Sadiqur Rahman developed optional op-test-sequencer support in the ethpandaops/optimism-package repository, focusing on enhancing Kona supervisor reorganization test workflows. He integrated this feature into the Kurtosis devnet, enabling sequencer-controlled reorg validation while maintaining compatibility with non-sequencer environments. Using Starlark and leveraging DevOps and Infrastructure as Code practices, Sadiqur expanded the test harness and CI coverage to support sequencing-enabled scenarios. This work improved deployment confidence and risk mitigation for Kona supervisor workflows by allowing more reliable and flexible validation in continuous integration. The project emphasized backward compatibility and incremental rollout, reflecting a thoughtful, quality-driven engineering approach.