Worked on the hashicorp/packer repository to enhance the stability and clarity of the Packer Validate command by addressing error reporting for unsupported block types in HCL configuration files. Focused on deduplicating error messages so that each unsupported block type would trigger only a single, clear error, reducing confusion for users and reviewers. Expanded test coverage to ensure the fix remained robust and to prevent future regressions in the HCL parsing logic. Utilized Go for CLI development and configuration parsing, applying thorough testing practices to improve the reliability of user-facing error messages and streamline the validation workflow for the project.