b4 (https://b4.docs.kernel.org) is a tool for kernel-style patch and
email review workflows on lore.kernel.org. The module installs b4 and
writes its configuration to git-config's [b4] section -- b4 has no
config file of its own -- defaulting to a recommended Claude Code
review-agent wiring.
The review-editor highlighting and agent-reviewer prompt b4 ships under
misc/ are missing from its PyPI sdist; the module pulls them from the
nixpkgs packages added in NixOS/nixpkgs#543347 rather than fetching the
b4 repository itself.
Assisted-By: Claude Opus 4.8 (1M context)
