You're looking at StableBuild's Deleted PyPI mirror - where we index all deleted packages from the Python package registry.

core-framework
0.12.28

This version was deleted from PyPI around 2026-02-06. Installing fails with:
$ pip3 install core-framework==0.12.28 ERROR: Could not find a version that satisfies the requirement core-framework==0.12.28
View other deleted versions of core-framework

Install through StableBuild

You can install this package from StableBuild's PyPI snapshots from before the version was deleted:
pip3 install \ -i https://YOUR_API_KEY.pypimirror.stablebuild.com/2026-02-05/ \ core-framework==0.12.28
Sign up for StableBuild to get an API key (it's free and takes <60 seconds!)

Or, download files manually

And install manually via pip:
core_framework-0.12.28-py3-none-any.whl (283.7KB)
core_framework-0.12.28.tar.gz (367.4KB)