Worked on the moltbot/moltbot repository to enhance billing error handling within the Agent Runner component. Developed a proactive mechanism in TypeScript that checks for billing errors before rate-limit messages are triggered, ensuring users receive clearer guidance and reducing confusion between billing and rate-limit issues. Focused on backend development and robust error handling, the solution aimed to streamline the billing workflow and support faster issue resolution in production environments. Collaborated closely with peers through co-authored commits and thorough code reviews, following Git best practices. Emphasized testing to maintain code quality and reliability throughout the deployment of this targeted feature improvement.