i’ve been giving the example of libraries vs binaries, but this applies throughout the graph: even when a library depends on a library.

To be clear, that enhancement only works if we make a breaking change to how ICs work: they must include the ICs of all transitive deps, not just the source files themselves. Is that right? With binaries and tests, you mentioned that seems more reasonable to ask. I do think we'd need the same restriction on all

python_library

targets too, given how MyPy and Pylint operate on them