Terminal Capture

Quick Start

1. Write Scenario Configuration

Create a .ts file under integration-tests/terminal-capture/scenarios/:

import type { ScenarioConfig } from '../scenario-runner.js';

export default {
  name: '/about',
  spawn: ['node', 'dist/cli.js', '--yolo'],
  terminal: { title: 'qwen-code', cwd: '../../..' }, // Relative to this config file's location
  flow: [
    { type: 'Hi, can you help me understand this codebase?' },
    { type: '/about' },
  ],
} satisfies ScenarioConfig;

2. Run

# Single scenario
npx tsx integration-tests/terminal-capture/run.ts integration-tests/terminal-capture/scenarios/about.ts

# Batch (entire directory)
npx tsx integration-tests/terminal-capture/run.ts integration-tests/terminal-capture/scenarios/

3. Output

Screenshots are saved to integration-tests/terminal-capture/scenarios/screenshots/{name}/:

FlowStep API

Each flow step can contain the following fields:

type: string — Input Text

Automatic behavior: Input text → Screenshot (01) → Press Enter → Wait for output to stabilize → Screenshot (02).

{
  type: 'Hello';
} // Plain text
{
  type: '/about';
} // Slash command (auto-completion handled automatically)

Special rule: If the next step is key, do not auto-press Enter (hand over control to the key sequence).

key: string | string[] — Send Key Press

Used for menu selection, Tab completion, and other interactions. Does not auto-press Enter or auto-screenshot.

Supported key names: ArrowUp, ArrowDown, ArrowLeft, ArrowRight, Enter, Tab, Escape, Backspace, Space, Home, End, PageUp, PageDown, Delete

{
  key: 'ArrowDown';
} // Single key
{
  key: ['ArrowDown', 'ArrowDown', 'Enter'];
} // Multiple keys

Auto-screenshot is triggered after the key sequence ends (when the next step is not a key).

streaming — Capture During Execution

Capture multiple screenshots at intervals during long-running output (e.g., progress bars). Optionally generates an animated GIF.

{
  type: 'Run this command: bash progress.sh',
  streaming: {
    delayMs: 7000,    // Wait before first capture (skip initial waiting phase)
    intervalMs: 500,  // Interval between captures
    count: 20,        // Maximum number of captures
    gif: true,        // Generate animated GIF (default: true, requires ffmpeg)
  },
}

• delayMs (optional): Milliseconds to wait after pressing Enter before starting captures. Useful for skipping model thinking/approval time.
• Captures stop early if terminal output is unchanged for 3 consecutive intervals.
• Duplicate frames (no output change) are automatically skipped.

GIF prerequisite: If the scenario uses streaming with GIF enabled (default), check if ffmpeg is installed before running. If not, ask the user whether they'd like to install it:

# Check
which ffmpeg

# Install (macOS)
brew install ffmpeg

If the user declines, the scenario still runs — GIF generation is skipped with a warning.

capture / captureFull — Explicit Screenshot

Use as a standalone step, or override automatic naming:

{
  capture: 'initial.png';
} // Screenshot current viewport only
{
  captureFull: 'all-output.png';
} // Screenshot full scrollback buffer

Scenario Examples

Basic: Input + Command