feat(cli): add /compress-fast command for no-LLM rule-based context compression

docs/users/features/commands.md

@@ -18,14 +18,15 @@ Slash commands are used to manage Qwen Code sessions, interface, and basic behav
 
 These commands help you save, restore, and summarize work progress.
 
-| Command     | Description                                               | Usage Examples                       |
-| ----------- | --------------------------------------------------------- | ------------------------------------ |
-| `/init`     | Analyze current directory and create initial context file | `/init`                              |
-| `/summary`  | Generate project summary based on conversation history    | `/summary`                           |
-| `/compress` | Replace chat history with summary to save Tokens          | `/compress`                          |
-| `/resume`   | Resume a previous conversation session                    | `/resume`                            |
-| `/recap`    | Generate a one-line session recap now                     | `/recap`                             |
-| `/restore`  | Restore files to state before tool execution              | `/restore` (list) or `/restore <ID>` |
+| Command          | Description                                                              | Usage Examples                       |
+| ---------------- | ------------------------------------------------------------------------ | ------------------------------------ |
+| `/init`          | Analyze current directory and create initial context file                | `/init`                              |
+| `/summary`       | Generate project summary based on conversation history                   | `/summary`                           |
+| `/compress`      | Replace chat history with summary to save Tokens                         | `/compress`                          |
+| `/compress-fast` | Fast compression without AI — strips old tool outputs and thinking parts | `/compress-fast`                     |
+| `/resume`        | Resume a previous conversation session                                   | `/resume`                            |
+| `/recap`         | Generate a one-line session recap now                                    | `/recap`                             |
+| `/restore`       | Restore files to state before tool execution                             | `/restore` (list) or `/restore <ID>` |
 
 ### 1.2 Interface and Workspace Control
 

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

@@ -224,6 +224,8 @@ export default {
     'Clear conversation history and free up context',
   'Compresses the context by replacing it with a summary.':
     'Compresses the context by replacing it with a summary.',
+  'Fast context compression without AI. Strips old tool outputs and thinking parts.':
+    'Fast context compression without AI. Strips old tool outputs and thinking parts.',
   'open full Qwen Code documentation in your browser':
     'open full Qwen Code documentation in your browser',
   'Configuration not available.': 'Configuration not available.',
@@ -2025,6 +2027,7 @@ export default {
   'Loading suggestions...': 'Loading suggestions...',
   'Show per-item context usage breakdown.':
     'Show per-item context usage breakdown.',
+  'No compression needed.': 'No compression needed.',
 
   // ============================================================================
   // Stats

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

@@ -202,6 +202,8 @@ export default {
   'Clear conversation history and free up context': '清除對話歷史並釋放上下文',
   'Compresses the context by replacing it with a summary.':
     '通過摘要替換來壓縮上下文',
+  'Fast context compression without AI. Strips old tool outputs and thinking parts.':
+    '無需 AI 的快速上下文壓縮。清理舊工具輸出並剝離思考過程。',
   'open full Qwen Code documentation in your browser':
     '在瀏覽器中打開完整的 Qwen Code 文檔',
   'Configuration not available.': '配置不可用',
@@ -1726,4 +1728,5 @@ export default {
   // === Same-as-English optimization ===
   ' (not in model registry)': '（不在模型註冊表中）',
   'start server': '啟動伺服器',
+  'No compression needed.': '無需壓縮。',
 };

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

@@ -217,6 +217,8 @@ export default {
   'Clear conversation history and free up context': '清除对话历史并释放上下文',
   'Compresses the context by replacing it with a summary.':
     '通过摘要替换来压缩上下文',
+  'Fast context compression without AI. Strips old tool outputs and thinking parts.':
+    '无需 AI 的快速上下文压缩。清理旧工具输出并剥离思考过程。',
   'open full Qwen Code documentation in your browser':
     '在浏览器中打开完整的 Qwen Code 文档',
   'Configuration not available.': '配置不可用',
@@ -1926,4 +1928,5 @@ export default {
   '中国 (China)': '中国',
   '中国 (China) - 阿里云百炼': '中国 - 阿里云百炼',
   '阿里云百炼 (aliyun.com)': '阿里云百炼（aliyun.com）',
+  'No compression needed.': '无需压缩。',
 };

packages/cli/src/services/BuiltinCommandLoader.ts

@@ -19,6 +19,7 @@ import { bugCommand } from '../ui/commands/bugCommand.js';
 import { clearCommand } from '../ui/commands/clearCommand.js';
 import { deleteCommand } from '../ui/commands/deleteCommand.js';
 import { compressCommand } from '../ui/commands/compressCommand.js';
+import { compressFastCommand } from '../ui/commands/compressFastCommand.js';
 import { contextCommand } from '../ui/commands/contextCommand.js';
 import { copyCommand } from '../ui/commands/copyCommand.js';
 import { docsCommand } from '../ui/commands/docsCommand.js';
@@ -107,6 +108,7 @@ export class BuiltinCommandLoader implements ICommandLoader {
       bugCommand,
       clearCommand,
       compressCommand,
+      compressFastCommand,
       contextCommand,
       copyCommand,
       diffCommand,

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

@@ -0,0 +1,178 @@
+/**
+ * @license
+ * Copyright 2026 Qwen Team
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import {
+  CompressionStatus,
+  type ChatCompressionInfo,
+  type GeminiClient,
+} from '@qwen-code/qwen-code-core';
+import { vi, describe, it, expect, beforeEach } from 'vitest';
+import { compressFastCommand } from './compressFastCommand.js';
+import { createMockCommandContext } from '../../test-utils/mockCommandContext.js';
+import { MessageType } from '../types.js';
+
+describe('compressFastCommand', () => {
+  let context: ReturnType<typeof createMockCommandContext>;
+  let mockTryCompressChatFast: ReturnType<typeof vi.fn>;
+
+  beforeEach(() => {
+    mockTryCompressChatFast = vi.fn();
+    context = createMockCommandContext({
+      services: {
+        config: {
+          getGeminiClient: () =>
+            ({
+              tryCompressChatFast: mockTryCompressChatFast,
+            }) as unknown as GeminiClient,
+        },
+      },
+    });
+  });
+
+  it('should do nothing if a compression is already pending', async () => {
+    context.ui.pendingItem = {
+      type: MessageType.COMPRESSION,
+      compression: {
+        isPending: true,
+        originalTokenCount: null,
+        newTokenCount: null,
+        compressionStatus: null,
+      },
+    };
+    await compressFastCommand.action!(context, '');
+    expect(context.ui.addItem).toHaveBeenCalledWith(
+      expect.objectContaining({
+        type: MessageType.ERROR,
+        text: 'Already compressing, wait for previous request to complete',
+      }),
+      expect.any(Number),
+    );
+    expect(mockTryCompressChatFast).not.toHaveBeenCalled();
+  });
+
+  it('should call tryCompressChatFast without arguments', async () => {
+    mockTryCompressChatFast.mockResolvedValue({
+      originalTokenCount: 200,
+      newTokenCount: 100,
+      compressionStatus: CompressionStatus.COMPRESSED,
+    } satisfies ChatCompressionInfo);
+
+    await compressFastCommand.action!(context, '');
+
+    expect(mockTryCompressChatFast).toHaveBeenCalledWith();
+  });
+
+  it('should display compression result on success (interactive)', async () => {
+    mockTryCompressChatFast.mockResolvedValue({
+      originalTokenCount: 200,
+      newTokenCount: 100,
+      compressionStatus: CompressionStatus.COMPRESSED,
+    } satisfies ChatCompressionInfo);
+
+    await compressFastCommand.action!(context, '');
+
+    expect(context.ui.addItem).toHaveBeenCalledWith(
+      {
+        type: MessageType.COMPRESSION,
+        compression: {
+          isPending: false,
+          originalTokenCount: 200,
+          newTokenCount: 100,
+          compressionStatus: CompressionStatus.COMPRESSED,
+        },
+      },
+      expect.any(Number),
+    );
+    expect(context.ui.setPendingItem).toHaveBeenLastCalledWith(null);
+  });
+
+  it('should show "No compression needed" when tokens unchanged', async () => {
+    mockTryCompressChatFast.mockResolvedValue({
+      originalTokenCount: 100,
+      newTokenCount: 100,
+      compressionStatus: CompressionStatus.NOOP,
+    } satisfies ChatCompressionInfo);
+
+    await compressFastCommand.action!(context, '');
+
+    expect(context.ui.addItem).toHaveBeenCalledWith(
+      expect.objectContaining({
+        type: MessageType.INFO,
+        text: 'No compression needed.',
+      }),
+      expect.any(Number),
+    );
+  });
+
+  it('should handle errors gracefully', async () => {
+    const error = new Error('Compression failed');
+    mockTryCompressChatFast.mockRejectedValue(error);
+
+    await compressFastCommand.action!(context, '');
+
+    expect(context.ui.addItem).toHaveBeenCalledWith(
+      expect.objectContaining({
+        type: MessageType.ERROR,
+        text: `Failed to compress chat history: ${error.message}`,
+      }),
+      expect.any(Number),
+    );
+    expect(context.ui.setPendingItem).toHaveBeenCalledWith(null);
+  });
+
+  it('should return error message in non-interactive mode', async () => {
+    const error = new Error('Compression failed');
+    mockTryCompressChatFast.mockRejectedValue(error);
+
+    const ctx = createMockCommandContext({
+      executionMode: 'non_interactive',
+      services: {
+        config: {
+          getGeminiClient: () =>
+            ({
+              tryCompressChatFast: mockTryCompressChatFast,
+            }) as unknown as GeminiClient,
+        },
+      },
+    });
+
+    const result = await compressFastCommand.action!(ctx, '');
+
+    expect(result).toEqual({
+      type: 'message',
+      messageType: 'error',
+      content: `Failed to compress chat history: ${error.message}`,
+    });
+  });
+
+  it('should return info message in non-interactive mode on success', async () => {
+    mockTryCompressChatFast.mockResolvedValue({
+      originalTokenCount: 200,
+      newTokenCount: 100,
+      compressionStatus: CompressionStatus.COMPRESSED,
+    } satisfies ChatCompressionInfo);
+
+    const ctx = createMockCommandContext({
+      executionMode: 'non_interactive',
+      services: {
+        config: {
+          getGeminiClient: () =>
+            ({
+              tryCompressChatFast: mockTryCompressChatFast,
+            }) as unknown as GeminiClient,
+        },
+      },
+    });
+
+    const result = await compressFastCommand.action!(ctx, '');
+
+    expect(result).toEqual({
+      type: 'message',
+      messageType: 'info',
+      content: 'Context compressed (200 -> 100).',
+    });
+  });
+});