Node DTO Mappers v18+

Purpose

Use this skill for DTO mapping in Node.js TypeScript code.

This variant emphasizes transport contracts, normalization, and server-side mapping boundaries where validation and persistence may differ from browser-facing view models.

When to Use

Use this skill when:

• backend services map transport DTOs to domain or persistence shapes
• scripts normalize external payloads
• mapping must sit near validation boundaries

Do

Keep mapping pure and explicit.

Validate untrusted inputs before relying on the shape.

Separate transport DTOs from internal domain or persistence models.

Do Not

Avoid leaking raw transport payloads into core logic.

Avoid skipping validation when the payload is untrusted.

Review Checklist

• Node mapping boundary is explicit.
• Validation happens before trust.
• Transport and internal shapes are separate.
• Mapping remains deterministic.

Expected Output

1. Identify Node DTO boundaries.
2. Recommend validation plus mapping.
3. Keep contracts separate from internal models.
4. Avoid raw payload leakage.
5. Produce backend-safe mapping guidance.