# Image Viewing Support - Implementation Complete ✅

## What Was Added

Your web IDE now has **full parity with Cursor** for image viewing by the AI assistant.

## Changes Made (Additive Only - Nothing Broken)

### 1. New Tool: `read_image` (server/tools.js)
- **Purpose**: Read image files from the filesystem and return them as base64
- **Supported formats**: PNG, JPG, JPEG, GIF, WEBP
- **Returns**: Image data with mime type, base64 encoding, path, size, and format

### 2. AI Handler Updates (server/ai-handler.js)
- **Helper function**: `formatToolResultContent()` - formats images for different providers
- **Claude support**: Images sent as base64 in tool_result content blocks (native support)
- **OpenAI/Grok support**: Images sent as follow-up user messages with `image_url` format
- **System prompt**: Added documentation about the read_image tool

### 3. Frontend Updates (public/js/ai-chat.js)
- **UI icon**: Added 🖼️ icon for read_image tool in chat feedback

## How It Works

### Example Usage

**User asks:**
> "Look at the screenshot in /path/to/screenshot.png and tell me what you see"

**AI will:**
1. Call `read_image` tool with the file path
2. Tool reads the image as base64
3. Image is sent to the LLM in the appropriate format:
   - **Claude**: Image embedded directly in tool_result
   - **OpenAI/GPT**: Image added as user message with data URI
   - **Grok**: Same as OpenAI

4. AI can now **see** and analyze the image

### What the AI Can Do

- Analyze screenshots and debug UI issues
- Review design mockups and provide feedback
- Read diagrams and explain architecture
- Identify issues in visual assets
- Compare before/after images
- Extract text from images (OCR-like)
- Describe visual content

## Provider-Specific Implementation

### Claude (Anthropic)
```javascript
// Tool result includes image directly
{
  role: 'user',
  content: [{
    type: 'tool_result',
    content: [
      { type: 'text', text: 'Image loaded...' },
      { type: 'image', source: { type: 'base64', media_type: 'image/png', data: '...' }}
    ]
  }]
}
```

### OpenAI / Grok
```javascript
// Tool result is JSON metadata
{ role: 'tool', content: '{"type":"image","mime_type":"image/png",...}' }

// Followed by user message with actual image
{
  role: 'user',
  content: [
    { type: 'text', text: '[Images loaded from read_image tool calls]' },
    { type: 'image_url', image_url: { url: 'data:image/png;base64,...' }}
  ]
}
```

## Testing

1. **Add a test image to your project** (e.g., save a screenshot)
2. **In the chat, ask**: "read the image at ./path/to/image.png"
3. **The AI will use the read_image tool** and be able to see and analyze it

## Example Prompts

- "What's in the screenshot at ./screenshots/ui-bug.png?"
- "Compare these two images: ./before.png and ./after.png"
- "List all images in ./assets/ and describe what each one contains"
- "Read ./diagram.png and explain the architecture"

## Technical Details

- **Image size limit**: Depends on the model's context window and base64 encoding overhead
- **Automatic format detection**: Based on file extension
- **Error handling**: Returns clear errors for unsupported formats
- **No file size limits in code**: But be mindful of API limits (typically 20MB for images)

## Future Enhancements (Optional)

- Image compression before sending
- Thumbnail generation for large images
- Support for SVG (would need different handling)
- Image diff visualization
- Multiple image comparison tool

---

**Status**: ✅ Ready to use  
**Testing needed**: Yes - try with a real image  
**Breaking changes**: None - purely additive
