Apply sequence policy across loading tiers

internal/engine/load.go

@@ -32,6 +32,7 @@ type Options[T any] struct {
 	SourceVersionMode sourceVersionMode
 	destination       Path
 	placementMode     placementMode
+	sequencePolicy    sequencePolicy
 }
 
 // FilesystemContext supplies filesystem roots for imports and overlays.
@@ -162,6 +163,7 @@ func executeLoadRequest[T any](request loadRequest[T], secrets SecretBinding, lo
 	accumulator := diagnosticAccumulator{}
 	accounting := &importAccounting{}
 	mainOptions := Options[T]{Definition: request.definition, Imports: request.main.imports, Filesystem: request.main.filesystem, destination: request.main.destination.clone(), placementMode: request.main.placementMode}
+	mainOptions.sequencePolicy = request.sequencePolicy
 	mainOptions.SourceVersionMode = request.sourceVersionMode
 	mainOptions.Definition.Version = request.protectionVersion()
 	mainOptions.Overrides = request.overrides
@@ -205,6 +207,14 @@ func executeLoadRequest[T any](request loadRequest[T], secrets SecretBinding, lo
 			return nil, accumulator.loadError()
 		}
 	}
+	if request.ordinary {
+		input.composition, diagnostics = compositionForInputWithPolicy(input, request.sequencePolicy)
+		if len(diagnostics) != 0 {
+			accumulator.add(diagnostics...)
+			return nil, accumulator.loadError()
+		}
+		input.document = input.composition.root
+	}
 	if request.ordinary {
 		input, diagnostics = applyInputLayers(request.main.source, mainOptions, input)
 	} else {