Claude Agent Skills Explained — Transcript

Hi, my name is Otto and in this video we're going to discuss agent skills. Agents today are pretty intelligent, but they don't always have the domain expertise you need for real work and skills help solve this. You can think of skills as organized folders that package expertise that Cloud can automatically invoke when relevant to the task at hand. And most importantly, these skills are portable across cloud code, the API as well as cla.ai. And the way skills work is at startup only the name and description of every installed skill is loaded in the system prompt. This is going to consume about 30 to 50 tokens per skill and make Claude aware of the skill's existence. Then when a user prompt matches a skills description, Claude is going to dynamically load the full skill.md file into context. And finally, if the skill references other files or scripts, they are also progressively loaded and run as needed.

This progressive disclosure allows you to install many different skills to perform complex tasks without bloating your context window. But let's see how skills fit in with the other Claude features. While skills teach Claude how to do specialized tasks, Claude.md files tell Claude about the specific project. Things like your text stack, coding conventions, and repo structure. CloudMD files live alongside your code in the repository. A CloudMD file may say things like we [music] use Nex.js JS and Tailwind. But skills on the other hand are portable expertise that work across any project. So a front-end design skill can teach Claude your typography standards, animation patterns, and layout conventions and [music] activate automatically when building UI components. MCP servers on the other hand provide universal integration, a single protocol that connects Claude to external context sources like GitHub, linear, Postgress, and many many others.

MCP connects to data. Skills teach Claude what to do with it. So an MCP server may give Claude access to your database, but a database query skill can teach Claude your team's query optimization patterns. Finally, sub agents are specialized AI assistants with fixed roles. Each sub agent has its own context window, custom prompt, and specific tool permissions. skills provide portable expertise that any agent can use. So your front-end developer sub agent can use a component pattern skill. Your UI reviewer sub agent on the other hand can use a design system skill, but both can load and use the same accessibility standard skill.

And the best part is these capabilities are designed to work together. Your cloudMD file sets the foundation. MCP [music] servers connect the data. Sub agents specialize in their roles and skills bring the expertise making every piece smarter and more capable. At the end of the day, skills let you package workflows into reusable capabilities like helping onboard new hires to your team's coding standards, ensuring every PR follows a specific security best practices or sharing your data analysis methodology across your team. And that's how skills can help you achieve more with Claude. We encourage you to give them a try and see how they can improve your workflows.