Unique Return Code (URC) provides structured error handling, symbolic return codes, and deterministic exit-code management for Bash and POSIX shell scripting. The rcGen generator analyzes shell scripts, extracts symbolic error identifiers, and produces consistent mappings for development, automated testing, CI/CD pipelines, and production deployment. URC improves debugging, traceability, and maintainability by separating logical error semantics from numeric shell exit-code constraints while remaining fully compatible with standard Unix environments. ...