During July 2025, this developer delivered a header-driven Temporal Validation Suspension toggle for the hmrc/business-details-api repository. The feature enables conditional suspension of temporal validations through the use of a specific request header, allowing for more flexible deployment and targeted testing across downstream integrations. By implementing the toggle at the API boundary, they preserved backward compatibility, ensuring that existing clients and schemas required no changes. The work was carried out using Java and Scala, with a focus on backend development, configuration management, and feature toggles. All changes were traceable to a single commit and associated ticket for auditability and clarity.