[scrps]

It would be nice to have a similar system to the language metric at the bottom of a repo, have something like a library metric that list what external libraries a project uses and feed those metrics back to the maintainers.

[nitrogen]

GitHub does show a dependency list in the sidebar for some projects.

[swiftcoder]

Unfortunately, they don't have dependency plugins for a bunch of popular languages. Even languages with well-structured dependency tracking like Rust.