Agent Skills are just folders of Markdown — and after a year of MCP hype, that's the point
The most useful upgrade to my agent workflow lately is embarrassingly low-tech: a folder with a SKILL.md in it. Anthropic's Skills (now an open standard) use progressive disclosure to load the right instructions only when relevant. They're the honest counterweight to MCP: half the time you don't need a live tool, you need the paragraph the agent was missing — versioned in git, no daemon. Plus the supply-chain caveat nobody screenshots.