# Doctor Command Enhancement Summary

## Overview
Enhanced the `mcp-browser doctor` command with comprehensive functional tests to diagnose mcp-browser installation health.

## Implementation

### Location
- **File**: `src/cli/commands/doctor.py`
- **Command**: `mcp-browser doctor`

### Comprehensive Checks (8 Total)

1. **✅ Configuration Directory & Files**
   - Checks `~/.mcp-browser/` exists
   - Validates `config.json` format
   - Auto-fix: Creates default config with `--fix`

2. **✅ Python Dependencies**
   - Verifies required packages: `websockets`, `click`, `rich`, `aiohttp`, `mcp`
   - Reports missing dependencies with install command

3. **✅ MCP Installer**
   - Checks if `py-mcp-installer` is available
   - Warning if missing (optional dependency)

4. **✅ Server Status**
   - Reports if server is running with PID and port
   - No auto-start (by design - just reports)

5. **✅ Port Availability**
   - Scans ports 8851-8899 for availability
   - Reports available/total count
   - Fails if no ports available

6. **✅ Extension Package**
   - Searches for `mcp-browser-extension.zip` in common locations:
     - `dist/mcp-browser-extension.zip`
     - `~/.mcp-browser/mcp-browser-extension.zip`
   - Reports file size in KB

7. **✅ MCP Configuration**
   - Checks `~/.config/claude/claude_desktop_config.json`
   - Verifies `mcp-browser` is configured in `mcpServers`

8. **✅ WebSocket Connectivity**
   - Tests WebSocket connection if server is running
   - Skips test if server is stopped (warning, not failure)
   - 2-second timeout for connection test

9. **✅ System Requirements** (verbose mode only)
   - Runs existing system checks
   - Verifies Python, Chrome, Node.js availability

## Features

### Command Options
```bash
mcp-browser doctor           # Basic diagnostic
mcp-browser doctor --verbose # Include system requirements
mcp-browser doctor --fix     # Auto-fix fixable issues
mcp-browser doctor -v --fix  # Verbose + auto-fix
```

### Output Format
- **Rich Table**: Color-coded status indicators
- **Status Types**:
  - `✓ PASS` (green) - Check passed
  - `⚠ WARN` (yellow) - Warning but system should work
  - `✗ FAIL` (red) - Critical failure
- **Summary Line**: `X passed, Y warnings, Z failed`
- **Fix Suggestions**: Shows fix commands for each failure

### Auto-Fix Capability
The `--fix` flag can automatically fix:
- Missing configuration directory
- Missing/invalid config.json
- Creates default configuration

## Design Principles

### Non-Intrusive
- **Does NOT auto-start server** (just reports status)
- **Does NOT require browser connection**
- **Does NOT modify system** unless `--fix` is used

### User-Friendly
- Clear, actionable error messages
- Suggests specific fix commands
- Color-coded output for quick scanning
- Verbose mode for deep debugging

### Comprehensive
- Tests all critical components
- Checks both required and optional dependencies
- Validates configuration files
- Tests actual connectivity (not just file existence)

## Example Output

### Healthy System
```
🩺 MCP Browser Doctor
Running comprehensive diagnostic checks...

┏━━━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
┃ Check                     ┃ Status       ┃ Details                           ┃
┡━━━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┩
│ Configuration             │ ✓ PASS       │ Valid config at ~/.mcp-browser/…  │
│ Python Dependencies       │ ✓ PASS       │ All 5 required packages installed │
│ MCP Installer             │ ✓ PASS       │ py-mcp-installer is available     │
│ Server Status             │ ✓ PASS       │ Running on port 8851 (PID: 12345) │
│ Port Availability         │ ✓ PASS       │ 49/49 ports available (8851-8899) │
│ Extension Package         │ ✓ PASS       │ Found at dist/… (74.5 KB)         │
│ MCP Configuration         │ ✓ PASS       │ mcp-browser configured in Claude  │
│ WebSocket Connectivity    │ ✓ PASS       │ Successfully connected to ws://…  │
└───────────────────────────┴──────────────┴───────────────────────────────────┘

Summary: 8 passed, 0 warnings, 0 failed
✓ All checks passed! System is healthy.
```

### System with Issues
```
🩺 MCP Browser Doctor
Running comprehensive diagnostic checks...

┏━━━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
┃ Check                     ┃ Status       ┃ Details                           ┃
┡━━━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┩
│ Configuration             │ ✗ FAIL       │ config.json not found             │
│ Python Dependencies       │ ✓ PASS       │ All 5 required packages installed │
│ Server Status             │ ⚠ WARN       │ Not running (will auto-start)     │
│ Port Availability         │ ✓ PASS       │ 49/49 ports available (8851-8899) │
│ Extension Package         │ ⚠ WARN       │ Extension ZIP not found           │
│ WebSocket Connectivity    │ ⚠ WARN       │ Server not running, skipping test │
└───────────────────────────┴──────────────┴───────────────────────────────────┘

Summary: 2 passed, 3 warnings, 1 failed
Run 'mcp-browser setup' to fix issues
Or run 'mcp-browser doctor --fix' to auto-fix
```

## Testing

### Manual Testing
All 8 checks verified:
- ✅ Configuration check works (pass/warning/fail scenarios)
- ✅ Dependencies check works (all installed)
- ✅ MCP installer check works
- ✅ Server status check works (running/stopped)
- ✅ Port availability check works
- ✅ Extension package check works (multiple locations)
- ✅ MCP configuration check works
- ✅ WebSocket connectivity works (with timeout)

### Test Script
Created `test_doctor_command.py` with 10 test scenarios:
- Basic execution
- All checks present
- Status indicators
- Dependencies check
- Configuration check
- Port availability check
- Extension package check
- No auto-start behavior (verified)
- Server stopped scenario
- Server running scenario

## Benefits

### For Users
- **Quick Health Check**: Run one command to verify entire system
- **Actionable Guidance**: Specific fix commands for each issue
- **No Surprises**: Verbose mode shows what will be checked
- **Safe**: Won't modify system without `--fix` flag

### For Developers
- **Debugging**: Quickly identify configuration issues
- **Support**: Easy to ask users to run `doctor` and share output
- **Testing**: Verify installation in different environments

### For CI/CD
- **Validation**: Verify deployment configuration
- **Monitoring**: Check system health in automated pipelines
- **Zero-downtime**: Check without restarting services

## Future Enhancements (Optional)

1. **JSON Output**: Add `--json` flag for machine-readable output
2. **Selective Checks**: Add `--check <name>` to run specific checks
3. **Performance Tests**: Add latency/throughput checks
4. **Browser Extension Check**: Verify extension is loaded in Chrome
5. **Log Analysis**: Check recent logs for errors
6. **Database Check**: Verify log storage database health

## Related Files

- `src/cli/commands/doctor.py` - Main implementation
- `src/cli/utils/daemon.py` - Server status utilities
- `test_doctor_command.py` - Test script (manual testing)

## Command Reference

```bash
# Basic diagnostic
mcp-browser doctor

# Verbose output (includes system requirements)
mcp-browser doctor --verbose
mcp-browser doctor -v

# Auto-fix issues
mcp-browser doctor --fix

# Verbose + auto-fix
mcp-browser doctor -v --fix
```

## Exit Codes

- `0` - All checks passed or warnings only
- `1` - One or more critical failures detected

## Conclusion

The enhanced doctor command provides comprehensive diagnostics for mcp-browser installations, making it easier to identify and fix issues quickly. It follows best practices:

- Non-intrusive (no auto-start, no modifications without consent)
- User-friendly (clear output, actionable fixes)
- Comprehensive (8+ checks covering all critical components)
- Extensible (easy to add new checks)
- Safe (validates before attempting fixes)
