What problem does it solve? Interface copy often promises actions the product cannot perform, breaks localization tokens, or ignores length limits. This Skill writes and revises labels, errors, empty states, and confirmations based on verified product behavior so the copy stays accurate and actionable. ## Core Features & Use Cases - Behavior-grounded microcopy: Inspects the relevant UI and handlers so button labels and error messages match what the product actually does. - Localization-safe editing: Preserves string keys, interpolation tokens, markup, accessible names, and ICU plural syntax unless a structural change is requested. - Length and tone control: Fits the requested tone, locale, and character budget, measuring final strings and accounting for dynamic values. - Use Case: An upload over {max_mb} MB is rejected with no retry. The Skill replaces "Oops! Something went wrong" with "This file exceeds {max_mb} MB. Choose a smaller file." plus a "Choose file" button, keeping the token exact. ## Quick Start Ask the assistant to rewrite the error message and button label for the file upload flow, keeping the {max_mb} token and matching the actual recovery action.