Content on GitHub is not pre-screened for safety by Microsoft. Anyone can create an account and upload malicious executables disguised as legitimate installers.

I can recommend the exact software or free alternative that fits your workflow. Share public link

If a repository claims to have the "source code" for Photoshop, they are lying. Adobe Photoshop is written in millions of lines of proprietary C++. No developer is legally allowed to share that code. Any code you download is either a virus or a wrapper for a crack (which is still a virus risk).

to understand how to install the plugin or script. Conclusion

While Adobe has an official GitHub profile, it is used exclusively for developer resources, such as: