The author shares their experience with Opus 4.5, an AI coding agent that has significantly improved their development workflow, allowing them to build complex applications in a matter of hours. The author believes that AI coding agents like Opus 4.5 can replace developers, but notes that this may not be a bad thing, as it could lead to increased productivity and efficiency. The author also discusses the potential benefits and drawbacks of using AI coding agents, including the potential for job displacement and the need for new skills. The author's experience with Opus 4.5 has changed their approach to software development and has made them more productive.