During March 2026, Darpan contributed to the apache/calcite repository by enhancing the ValuesReduceRule to improve query plan stability and maintainability. He addressed an edge case where filter conditions are irreducible, ensuring tuples are preserved by verifying reduced values as RexLiteral before further evaluation. This approach reduced the risk of unintended data loss in query optimization. Darpan also consolidated related tests into the RelOptRulesTest suite, streamlining regression tracking and supporting future development. His work, primarily in Java and SQL with a focus on unit testing, demonstrated careful attention to both code reliability and the long-term maintainability of the codebase.