GitHub Copilot, initially launched in 2021 as an autocomplete tool, has evolved by 2025 to include two distinct AI-powered features: Agent mode and Coding agent. Agent mode functions as a real-time collaborator within IDEs like VS Code, JetBrains, and others, helping developers by iterating on code, running tests, and fixing errors instantly. In contrast, Coding agent operates asynchronously in the cloud via GitHub Actions, tackling assigned issues by autonomously writing and testing code before submitting pull requests for review. While both features are designed to enhance developer productivity, they serve different parts of the workflow, with Agent mode providing real-time support and Coding agent managing background tasks. These tools, which consume Copilot premium requests and Actions minutes, are best used in tandem to streamline the development process, allowing developers to focus on more creative and complex tasks while automating routine and repetitive ones. The integration of these AI agents emphasizes the importance of maintaining human oversight for tasks like architecture decisions and security reviews, ultimately aiming to improve code quality and development efficiency.