What Anthropic Skills is
Anthropic Skills is a public repository with Claude’s implementation of Agent Skills. A skill is a folder of instructions, scripts, and resources that an agent loads dynamically for a specialized task: documents, spreadsheets, design, web testing, MCP server generation, or internal workflows.
The project matters because it turns prompt setup into portable packages. Instead of repeating a long instruction in every chat, teams can describe a procedure once in `SKILL.md`, add scripts/resources, and reuse it.
What is inside and how it is used
Minimal skill shape
This example shows the project shape and the usual way it is used.
---
name: invoice-review
description: Review invoices against company policy
---
# Invoice Review
Check totals, vendor names, dates, tax fields, and approval notes.The repository includes examples, a specification, and a template. Some document skills for docx/pdf/pptx/xlsx are source-available references rather than ordinary Apache-licensed open source.
Strengths and limits
The limit is that skills need real-environment testing. A good instruction folder helps an agent, but it does not guarantee safety, tool correctness, or policy compliance without checks.