Anthropic Launches Claude Skills Feature Enabling AI to Load Specialized Abilities for Task Automation

Oct 19, 2025
Simon Willison’s Weblog
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Summary

Anthropic unveils Claude Skills, a groundbreaking feature that enables its AI assistant to dynamically load specialized abilities from simple Markdown files, offering more efficient task automation than existing protocols while requiring only basic coding environments to function.

Key Points

  • Anthropic introduces Claude Skills, a new pattern that allows Claude to load specialized abilities from folders containing instructions, scripts, and resources when relevant to specific tasks
  • Skills are conceptually simple Markdown files with optional YAML metadata and executable scripts that tell the model how to perform tasks, requiring only a coding environment to function
  • Skills offer significant advantages over Model Context Protocol (MCP) by being more token-efficient, easier to share, and simpler to implement while enabling powerful automation capabilities

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