Module tasks 

DagTask implementations for each NixOS deployment phase.

Each task reads its inputs from DagContext (predecessor outputs and shared fleet config) and writes its outputs for dependent tasks.

Structs

NixActivateTask

Activate the system profile on the target host.

NixBuildTask

Build the system closure for a single host.

NixCopyTask

Copy the built closure to the target host.

NixEvalTask

Evaluate a single host — resolve its toplevel store path.