How to remove dependency on core 'stable' theme

@RedEight: did you encounter any issues be changing base theme to stable9? I am this month in the process of migrating to Drupal 10.

The contrib version of 'Stable' theme also seems to work. I haven't completed an upgrade to D10 to see how that goes, but Upgrade Progress report is happy.

Is there a good reason why in the latest 5.2 release a dependency was added to the contrib stable project instead of using stable9 which is shipped with Drupal 10.x?

I did not experience any incompatibilities on my sites with stable9 but maybe there are?

Personally, I prefer using as few contrib code as possible...

hi,
go to /themes/contrib/adaptivetheme/at_core
edit at_core.info.yml

base theme: stable9
dependencies:
- stable9:stable9

and check in subtheme info file;
core_version_requirement: '^9.3 || ^10'

Here is a patch replacing stable with stable9.

The patch #11 was working for version 5.2, however it no longer applies to version 7.1.0

best solution is install stable theme from this link, i do this.

https://www.drupal.org/project/stable →

this them is hidden and not shown in themes.
in stable.info.yml set hidden: false.