- merge the two contributing sections into one (PR + cross-review rule,
both real incidents, CI enforcement in present tense - the suite is
live on the homelab runner since K-114/PR #5)
- script catalog: runner is in production (PR #6 merged)
- usage: document input validation behavior (re-prompt on junk bytes,
env values abort when malformed)
- pattern: SSH root login prompt (sshd drop-in) and the locale fix in
setup_base_apt
- repo layout: tests/ added
l.kirchner