Centralize output contract validation

internal/promptdef/filesystem_repository.go

@@ -402,17 +402,14 @@ func normalizePromptDefinitionWithContent(raw *promptDefinitionFile, readContent
 		})
 	}
 
-	if !isValidOutputFormat(raw.Output.Format) {
-		return nil, fmt.Errorf("invalid output format: %q", raw.Output.Format)
+	outputContract := domain.OutputContract{
+		Format:         raw.Output.Format,
+		ValidationMode: raw.Output.ValidationMode,
+		SchemaPath:     strings.TrimSpace(raw.Output.SchemaPath),
+		RepairAttempts: raw.Output.RepairAttempts,
 	}
-	if !isValidValidationMode(raw.Output.ValidationMode) {
-		return nil, fmt.Errorf("invalid validation mode: %q", raw.Output.ValidationMode)
-	}
-	if raw.Output.ValidationMode == domain.ValidationJSONSchema && strings.TrimSpace(raw.Output.SchemaPath) == "" {
-		return nil, errors.New("output.schema_path is required when output.validation_mode is json_schema")
-	}
-	if raw.Output.RepairAttempts < 0 {
-		return nil, errors.New("output.repair_attempts must be greater than or equal to 0")
+	if err := domain.ValidateOutputContract(outputContract); err != nil {
+		return nil, fmt.Errorf("output: %w", err)
 	}
 
 	defaultProfile := ""
@@ -432,12 +429,7 @@ func normalizePromptDefinitionWithContent(raw *promptDefinitionFile, readContent
 		Inputs:         inputs,
 		Templates:      templates,
 		OutputFormat:   raw.Output.Format,
-		Validation: domain.OutputContract{
-			Format:         raw.Output.Format,
-			ValidationMode: raw.Output.ValidationMode,
-			SchemaPath:     strings.TrimSpace(raw.Output.SchemaPath),
-			RepairAttempts: raw.Output.RepairAttempts,
-		},
+		Validation:     outputContract,
 	}, nil
 }
 
@@ -464,21 +456,3 @@ func normalizeCacheControl(raw *cacheControlFile) (*domain.CacheControl, error)
 		TTL:  ttl,
 	}, nil
 }
-
-func isValidOutputFormat(f domain.OutputFormat) bool {
-	switch f {
-	case domain.FormatText, domain.FormatMarkdown, domain.FormatJSON:
-		return true
-	default:
-		return false
-	}
-}
-
-func isValidValidationMode(m domain.ValidationMode) bool {
-	switch m {
-	case domain.ValidationNone, domain.ValidationBasic, domain.ValidationJSON, domain.ValidationJSONSchema:
-		return true
-	default:
-		return false
-	}
-}