【全員必見】ハーネスエンジニアリングとは？AIエージェントの必須知識を徹底解説

This video provides a thorough explanation of the currently trending topic, "harness engineering." Harness engineering is a technique for designing and optimizing everything in an AI agent except the model itself—context management, tool control, guardrails, monitoring, and feedback loops. This video summarizes the key points you should know as an introduction, covering the evolution from prompt engineering to context engineering to harness engineering, practical applications in Claude Code (Hooks, skills, sub-agents, memory systems), and even design patterns for planners, generators, and evaluators. ✅AI-Driven Development Research Group (Note Community) ▼Membership here▼ https://note.com/masa_wunder/membership This is the article: https://note.com/masa_wunder/n/n4aca7... 00:00 Opening 01:14 What is a harness? (Model + Harness = AI Agent) 01:54 Five Roles of a Harness (Context, Tools, Guardrails, Monitoring, Feedback) 03:46 Differences Between External and Internal Harnesses 05:40 Why Harness Design Skills are Important (Codex Team's Achievements) 07:04 Problems Solved by Harnesses (Context Optimization, Quality Improvement, State Persistence, Safety) 08:16 Deterministic vs. Non-Deterministic Control Concepts 09:53 Relationship with Context Engineering 12:28 Deterministic Control by Hooks 14:16 Memory System and Skill/Sub-Agent Design 18:34 Practical Application: Generator and Evaluator Separation Patterns 21:03 Three-Part Pattern: Planner, Generator, and Evaluator 24:14 Harness Anti-Patterns (Over-Control, Excessive CLAUDE.MD Writing) 25:47 Getting Started with Harness Design (5 Steps) 29:31 Summary & Closing --- 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 work and know-how. ▼ Subscribe to the channel here ▼ https://www.youtube.com/@ai_masaou?su... ----- 🎁Free Gift 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/