I Built 10 AI Agent Skills and Shrank 300 Lines of Boilerplate to 30

Over the past six months, I've built about 10 Agent Skills — the kind of scripts that LLM-powered coding agents invoke to get real work done. By the third one, I noticed something embarrassing: I'd copy-pasted three different HTTP wrappers across three different skills. Cookie auth in one. Bearer token in another. Network error handling in a third. Three copies of http.ts, each slightly different. If the auth method ever changed, I'd have to fix the same logic in three places. And HTTP was jus...