Task configuration:
{"task_id": "06", "task_name": "create_sphere", "description": "Create an additive sphere with specified radius in FreeCAD and save it", "application_info": {"name": "FreeCAD", "executable_path": "/usr/local/bin/FreeCAD", "args": []}, "task_parameters": {"source_path": "/FreeCAD/", "filename": "task06.FCStd", "radius": 8}, "instruction_template": "The application is already open. In FreeCAD, create an additive sphere with radius ${radius} (typeid = additive sphere). Create it using 'create an additive sphere', and save the file to ${source_path}${filename}", "evaluation_setup": {"scripts": [{"role": "hook", "path": "hooker.js"}, {"role": "handler", "path": "handler.py"}], "timeout": 120}, "preconditions": {"FreeCAD_running": true}, "total_key_steps": 2, "events": {"script_initialized": {"description": "Hook script initialized", "is_key_step": false}, "function_found": {"description": "Found document save function", "is_key_step": false}, "function_called": {"description": "Document save function was called", "is_key_step": true, "key_step_index": 1, "key_step_name": "Save document"}, "function_key_word_detected": {"description": "Detected document save key content", "is_key_step": true, "key_step_index": 2, "key_step_name": "Successfully created sphere and saved"}, "error": {"description": "Error event", "is_key_step": false}}, "mcp_servers": [{"command": "python3", "args": ["/home/agent/.local/share/FreeCAD/Mod/freecad_mcp/src/freecad_bridge.py"]}]}

Hook script:
// FreeCAD Sphere Creation Monitoring Hook Script
// Used to monitor FreeCAD's sphere creation operations and detect any queries
// After creating a sphere and saving the file, the test program listens for the save event and checks if a sphere exists in the corresponding document

(function() {
  // Script constants
  const FUNCTION_NAME = "_ZNK3App8Document10saveToFileEPKc"
  const ORIGIN_FUNCTION_NAME = "Document::saveToFile"
  const FUNCTION_BEHAVIOR = "document saving"

  const SCRIPT_INITIALIZED = "script_initialized"
  const FUNCTION_NOT_FOUND = "function_not_found"
  const FUNCTION_FOUND = "function_found"
  const FUNCTION_CALLED = "function_called"
  const FUNCTION_KEY_WORD_DETECTED = "function_key_word_detected"
  const ERROR = "error"
  const HOOK_INSTALLED = "hook_installed"

  const APP_NAME = "FreeCAD"
  
  let funcFound = false;
  
  function sendEvent(eventType, data = {}) {
      const payload = {
          event: eventType,
          ...data,
          timestamp: new Date().getTime()
      };
      send(payload);
  }
  
  function getFunction() {
      let FuncAddr = DebugSymbol.getFunctionByName(FUNCTION_NAME);
      if (!FuncAddr) {
          sendEvent(ERROR, {
              error_type: FUNCTION_NOT_FOUND,
              message: `Could not find ${ORIGIN_FUNCTION_NAME} function`
          });
          return null;
      }
      funcFound = true;
      sendEvent(FUNCTION_FOUND, {
          address: FuncAddr.toString(),
          message: `Found ${ORIGIN_FUNCTION_NAME} function`
      });
      return FuncAddr;
  }
  
  function initHook() {
      sendEvent(SCRIPT_INITIALIZED, {
          message: `${APP_NAME} ${FUNCTION_BEHAVIOR} monitoring script started`
      });
      const funcAddr = getFunction();
      if (!funcAddr) {
          return;
      }
      Interceptor.attach(funcAddr, {
          onEnter: function(args) {
              try {
                  sendEvent(FUNCTION_CALLED, {
                      message: `Intercepted ${FUNCTION_BEHAVIOR} function call`
                  });
                  this.filename = args[1].readCString();
              } catch (error) {
                  sendEvent(ERROR, {
                      error_type: "general_error",
                      message: `Execution error: ${error.message}`
                  });
              }
          },
          onLeave: function(retval) {
              try {
                if (retval) {
                    const pythonCode = `
import freecad
import FreeCAD
file_path = '${this.filename}'
doc = FreeCAD.open(file_path)
if doc is None:
    result = None
else:
    sphere = None
    for obj in reversed(doc.Objects):
        if "Sphere" in obj.TypeId:
            sphere = obj
            break
    if sphere is None:
        result = None
    else:
        result = {
            "radius": sphere.Radius.Value
        }
                    `
                    sendEvent(FUNCTION_KEY_WORD_DETECTED, {
                        message: `Detected ${FUNCTION_BEHAVIOR} operation`,
                        filename: this.filename,
                        code: pythonCode
                    });
                }
              } catch (error) {
                  sendEvent(ERROR, {
                      error_type: "general_error",
                      message: `Execution error: ${error.message}`
                  });
              }
          }
      });
      sendEvent(HOOK_INSTALLED, {
          message: `Hook installation complete, waiting for ${FUNCTION_BEHAVIOR} operation...`
      });
  }
  initHook();
})();


Evaluation handler:
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
FreeCAD Sphere Creation Task Event Handler
Responsible for processing events from the hook script and returning status updates
"""
from typing import Dict, Any, Optional, List

# Event type constants
SCRIPT_INITIALIZED = "script_initialized"
FUNCTION_NOT_FOUND = "function_not_found"
FUNCTION_FOUND = "function_found"
FUNCTION_CALLED = "function_called"
FUNCTION_KEY_WORD_DETECTED = "function_key_word_detected"
ERROR = "error"
HOOK_INSTALLED = "hook_installed"

# Keyword related constants
RADIUS = "radius"

def execute_python_code(code: str, logger: Any) -> Dict[str, Any]:
    """
    Execute Python code and return the results
    """
    try:
        namespace = {}
        exec(code, namespace)
        result = namespace.get('result', None)
        if result is None:
            logger.warning("Sphere object not found")
            return None
        if RADIUS not in result:
            logger.error(f"Result missing required key: {RADIUS}")
            return None
        return result
    except Exception as e:
        logger.error(f"Error executing Python code: {str(e)}")
        return None

def message_handler(message: Dict[str, Any], logger: Any, task_parameter: Dict[str, Any]) -> Optional[List[Dict[str, Any]]]:
    """
    Process messages received from the hook script
    
    Args:
        message: Frida message object
        logger: Logger
        task_parameter: Task parameters
        
    Returns:
        Optional[List[Dict[str, Any]]]: List of status updates, or None if no updates
    """
    updates = []
    if message.get('type') == 'send' and 'payload' in message:
        payload = message['payload']
        if 'event' in payload:
            event_type = payload['event']
            logger.debug(f"Received event: {event_type}")
            if event_type == SCRIPT_INITIALIZED:
                logger.info(f"Hook script initialized: {payload.get('message', '')}")
            elif event_type == FUNCTION_FOUND:
                logger.info(f"Function found: {payload.get('address', '')}")
            elif event_type == FUNCTION_CALLED:
                logger.info(f"Function called: {payload.get('message', '')}")
                updates.append({
                    'status': 'key_step',
                    'index': 1,
                    'name': 'Save document'
                })
            elif event_type == FUNCTION_KEY_WORD_DETECTED:
                code = payload.get('code', '')
                filename = payload.get('filename', '')
                expected_path = task_parameter.get("source_path", "") + task_parameter.get("filename", "")
                logger.info(f"Keyword detected, document path: {filename}, expected path: {expected_path}")
                if filename == expected_path:
                    result = execute_python_code(code, logger)
                    if result:
                        expected_radius = task_parameter.get(RADIUS, 8)
                        actual_radius = result[RADIUS]
                        logger.debug(f"Expected radius: {expected_radius}, Actual radius: {actual_radius}")
                        if actual_radius == expected_radius:
                            updates.append({
                                'status': 'key_step',
                                'index': 2,
                                'name': 'Successfully created sphere and saved'
                            })
                            updates.append({
                                'status': 'success',
                                'reason': f'Successfully created a sphere with radius {actual_radius} and saved it'
                            })
            elif event_type == ERROR:
                error_type = payload.get("error_type", "unknown")
                error_message = payload.get("message", "Unknown error")
                logger.error(f"Hook script error ({error_type}): {error_message}")
                updates.append({
                    'status': 'error',
                    'type': error_type,
                    'message': error_message
                })
    elif message.get('type') == 'error':
        logger.error(f"Hook script error: {message.get('stack', '')}")
        updates.append({
            'status': 'error',
            'type': 'script_error',
            'message': message.get('stack', 'Unknown error')
        })
    return updates if updates else None