kicad-mcp-server/python/kicad_interface.py

#!/usr/bin/env python3
"""
KiCAD Python Interface Script for Model Context Protocol

This script handles communication between the MCP TypeScript server
and KiCAD's Python API (pcbnew). It receives commands via stdin as
JSON and returns responses via stdout also as JSON.
"""

import sys
import json
import traceback
import logging
import os
from typing import Dict, Any, Optional

# Import tool schemas and resource definitions
from schemas.tool_schemas import TOOL_SCHEMAS
from resources.resource_definitions import RESOURCE_DEFINITIONS, handle_resource_read

# Configure logging
log_dir = os.path.join(os.path.expanduser('~'), '.kicad-mcp', 'logs')
os.makedirs(log_dir, exist_ok=True)
log_file = os.path.join(log_dir, 'kicad_interface.log')

logging.basicConfig(
    level=logging.DEBUG,
    format='%(asctime)s [%(levelname)s] %(message)s',
    handlers=[
        logging.FileHandler(log_file),
        logging.StreamHandler(sys.stderr)
    ]
)
logger = logging.getLogger('kicad_interface')

# Log Python environment details
logger.info(f"Python version: {sys.version}")
logger.info(f"Python executable: {sys.executable}")
logger.info(f"Platform: {sys.platform}")
logger.info(f"Working directory: {os.getcwd()}")

# Windows-specific diagnostics
if sys.platform == 'win32':
    logger.info("=== Windows Environment Diagnostics ===")
    logger.info(f"PYTHONPATH: {os.environ.get('PYTHONPATH', 'NOT SET')}")
    logger.info(f"PATH: {os.environ.get('PATH', 'NOT SET')[:200]}...")  # Truncate PATH

    # Check for common KiCAD installations
    common_kicad_paths = [
        r"C:\Program Files\KiCad",
        r"C:\Program Files (x86)\KiCad"
    ]

    found_kicad = False
    for base_path in common_kicad_paths:
        if os.path.exists(base_path):
            logger.info(f"Found KiCAD installation at: {base_path}")
            # List versions
            try:
                versions = [d for d in os.listdir(base_path) if os.path.isdir(os.path.join(base_path, d))]
                logger.info(f"  Versions found: {', '.join(versions)}")
                for version in versions:
                    python_path = os.path.join(base_path, version, 'lib', 'python3', 'dist-packages')
                    if os.path.exists(python_path):
                        logger.info(f"  ✓ Python path exists: {python_path}")
                        found_kicad = True
                    else:
                        logger.warning(f"  ✗ Python path missing: {python_path}")
            except Exception as e:
                logger.warning(f"  Could not list versions: {e}")

    if not found_kicad:
        logger.warning("No KiCAD installations found in standard locations!")
        logger.warning("Please ensure KiCAD 9.0+ is installed from https://www.kicad.org/download/windows/")

    logger.info("========================================")

# Add utils directory to path for imports
utils_dir = os.path.join(os.path.dirname(__file__))
if utils_dir not in sys.path:
    sys.path.insert(0, utils_dir)

# Import platform helper and add KiCAD paths
from utils.platform_helper import PlatformHelper
from utils.kicad_process import check_and_launch_kicad, KiCADProcessManager

logger.info(f"Detecting KiCAD Python paths for {PlatformHelper.get_platform_name()}...")
paths_added = PlatformHelper.add_kicad_to_python_path()

if paths_added:
    logger.info("Successfully added KiCAD Python paths to sys.path")
else:
    logger.warning("No KiCAD Python paths found - attempting to import pcbnew from system path")

logger.info(f"Current Python path: {sys.path}")

# Check if auto-launch is enabled
AUTO_LAUNCH_KICAD = os.environ.get("KICAD_AUTO_LAUNCH", "false").lower() == "true"
if AUTO_LAUNCH_KICAD:
    logger.info("KiCAD auto-launch enabled")

# Import KiCAD's Python API
try:
    logger.info("Attempting to import pcbnew module...")
    import pcbnew  # type: ignore
    logger.info(f"Successfully imported pcbnew module from: {pcbnew.__file__}")
    logger.info(f"pcbnew version: {pcbnew.GetBuildVersion()}")
except ImportError as e:
    logger.error(f"Failed to import pcbnew module: {e}")
    logger.error(f"Current sys.path: {sys.path}")

    # Platform-specific help message
    help_message = ""
    if sys.platform == 'win32':
        help_message = """
Windows Troubleshooting:
1. Verify KiCAD is installed: C:\\Program Files\\KiCad\\9.0
2. Check PYTHONPATH environment variable points to:
   C:\\Program Files\\KiCad\\9.0\\lib\\python3\\dist-packages
3. Test with: "C:\\Program Files\\KiCad\\9.0\\bin\\python.exe" -c "import pcbnew"
4. Log file location: %USERPROFILE%\\.kicad-mcp\\logs\\kicad_interface.log
5. Run setup-windows.ps1 for automatic configuration
"""
    elif sys.platform == 'darwin':
        help_message = """
macOS Troubleshooting:
1. Verify KiCAD is installed: /Applications/KiCad/KiCad.app
2. Check PYTHONPATH points to KiCAD's Python packages
3. Run: python3 -c "import pcbnew" to test
"""
    else:  # Linux
        help_message = """
Linux Troubleshooting:
1. Verify KiCAD is installed: apt list --installed | grep kicad
2. Check: /usr/lib/kicad/lib/python3/dist-packages exists
3. Test: python3 -c "import pcbnew"
"""

    logger.error(help_message)

    error_response = {
        "success": False,
        "message": "Failed to import pcbnew module - KiCAD Python API not found",
        "errorDetails": f"Error: {str(e)}\n\n{help_message}\n\nPython sys.path:\n{chr(10).join(sys.path)}"
    }
    print(json.dumps(error_response))
    sys.exit(1)
except Exception as e:
    logger.error(f"Unexpected error importing pcbnew: {e}")
    logger.error(traceback.format_exc())
    error_response = {
        "success": False,
        "message": "Error importing pcbnew module",
        "errorDetails": str(e)
    }
    print(json.dumps(error_response))
    sys.exit(1)

# Import command handlers
try:
    logger.info("Importing command handlers...")
    from commands.project import ProjectCommands
    from commands.board import BoardCommands
    from commands.component import ComponentCommands
    from commands.routing import RoutingCommands
    from commands.design_rules import DesignRuleCommands
    from commands.export import ExportCommands
    from commands.schematic import SchematicManager
    from commands.component_schematic import ComponentManager
    from commands.connection_schematic import ConnectionManager
    from commands.library_schematic import LibraryManager as SchematicLibraryManager
    from commands.library import LibraryManager as FootprintLibraryManager, LibraryCommands
    logger.info("Successfully imported all command handlers")
except ImportError as e:
    logger.error(f"Failed to import command handlers: {e}")
    error_response = {
        "success": False,
        "message": "Failed to import command handlers",
        "errorDetails": str(e)
    }
    print(json.dumps(error_response))
    sys.exit(1)

class KiCADInterface:
    """Main interface class to handle KiCAD operations"""

    def __init__(self):
        """Initialize the interface and command handlers"""
        self.board = None
        self.project_filename = None

        logger.info("Initializing command handlers...")

        # Initialize footprint library manager
        self.footprint_library = FootprintLibraryManager()

        # Initialize command handlers
        self.project_commands = ProjectCommands(self.board)
        self.board_commands = BoardCommands(self.board)
        self.component_commands = ComponentCommands(self.board, self.footprint_library)
        self.routing_commands = RoutingCommands(self.board)
        self.design_rule_commands = DesignRuleCommands(self.board)
        self.export_commands = ExportCommands(self.board)
        self.library_commands = LibraryCommands(self.footprint_library)

        # Schematic-related classes don't need board reference
        # as they operate directly on schematic files
        
        # Command routing dictionary
        self.command_routes = {
            # Project commands
            "create_project": self.project_commands.create_project,
            "open_project": self.project_commands.open_project,
            "save_project": self.project_commands.save_project,
            "get_project_info": self.project_commands.get_project_info,
            
            # Board commands
            "set_board_size": self.board_commands.set_board_size,
            "add_layer": self.board_commands.add_layer,
            "set_active_layer": self.board_commands.set_active_layer,
            "get_board_info": self.board_commands.get_board_info,
            "get_layer_list": self.board_commands.get_layer_list,
            "get_board_2d_view": self.board_commands.get_board_2d_view,
            "add_board_outline": self.board_commands.add_board_outline,
            "add_mounting_hole": self.board_commands.add_mounting_hole,
            "add_text": self.board_commands.add_text,
            "add_board_text": self.board_commands.add_text,  # Alias for TypeScript tool
            
            # Component commands
            "place_component": self.component_commands.place_component,
            "move_component": self.component_commands.move_component,
            "rotate_component": self.component_commands.rotate_component,
            "delete_component": self.component_commands.delete_component,
            "edit_component": self.component_commands.edit_component,
            "get_component_properties": self.component_commands.get_component_properties,
            "get_component_list": self.component_commands.get_component_list,
            "place_component_array": self.component_commands.place_component_array,
            "align_components": self.component_commands.align_components,
            "duplicate_component": self.component_commands.duplicate_component,
            
            # Routing commands
            "add_net": self.routing_commands.add_net,
            "route_trace": self.routing_commands.route_trace,
            "add_via": self.routing_commands.add_via,
            "delete_trace": self.routing_commands.delete_trace,
            "get_nets_list": self.routing_commands.get_nets_list,
            "create_netclass": self.routing_commands.create_netclass,
            "add_copper_pour": self.routing_commands.add_copper_pour,
            "route_differential_pair": self.routing_commands.route_differential_pair,
            
            # Design rule commands
            "set_design_rules": self.design_rule_commands.set_design_rules,
            "get_design_rules": self.design_rule_commands.get_design_rules,
            "run_drc": self.design_rule_commands.run_drc,
            "get_drc_violations": self.design_rule_commands.get_drc_violations,
            
            # Export commands
            "export_gerber": self.export_commands.export_gerber,
            "export_pdf": self.export_commands.export_pdf,
            "export_svg": self.export_commands.export_svg,
            "export_3d": self.export_commands.export_3d,
            "export_bom": self.export_commands.export_bom,

            # Library commands (footprint management)
            "list_libraries": self.library_commands.list_libraries,
            "search_footprints": self.library_commands.search_footprints,
            "list_library_footprints": self.library_commands.list_library_footprints,
            "get_footprint_info": self.library_commands.get_footprint_info,

            # Schematic commands
            "create_schematic": self._handle_create_schematic,
            "load_schematic": self._handle_load_schematic,
            "add_schematic_component": self._handle_add_schematic_component,
            "add_schematic_wire": self._handle_add_schematic_wire,
            "add_schematic_connection": self._handle_add_schematic_connection,
            "add_schematic_net_label": self._handle_add_schematic_net_label,
            "connect_to_net": self._handle_connect_to_net,
            "get_net_connections": self._handle_get_net_connections,
            "generate_netlist": self._handle_generate_netlist,
            "list_schematic_libraries": self._handle_list_schematic_libraries,
            "export_schematic_pdf": self._handle_export_schematic_pdf,

            # UI/Process management commands
            "check_kicad_ui": self._handle_check_kicad_ui,
            "launch_kicad_ui": self._handle_launch_kicad_ui
        }
        
        logger.info("KiCAD interface initialized")

    def handle_command(self, command: str, params: Dict[str, Any]) -> Dict[str, Any]:
        """Route command to appropriate handler"""
        logger.info(f"Handling command: {command}")
        logger.debug(f"Command parameters: {params}")
        
        try:
            # Get the handler for the command
            handler = self.command_routes.get(command)
            
            if handler:
                # Execute the command
                result = handler(params)
                logger.debug(f"Command result: {result}")
                
                # Update board reference if command was successful
                if result.get("success", False):
                    if command == "create_project" or command == "open_project":
                        logger.info("Updating board reference...")
                        # Get board from the project commands handler
                        self.board = self.project_commands.board
                        self._update_command_handlers()
                
                return result
            else:
                logger.error(f"Unknown command: {command}")
                return {
                    "success": False,
                    "message": f"Unknown command: {command}",
                    "errorDetails": "The specified command is not supported"
                }
                
        except Exception as e:
            # Get the full traceback
            traceback_str = traceback.format_exc()
            logger.error(f"Error handling command {command}: {str(e)}\n{traceback_str}")
            return {
                "success": False,
                "message": f"Error handling command: {command}",
                "errorDetails": f"{str(e)}\n{traceback_str}"
            }

    def _update_command_handlers(self):
        """Update board reference in all command handlers"""
        logger.debug("Updating board reference in command handlers")
        self.project_commands.board = self.board
        self.board_commands.board = self.board
        self.component_commands.board = self.board
        self.routing_commands.board = self.board
        self.design_rule_commands.board = self.board
        self.export_commands.board = self.board
        
    # Schematic command handlers
    def _handle_create_schematic(self, params):
        """Create a new schematic"""
        logger.info("Creating schematic")
        try:
            project_name = params.get("projectName")
            path = params.get("path", ".")
            metadata = params.get("metadata", {})
            
            if not project_name:
                return {"success": False, "message": "Project name is required"}
            
            schematic = SchematicManager.create_schematic(project_name, metadata)
            file_path = f"{path}/{project_name}.kicad_sch"
            success = SchematicManager.save_schematic(schematic, file_path)
            
            return {"success": success, "file_path": file_path}
        except Exception as e:
            logger.error(f"Error creating schematic: {str(e)}")
            return {"success": False, "message": str(e)}
    
    def _handle_load_schematic(self, params):
        """Load an existing schematic"""
        logger.info("Loading schematic")
        try:
            filename = params.get("filename")
            
            if not filename:
                return {"success": False, "message": "Filename is required"}
            
            schematic = SchematicManager.load_schematic(filename)
            success = schematic is not None
            
            if success:
                metadata = SchematicManager.get_schematic_metadata(schematic)
                return {"success": success, "metadata": metadata}
            else:
                return {"success": False, "message": "Failed to load schematic"}
        except Exception as e:
            logger.error(f"Error loading schematic: {str(e)}")
            return {"success": False, "message": str(e)}
    
    def _handle_add_schematic_component(self, params):
        """Add a component to a schematic"""
        logger.info("Adding component to schematic")
        try:
            schematic_path = params.get("schematicPath")
            component = params.get("component", {})
            
            if not schematic_path:
                return {"success": False, "message": "Schematic path is required"}
            if not component:
                return {"success": False, "message": "Component definition is required"}
            
            schematic = SchematicManager.load_schematic(schematic_path)
            if not schematic:
                return {"success": False, "message": "Failed to load schematic"}
            
            component_obj = ComponentManager.add_component(schematic, component)
            success = component_obj is not None
            
            if success:
                SchematicManager.save_schematic(schematic, schematic_path)
                return {"success": True}
            else:
                return {"success": False, "message": "Failed to add component"}
        except Exception as e:
            logger.error(f"Error adding component to schematic: {str(e)}")
            return {"success": False, "message": str(e)}
    
    def _handle_add_schematic_wire(self, params):
        """Add a wire to a schematic"""
        logger.info("Adding wire to schematic")
        try:
            schematic_path = params.get("schematicPath")
            start_point = params.get("startPoint")
            end_point = params.get("endPoint")
            
            if not schematic_path:
                return {"success": False, "message": "Schematic path is required"}
            if not start_point or not end_point:
                return {"success": False, "message": "Start and end points are required"}
            
            schematic = SchematicManager.load_schematic(schematic_path)
            if not schematic:
                return {"success": False, "message": "Failed to load schematic"}
            
            wire = ConnectionManager.add_wire(schematic, start_point, end_point)
            success = wire is not None
            
            if success:
                SchematicManager.save_schematic(schematic, schematic_path)
                return {"success": True}
            else:
                return {"success": False, "message": "Failed to add wire"}
        except Exception as e:
            logger.error(f"Error adding wire to schematic: {str(e)}")
            return {"success": False, "message": str(e)}
    
    def _handle_list_schematic_libraries(self, params):
        """List available symbol libraries"""
        logger.info("Listing schematic libraries")
        try:
            search_paths = params.get("searchPaths")
            
            libraries = LibraryManager.list_available_libraries(search_paths)
            return {"success": True, "libraries": libraries}
        except Exception as e:
            logger.error(f"Error listing schematic libraries: {str(e)}")
            return {"success": False, "message": str(e)}
    
    def _handle_export_schematic_pdf(self, params):
        """Export schematic to PDF"""
        logger.info("Exporting schematic to PDF")
        try:
            schematic_path = params.get("schematicPath")
            output_path = params.get("outputPath")
            
            if not schematic_path:
                return {"success": False, "message": "Schematic path is required"}
            if not output_path:
                return {"success": False, "message": "Output path is required"}
            
            import subprocess
            result = subprocess.run(
                ["kicad-cli", "sch", "export", "pdf", "--output", output_path, schematic_path],
                capture_output=True, 
                text=True
            )
            
            success = result.returncode == 0
            message = result.stderr if not success else ""
            
            return {"success": success, "message": message}
        except Exception as e:
            logger.error(f"Error exporting schematic to PDF: {str(e)}")
            return {"success": False, "message": str(e)}

    def _handle_add_schematic_connection(self, params):
        """Add a pin-to-pin connection in schematic"""
        logger.info("Adding pin-to-pin connection in schematic")
        try:
            schematic_path = params.get("schematicPath")
            source_ref = params.get("sourceRef")
            source_pin = params.get("sourcePin")
            target_ref = params.get("targetRef")
            target_pin = params.get("targetPin")

            if not all([schematic_path, source_ref, source_pin, target_ref, target_pin]):
                return {"success": False, "message": "Missing required parameters"}

            schematic = SchematicManager.load_schematic(schematic_path)
            if not schematic:
                return {"success": False, "message": "Failed to load schematic"}

            success = ConnectionManager.add_connection(schematic, source_ref, source_pin, target_ref, target_pin)

            if success:
                SchematicManager.save_schematic(schematic, schematic_path)
                return {"success": True}
            else:
                return {"success": False, "message": "Failed to add connection"}
        except Exception as e:
            logger.error(f"Error adding schematic connection: {str(e)}")
            return {"success": False, "message": str(e)}

    def _handle_add_schematic_net_label(self, params):
        """Add a net label to schematic"""
        logger.info("Adding net label to schematic")
        try:
            schematic_path = params.get("schematicPath")
            net_name = params.get("netName")
            position = params.get("position")

            if not all([schematic_path, net_name, position]):
                return {"success": False, "message": "Missing required parameters"}

            schematic = SchematicManager.load_schematic(schematic_path)
            if not schematic:
                return {"success": False, "message": "Failed to load schematic"}

            label = ConnectionManager.add_net_label(schematic, net_name, position)

            if label:
                SchematicManager.save_schematic(schematic, schematic_path)
                return {"success": True}
            else:
                return {"success": False, "message": "Failed to add net label"}
        except Exception as e:
            logger.error(f"Error adding net label: {str(e)}")
            return {"success": False, "message": str(e)}

    def _handle_connect_to_net(self, params):
        """Connect a component pin to a named net"""
        logger.info("Connecting component pin to net")
        try:
            schematic_path = params.get("schematicPath")
            component_ref = params.get("componentRef")
            pin_name = params.get("pinName")
            net_name = params.get("netName")

            if not all([schematic_path, component_ref, pin_name, net_name]):
                return {"success": False, "message": "Missing required parameters"}

            schematic = SchematicManager.load_schematic(schematic_path)
            if not schematic:
                return {"success": False, "message": "Failed to load schematic"}

            success = ConnectionManager.connect_to_net(schematic, component_ref, pin_name, net_name)

            if success:
                SchematicManager.save_schematic(schematic, schematic_path)
                return {"success": True}
            else:
                return {"success": False, "message": "Failed to connect to net"}
        except Exception as e:
            logger.error(f"Error connecting to net: {str(e)}")
            return {"success": False, "message": str(e)}

    def _handle_get_net_connections(self, params):
        """Get all connections for a named net"""
        logger.info("Getting net connections")
        try:
            schematic_path = params.get("schematicPath")
            net_name = params.get("netName")

            if not all([schematic_path, net_name]):
                return {"success": False, "message": "Missing required parameters"}

            schematic = SchematicManager.load_schematic(schematic_path)
            if not schematic:
                return {"success": False, "message": "Failed to load schematic"}

            connections = ConnectionManager.get_net_connections(schematic, net_name)
            return {"success": True, "connections": connections}
        except Exception as e:
            logger.error(f"Error getting net connections: {str(e)}")
            return {"success": False, "message": str(e)}

    def _handle_generate_netlist(self, params):
        """Generate netlist from schematic"""
        logger.info("Generating netlist from schematic")
        try:
            schematic_path = params.get("schematicPath")

            if not schematic_path:
                return {"success": False, "message": "Schematic path is required"}

            schematic = SchematicManager.load_schematic(schematic_path)
            if not schematic:
                return {"success": False, "message": "Failed to load schematic"}

            netlist = ConnectionManager.generate_netlist(schematic)
            return {"success": True, "netlist": netlist}
        except Exception as e:
            logger.error(f"Error generating netlist: {str(e)}")
            return {"success": False, "message": str(e)}

    def _handle_check_kicad_ui(self, params):
        """Check if KiCAD UI is running"""
        logger.info("Checking if KiCAD UI is running")
        try:
            manager = KiCADProcessManager()
            is_running = manager.is_running()
            processes = manager.get_process_info() if is_running else []

            return {
                "success": True,
                "running": is_running,
                "processes": processes,
                "message": "KiCAD is running" if is_running else "KiCAD is not running"
            }
        except Exception as e:
            logger.error(f"Error checking KiCAD UI status: {str(e)}")
            return {"success": False, "message": str(e)}

    def _handle_launch_kicad_ui(self, params):
        """Launch KiCAD UI"""
        logger.info("Launching KiCAD UI")
        try:
            project_path = params.get("projectPath")
            auto_launch = params.get("autoLaunch", AUTO_LAUNCH_KICAD)

            # Convert project path to Path object if provided
            from pathlib import Path
            path_obj = Path(project_path) if project_path else None

            result = check_and_launch_kicad(path_obj, auto_launch)

            return {
                "success": True,
                **result
            }
        except Exception as e:
            logger.error(f"Error launching KiCAD UI: {str(e)}")
            return {"success": False, "message": str(e)}

def main():
    """Main entry point"""
    logger.info("Starting KiCAD interface...")
    interface = KiCADInterface()

    try:
        logger.info("Processing commands from stdin...")
        # Process commands from stdin
        for line in sys.stdin:
            try:
                # Parse command
                logger.debug(f"Received input: {line.strip()}")
                command_data = json.loads(line)

                # Check if this is JSON-RPC 2.0 format
                if 'jsonrpc' in command_data and command_data['jsonrpc'] == '2.0':
                    logger.info("Detected JSON-RPC 2.0 format message")
                    method = command_data.get('method')
                    params = command_data.get('params', {})
                    request_id = command_data.get('id')

                    # Handle MCP protocol methods
                    if method == 'initialize':
                        logger.info("Handling MCP initialize")
                        response = {
                            'jsonrpc': '2.0',
                            'id': request_id,
                            'result': {
                                'protocolVersion': '2025-06-18',
                                'capabilities': {
                                    'tools': {
                                        'listChanged': True
                                    },
                                    'resources': {
                                        'subscribe': False,
                                        'listChanged': True
                                    }
                                },
                                'serverInfo': {
                                    'name': 'kicad-mcp-server',
                                    'title': 'KiCAD PCB Design Assistant',
                                    'version': '2.1.0-alpha'
                                },
                                'instructions': 'AI-assisted PCB design with KiCAD. Use tools to create projects, design boards, place components, route traces, and export manufacturing files.'
                            }
                        }
                    elif method == 'tools/list':
                        logger.info("Handling MCP tools/list")
                        # Return list of available tools with proper schemas
                        tools = []
                        for cmd_name in interface.command_routes.keys():
                            # Get schema from TOOL_SCHEMAS if available
                            if cmd_name in TOOL_SCHEMAS:
                                tool_def = TOOL_SCHEMAS[cmd_name].copy()
                                tools.append(tool_def)
                            else:
                                # Fallback for tools without schemas
                                logger.warning(f"No schema defined for tool: {cmd_name}")
                                tools.append({
                                    'name': cmd_name,
                                    'description': f'KiCAD command: {cmd_name}',
                                    'inputSchema': {
                                        'type': 'object',
                                        'properties': {}
                                    }
                                })

                        logger.info(f"Returning {len(tools)} tools")
                        response = {
                            'jsonrpc': '2.0',
                            'id': request_id,
                            'result': {
                                'tools': tools
                            }
                        }
                    elif method == 'tools/call':
                        logger.info("Handling MCP tools/call")
                        tool_name = params.get('name')
                        tool_params = params.get('arguments', {})

                        # Execute the command
                        result = interface.handle_command(tool_name, tool_params)

                        response = {
                            'jsonrpc': '2.0',
                            'id': request_id,
                            'result': {
                                'content': [
                                    {
                                        'type': 'text',
                                        'text': json.dumps(result)
                                    }
                                ]
                            }
                        }
                    elif method == 'resources/list':
                        logger.info("Handling MCP resources/list")
                        # Return list of available resources
                        response = {
                            'jsonrpc': '2.0',
                            'id': request_id,
                            'result': {
                                'resources': RESOURCE_DEFINITIONS
                            }
                        }
                    elif method == 'resources/read':
                        logger.info("Handling MCP resources/read")
                        resource_uri = params.get('uri')

                        if not resource_uri:
                            response = {
                                'jsonrpc': '2.0',
                                'id': request_id,
                                'error': {
                                    'code': -32602,
                                    'message': 'Missing required parameter: uri'
                                }
                            }
                        else:
                            # Read the resource
                            resource_data = handle_resource_read(resource_uri, interface)

                            response = {
                                'jsonrpc': '2.0',
                                'id': request_id,
                                'result': resource_data
                            }
                    else:
                        logger.error(f"Unknown JSON-RPC method: {method}")
                        response = {
                            'jsonrpc': '2.0',
                            'id': request_id,
                            'error': {
                                'code': -32601,
                                'message': f'Method not found: {method}'
                            }
                        }
                else:
                    # Handle legacy custom format
                    logger.info("Detected custom format message")
                    command = command_data.get("command")
                    params = command_data.get("params", {})

                    if not command:
                        logger.error("Missing command field")
                        response = {
                            "success": False,
                            "message": "Missing command",
                            "errorDetails": "The command field is required"
                        }
                    else:
                        # Handle command
                        response = interface.handle_command(command, params)

                # Send response
                logger.debug(f"Sending response: {response}")
                print(json.dumps(response))
                sys.stdout.flush()

            except json.JSONDecodeError as e:
                logger.error(f"Invalid JSON input: {str(e)}")
                response = {
                    "success": False,
                    "message": "Invalid JSON input",
                    "errorDetails": str(e)
                }
                print(json.dumps(response))
                sys.stdout.flush()

    except KeyboardInterrupt:
        logger.info("KiCAD interface stopped")
        sys.exit(0)

    except Exception as e:
        logger.error(f"Unexpected error: {str(e)}\n{traceback.format_exc()}")
        sys.exit(1)

if __name__ == "__main__":
    main()