Learn state-of-the-art prompt engineering techniques in this 56-minute conference talk delivered by Karina Nguyen, who leads engineering on Anthropic's Claude Instant. Discover proven principles and best practices for crafting effective prompts based on real-world experience developing one of the leading AI language models. Gain insights into advanced prompt engineering strategies, optimization techniques, and practical approaches that have been tested and refined through hands-on work with Claude's development. Explore how to structure prompts for maximum effectiveness, understand the underlying principles that make prompts work well, and learn from the engineering perspective of someone directly involved in building cutting-edge AI systems.