confctl

Upgrade confctl-managed flake configuration repositories from one NixOS/nixpkgs release to another, such as 25.11 to 26.05. Use only for NixOS release upgrades that require reading target release notes, moving nixpkgs release channels, updating release-coupled inputs such as home-manager when needed, handling NixOS release deprecations, and validating machines with confctl build. Do not use for routine flake input bumps, service updates, dependency refreshes, or ordinary staging/production rollouts that do not change the NixOS/nixpkgs release.