MCP NodeJS Debugger

Instructions

Implementation Reference

• src/mcp-server.js:1133-1165 (handler)

  The handler function for the 'retry_connect' tool. It optionally updates the port, disconnects the current WebSocket if connected, resets the retry count, and initializes a new connection attempt to the Node.js debugger.

  async ({ port }) => {
    try {
      // If a new port is specified, update the inspector's port
      if (port && port !== inspector.port) {
        inspector.port = port;
      }
      
      // If already connected, disconnect first
      if (inspector.connected && inspector.ws) {
        inspector.ws.close();
        inspector.connected = false;
  inspector.debuggerEnabled = false;
      }
      
      // Reset retry count and initialize
      inspector.retryCount = 0;
      inspector.initialize();
      
      return {
        content: [{
          type: "text",
          text: `Attempting to connect to Node.js debugger on port ${inspector.port}...`
        }]
      };
    } catch (err) {
      return {
        content: [{
          type: "text",
          text: `Error initiating connection retry: ${err.message}`
        }]
      };
    }
  }

• src/mcp-server.js:1130-1132 (schema)

  The input schema definition for the 'retry_connect' tool, specifying an optional 'port' parameter using Zod validation.

  {
    port: z.number().optional().describe("Optional port to connect to. Defaults to current port (9229)")
  },

• src/mcp-server.js:1127-1166 (registration)

  The registration of the 'retry_connect' tool using server.tool(), including the tool name, description, input schema, and inline handler function.

  server.tool(
    "retry_connect",
    "Manually triggers a reconnection attempt to the Node.js debugger",
    {
      port: z.number().optional().describe("Optional port to connect to. Defaults to current port (9229)")
    },
    async ({ port }) => {
      try {
        // If a new port is specified, update the inspector's port
        if (port && port !== inspector.port) {
          inspector.port = port;
        }
        
        // If already connected, disconnect first
        if (inspector.connected && inspector.ws) {
          inspector.ws.close();
          inspector.connected = false;
  		inspector.debuggerEnabled = false;
        }
        
        // Reset retry count and initialize
        inspector.retryCount = 0;
        inspector.initialize();
        
        return {
          content: [{
            type: "text",
            text: `Attempting to connect to Node.js debugger on port ${inspector.port}...`
          }]
        };
      } catch (err) {
        return {
          content: [{
            type: "text",
            text: `Error initiating connection retry: ${err.message}`
          }]
        };
      }
    }
  );