feat: track Decman configuration

system-config/source.py

@@ -0,0 +1,14 @@
+"""Decman entrypoint for this machine.
+
+Select one profile only. The package lists describe the complete current laptop
+state, so the first Decman run must not remove a package.
+"""
+
+import decman
+
+from modules.packages import configure_no_removal_guard
+from hosts import laptop
+
+configure_no_removal_guard()
+decman.modules += laptop()
+decman.execution_order = ["files", "pacman", "aur", "systemd"]