This addons can collect hair points selection as a preset and reuse them at any time.
It saves you the trouble of repeatedly selecting hairs and saves master time.
the selection function is using C++ code to implement, scine there is no bpy api to do that.
The current feature is relatively simple, but more features will be added in future versions,
For example, you can generate preview icons from screenshots...
first ,you need a mesh with particle hair,in the edit mode select some point of hair guide that you want to save as selection. click the + button.
if you want some hair selection remove from the previous selection preset . select some points and click the remove button.
you can get it on gumroad: