MCP NodeJS Debugger

Instructions

Implementation Reference

• src/mcp-server.js:783-811 (handler)

  The main handler function that executes the delete_breakpoint tool logic: ensures debugger enabled, sends 'Debugger.removeBreakpoint' command to the inspector WebSocket, removes from local breakpoints tracking, and returns success/error message.

  async ({ breakpointId }) => {
    try {
      // Ensure debugger is enabled
      if (!inspector.debuggerEnabled) {
        await inspector.enableDebugger();
      }
      
      await inspector.send('Debugger.removeBreakpoint', {
        breakpointId: breakpointId
      });
      
      // Remove from our local tracking
      inspector.breakpoints.delete(breakpointId);
      
      return {
        content: [{
          type: "text",
          text: `Breakpoint ${breakpointId} removed`
        }]
      };
    } catch (err) {
      return {
        content: [{
          type: "text",
          text: `Error removing breakpoint: ${err.message}`
        }]
      };
    }
  }

• src/mcp-server.js:780-782 (schema)

  Input schema definition using Zod for the breakpointId parameter.

  {
    breakpointId: z.string().describe("ID of the breakpoint to remove")
  },

• src/mcp-server.js:777-812 (registration)

  Registration of the delete_breakpoint tool on the MCP server using server.tool, including name, description, schema, and handler.

  server.tool(
    "delete_breakpoint",
    "Deletes a specified breakpoint",
    {
      breakpointId: z.string().describe("ID of the breakpoint to remove")
    },
    async ({ breakpointId }) => {
      try {
        // Ensure debugger is enabled
        if (!inspector.debuggerEnabled) {
          await inspector.enableDebugger();
        }
        
        await inspector.send('Debugger.removeBreakpoint', {
          breakpointId: breakpointId
        });
        
        // Remove from our local tracking
        inspector.breakpoints.delete(breakpointId);
        
        return {
          content: [{
            type: "text",
            text: `Breakpoint ${breakpointId} removed`
          }]
        };
      } catch (err) {
        return {
          content: [{
            type: "text",
            text: `Error removing breakpoint: ${err.message}`
          }]
        };
      }
    }
  );