Claude Code Skills

Claude Skills were announced by Anthropic on October 16, 2025.

According to https://simonwillison.net/2025/Oct/16/claude-skills/, Skills are "conceptually extremely simple: a skill is a Markdown file telling the model how to do something, optionally accompanied by extra documents and pre-written scripts that the model can run to help accomplish the tasks."

Key details from the https://www.anthropic.com/news/skills: - Skills are modular, reusable task components - They work across Claude apps, Claude Code, and the API - Available on Pro, Max, Team, and Enterprise plans - Skills can include executable code for reliable task completion - Developers can install skills from the anthropics/skills marketplace

Sources: - https://www.anthropic.com/news/skills - https://simonwillison.net/2025/Oct/16/claude-skills/ - https://www.infoq.com/news/2025/10/anthropic-claude-skills/