Visum Thinker MCP Server

Instructions

Implementation Reference

• src/index-backup.ts:1149-1191 (registration)

  Registration of the 'project_execute' MCP tool, including input schema (Zod) and inline handler function that delegates execution to ProjectServerManager.executeCommand and formats the MCP response.

  server.tool(
    "project_execute",
    "Execute a command on a project TCP server",
    {
      projectId: z.string().describe("Project ID to execute command on"),
      code: z.string().describe("Python code to execute in the Visum context"),
      description: z.string().describe("Description of what the code does")
    },
    async ({ projectId, code, description }) => {
      try {
        const result = await serverManager.executeCommand(projectId, code, description);
        
        if (result.success) {
          return {
            content: [
              {
                type: "text",
                text: `⚡ **Comando Eseguito**\n\n✅ ${description}\n\n📊 **Risultato:**\n\`\`\`json\n${JSON.stringify(result.result, null, 2)}\n\`\`\`\n\n⏱️ **Performance:**\n- Tempo risposta: ${result.responseTimeMs}ms\n- Esecuzione VisumPy: ${result.executionTimeMs}ms`
              }
            ]
          };
        } else {
          return {
            content: [
              {
                type: "text",
                text: `❌ **Errore Esecuzione**\n\n${result.error}`
              }
            ]
          };
        }
      } catch (error) {
        return {
          content: [
            {
              type: "text",
              text: `❌ **Errore:** ${error instanceof Error ? error.message : String(error)}`
            }
          ]
        };
      }
    }
  );

• src/project-server-manager.ts:221-227 (handler)

  Core handler logic in ProjectServerManager: forwards the Python code as a 'query' command to the project's TCP server via sendCommandToServer.

  async executeCommand(projectId: string, code: string, description: string): Promise<any> {
    return await this.sendCommandToServer(projectId, {
      type: 'query',
      code,
      description
    });
  }

• src/project-server-manager.ts:229-288 (helper)

  TCP client implementation: Establishes TCP connection to the project-specific server (spawned by project_open), sends JSON command with code, receives and parses JSON response.

  async sendCommandToServer(projectId: string, command: any): Promise<any> {
    const serverInfo = this.activeServers.get(projectId);
    if (!serverInfo) {
      throw new Error('Server progetto non trovato');
    }
  
    return new Promise((resolve, reject) => {
      const client = createConnection(serverInfo.port, 'localhost');
      let buffer = '';
      
      client.on('connect', () => {
        const message = JSON.stringify({ ...command, requestId: Date.now() });
        client.write(message + '\n');
      });
  
      client.on('data', (data: any) => {
        buffer += data.toString();
        
        // Dividi per newlines per separare i messaggi
        const messages = buffer.split('\n');
        buffer = messages.pop() || ''; // Mantieni l'ultimo pezzo (potrebbe essere incompleto)
        
        for (const message of messages) {
          if (message.trim()) {
            try {
              // Rimuovi backslash-n letterali che il server TCP Python aggiunge
              const cleanedResponse = message.replace(/\\n$/g, '');
              const response = JSON.parse(cleanedResponse);
              
              // Ignora il messaggio di welcome, aspetta la risposta vera
              if (response.type === 'project_welcome') {
                continue;
              }
              
              // Risposta al comando ricevuta (query_result, save_result, error, etc.)
              if (response.type === 'query_result' || response.type === 'save_result' || 
                  response.type === 'error' || response.type === 'shutdown_ack' ||
                  response.result !== undefined) {
                client.end();
                resolve(response);
                return;
              }
            } catch (error) {
              // Ignora messaggi malformati, continua ad aspettare
              console.error('WARN: Messaggio TCP non parsabile:', message);
            }
          }
        }
      });
  
      client.on('error', (error: any) => {
        reject(error);
      });
  
      setTimeout(() => {
        client.end();
        reject(new Error('Timeout comando server'));
      }, 300000); // 5 minuti timeout per operazioni pesanti su reti grandi
    });
  }