Hi @User, there's not a good way to modify a parameters file directly (it's meant to used strictly for input). The right approach here would be to make a dataset to store those column names in. If you set

versioned: true

then you can keep track of the file over time as well. There are types like

yaml.YAMLDataSet

available for this sort of thing: https://kedro.readthedocs.io/en/stable/kedro.extras.datasets.html