Agent Skills: dnf5-security-updates-knowledge-patch

DNF5 security and package management changes since training cutoff — advisory command (replaces updateinfo), security upgrade flags, automatic updates, offline upgrades, versionlock TOML, config-manager subcommands, needs-restarting defaults, Ansible dnf5 module, replay command. This skill should be used when writing DNF5 commands, Ansible dnf5 playbooks, or configuring dnf5-automatic.