`pycortex` key missing in `data/files.json` and `python download.py pycortex` fails

[ganow]

In the Examples section of the README, the following command is listed:

# In ./data directory
python download.py pycortex  # Optional, required for Pycortex visualization

However, running this command fails because there is no "pycortex" key defined in data/files.json.

Steps to reproduce

cd data
python download.py pycortex

Expected behavior

Pycortex-related files (e.g., subject overlays or flatmap data) are downloaded and set up for use in evaluation.ipynb.

Actual behavior

The script exits with a key error (or similar) since "pycortex" is not present in files.json.

Question

To fix this, I would be happy to submit a PR adding a "pycortex" entry to data/files.json. Could you share the following information?

• The file(s) needed for Pycortex visualization (URL and filenames)
• The intended destination path (save_in) and any post-processing steps (e.g., unzip)