paiza Launches New Course Co-Developed with Python VTuber Sapoo on Using Agent Skills in Claude Code

paiza Inc. (Minato-ku, Tokyo; President and CEO: Yasuto Tachi), operator of the IT engineer career, recruitment, and learning platform paiza, announced that it has begun offering a new course co-developed with Python VTuber Sapoo: “Introduction to Vibe Coding, Claude Code Edition 3: Let’s Try Agent Skills.” The theme of this course is “Skills,” an advanced feature for further automating Claude Code, the AI coding tool announced by Anthropic and currently attracting attention. This course is an applied course designed to help learners use Anthropic’s AI coding tool Claude Code in more practical ways. Participants will learn how to build “Agent Skills,” which can inject project-specific coding rules and business knowledge into Claude, as well as how to use “Plugins” to introduce functions from external tools and marketplaces through the common standard MCP (Model Context Protocol). By using Skills, developers can reflect project-specific coding rules and development workflows in Claude, allowing routine tasks and complex procedures to be carried out with higher reproducibility. By introducing Plugins, learners can also add extensions such as Skills, Agents, and external tool integrations, and learn how to evolve Claude Code to match their own or their team’s development style. The course is aimed at IT engineers who want to use AI not merely as a discussion partner, but as a practical development assistant that understands their development rules and business procedures. The course covers how to create Agent Skills for Claude Code, how to install Plugins, and how to use and apply them. It explains the shift from giving AI instructions through prompts to assigning roles through agentization, introduces ways to extend functionality through MCP by installing Plugins from marketplaces, and includes practical work such as automatically applying coding rules using YAML front matter and using custom Skills to support multilingual Web applications. Course URL: https://paiza.jp/works/vibe-coding-claude-code/trial/vibe-coding-claude-code-trial-3 The lesson structure includes: what Agent Skills are, differences from CLAUDE.md, available environments, writing YAML front matter for coding rules, writing Skills for coding rules, checking whether Skills are enabled, having Claude Code write Skills, explicitly invoking Skills, finding Plugins from a marketplace, building a TODO app without Skills, building a richer TODO app with Skills, improving multilingual support for Web apps with custom Skills, and a summary of Skills and Plugins. The target audience includes people who have mastered the basics of Claude Code and want to pursue more advanced automation, IT engineers who face challenges with AI-generated code quality or deviations from coding standards, people interested in development automation through AI agents, and those who want to streamline repetitive tasks such as multilingual support and refactoring. Python VTuber Sapoo commented that this fourth collaboration course explains, in a beginner-friendly way, how to use Agent Skills in Claude Code. By using Agent Skills instead of ordinary prompt-based instructions, developers no longer need to repeat the same instructions every time, improving development speed and stabilizing the quality of AI output. Since many Skills are already available through marketplaces and communities, users can quickly improve AI output quality simply by selecting and installing Skills that match their goals. The course begins with the basics of what Skills are, then demonstrates how to create Skills, install and use existing Skills from a marketplace, and use custom Skills to make a Web application multilingual. Ryohei Katayama, Chairman of paiza Inc., stated that Agent Skills, the subject of this course, represent a major turning point in the use of generative AI. Until now, humans have issued instructions to generative AI each time, but the industry is entering an era in which people hand “work manuals” in the form of Skills to generative AI and develop it into an autonomous agent. He said he hopes the course will help IT engineers highly automate routine work and create an environment where they can focus on more essential design and problem-solving. paiza will continue to provide opportunities to learn the latest technologies in an enjoyable way. Based on the belief that “it is extraordinary talent that changes the world,” paiza promotes the creation of a unique platform that encourages continuous growth for people and companies under the concept of “develop extraordinary talent.” Through this platform, paiza will continue providing services useful to companies hiring IT talent, educational institutions developing IT talent, and individuals who are active as IT professionals or aspire to become one. paiza is a career, recruitment, and learning platform for IT engineers. Users can demonstrate their skills by taking the online programming test “paiza Skill Check” and use the results for career changes and job hunting. As of March 2026, paiza has approximately 960,000 registered users, and more than 5,000 companies use it for recruitment. The total number of paiza Skill Check test attempts has reached 35.9 million. “paiza Career Change” is a job-change service for IT engineers that visualizes skills and matches engineers with companies based on ability. paiza also operates “paiza New Graduate” for students, “EN:TRY” for inexperienced and young engineers, and “paiza Learning,” a programming learning service directly connected to career change and employment. In addition to job changes by active engineers, many users have also studied through paiza Learning, visualized their skills, and then moved into new jobs or employment.