Worked on enhancing the reliability of chat agents in the openclaw/openclaw repository by addressing a persistent issue with the typing indicator lifecycle. Used TypeScript to ensure that typing indicators were properly cleaned up by invoking markRunComplete and markDispatchIdle within a finally block, preventing indicators from remaining stuck across channels. Focused on backend development and debugging, comprehensive tests were added to cover edge cases such as NO_REPLY, empty payloads, agent errors, and successful dispatch scenarios. This approach improved chat user experience stability and reduced support overhead, demonstrating a methodical, test-driven workflow with an emphasis on robust fault tolerance.