fix(cli): reset plan session state on /clear (#25515)

packages/cli/src/test-utils/mockConfig.ts

@@ -44,6 +44,7 @@ export const createMockConfig = (overrides: Partial<Config> = {}): Config =>
     getListSessions: vi.fn(() => false),
     getDeleteSession: vi.fn(() => undefined),
     setSessionId: vi.fn(),
+    resetNewSessionState: vi.fn(),
     getSessionId: vi.fn().mockReturnValue('mock-session-id'),
     getWorktreeSettings: vi.fn(() => undefined),
     getContentGeneratorConfig: vi.fn(() => ({ authType: 'google' })),

packages/cli/src/ui/commands/clearCommand.test.ts

@@ -39,7 +39,7 @@ describe('clearCommand', () => {
         agentContext: {
           config: {
             getEnableHooks: vi.fn().mockReturnValue(false),
-            setSessionId: vi.fn(),
+            resetNewSessionState: vi.fn(),
             getMessageBus: vi.fn().mockReturnValue(undefined),
             getHookSystem: vi.fn().mockReturnValue({
               fireSessionEndEvent: vi.fn().mockResolvedValue(undefined),
@@ -74,6 +74,9 @@ describe('clearCommand', () => {
 
     expect(mockResetChat).toHaveBeenCalledTimes(1);
     expect(mockHintClear).toHaveBeenCalledTimes(1);
+    expect(
+      mockContext.services.agentContext?.config.resetNewSessionState,
+    ).toHaveBeenCalledTimes(1);
     expect(uiTelemetryService.clear).toHaveBeenCalled();
     expect(uiTelemetryService.clear).toHaveBeenCalledTimes(1);
     expect(mockContext.ui.clear).toHaveBeenCalledTimes(1);

packages/cli/src/ui/commands/clearCommand.ts

@@ -39,7 +39,7 @@ export const clearCommand: SlashCommand = {
     let newSessionId: string | undefined;
     if (config) {
       newSessionId = randomUUID();
-      config.setSessionId(newSessionId);
+      config.resetNewSessionState(newSessionId);
     }
 
     if (geminiClient) {