[pjmlp]

That is more a property of shipping the whole LLVM/Clang package with the zig compiler than anything, though.

[actionfromafar]

Whatever the mechanism, it has big implications for how Zig will be used in practice.

[pjmlp]

A mechanism available to any language that feels like shipping clang.

It is also how Swift gets its C and Objective-C interop, and will have its C++ interop as well.

Or how the Java Panama project extracts header file information for native interop.