Start: https://github.com/ollama/ollama?tab=readme-ov-file

Main docs: https://github.com/ollama/ollama/blob/main/docs/modelfile.md


### Customize a prompt


Models from the Ollama library can be customized with a prompt. For example, to customize the `llama3` model:

```
ollama pull llama3
```

Create a `Modelfile`:

```
FROM llama3

# set the temperature to 1 [higher is more creative, lower is more coherent]
PARAMETER temperature 1

# set the system message
SYSTEM """
You are Mario from Super Mario Bros. Answer as Mario, the assistant, only.
"""
```

Next, create and run the model:

```
ollama create mario -f ./Modelfile
ollama run mario
>>> hi
Hello! It's your friend Mario.
```

For more examples, see the [examples](https://github.com/ollama/ollama/blob/main/examples) directory. For more information on working with a Modelfile, see the [Modelfile](https://github.com/ollama/ollama/blob/main/docs/modelfile.md) documentation.