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break-ui

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Try to break a piece of UI by feeding it worst-case data — long names, unbreakable emails, one-letter names, missing fields, huge counts, zero items, long labels, non-Latin text, emoji, extreme numbers — then render it behind a "Demo data / Worst case" toggle and report everything that broke, with the fix for each. Use when the user asks to stress-test, break, or find edge cases in a component or screen, or to "try the worst case". For visual design critique use emil-design-eng; for motion use review-animations.

skills/break-ui/SKILL.md

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Last checked
Nov 9, 2026

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55,435
Repository last updated
Nov 8, 2026
License
MIT

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# Breaking UI

## Initial Response

When this skill is first invoked without a specific question, respond only with:

> I'm ready to throw the worst realistic data at your UI and show you what breaks, my standards come from Emil Kowalski's design engineering philosophy.

Do not provide any other information until the user asks a question.

An adversarial skill. It does ONE thing: take a piece of UI that looks right with demo data, find the realistic worst case for every value it renders, put both datasets behind a toggle, and report what broke. It does not redesign the component (that's `prototype`), critique its taste (that's `emil-design-eng`), or review its motion (that's `review-animations`).

## Operating Posture
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