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feat: Add JSON-RPC 2.0 MCP protocol support for Claude Desktop

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This commit fixes Windows Claude Desktop compatibility by implementing
proper MCP JSON-RPC 2.0 protocol handling in the Python interface.

Changes:
- Added JSON-RPC 2.0 message detection and handling
- Implemented MCP protocol methods: initialize, tools/list, tools/call
- Maintained backwards compatibility with legacy custom format
- Removed accidentally included typescript-sdk directory

Fixes #5 - Claude Desktop not working on Windows

Credit to @spplecxer for identifying the issue and providing the fix.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>
This commit is contained in:
KiCAD MCP Bot
2025-11-05 21:27:41 -05:00
parent 5717a91a59
commit 1ca3e1b5db
120 changed files with 95 additions and 47781 deletions
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112
python/kicad_interface.py
View File

@@ -510,7 +510,7 @@ def main():
"""Main entry point"""
logger.info("Starting KiCAD interface...")
interface = KiCADInterface()
try:
logger.info("Processing commands from stdin...")
# Process commands from stdin
@@ -519,25 +519,103 @@ def main():
# Parse command
logger.debug(f"Received input: {line.strip()}")
command_data = json.loads(line)
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"
}
# 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': {}
},
'serverInfo': {
'name': 'kicad-mcp-server',
'version': '0.1.0'
}
}
}
elif method == 'tools/list':
logger.info("Handling MCP tools/list")
# Return list of available tools
tools = []
for cmd_name in interface.command_routes.keys():
tools.append({
'name': cmd_name,
'description': f'KiCAD command: {cmd_name}',
'inputSchema': {
'type': 'object',
'properties': {}
}
})
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)
}
]
}
}
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 command
response = interface.handle_command(command, params)
# 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 = {
@@ -547,11 +625,11 @@ def main():
}
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)