During September 2025, Luis Da Costa focused on improving the documentation for the localstack/localstack-docs repository, specifically clarifying the AWS Lambda URL format when using version aliases. He addressed a grammatical error and enhanced the guidance in lambda.mdx, ensuring that the documentation accurately reflected current usage patterns. Working exclusively in Markdown, Luis applied disciplined version control and change tracking to maintain consistency and accuracy throughout the documentation. His efforts in documentation not only reduced potential developer confusion but also contributed to a more maintainable knowledge base, ultimately improving the developer experience and reducing the likelihood of support queries related to Lambda URLs.