Ensure consistent and safe handling of parameters and data across API endpoints. This includes using proper serialization methods, consistent parameter passing approaches, and context-aware processing when the same input may have different meanings.

Key practices:

Example of proper JSON serialization:

// Instead of string concatenation:
return JSON.stringify(this.name) + ":" + JSON.stringify(data);

// Use proper object serialization:
const object = { name: this.name, light: {...}, dark: {...} };
return JSON.stringify(object, null, 2);

This approach prevents security vulnerabilities, ensures predictable API behavior, and provides better developer experience through consistent interfaces.