Add session subtask in /stats command (#13750)

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

@@ -13,12 +13,7 @@ import {
   CommandKind,
 } from './types.js';
 
-export const statsCommand: SlashCommand = {
+function defaultSessionView(context: CommandContext) {
-  name: 'stats',
-  altNames: ['usage'],
-  description: 'Check session stats. Usage: /stats [model|tools]',
-  kind: CommandKind.BUILT_IN,
-  action: (context: CommandContext) => {
   const now = new Date();
   const { sessionStartTime } = context.session.stats;
   if (!sessionStartTime) {
@@ -39,8 +34,25 @@ export const statsCommand: SlashCommand = {
   };
 
   context.ui.addItem(statsItem, Date.now());
+}
+
+export const statsCommand: SlashCommand = {
+  name: 'stats',
+  altNames: ['usage'],
+  description: 'Check session stats. Usage: /stats [session|model|tools]',
+  kind: CommandKind.BUILT_IN,
+  action: (context: CommandContext) => {
+    defaultSessionView(context);
   },
   subCommands: [
+    {
+      name: 'session',
+      description: 'Show session-specific usage statistics',
+      kind: CommandKind.BUILT_IN,
+      action: (context: CommandContext) => {
+        defaultSessionView(context);
+      },
+    },
     {
       name: 'model',
       description: 'Show model-specific usage statistics',

packages/cli/src/ui/hooks/useSlashCompletion.test.ts

@@ -183,7 +183,8 @@ describe('useSlashCompletion', () => {
         createTestCommand({
           name: 'stats',
           altNames: ['usage'],
-          description: 'check session stats. Usage: /stats [model|tools]',
+          description:
+            'check session stats. Usage: /stats [session|model|tools]',
         }),
         createTestCommand({ name: 'clear', description: 'Clear the screen' }),
         createTestCommand({
@@ -282,7 +283,8 @@ describe('useSlashCompletion', () => {
         createTestCommand({
           name: 'stats',
           altNames: ['usage'],
-          description: 'check session stats. Usage: /stats [model|tools]',
+          description:
+            'check session stats. Usage: /stats [session|model|tools]',
         }),
       ];
       let result: {
@@ -307,7 +309,8 @@ describe('useSlashCompletion', () => {
           {
             label: 'stats',
             value: 'stats',
-            description: 'check session stats. Usage: /stats [model|tools]',
+            description:
+              'check session stats. Usage: /stats [session|model|tools]',
             commandKind: CommandKind.BUILT_IN,
           },
         ]);
@@ -360,7 +363,8 @@ describe('useSlashCompletion', () => {
           createTestCommand({
             name: 'stats',
             altNames: ['usage'],
-            description: 'check session stats. Usage: /stats [model|tools]',
+            description:
+              'check session stats. Usage: /stats [session|model|tools]',
             action: vi.fn(),
           }),
         ];