Gray Choi developed model-parameterization capabilities for Claude code-action workflows, focusing on configurability and reproducibility across the anthropics/claude-code-action and cockroachdb/claude-code-action repositories. Using Node.js and TypeScript, Gray implemented parameter propagation to the Claude CLI, enabling per-run model selection and streamlined parameter passing in production pipelines. The approach harmonized model selection logic across both repositories, reducing manual configuration and supporting more efficient experimentation. By introducing a model field and handling CLI arguments programmatically, Gray’s work improved workflow consistency and accelerated deployment of model-parameterized automation, demonstrating depth in full stack development and attention to cross-repository alignment for maintainable engineering solutions.