Zach Howard contributed to the ethpandaops/optimism-package by reintroducing the op-proposer component and enhancing the proposer-launcher. He implemented an l2_num parameter in the L2 launcher, enabling more precise indexing into deployment state for chain-specific addresses. His work ensured that proposer parameters are now standardized with the batcher and updated the proposer to leverage the dispute game factory, laying the foundation for future dispute-resolution workflows. Using Starlark and applying backend development and DevOps skills, Zach’s contributions focused on improving deployment flexibility and coordination within the package, demonstrating a thoughtful approach to maintainability and future extensibility in the codebase.