This guide will help you get started with contributing to Opik's documentation.

:::callout{intent="tip"}
Before you start, please review our general [Contribution Overview](https://www.comet.com/contributing/overview) and the [Contributor
License Agreement (CLA)](https://github.com/comet-ml/opik/blob/main/CLA.md).
:::

## Documentation Structure

This guide covers how to contribute to the two main parts of Opik's documentation: **This Documentation Website**: Built with [Fern](https://www.buildwithfern.com/) and **Python SDK Reference Documentation**: Built with [Sphinx](https://www.sphinx-doc.org/en/master/).

Here's how you can work with either one:

::::::accordion-group
:::::accordion{title="Contributing to this Documentation Website (Fern)"}
This website (source in `apps/opik-documentation/documentation`) is where our main guides, tutorials, and conceptual documentation live.

::::steps{titleSize="h3"}
:::step{title="1. Install Prerequisites"}
Ensure you have Node.js and npm installed. You can follow the official guide [here](https://docs.npmjs.com/downloading-and-installing-node-js-and-npm/).
:::

:::step{title="2. Set up Locally"}
```bash
cd apps/opik-documentation/documentation

# Install dependencies - Only needs to be run once
npm install

# Optional - Install Python dependencies if updating Jupyter Cookbooks
pip install -r requirements.txt

# Run the documentation website locally
npm run dev


```

Access the local site at `http://localhost:3000`. Changes will update in real-time.
:::

:::step{title="3. Make Your Changes"}
Update content primarily in:

- `fern/docs-v2/`: Main markdown content (like this page).
- `/docs/cookbook`: Source Jupyter Notebooks for the cookbook examples. These are not converted automatically — if you change a notebook, update the matching `fern/docs-v2/**/*.mdx` page in the same PR to keep the published page in step.

Refer to the `docs.yml` file for the overall structure and navigation.
:::

:::step{title="4. Submitting Changes"}
Once you're happy with your changes, commit them and open a Pull Request against the `main` branch of the `comet-ml/opik` repository.
:::
::::
:::::

:::::accordion{title="Contributing to the Python SDK Reference Documentation (Sphinx)"}
The Python SDK reference docs (source in `apps/opik-documentation/python-sdk-docs`) are generated from docstrings in the Python codebase using [Sphinx](https://www.sphinx-doc.org/en/master/).

::::steps{titleSize="h3"}
:::step{title="1. Install Prerequisites"}
Ensure you have Python and pip installed. A virtual environment is highly recommended.
:::

:::step{title="2. Set up Locally"}
```bash
cd apps/opik-documentation/python-sdk-docs
# Install dependencies - Only needs to be run once
pip install -r requirements.txt
# Run the python sdk reference documentation locally
make dev
```

Access the local site at `http://127.0.0.1:8000`. Changes will update in real-time as you modify docstrings in the SDK (`sdks/python`) and rebuild.
:::

:::step{title="3. Making Changes"}
Improvements to the SDK reference usually involve updating the Python docstrings directly in the SDK source files located in the `sdks/python` directory.
:::

:::step{title="4. Building and Previewing"}
After editing docstrings, run `make dev` (or `make html` for a one-time build) in the `apps/opik-documentation/python-sdk-docs` directory to regenerate the HTML and preview your changes.
:::

:::step{title="5. Submitting Changes"}
Commit your changes to both the Python SDK source files and any necessary updates in the `python-sdk-docs` directory. Open a Pull Request against the `main` branch.
:::
::::
:::::
::::::

## Related pages

- [Local Development Setup](./contributing-guides-local-development.md)
- [Python SDK](./contributing-guides-python-sdk.md)
- [TypeScript SDK](./contributing-guides-typescript-sdk.md)
- [Opik Optimizer](./contributing-guides-agent-optimizer-sdk.md)
- [Frontend](./contributing-guides-frontend.md)
- [Backend](./contributing-guides-backend.md)

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