LLMs might be able to hallucinate RFC text, but they certainly can't compile a patched Linux 6.6 kernel with a working AF_INET8 socket family, patch musl/iproute2/frr, spawn a 10-node QEMU mesh, and route 112,000 active FIB entries under live traffic.
The source code and commit history are right there in the GitLab repos - feel free to pull the kernel tree and run the test suite yourself.