# JSON Viewer Test Summary

## Overview
The JSON viewer has been successfully tested in the Claude MPM Socket.IO Dashboard. It provides a comprehensive view of event data with syntax highlighting and scrollable display.

## Features Tested

### 1. JSON Display
- ✅ Full event JSON is displayed below event summary cards
- ✅ Located in the Event Analysis panel under "📋 Full Event JSON" header
- ✅ Shows complete event structure with proper indentation (2 spaces)
- ✅ Scrollable view with max height of 400px for large objects

### 2. Syntax Highlighting
The JSON viewer includes color-coded syntax highlighting for better readability:
- **Keys**: Blue (#0969da) - e.g., `"event_type":`
- **String values**: Dark blue (#0a3069) - e.g., `"task.todo_write"`
- **Numbers**: Blue (#0550ae) - e.g., `123`
- **Booleans**: Red (#cf222e) - e.g., `true`, `false`
- **Null values**: Gray (#6e7781) - e.g., `null`

### 3. Navigation Integration
- ✅ JSON view updates automatically when selecting different events
- ✅ Arrow key navigation (↑/↓) works seamlessly
- ✅ Selected event is highlighted in the event list

### 4. Data Preservation
- ✅ All event data is preserved and displayed
- ✅ Nested objects and arrays are properly formatted
- ✅ Special characters are properly escaped for HTML display

## How to Test

1. **Open Dashboard**:
   ```
   file:///Users/masa/Projects/claude-mpm/scripts/claude_mpm_socketio_dashboard.html?autoconnect=true&port=8765
   ```

2. **Generate Events**:
   ```bash
   ./claude-mpm run -i "echo 'Test event'" --non-interactive --monitor
   ```

3. **View JSON**:
   - Click on any event in the Events tab
   - Scroll down in the Event Analysis panel
   - See the full JSON display with syntax highlighting

## Implementation Details

### Code Location
- File: `scripts/claude_mpm_socketio_dashboard.html`
- JSON viewer section starts around line 1000
- `formatJSON()` function handles syntax highlighting

### Key Components
```javascript
// JSON formatting with syntax highlighting
function formatJSON(obj) {
    let json = JSON.stringify(obj, null, 2);
    json = json.replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;');
    json = json.replace(/"([^"]+)":/g, '<span style="color: #0969da;">"$1"</span>:');
    json = json.replace(/: "([^"]*)"/g, ': <span style="color: #0a3069;">"$1"</span>');
    json = json.replace(/: (\d+)/g, ': <span style="color: #0550ae;">$1</span>');
    json = json.replace(/: (true|false)/g, ': <span style="color: #cf222e;">$1</span>');
    json = json.replace(/: null/g, ': <span style="color: #6e7781;">null</span>');
    return json;
}
```

### CSS Styling
```css
.json-display {
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 6px;
    padding: 12px;
    overflow-x: auto;
    font-family: 'Monaco', 'Consolas', 'Courier New', monospace;
    font-size: 12px;
    line-height: 1.5;
    color: #1e293b;
    max-height: 400px;
    overflow-y: auto;
}
```

## Test Results
- ✅ JSON viewer successfully displays event data
- ✅ Syntax highlighting works correctly for all data types
- ✅ Navigation and selection features work as expected
- ✅ Large JSON objects are properly scrollable
- ✅ HTML escaping prevents injection issues

## Conclusion
The JSON viewer is fully functional and provides an excellent way to inspect complete event data in the Claude MPM Socket.IO Dashboard. The syntax highlighting and scrollable view make it easy to analyze complex event structures.