During August 2025, Blurrech focused on enhancing the stability and correctness of the PRQL/prql SQL backend by addressing two subtle but impactful bugs. Working primarily in Rust, they improved the compiler’s SQL generation logic, ensuring that redundant CTEs with sorting no longer affected final query outputs and that repeated or derived columns in SELECT and DERIVE statements translated accurately to standard SQL. Their approach included expanding the integration and regression test suites, which strengthened coverage for complex query scenarios. This work improved the reliability and maintainability of the backend, supporting safer future feature development and reducing the risk of regressions.