java-to-react-modernizer

Use this skill to modernize, port, rewrite, or migrate a Java application (Spring/JSP/JSF/Stripes/servlets/Java services) to JavaScript with React. Trigger even when the user says "rewrite our backend UI in React", "get off Java", "modernize the legacy app", "port these controllers to a JS frontend", or names individual Java classes/JSPs to convert. This skill makes build/test/lint/type verification AND a multi-lens security review MANDATORY GATES on every migrated module -- for banking/regulated callers these gates are first-class, not optional. It plans migration waves, fans out per-module translation to cost-bound worker agents, proves equivalence with deterministic tools, runs a security panel, and gates the final write behind a human checkpoint. Do NOT use for greenfield React work with no Java source, for Java-to-Java upgrades (e.g. Spring Boot 2->3), or for deployment.