Wouter Leese developed a new Spring Boot 4.0 Flyway Starter Recipe for the openrewrite/rewrite-spring repository, focusing on modularity and autoconfiguration. He implemented dependency preconditions and compatibility logic in Java and Spring Boot, allowing the recipe to automatically include the appropriate starter based on project dependencies. By introducing wildcard-based dependency matching, he ensured compatibility across various Flyway versions and prepared the project for future ecosystem changes. Wouter also migrated and stabilized unit tests, updating recipe sequencing to reflect recent Flyway-core changes. His work demonstrated depth in dependency management and contributed to a more flexible, maintainable migration path for modular starters.