legacy-behavior-snapshot

To capture legacy system behavior before migration, you identify the behavior scope, collect evidence of APIs and user flows, and generate a baseline test catalog. This snapshot serves as the single source of truth for parity validation.

A behavior catalog is a recorded baseline of existing system APIs, user flows, edge cases, and side effects. You need it at project initiation or during major refactors to validate migration parity and run regression checks.

You create a baseline test suite by snapshotting legacy behavior scope, capturing evidence, and documenting unknowns. This produces reusable baseline tests for regression validation and ensuring migration parity.

Yes, you can use this snapshot approach for major refactoring projects. It records legacy behavior and side effects to ensure parity, providing a reusable baseline test catalog for validating system changes.

Creating a legacy behavior snapshot involves identifying the behavior scope, capturing evidence of existing APIs and flows, creating baseline tests, and documenting unknowns to ensure complete migration parity validation.

Yes, the behavior snapshot captures edge cases and side effects. It records a complete range of existing system behavior to serve as the single source of truth for accurate regression and parity validation.