parity-check-audit

What problem does it solve?

This Skill prevents silent regressions and ensures that critical features and behaviors are preserved when comparing different versions of an application, such as during rewrites, migrations, or refactors.

Core Features & Use Cases

• Structural Mapping: Compares file inventories, dependencies, and configurations between versions.
• Feature Verification: Systematically checks if all original features are present and behave as expected in the new version.
• Deep Comparison: Performs line-level analysis to catch subtle logic differences and common regression patterns.
• Use Case: After a major refactor of your authentication module, use this skill to confirm that all login methods, password reset flows, and session management behaviors from the old version are still fully functional and identical in the new version.

Quick Start

Use the parity-check-audit skill to compare the local directory './app-v1' against './app-v2' with a standard depth.