16:12
2026-10-06
dev.to
ai-agents
Claude Code made 6 mistakes upgrading a legacy Spring Boot service. None reached a commit.
A developer ran Claude Code through a full upgrade of a legacy Java 11 / Spring Boot 2.7 service to Java 25 / Spring Boot 4.1, a roughly two-hour, $24 session that ended with 47 tests passing. Along t…