Migration Guides
This section is for practical upgrade work: planning, checking risks, making code changes, and validating the application after the version bump.
Current Focus
| Guide | Use it when |
|---|---|
| Spring Boot 3 to Spring Boot 4 | You have a Spring Boot 3 application and want a guided path to Boot 4. |
| Spring Security 7 review | Your app uses Spring Security and you need the highest-risk auth changes before upgrading. |
How To Use These Guides
- Read the platform baseline and common failure map first.
- Upgrade in phases, not as one giant change.
- Keep the application runnable after each phase.
- Use the pull request checklist as review criteria.
- Compare every important decision against the official Spring migration notes.
The goal is not only to make the build green. The goal is to understand what changed so the upgraded application is easier to operate, test, and maintain.