In both the 2025.5 and 2025.5 post 1, there seems to be a python/lib/_pyrel folder.
Not sure why it's there, but I get the error below.
(I used the slim zip file).

Python 3.14.2 (main, Dec 5 2025, 20:21:42) [MSC v.1944 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
Failed calling sys.interactivehook
Traceback (most recent call last):
File "", line 542, in register_readline
AttributeError: module 'readline' has no attribute 'backend'

And when I remove the folder, and just install pyrepl with pip. The error seems fixed in 3.13.11, but not in the 3.14.2