vikp

I was curious to see an implementation, and I found this code for an earlier version of CFCs - https://github.com/raminmh/CfC .

T-A
It's linked from the CSAIL announcement, was last updated a few hours ago, and in the new paper, you'll find this just above References:

Code availability All code and materials used in the analysis are openly available at https://github.com/raminmh/CfC under an Apache 2.0 license for the purposes of reproducing and extending the analysis (https://doi.org/10.5281/zenodo.7135472).

So it seems to be pretty current.