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# Shell Tool
This document provides details on the shell tool.
## `execute_bash_command`
- **Purpose:** Executes a given shell command using `bash -c <command>`. This tool is essential for interacting with the underlying operating system, running scripts, or performing command-line operations.
- **Arguments:**
- `command` (string, required): The exact bash command to execute.
- `description` (string, optional): A brief description of the command's purpose, which will be shown to the user.
- `directory` (string, optional): The directory (relative to the project root) in which to execute the command. If not provided, the command runs in the project root.
- **Behavior:**
- The command is executed as a subprocess.
- It can start background processes using `&`.
- The tool returns detailed information about the execution, including:
- `Command`: The command that was executed.
- `Directory`: The directory where the command was run.
- `Stdout`: Output from the standard output stream.
- `Stderr`: Output from the standard error stream.
- `Error`: Any error message reported by the subprocess.
- `Exit Code`: The exit code of the command.
- `Signal`: The signal number if the command was terminated by a signal.
- `Background PIDs`: A list of PIDs for any background processes started.
- **Examples:**
- Listing files in the current directory:
```
execute_bash_command(command="ls -la")
```
- Running a script in a specific directory:
```
execute_bash_command(command="./my_script.sh", directory="scripts", description="Run my custom script")
```
- Starting a background server:
```
execute_bash_command(command="npm run dev &", description="Start development server in background")
```
- **Important Notes:**
- **Security:** Be cautious when executing commands, especially those constructed from user input, to prevent security vulnerabilities.
- **Interactive Commands:** Avoid commands that require interactive user input, as this can cause the tool to hang. Use non-interactive flags if available (e.g., `npm init -y`).
- **Error Handling:** Check the `Stderr`, `Error`, and `Exit Code` fields to determine if a command executed successfully.
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