feat: add /context command to display context window token usage breakdown

docs/users/features/commands.md

@@ -33,6 +33,7 @@ Commands for adjusting interface appearance and work environment.
 | Command      | Description                              | Usage Examples                |
 | ------------ | ---------------------------------------- | ----------------------------- |
 | `/clear`     | Clear terminal screen content            | `/clear` (shortcut: `Ctrl+L`) |
+| `/context`   | Show context window usage breakdown      | `/context`                    |
 | `/theme`     | Change Qwen Code visual theme            | `/theme`                      |
 | `/vim`       | Turn input area Vim editing mode on/off  | `/vim`                        |
 | `/directory` | Manage multi-directory support workspace | `/dir add ./src,./tests`      |

packages/cli/src/i18n/locales/de.js

@@ -1459,4 +1459,27 @@ export default {
     '{{region}}-Konfiguration erfolgreich aktualisiert. Modell auf "{{model}}" umgeschaltet.',
   'Authenticated successfully with {{region}}. API key and model configs saved to settings.json (backed up).':
     'Erfolgreich mit {{region}} authentifiziert. API-Schlüssel und Modellkonfigurationen wurden in settings.json gespeichert (gesichert).',
+
+  // ============================================================================
+  // Context Usage Component
+  // ============================================================================
+  'Context Usage': 'Kontextnutzung',
+  'No API response yet. Send a message to see actual usage.':
+    'Noch keine API-Antwort. Senden Sie eine Nachricht, um die tatsächliche Nutzung anzuzeigen.',
+  'Estimated pre-conversation overhead':
+    'Geschätzte Vorabkosten vor der Unterhaltung',
+  'Context window': 'Kontextfenster',
+  tokens: 'Tokens',
+  Used: 'Verwendet',
+  Free: 'Frei',
+  'Autocompact buffer': 'Autokomprimierungs-Puffer',
+  'Usage by category': 'Verwendung nach Kategorie',
+  'System prompt': 'System-Prompt',
+  'Built-in tools': 'Integrierte Tools',
+  'MCP tools': 'MCP-Tools',
+  'Memory files': 'Speicherdateien',
+  Skills: 'Fähigkeiten',
+  Messages: 'Nachrichten',
+  'Show context window usage breakdown.':
+    'Zeigt die Aufschlüsselung der Kontextfenster-Nutzung an.',
 };

packages/cli/src/i18n/locales/en.js

@@ -1448,4 +1448,26 @@ export default {
     '{{region}} configuration updated successfully. Model switched to "{{model}}".',
   'Authenticated successfully with {{region}}. API key and model configs saved to settings.json (backed up).':
     'Authenticated successfully with {{region}}. API key and model configs saved to settings.json (backed up).',
+
+  // ============================================================================
+  // Context Usage Component
+  // ============================================================================
+  'Context Usage': 'Context Usage',
+  'No API response yet. Send a message to see actual usage.':
+    'No API response yet. Send a message to see actual usage.',
+  'Estimated pre-conversation overhead': 'Estimated pre-conversation overhead',
+  'Context window': 'Context window',
+  tokens: 'tokens',
+  Used: 'Used',
+  Free: 'Free',
+  'Autocompact buffer': 'Autocompact buffer',
+  'Usage by category': 'Usage by category',
+  'System prompt': 'System prompt',
+  'Built-in tools': 'Built-in tools',
+  'MCP tools': 'MCP tools',
+  'Memory files': 'Memory files',
+  Skills: 'Skills',
+  Messages: 'Messages',
+  'Show context window usage breakdown.':
+    'Show context window usage breakdown.',
 };

packages/cli/src/i18n/locales/ja.js

@@ -965,5 +965,27 @@ export default {
   '{{region}} configuration updated successfully. Model switched to "{{model}}".':
     '{{region}} の設定が正常に更新されました。モデルが "{{model}}" に切り替わりました。',
   'Authenticated successfully with {{region}}. API key and model configs saved to settings.json (backed up).':
-    '{{region}} での認証に成功しました。APIキーとモデル設定が settings.json に保存されました（バックアップ済み）。',
+    '{{region}} での認証に成功しました。API キーとモデル設定が settings.json に保存されました（バックアップ済み）。',
+
+  // ============================================================================
+  // Context Usage Component
+  // ============================================================================
+  'Context Usage': 'コンテキスト使用量',
+  'No API response yet. Send a message to see actual usage.':
+    'API応答はありません。メッセージを送信して実際の使用量を確認してください。',
+  'Estimated pre-conversation overhead': '推定事前会話オーバーヘッド',
+  'Context window': 'コンテキストウィンドウ',
+  tokens: 'トークン',
+  Used: '使用済み',
+  Free: '空き',
+  'Autocompact buffer': '自動圧縮バッファ',
+  'Usage by category': 'カテゴリ別の使用量',
+  'System prompt': 'システムプロンプト',
+  'Built-in tools': '組み込みツール',
+  'MCP tools': 'MCPツール',
+  'Memory files': 'メモリファイル',
+  Skills: 'スキル',
+  Messages: 'メッセージ',
+  'Show context window usage breakdown.':
+    'コンテキストウィンドウの使用状況を表示します。',
 };

packages/cli/src/i18n/locales/pt.js

@@ -1453,4 +1453,26 @@ export default {
     'Configuração do {{region}} atualizada com sucesso. Modelo alterado para "{{model}}".',
   'Authenticated successfully with {{region}}. API key and model configs saved to settings.json (backed up).':
     'Autenticado com sucesso com {{region}}. Chave de API e configurações de modelo salvas em settings.json (com backup).',
+
+  // ============================================================================
+  // Context Usage Component
+  // ============================================================================
+  'Context Usage': 'Uso do Contexto',
+  'No API response yet. Send a message to see actual usage.':
+    'Ainda não há resposta da API. Envie uma mensagem para ver o uso real.',
+  'Estimated pre-conversation overhead': 'Sobrecarga estimada pré-conversa',
+  'Context window': 'Janela de Contexto',
+  tokens: 'tokens',
+  Used: 'Usado',
+  Free: 'Livre',
+  'Autocompact buffer': 'Buffer de autocompactação',
+  'Usage by category': 'Uso por categoria',
+  'System prompt': 'Prompt do sistema',
+  'Built-in tools': 'Ferramentas integradas',
+  'MCP tools': 'Ferramentas MCP',
+  'Memory files': 'Arquivos de memória',
+  Skills: 'Habilidades',
+  Messages: 'Mensagens',
+  'Show context window usage breakdown.':
+    'Exibe a divisão de uso da janela de contexto.',
 };

packages/cli/src/i18n/locales/ru.js

@@ -1463,4 +1463,27 @@ export default {
     'Конфигурация {{region}} успешно обновлена. Модель переключена на "{{model}}".',
   'Authenticated successfully with {{region}}. API key and model configs saved to settings.json (backed up).':
     'Успешная аутентификация с {{region}}. API-ключ и конфигурации моделей сохранены в settings.json (резервная копия создана).',
+
+  // ============================================================================
+  // Context Usage Component
+  // ============================================================================
+  'Context Usage': 'Использование контекста',
+  'No API response yet. Send a message to see actual usage.':
+    'Пока нет ответа от API. Отправьте сообщение, чтобы увидеть фактическое использование.',
+  'Estimated pre-conversation overhead':
+    'Оценочные накладные расходы перед беседой',
+  'Context window': 'Контекстное окно',
+  tokens: 'токенов',
+  Used: 'Использовано',
+  Free: 'Свободно',
+  'Autocompact buffer': 'Буфер автоупаковки',
+  'Usage by category': 'Использование по категориям',
+  'System prompt': 'Системная подсказка',
+  'Built-in tools': 'Встроенные инструменты',
+  'MCP tools': 'Инструменты MCP',
+  'Memory files': 'Файлы памяти',
+  Skills: 'Навыки',
+  Messages: 'Сообщения',
+  'Show context window usage breakdown.':
+    'Показать разбивку использования контекстного окна.',
 };

packages/cli/src/i18n/locales/zh.js

@@ -1281,4 +1281,25 @@ export default {
     '{{region}} 配置更新成功。模型已切换至 "{{model}}"。',
   'Authenticated successfully with {{region}}. API key and model configs saved to settings.json (backed up).':
     '成功通过 {{region}} 认证。API Key 和模型配置已保存至 settings.json（已备份）。',
+
+  // ============================================================================
+  // Context Usage
+  // ============================================================================
+  'Context Usage': '上下文使用情况',
+  'Context window': '上下文窗口',
+  Used: '已用',
+  Free: '空闲',
+  'Autocompact buffer': '自动压缩缓冲区',
+  'Usage by category': '分类用量',
+  'System prompt': '系统提示',
+  'Built-in tools': '内置工具',
+  'MCP tools': 'MCP 工具',
+  'Memory files': '记忆文件',
+  Skills: '技能',
+  Messages: '消息',
+  tokens: 'tokens',
+  'Estimated pre-conversation overhead': '预估对话前开销',
+  'No API response yet. Send a message to see actual usage.':
+    '暂无 API 响应。发送消息以查看实际使用情况。',
+  'Show context window usage breakdown.': '显示上下文窗口使用情况分解。',
 };

packages/cli/src/services/BuiltinCommandLoader.ts

@@ -14,6 +14,7 @@ import { authCommand } from '../ui/commands/authCommand.js';
 import { bugCommand } from '../ui/commands/bugCommand.js';
 import { clearCommand } from '../ui/commands/clearCommand.js';
 import { compressCommand } from '../ui/commands/compressCommand.js';
+import { contextCommand } from '../ui/commands/contextCommand.js';
 import { copyCommand } from '../ui/commands/copyCommand.js';
 import { docsCommand } from '../ui/commands/docsCommand.js';
 import { directoryCommand } from '../ui/commands/directoryCommand.js';
@@ -65,6 +66,7 @@ export class BuiltinCommandLoader implements ICommandLoader {
       bugCommand,
       clearCommand,
       compressCommand,
+      contextCommand,
       copyCommand,
       docsCommand,
       directoryCommand,