Review Summary

Your implementation successfully fulfills all core requirements for the case transformer server. The code correctly uses the http module, implements URL parsing with URLSearchParams, validates both text and case parameters with the exact error messages specified, invokes the convertToCase business logic, and returns properly formatted JSON responses with all required fields. All five cases (SNAKE, KEBAB, CAMEL, PASCAL, UPPER) are supported, and the createServer function is properly exported. While the status text relies on Node.js defaults rather than being explicitly set, these defaults match the specification (200="OK", 400="Bad Request"), so no functional issues exist. No test failures were reported. Great work on implementing this server correctly!

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