The new GitHub search has some more advanced features than Google, Bing, etc. do, such as Regex: https://docs.github.com/en/search-github/github-code-search/und

The new GitHub search has some more advanced features than Google, Bing, etc. do, such as Regex: https://docs.github.com/en/search-github/github-code-search/understanding-github-code-search-syntax https://docs.github.com/en/search-github/github-code-search/... Of course, they could have kept the old search (without advanced filters) open, but there is at least a sensible explanation why the new search requires being signed in.