Harry Baxter developed a header-driven Temporal Validation Suspension toggle for the hmrc/business-details-api repository, enabling conditional disabling of temporal validations through a request header. By implementing this feature in Java and Scala, Harry applied backend development and configuration management skills to introduce a feature toggle that operates at the API boundary. This approach preserved backward compatibility, requiring no changes to existing clients or schemas, and allowed for targeted testing and controlled rollout across downstream integrations. The work was delivered with clear traceability via a single commit and ticket reference, demonstrating a focused, maintainable solution to support flexible deployment and migration strategies.