I Copy-Pasted the Same Prompt 47 Times Before Noticing Claude Code Has Skills (opens in new tab)

I copy-pasted the same review prompt 47 times last month. PRs, internal scripts, the README of a side project I was supposed to ship in 2024. The prompt was fine. I was the problem. Claude Code has had a feature for this since late 2025, and I'd been ignoring it because the docs page had a name I didn't understand: Skills. I finally caved when a teammate asked, "what's the difference between your custom commands and Skills?" and I realized I had no idea. So I read the docs, ported my entire ....