Add run manifest and logical output file contracts

internal/framework/prompt/registry.go

@@ -57,6 +57,14 @@ type Bundle struct {
 	metadata   Metadata
 }
 
+// Metadata returns metadata for the compiled prompt bundle.
+func (b *Bundle) Metadata() Metadata {
+	if b == nil {
+		return Metadata{}
+	}
+	return b.metadata
+}
+
 var promptRegistry map[string]*Bundle
 var sharedHardening string