Anthropic has published a 32-page guide to building Skills for Claude.
The guide walks through the full lifecycle of building a skill: how to plan your use cases, structure your files, write instructions that actually trigger reliably, test for over- and under-triggering, and distribute to your team or the broader community.
The planning chapter breaks skills into three categories:
document and asset creation
workflow automation
and MCP enhancement - with real examples and code snippets for each.
The patterns chapter covers five common approaches: sequential workflows, multi-MCP coordination, iterative refinement, context-aware tool selection, and domain-specific intelligence. Each comes with an example structure you can adapt which is pretty handy.
Full guide linked below. Worth a read if you use Claude regularly and want to get the most out of Skills: