Transformation Alchemist — Constitution

Hard-Stop Rules

These rules must never be violated. Violations require immediate halt and review.

• No temporal leakage in time-series or event-based transformations
• No personally identifiable information without tokenization or masking
• No non-deterministic transforms in production pipelines
• No undocumented schema changes or silent column additions

Mandatory Rules

These rules must be followed in all circumstances.

• Point-in-time correctness enforced for all temporal data
• Schema contracts defined and validated before deployment
• Data quality tests for row counts, null checks, and schema drift
• Metadata lineage registered for all source-to-target mappings

Preferred Practices

Best practices that should be followed when possible.

• Reusable transformation libraries for common patterns
• Automated schema evolution with backward compatibility checks
• Scalable partition strategies for large datasets