -0,0 +1,14 @@
+export type PlanReviewStatus = 'pending' | 'acted';
+
+export interface PendingPlanReviewRecord {
+  id: string;
+  status: PlanReviewStatus;
+  agentId?: string;
+  agentName?: string;
+  summary: string;
+  planContent: string;
+  actions?: string[];
+  recommendedAction?: string;
+  requestedAt: string;
+  actedAt?: string;
+}
diff --git a/src/shared/domain/session.ts b/src/shared/domain/session.ts
index f54dcc7..7741f40 100644
--- a/src/shared/domain/session.ts
+++ b/src/shared/domain/session.ts
@@ -12,6 +12,8 @@ import {
 } from '@shared/domain/approval';
 import type { SessionRunRecord } from '@shared/domain/runTimeline';
 import type { PendingUserInputRecord } from '@shared/domain/userInput';
+import type { PendingPlanReviewRecord } from '@shared/domain/planReview';
+import type { InteractionMode } from '@shared/contracts/sidecar';
 
 export type ChatRole = 'system' | 'user' | 'assistant';
 export type SessionStatus = 'idle' | 'running' | 'error';
@@ -42,6 +44,7 @@ export interface SessionRecord {
   status: SessionStatus;
   isPinned?: boolean;
   isArchived?: boolean;
+  interactionMode?: InteractionMode;
   messages: ChatMessageRecord[];
   lastError?: string;
   sessionModelConfig?: SessionModelConfig;
@@ -50,6 +53,7 @@ export interface SessionRecord {
   pendingApproval?: PendingApprovalRecord;
   pendingApprovalQueue?: PendingApprovalRecord[];
   pendingUserInput?: PendingUserInputRecord;
+  pendingPlanReview?: PendingPlanReviewRecord;
   runs: SessionRunRecord[];
 }
 
diff --git a/tests/main/runTurnPending.test.ts b/tests/main/runTurnPending.test.ts
index f472da2..93a4f3a 100644
--- a/tests/main/runTurnPending.test.ts
+++ b/tests/main/runTurnPending.test.ts
@@ -17,6 +17,7 @@ describe('run turn pending helpers', () => {
       onActivity: () => undefined,
       onApproval: () => undefined,
       onUserInput: () => undefined,
+      onExitPlanMode: () => undefined,
       errored: false,
     };
 
@@ -40,6 +41,7 @@ describe('run turn pending helpers', () => {
       onActivity: () => undefined,
       onApproval: () => undefined,
       onUserInput: () => undefined,
+      onExitPlanMode: () => undefined,
       errored: false,
     };