What problem does it solve? Inconsistent, vague, or confusing interface copy erodes user trust and makes products harder to use. This Skill provides a systematic set of principles for writing and reviewing user-facing text so buttons, errors, links, and empty states are clear, consistent, and actionable. ## Core Features & Use Cases - Twelve Copy Principles: Covers verb-first button labels, error messages that say how to fix the problem, empty states with a next action, placeholders as format examples, consistent capitalization, and one flow vocabulary. - Structured Review Output: Reports findings in a severity-ranked table (HIGH/MEDIUM/LOW) with before/after quotes, file locations, verification steps, and a Block/Needs changes/Approve verdict. - Use Case: While reviewing a settings screen, the Skill flags a toggle labeled "Don't send read receipts" and rewrites it as "Send read receipts", and replaces an "Oops! Something went wrong." toast with "Unable to save. Check your connection and try again." ## Quick Start Review the interface copy in my checkout flow and report findings with severity, before/after text, and a verdict.