The new “Skills” support in Agent Builder is a powerful new tool, since it can cover various scenarios and use cases across departments and personas.
For example: If you import the “Agent harness explorer” skill from the open source “CAT Agent Skills” library on GitHub, you instantly have an assistant, who can observe the different harnesses and can also create a nice, HTML visual of its key findings.
Also, since skills are using the same format across platforms (Cowork, Copilot Studio, Claude, Codex, etc.), Agent Builder has suddenly become a powerful platform to handle and run skills across the enterprise.
Skills in Agent Builder is available in the Frontier Preview program today.
- Learn more about skills in Agent Builder here:
Add custom skills to your declarative agent in Agent Builder (preview) | Microsoft Learn - Learn more about skills in Declarative Agents here:
Custom skills in declarative agents (preview) | Microsoft Learn - Learn more about our CAT Agent Skills open-source library here:
CAT Agent Skills - Learn more about the Agent Harness Explorer skill here:
Agent Harness Explorer · CAT Agent Skills - Learn more about why to use skills in Declarative Agents here:
Custom skills in declarative agents (preview) | Microsoft Learn


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