Adam Waller developed a new feature for the NHSDigital/eligibility-signposting-api repository, focusing on enhancing eligibility calculations by introducing ICB suppression rules. He implemented a factory for these rules within the Eligibility Calculator, updated person data builders to incorporate ICB information, and expanded test coverage to handle scenarios where ICB data is absent or null. Using Python and leveraging his skills in API and backend development, Adam’s work reduced the risk of incorrect eligibility status determination. The depth of his contribution is reflected in the comprehensive validation and testing, ensuring robust handling of edge cases in eligibility logic and data processing.