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trace-data-transformation

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Maps data transformation chains — Request DTO to Command to Entity to Response DTO. Identifies mappers, serializers, type conversions, and data loss points across layer boundaries.

skills/trace-data-transformation/SKILL.md

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# Data Transformation Tracer

## Overview

Traces how data transforms as it passes through application layers — from raw HTTP input through DTOs, Commands, Entities, and back to Response objects. Identifies mappers, serializers, converters, and potential data loss points.

## Transformation Chain Patterns

### Standard CQRS Chain

```
HTTP Request Body (JSON/Form)
  → Request DTO (validated input)
    → Command/Query (application layer input)
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