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The Data Migration Expert is a specialized Claude Code skill designed to audit database transformations and schema modifications. It acts as a safety layer by identifying potential data loss risks, verifying ID mappings, and ensuring that migrations are backward-compatible and fully reversible. By following industry best practices like the multi-step 'Safe Operation Pattern,' this skill helps developers avoid common pitfalls such as unsafe column renames or destructive type changes, ultimately protecting production environments from corruption and unnecessary downtime.