# 04 Built-in Tools

Script: `example/04_tools_builtin.py`.

OpenRath merges built-in filesystem and shell tools into every session loop. This example asks an agent to write a file, read it back, and run a shell command in the sandbox.

```bash
python example/04_tools_builtin.py
```

| Tool | Purpose |
| --- | --- |
| `run_shell_command` | Executes a shell command through the active backend. |
| `write_workspace_file` | Writes text into the sandbox workspace. |
| `global_system_tools()` | Lists the built-in tool table. |

Run it with a local sandbox bound to `spec="."` if you want to inspect the created file.

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