Worked on the grafana/k6-DefinitelyTyped repository to enhance type safety for AWS Lambda integrations by correcting field casing in the SNSMessage type definitions. Addressed a bug where SigningCertUrl and UnsubscribeUrl did not match the expected AWS SNS field names, updating them to SigningCertURL and UnsubscribeURL to prevent downstream data processing errors. Utilized TypeScript and type definition expertise to ensure compatibility with existing AWS Lambda workflows, validating changes against repository standards. This targeted fix reduced the risk of runtime errors in downstream tooling and integrations, supporting smoother adoption for projects relying on accurate AWS SNS message typings in TypeScript environments.