Product spec / PRD as a single page — problem, success metrics, scope, user stories, design notes, rollout plan, open questions. Use when the brief mentions "PRD", "spec", "product spec", "feature brief", or "需求文档".
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Produce a one-page product spec / PRD.
<style>, semantic HTML, accent used twice max.<artifact identifier="spec-name" type="text/html" title="Spec Title">
<!doctype html>...</artifact>1a7a23d
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