feat(ui): add customizable status line with /statusline command

docs/users/features/_meta.ts

@@ -16,5 +16,6 @@ export default {
   language: 'i18n',
   channels: 'Channels',
   hooks: 'Hooks',
+  'status-line': 'Status Line',
   'scheduled-tasks': 'Scheduled Tasks',
 };

docs/users/features/status-line.md

@@ -0,0 +1,173 @@
+# Status Line
+
+> Display custom information beneath the footer using a shell command.
+
+The status line lets you run a shell command whose output is displayed as a persistent line below the footer bar. The command receives structured JSON context via stdin, so it can show session-aware information like the current model, token usage, git branch, or anything else you can script.
+
+```
+┌─────────────────────────────────────────────────────────────────┐
+│  ? for shortcuts                  🔒 docker | Debug | ◼◼◼◻ 67% │
+├─────────────────────────────────────────────────────────────────┤
+│  user@host ~/project (main) qwen-3-235b  ctx:34%               │  ← status line
+└─────────────────────────────────────────────────────────────────┘
+```
+
+## Prerequisites
+
+- [`jq`](https://jqlang.github.io/jq/) is recommended for parsing the JSON input (install via `brew install jq`, `apt install jq`, etc.)
+- Simple commands that don't need JSON data (e.g. `git branch --show-current`) work without `jq`
+
+## Quick setup
+
+The easiest way to configure a status line is the `/statusline` command. It launches a setup agent that reads your shell PS1 configuration and generates a matching status line:
+
+```
+/statusline
+```
+
+You can also give it specific instructions:
+
+```
+/statusline show model name and context usage percentage
+```
+
+## Manual configuration
+
+Add a `statusLine` object under the `ui` key in `~/.qwen/settings.json`:
+
+```json
+{
+  "ui": {
+    "statusLine": {
+      "type": "command",
+      "command": "input=$(cat); model=$(echo \"$input\" | jq -r '.model.id'); tokens=$(echo \"$input\" | jq -r '.context_window.last_prompt_token_count'); echo \"$model  ctx:$tokens\"",
+      "padding": 0
+    }
+  }
+}
+```
+
+| Field     | Type        | Required | Description                                                                           |
+| --------- | ----------- | -------- | ------------------------------------------------------------------------------------- |
+| `type`    | `"command"` | Yes      | Must be `"command"`                                                                   |
+| `command` | string      | Yes      | Shell command to execute. Receives JSON via stdin, first line of stdout is displayed. |
+| `padding` | number      | No       | Horizontal padding (default: `0`)                                                     |
+
+## JSON input
+
+The command receives a JSON object via stdin with the following fields:
+
+```json
+{
+  "session_id": "abc-123",
+  "cwd": "/home/user/project",
+  "model": {
+    "id": "qwen-3-235b"
+  },
+  "context_window": {
+    "context_window_size": 131072,
+    "last_prompt_token_count": 45000
+  },
+  "vim": {
+    "mode": "INSERT"
+  }
+}
+```
+
+| Field                                    | Type             | Description                                                                        |
+| ---------------------------------------- | ---------------- | ---------------------------------------------------------------------------------- |
+| `session_id`                             | string           | Unique session identifier                                                          |
+| `cwd`                                    | string           | Current working directory                                                          |
+| `model.id`                               | string           | Current model identifier                                                           |
+| `context_window.context_window_size`     | number           | Total context window size                                                          |
+| `context_window.last_prompt_token_count` | number           | Tokens used in the last prompt                                                     |
+| `vim`                                    | object \| absent | Present only when vim mode is enabled. Contains `mode` (`"INSERT"` or `"NORMAL"`). |
+
+> **Important:** stdin can only be read once. Always store it in a variable first: `input=$(cat)`.
+
+## Examples
+
+### Model and token usage
+
+```json
+{
+  "ui": {
+    "statusLine": {
+      "type": "command",
+      "command": "input=$(cat); model=$(echo \"$input\" | jq -r '.model.id'); tokens=$(echo \"$input\" | jq -r '.context_window.last_prompt_token_count'); size=$(echo \"$input\" | jq -r '.context_window.context_window_size'); pct=$((tokens * 100 / (size > 0 ? size : 1))); echo \"$model  ctx:${pct}%\""
+    }
+  }
+}
+```
+
+Output: `qwen-3-235b  ctx:34%`
+
+### Git branch + directory
+
+```json
+{
+  "ui": {
+    "statusLine": {
+      "type": "command",
+      "command": "branch=$(git branch --show-current 2>/dev/null); dir=$(basename \"$PWD\"); echo \"$dir${branch:+ ($branch)}\""
+    }
+  }
+}
+```
+
+Output: `my-project (main)`
+
+> Note: `git` and `pwd` run in the workspace directory automatically.
+
+### Script file for complex commands
+
+For longer commands, save a script file at `~/.qwen/statusline-command.sh`:
+
+```bash
+#!/bin/bash
+input=$(cat)
+model=$(echo "$input" | jq -r '.model.id')
+tokens=$(echo "$input" | jq -r '.context_window.last_prompt_token_count')
+size=$(echo "$input" | jq -r '.context_window.context_window_size')
+branch=$(git branch --show-current 2>/dev/null)
+
+parts=()
+[ -n "$model" ] && parts+=("$model")
+[ -n "$branch" ] && parts+=("($branch)")
+if [ "$tokens" -gt 0 ] && [ "$size" -gt 0 ] 2>/dev/null; then
+  pct=$((tokens * 100 / size))
+  parts+=("ctx:${pct}%")
+fi
+
+echo "${parts[*]}"
+```
+
+Then reference it in settings:
+
+```json
+{
+  "ui": {
+    "statusLine": {
+      "type": "command",
+      "command": "bash ~/.qwen/statusline-command.sh"
+    }
+  }
+}
+```
+
+## Behavior
+
+- **Update triggers**: The status line updates when the model changes, a new message is sent (token count changes), or vim mode is toggled. Updates are debounced (300ms).
+- **Timeout**: Commands that take longer than 5 seconds are killed. The status line clears on failure.
+- **Output**: Only the first line of stdout is used. The text is rendered with dimmed colors and truncated to terminal width.
+- **Hot reload**: Changes to `ui.statusLine` in settings take effect immediately — no restart required.
+- **Removal**: Delete the `ui.statusLine` key from settings to disable. The status line disappears and the "? for shortcuts" hint returns.
+
+## Troubleshooting
+
+| Problem                 | Cause                  | Fix                                                                                                                                                 |
+| ----------------------- | ---------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------- |
+| Status line not showing | Config at wrong path   | Must be under `ui.statusLine`, not root-level `statusLine`                                                                                          |
+| Empty output            | Command fails silently | Test manually: `echo '{"model":{"id":"test"},"cwd":"/tmp","context_window":{"context_window_size":1,"last_prompt_token_count":0}}' \| your_command` |
+| Stale data              | No trigger fired       | Send a message or switch models to trigger an update                                                                                                |
+| Command too slow        | Complex script         | Optimize the script or move heavy work to a background cache                                                                                        |

packages/cli/src/commands/channel/pidfile.test.ts

@@ -86,7 +86,7 @@ describe('writeServiceInfo + readServiceInfo', () => {
     writeServiceInfo(['telegram']);
 
     // Now simulate dead process
-     
+
     process.kill = vi.fn(() => {
       throw new Error('ESRCH');
       // eslint-disable-next-line @typescript-eslint/no-explicit-any
@@ -122,7 +122,6 @@ describe('signalService', () => {
   });
 
   it('returns false when process is not found', () => {
-
     process.kill = vi.fn(() => {
       throw new Error('ESRCH');
       // eslint-disable-next-line @typescript-eslint/no-explicit-any
@@ -140,7 +139,6 @@ describe('signalService', () => {
 
 describe('waitForExit', () => {
   it('returns true immediately if process is already dead', async () => {
-
     process.kill = vi.fn(() => {
       throw new Error('ESRCH');
       // eslint-disable-next-line @typescript-eslint/no-explicit-any
@@ -152,7 +150,7 @@ describe('waitForExit', () => {
 
   it('returns true when process dies within timeout', async () => {
     let alive = true;
-     
+
     process.kill = vi.fn(() => {
       if (!alive) throw new Error('ESRCH');
       return true;

packages/cli/src/config/settingsSchema.ts

@@ -429,6 +429,17 @@ const SETTINGS_SCHEMA = {
         description: 'The color theme for the UI.',
         showInDialog: true,
       },
+      statusLine: {
+        type: 'object',
+        label: 'Status Line',
+        category: 'UI',
+        requiresRestart: false,
+        default: undefined as
+          | { type: 'command'; command: string; padding?: number }
+          | undefined,
+        description: 'Custom status line display configuration.',
+        showInDialog: false,
+      },
       customThemes: {
         type: 'object',
         label: 'Custom Themes',

packages/cli/src/services/BuiltinCommandLoader.ts

@@ -47,6 +47,7 @@ import { toolsCommand } from '../ui/commands/toolsCommand.js';
 import { vimCommand } from '../ui/commands/vimCommand.js';
 import { setupGithubCommand } from '../ui/commands/setupGithubCommand.js';
 import { insightCommand } from '../ui/commands/insightCommand.js';
+import { statuslineCommand } from '../ui/commands/statuslineCommand.js';
 
 const builtinDebugLogger = createDebugLogger('BUILTIN_COMMAND_LOADER');
 
@@ -118,6 +119,7 @@ export class BuiltinCommandLoader implements ICommandLoader {
       setupGithubCommand,
       terminalSetupCommand,
       insightCommand,
+      statuslineCommand,
     ];
 
     return allDefinitions.filter((cmd): cmd is SlashCommand => cmd !== null);

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

@@ -0,0 +1,29 @@
+/**
+ * @license
+ * Copyright 2025 Qwen
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import type { SlashCommand, SubmitPromptActionReturn } from './types.js';
+import { CommandKind } from './types.js';
+import { t } from '../../i18n/index.js';
+
+export const statuslineCommand: SlashCommand = {
+  name: 'statusline',
+  get description() {
+    return t("Set up Qwen Code's status line UI");
+  },
+  kind: CommandKind.BUILT_IN,
+  action: (_context, args): SubmitPromptActionReturn => {
+    const prompt =
+      args.trim() || 'Configure my statusLine from my shell PS1 configuration';
+    return {
+      type: 'submit_prompt',
+      content: [
+        {
+          text: `Create an Agent with subagent_type "statusline-setup" and the following prompt:\n\n${prompt}`,
+        },
+      ],
+    };
+  },
+};

packages/cli/src/ui/components/Footer.test.tsx

@@ -11,6 +11,7 @@ import * as useTerminalSize from '../hooks/useTerminalSize.js';
 import { type UIState, UIStateContext } from '../contexts/UIStateContext.js';
 import { ConfigContext } from '../contexts/ConfigContext.js';
 import { VimModeProvider } from '../contexts/VimModeContext.js';
+import { SettingsContext } from '../contexts/SettingsContext.js';
 import type { LoadedSettings } from '../../config/settings.js';
 
 vi.mock('../hooks/useTerminalSize.js');
@@ -52,14 +53,17 @@ const createMockSettings = (): LoadedSettings =>
 
 const renderWithWidth = (width: number, uiState: UIState) => {
   useTerminalSizeMock.mockReturnValue({ columns: width, rows: 24 });
+  const mockSettings = createMockSettings();
   return render(
-    <ConfigContext.Provider value={createMockConfig() as never}>
-      <VimModeProvider settings={createMockSettings()}>
-        <UIStateContext.Provider value={uiState}>
-          <Footer />
-        </UIStateContext.Provider>
-      </VimModeProvider>
-    </ConfigContext.Provider>,
+    <SettingsContext.Provider value={mockSettings}>
+      <ConfigContext.Provider value={createMockConfig() as never}>
+        <VimModeProvider settings={mockSettings}>
+          <UIStateContext.Provider value={uiState}>
+            <Footer />
+          </UIStateContext.Provider>
+        </VimModeProvider>
+      </ConfigContext.Provider>
+    </SettingsContext.Provider>,
   );
 };