05-schema-validation

The skill presents a coherent, self-consistent approach to enforcing schema alignment between source DataFrames and DDL-defined target schemas prior to MERGE operations. It relies on established runtime sources of truth (DDL) and provides explicit mapping and pre-merge validation. No credential or external data leakage risks are evident, and data flows stay within the data engineering tooling domain. Overall, the footprint aligns with its stated purpose and appears benign with low risk.