EDIT: nevermind, most of this is due to the fact that you have to keep "repo" in the search box, which I found confusing.

I quickly found the repo I wanted, but discovered that C/C++ isn't supported, so Woboq is more useful to me at the moment.

I tried to build something like this once myself, and made the mistake of going "wide" rather than "deep". That is, trying to support all languages. I think it does make sense to try to get the absolute best experience for one language. But yeah for now since C/C++ aren't supported, it's not useful for me.

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I typed "cpython" in the search box on https://sourcegraph.com/ and got no results. (I also typed "python" and got no results, which seems pretty odd.)

I would have liked to browse this repo:

https://github.com/python/cpython

I guess you have to import repositories yourself? There seem to be sample repositories, but they are in Go, and I'm interested in C/C++ (the Python interpreter, not Python source code).

I'm looking for something that uses Clang as a back end for intelligent navigation of C/C++ projects.

Also, I would like to browse the bash source code, but as far as I know it isn't available on Github. Can SourceGraph import from an arbitrary git repo?

https://savannah.gnu.org/git/?group=bash

That said I'm glad somebody is working on this problem! I like your mission statement.