【公式直伝】Claude Opus 4.8 のプロンプト・ベストプラクティスを徹底解説！精度を上げる5つの型とは？

In this video, we provide a clear, Japanese explanation of the best practices for prompting in Claude Opus 4.8, as shared by Anthropic's official team. Opus 4.8 has become a "straightforward model" that takes instructions literally, so it's more effective to narrow down the possible outcomes by writing specific instructions using the 5W1H framework rather than relying on ambiguity. I myself have strongly felt that "the more ambiguity you eliminate, the higher the accuracy." The video also includes many immediately applicable tips, such as differentiating the level of effort (XHigh is standard for coding, while Medium or Low can be used to reduce costs), providing few-shots (good and bad examples), structuring with XML tags, and techniques for long-running by externalizing state. We also introduce how to incorporate effort into CLAUDE.md and skill YAML front matter. What kind of prompting techniques do you usually use? Please share them in the comments! ✅AI-Driven Development Research Group (Note Community) ▼Membership Here▼ https://note.com/masa_wunder/membership Original Article https://platform.claude.com/docs/en/b... timestamp: 00:00 Opening - This Episode's Theme and Conclusion 01:06 Opus 4.8 Takes Instructions Literally 02:15 Goal Drift and the Benefits of Specification 03:17 Narrowing the Range of Possible Options with 5W1H 04:17 Five Stages of Effort and How to Use Them Differentiately 06:40 Five Types of Prompts - Specification and Reasons 08:46 Few-Shots / XML Tags / Giving Roles 10:33 Write in Imperative Form Rather Than Negative Form 11:46 Relax Critical and Required Tool Specifications 12:27 Token Efficiency and Over-creation Control 13:20 Autonomous Long Run with State Management and Verification Tools 16:03 Summary - Accuracy Improves as Ambiguity is Eliminated 17:09 Ending - Membership Information --- Thank you for watching! Welcome to [Masao AI In-Depth Explanation Channel]! I, Masao, an engineer involved in AI service development, will thoroughly explain "truly useful ways to use and develop AI" while incorporating actual development sites and know-how. ▼ Subscribe to the channel here ▼ https://www.youtube.com/@ai_masaou?su... x ----- 🎁Free Gifts from Official LINE🎁 We are giving away source code and other materials introduced in videos and articles for "free" to those who register on our official LINE account! By registering, you can get sample code and usage tips that even those with no development experience can try immediately! You'll receive a download site and password immediately! ✨ ▼ Register here https://lin.ee/cJtJ8Y3 ----- ■ Official Website https://masao-ai.web.app/ ■ X (Former Twitter) https://x.com/ai_masaou ■ note (Blog) https://note.com/masa_wunder ■ zenn (Technical Blog) https://zenn.dev/aimasaou ■ Business Inquiries/Contact: Please contact [email protected] ----- ■ Masao's Profile ・14 years of development experience (8th year as a self-employed individual) ・Education: Former Imperial University, research on pixel interpolation ・Developed a service used by over 30 million people and an app with over 4 million downloads through personal development ・Also runs an SNS marketing support business and a web media business ・Specialties: Frontend and mobile apps, image processing ----- ■ Materials Used VOICEVOX: Shikoku Metan, Aoyama Ryusei BGMER: https://bgmer.net/ Sound Effect Lab: https://soundeffect-lab.info/