Remove superseded configuration loaders and consolidate runtime tests

internal/promptdef/repository.go

@@ -2,11 +2,15 @@ package promptdef
 
 import (
 	"context"
+	"errors"
 
 	"gitea.maximumdirect.net/eric/promptkit/internal/domain"
 )
 
-// Repository loads prompt definitions.
+// ErrPromptDefinitionNotFound identifies an absent captured prompt definition.
+var ErrPromptDefinitionNotFound = errors.New("prompt definition not found")
+
+// Repository selects prompt definitions from a captured index.
 type Repository interface {
 	GetPromptDefinition(ctx context.Context, id string, version string) (*domain.PromptDefinition, error)
 }