agent-browser

# Browser Automation with agent-browser

웹 브라우저를 자동화하여 테스트, 폼 작성, 스크린샷, 데이터 추출 등을 수행합니다.

## Instructions

### 워크플로우: 탐색 → 분석 → 상호작용 → 검증

#### Quick start

```bash
agent-browser open <url>        # Navigate to page
agent-browser snapshot -i       # Get interactive elements with refs
agent-browser click @e1         # Click element by ref
agent-browser fill @e2 "text"   # Fill input by ref
agent-browser close             # Close browser
```

#### Core workflow

1. Navigate: `agent-browser open <url>`
2. Snapshot: `agent-browser snapshot -i` (returns elements with refs like `@e1`, `@e2`)
3. Interact using refs from the snapshot
4. Re-snapshot after navigation or significant DOM changes

## Commands

### Navigation
```bash
agent-browser open <url>      # Navigate to URL
agent-browser back            # Go back
agent-browser forward         # Go forward
agent-browser reload          # Reload page
agent-browser close           # Close browser
```

### Snapshot (page analysis)
```bash
agent-browser snapshot        # Full accessibility tree
agent-browser snapshot -i     # Interactive elements only (recommended)
agent-browser snapshot -c     # Compact output
agent-browser snapshot -d 3   # Limit depth to 3
```

### Interactions (use @refs from snapshot)
```bash
agent-browser click @e1           # Click
agent-browser dblclick @e1        # Double-click
agent-browser fill @e2 "text"     # Clear and type
agent-browser type @e2 "text"     # Type without clearing
agent-browser press Enter         # Press key
agent-browser press Control+a     # Key combination
agent-browser hover @e1           # Hover
agent-browser check @e1           # Check checkbox
agent-browser uncheck @e1         # Uncheck checkbox
agent-browser select @e1 "value"  # Select dropdown
agent-browser scroll down 500     # Scroll page
agent-browser scrollintoview @e1  # Scroll element into view
```

### Get information
```bash
agent-browser get text @e1        # Get element text
agent-browser get value @e1       # Get input value
agent-browser get title           # Get page title
agent-browser get url             # Get current URL
```

### Screenshots
```bash
agent-browser screenshot          # Screenshot to stdout
agent-browser screenshot path.png # Save to file
agent-browser screenshot --full   # Full page
```

### Wait
```bash
agent-browser wait @e1                     # Wait for element
agent-browser wait 2000                    # Wait milliseconds
agent-browser wait --text "Success"        # Wait for text
agent-browser wait --load networkidle      # Wait for network idle
```

### Semantic locators (alternative to refs)
```bash
agent-browser find role button click --name "Submit"
agent-browser find text "Sign In" click
agent-browser find label "Email" fill "user@test.com"
```

## Examples

### Example 1: Form submission

```bash
agent-browser open https://example.com/form
agent-browser snapshot -i
# Output shows: textbox "Email" [ref=e1], textbox "Password" [ref=e2], button "Submit" [ref=e3]

agent-browser fill @e1 "user@example.com"
agent-browser fill @e2 "password123"
agent-browser click @e3
agent-browser wait --load networkidle
agent-browser snapshot -i  # Check result
```

### Example 2: Authentication with saved state

```bash
# Login once
agent-browser open https://app.example.com/login
agent-browser snapshot -i
agent-browser fill @e1 "username"
agent-browser fill @e2 "password"
agent-browser click @e3
agent-browser wait --url "**/dashboard"
agent-browser state save auth.json

# Later sessions: load saved state
agent-browser state load auth.json
agent-browser open https://app.example.com/dashboard
```

### Example 3: Data extraction

```bash
agent-browser open https://example.com/products
agent-browser snapshot -i
# Find product titles and prices
agent-browser get text @e5  # Product title
agent-browser get text @e6  # Price
agent-browser screenshot products.png
```

## Advanced Features

### Sessions (parallel browsers)

**동시 사용 시 `--session` 필수.** `--session` 없이 실행하면 모든 세션이 `default` daemon을 공유하여 서로 간섭한다.

세션 이름 규칙:
- worktree에서 실행 → worktree 브랜치명 사용
- 메인에서 실행 → 작업 목적으로 명명 (예: `qa-login`, `data-extract`)

```bash
agent-browser --session my-feature open site-a.com   # 세션 A
agent-browser --session my-feature snapshot -i        # 같은 세션에서 조작

agent-browser --session other-task open site-b.com    # 세션 B (독립)
agent-browser session list                            # 활성 세션 목록
```

### JSON output (for parsing)

Add `--json` for machine-readable output:
```bash
agent-browser snapshot -i --json
agent-browser get text @e1 --json
```

### Debugging

```bash
agent-browser open example.com --headed  # Show browser window
agent-browser console                    # View console messages
agent-browser errors                     # View page errors
```

## Best Practices

1. **동시 사용 시 `--session` 지정**: `--session` 없으면 `default` 세션을 공유하여 간섭 발생. 항상 고유한 세션명 사용
2. **Always snapshot before interacting**: Get fresh refs after navigation or DOM changes
3. **Use interactive snapshot (`-i`)**: Reduces noise, focuses on actionable elements
4. **Wait appropriately**: Use `wait --load networkidle` after actions that trigger navigation
5. **Save auth state**: Reuse login sessions with `state save/load`
6. **Take screenshots for verification**: Visual confirmation of expected state
7. **Use semantic locators for stable tests**: `find role/text/label` is more resilient than refs
8. **작업 완료 후 `close`**: 유휴 daemon은 15분 후 자동 종료되지만, 리소스 절약을 위해 명시적 close 권장

## Technical Details

- Based on Playwright browser automation
- Supports Chromium, Firefox, and WebKit
- Uses accessibility tree for element detection
- Provides stable references (@e1, @e2) for elements
- Handles common web testing scenarios out-of-the-box