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

skill-sdk
1.2.0

This version was deleted from PyPI around 2023-10-09. Installing fails with:
$ pip3 install skill-sdk==1.2.0 ERROR: Could not find a version that satisfies the requirement skill-sdk==1.2.0
View other deleted versions of skill-sdk

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/2023-10-08/ \ skill-sdk==1.2.0
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Or, download files manually

And install manually via pip:
skill_sdk-1.2.0-py3-none-any.whl (718.4KB)
skill-sdk-1.2.0.tar.gz (691.4KB)