> ## Documentation Index
> Fetch the complete documentation index at: https://allhandsai-fix-security-analyzer-examples.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Hello World

> The simplest possible OpenHands agent - configure an LLM, create an agent, and complete a task.

<Note>
  This example is available on GitHub: [examples/01\_standalone\_sdk/01\_hello\_world.py](https://github.com/OpenHands/software-agent-sdk/blob/main/examples/01_standalone_sdk/01_hello_world.py)
</Note>

This is the most basic example showing how to set up and run an OpenHands agent:

```python icon="python" examples/01_standalone_sdk/01_hello_world.py theme={null}
import os

from openhands.sdk import LLM, Agent, Conversation, Tool
from openhands.tools.file_editor import FileEditorTool
from openhands.tools.task_tracker import TaskTrackerTool
from openhands.tools.terminal import TerminalTool


llm = LLM(
    model="anthropic/claude-sonnet-4-5-20250929",
    api_key=os.getenv("LLM_API_KEY"),
)

agent = Agent(
    llm=llm,
    tools=[
        Tool(name=TerminalTool.name),
        Tool(name=FileEditorTool.name),
        Tool(name=TaskTrackerTool.name),
    ],
)

cwd = os.getcwd()
conversation = Conversation(agent=agent, workspace=cwd)

conversation.send_message("Write 3 facts about the current project into FACTS.txt.")
conversation.run()
print("All done!")
```

> Tip: Model name prefixes depend on your provider
>
> * Bring-your-own provider key (Anthropic/OpenAI/etc.): use that provider's prefix like `anthropic/claude-sonnet-4-5-20250929`
> * OpenHands Cloud: use `openhands/`-prefixed models like `openhands/claude-sonnet-4-5-20250929`
>
> You can set the model via `LLM_MODEL` env var and run the example code as-is.

```bash Running the Example (Direct provider key) theme={null}
export LLM_API_KEY="your-api-key"
cd agent-sdk
uv run python examples/01_standalone_sdk/01_hello_world.py
```

```bash Running the Example (OpenHands Cloud) theme={null}
export LLM_API_KEY="your-openhands-api-key"  # https://app.all-hands.dev/settings/api-keys
export LLM_MODEL="openhands/claude-sonnet-4-5-20250929"
cd agent-sdk
uv run python examples/01_standalone_sdk/01_hello_world.py
```

### LLM Configuration

Configure the language model that will power your agent:

```python theme={null}
llm = LLM(
    model=model,
    api_key=SecretStr(api_key),
    base_url=base_url,  # Optional
    service_id="agent"
)
```

### Default Agent

Use the preset agent with common built-in tools:

```python theme={null}
agent = get_default_agent(llm=llm, cli_mode=True)
```

The default agent includes BashTool, FileEditorTool, etc. See the [tools package source code](https://github.com/OpenHands/software-agent-sdk/tree/main/openhands-tools/openhands/tools) for the complete list of available tools.

### Conversation

Start a conversation to manage the agent's lifecycle:

```python theme={null}
conversation = Conversation(agent=agent, workspace=cwd)
conversation.send_message("Write 3 facts about the current project into FACTS.txt.")
conversation.run()
```

## Expected Behavior

When you run this example:

1. The agent analyzes the current directory
2. Gathers information about the project
3. Creates `FACTS.txt` with 3 relevant facts
4. Completes and exits

Example output file:

```text theme={null}
FACTS.txt
---------
1. This is a Python project using the OpenHands Software Agent SDK.
2. The project includes examples demonstrating various agent capabilities.
3. The SDK provides tools for file manipulation, bash execution, and more.
```

## Next Steps

* **[Custom Tools](/sdk/guides/custom-tools)** - Create custom tools for specialized needs
* **[Model Context Protocol (MCP)](/sdk/guides/mcp)** - Integrate external MCP servers
* **[Security Analyzer](/sdk/guides/security)** - Add security validation to tool usage