Add shell tool

Added shell executor and extended agent with new tools.

app.py

@@ -4,19 +4,53 @@ import requests
 import pytz
 import yaml
 from tools.final_answer import FinalAnswerTool
+import subprocess
+from typing import Dict, Optional, Union
 
 from Gradio_UI import GradioUI
 
-# Below is an example of a tool that does nothing. Amaze us with your creativity !
 @tool
-def my_cutom_tool(arg1:str, arg2:int)-> str: #it's import to specify the return type
-    #Keep this format for the description / args / args description but feel free to modify the tool
-    """A tool that does nothing yet 
+def execute_shell_command(
+    command: Union[str, list],
+    shell: bool = False,
+    cwd: Optional[str] = None,
+    env: Optional[Dict[str, str]] = None,
+    timeout: Optional[int] = None
+) -> tuple[str, str, int]:
+    """
+    Execute a shell command and return its output.
+    
     Args:
-        arg1: the first argument
-        arg2: the second argument
+        command: Command to execute (string or list of arguments)
+        shell: If True, command is executed through shell
+        cwd: Working directory for command execution
+        env: Dictionary of environment variables
+        timeout: Timeout in seconds
+    
+    Returns:
+        tuple containing (stdout, stderr, return_code)
     """
-    return "What magic will you build ?"
+    try:
+        process = subprocess.Popen(
+            command,
+            stdout=subprocess.PIPE,
+            stderr=subprocess.PIPE,
+            shell=shell,
+            cwd=cwd,
+            env=env,
+            universal_newlines=True
+        )
+
+        stdout, stderr = process.communicate(timeout=timeout)
+        return_code = process.returncode
+        
+        return stdout, stderr, return_code
+        
+    except subprocess.TimeoutExpired:
+        process.kill()
+        raise TimeoutError(f"Command timed out after {timeout} seconds")
+    except Exception as e:
+        raise RuntimeError(f"Error executing command: {str(e)}")
 
 @tool
 def get_current_time_in_timezone(timezone: str) -> str:
@@ -35,11 +69,12 @@ def get_current_time_in_timezone(timezone: str) -> str:
 
 
 final_answer = FinalAnswerTool()
+search_tool = DuckDuckGoSearchTool()
 model = HfApiModel(
-max_tokens=2096,
-temperature=0.5,
-model_id='https://wxknx1kg971u7k1n.us-east-1.aws.endpoints.huggingface.cloud',# it is possible that this model may be overloaded
-custom_role_conversions=None,
+    max_tokens=2096,
+    temperature=0.5,
+    model_id='https://wxknx1kg971u7k1n.us-east-1.aws.endpoints.huggingface.cloud',
+    custom_role_conversions=None,
 )
 
 
@@ -51,7 +86,7 @@ with open("prompts.yaml", 'r') as stream:
     
 agent = CodeAgent(
     model=model,
-    tools=[final_answer], ## add your tools here (don't remove final answer)
+    tools=[execute_shell_command, image_generation_tool, search_tool, final_answer],
     max_steps=6,
     verbosity_level=1,
     grammar=None,