dep-upgrade

To upgrade a dependency without breaking production, read the official migration guide, build a breaking change inventory, map impacted callsites, and write behavior characterization tests to verify completion before shipping.

The best way to prepare for breaking changes during a library migration is to classify risks by change type, generate an impact table locating affected files and lines, and lock in current behavior with regression tests before bumping versions.

Reading the migration guide instead of just release notes is necessary because release notes often hide real breaking changes, leading to missed migration steps and unexpected runtime or behavioral regressions in your specific codebase.

To verify a dependency upgrade is complete and safe across multiple services, execute full test and audit runs after applying fixes identified in your impact table to ensure no breaking changes silently reached production.

Yes, you need to write behavior characterization tests before upgrading a framework to lock in current behavior, ensuring that any behavior changes introduced by the new dependency version are immediately detected.

Yes, you can use this approach for migrating between different libraries or frameworks by building a breaking change inventory and mapping the API removals and behavior differences to your real callsites before writing tests.