Playwright MCP Server

Instructions

Implementation Reference

• src/tools/codegen/index.ts:160-180 (handler)

  Full tool definition including the handler function that retrieves and returns the codegen session data by sessionId using ActionRecorder.

  export const getCodegenSession: Tool = {
    name: 'get_codegen_session',
    description: 'Get information about a code generation session',
    parameters: {
      type: 'object',
      properties: {
        sessionId: {
          type: 'string',
          description: 'ID of the session to retrieve'
        }
      },
      required: ['sessionId']
    },
    handler: async ({ sessionId }: { sessionId: string }) => {
      const session = ActionRecorder.getInstance().getSession(sessionId);
      if (!session) {
        throw new Error(`Session ${sessionId} not found`);
      }
      return session;
    }
  };

• src/toolHandler.ts:355-364 (registration)

  Registration and dispatch logic in the main tool handler that calls the getCodegenSession.handler for 'get_codegen_session' tool calls.

  switch (name) {
    case 'start_codegen_session':
      return await handleCodegenResult(startCodegenSession.handler(args));
    case 'end_codegen_session':
      return await handleCodegenResult(endCodegenSession.handler(args));
    case 'get_codegen_session':
      return await handleCodegenResult(getCodegenSession.handler(args));
    case 'clear_codegen_session':
      return await handleCodegenResult(clearCodegenSession.handler(args));
  }

• src/tools.ts:50-63 (schema)

  MCP SDK tool definition with input schema for validating get_codegen_session parameters.

  {
    name: "get_codegen_session",
    description: "Get information about a code generation session",
    inputSchema: {
      type: "object",
      properties: {
        sessionId: { 
          type: "string", 
          description: "ID of the session to retrieve" 
        }
      },
      required: ["sessionId"]
    }
  },

• src/toolHandler.ts:8-12 (registration)

  Import statement that brings the getCodegenSession tool into the main tool handler.

    startCodegenSession,
    endCodegenSession,
    getCodegenSession,
    clearCodegenSession
  } from './tools/codegen/index.js';