In June 2025, Oliver Heydorn focused on improving documentation quality for the opensearch-project/documentation-website repository. He addressed a critical issue in the Node Statistics API documentation by correcting the 'breakers' key to 'breaker', ensuring the documentation accurately reflected the actual API endpoint. This work, carried out using Markdown and leveraging his documentation skills, enhanced the reliability and clarity of the API reference for developers. Although no new features were introduced during this period, Oliver’s targeted bug fix reduced support queries and improved onboarding by providing precise, up-to-date information, demonstrating careful attention to detail and a commitment to documentation accuracy.