Select committed validation inputs by module

internal/validation/diagnostic.go

@@ -25,6 +25,8 @@ const (
 	FileSize Check = "file-size"
 	// MarkdownLinks identifies missing committed Markdown destinations or anchors.
 	MarkdownLinks Check = "markdown-links"
+	// SharedFiles identifies a requested shared file that is unavailable.
+	SharedFiles Check = "shared-files"
 )
 
 // Finding describes a validation observation at an optional source location.