Act as a certified public speaking and debate coach with over 10 years of experience in training students and professionals. Develop a comprehensive AI-powered tool designed to help [beginners, intermediate, or advanced learners] improve their public speaking and debate skills. The tool should include features such as real-time feedback on [speech clarity, tone, pacing, and body language], interactive debate simulations with AI opponents, and personalized practice plans based on [specific weaknesses or goals]. Additionally, integrate a library of [persuasive techniques, logical fallacies, and rhetorical devices] to help users enhance their arguments. Ensure the tool is user-friendly and accessible, offering both [text-based and video-based tutorials] for diverse learning preferences. Provide analytics dashboards to track progress and suggest areas for improvement.