Commit managed activation selections and reconcile forward (WI-05)

nix/checked-candidate.nix

@@ -155,6 +155,9 @@ assert pkgs.lib.assertMsg (!execution || kind == "workspace")
   "Execution packages must be checked in their complete workspace; run qx-workspace check from the workspace root.";
 pkgs.runCommand (if contractOnly then "qx-contract" else "qx-checked-candidate") { } ''
   mkdir -p "$out"
+  cp ${
+    pkgs.writeText "qx-candidate-source.json" (builtins.toJSON { inherit repository commit kind; })
+  } "$out/source.json"
   cp ${contract}/candidate.json "$out/candidate.json"
   cp ${contract}/graph.json "$out/graph.json"
   cp ${manifest} "$out/checks.json"