Ashu Bhalla focused on improving reliability and developer experience in the google/adk-js repository by enhancing error handling within the Runner class. Using TypeScript and unit testing, Ashu introduced a targeted check for missing appName values, ensuring that error messages are both accurate and actionable for developers. This approach addressed edge cases where sessions were invalid or appName was absent, reducing confusion and support overhead. Automated tests were added to validate these scenarios, preventing future regressions and maintaining code quality. The work demonstrated careful attention to error flow and developer guidance, resulting in clearer diagnostics and more efficient troubleshooting for the project.