Ensure configuration files maintain both consistency and currency across all services. Configuration values should follow established patterns within the codebase and use up-to-date versions for runtimes and dependencies. Key practices: - Apply consistent validation modes across all service configurations (e.g., `configValidationMode: error`) - Keep runtime versions current and avoid outdated versions - Review configuration files for both standardization and version currency Example from serverless.yml: ```yaml service: my-service configValidationMode: error # Consistent validation across services provider: name: aws runtime: nodejs16.x # Use current runtime versions, not nodejs12.x ``` This ensures reliable deployments and reduces configuration drift between services while maintaining security and compatibility with current platform features.