TypeSafe 官方 Claude Code 技能：教 agent 用 Jev 做判断
官方 skill 约 1300 词，让 Claude Code 先读实时文档、把规则留在普通代码、只用 Jev 做判断调用，并给出 13 问合并成一次调用省 12.2 倍成本的实测。
TypeSafe released an official skill that teaches Claude Code to build on Jev. It's one of the best-written skills I've read. About 1,300 words, and nearly every line stops the agent from guessing. It makes Claude Code → read TypeSafe's live docs before writing any code → keep rules, maths and lookups in normal code, and use Jev only for judgment calls → pick the right question type. Choice for one of a set, Noul for yes or no, Score for how much The line that saves the most money is to ask independent questions together, in one call. TypeSafe tested it in their own cookbook. 13 questions in one call came out 12.2x cheaper and 10x faster, with the same answers. Install it in Claude Code claude plugin marketplace add typesafe-ai/skills claude plugin install typesafe@typesafe-ai The skill is free and MIT licensed. You'll need a TypeSafe API key to use Jev.