springboot-migration
Spring Boot Migration
Purpose
Use this skill for phased upgrade work on existing Spring Boot applications. This skill adds value through the migration scanner, the Boot 4 / Modulith 2 / Testcontainers 2 reference guides, and a strict migration order that avoids mixing too many changes at once.
Critical rules
- Never migrate blindly. Scan the codebase first.
- Never apply every migration at once. Follow phased upgrades.
- Treat Java 25, Spring Boot 4, Spring Modulith 2, and Testcontainers 2 as the intended target stack for this skill unless the user asks for a narrower target.
- Verify after each phase and stop when failures appear.
Workflow
Step 1: Scan the project
Use the migration scanner before planning or editing:
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