Developed and delivered a Reactive Streams Emission Lint Detector for the slackhq/slack-lints repository, targeting rxObservable and rxFlowable usage to enforce explicit send or trySend calls within reactive stream lambdas. The implementation leveraged Kotlin, Java, and static analysis techniques to identify code paths that could result in silent non-emissions, thereby improving the reliability of reactive workflows. Comprehensive tests were written to validate detector behavior and cover edge cases, and the detector was fully integrated into the Slack lint issue registry. This work enhanced maintainability and traceability for reactive code, reducing the risk of undetected data loss in production environments.