I've been thinking about an R package, or maybe a more general treesitter-based package, to reorganize functions in a project. Something like a tui which shows you functions in files in folders and lets you copy and paste them around; and maybe use graph analysis to automate this, analysing function dependencies and putting each "community" of functions into one file.

Is there any interest in this? There are per-language complexities, for example R functions are often preceded by a roxygen block which ought to travel with it. Has anyone done something similar?