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break-ui

v0.3.0

Stress-test a piece of UI with realistic worst-case data, report what breaks, and give the fix for each.

CodexClaude Code1 Skill

By Emil KowalskiLicense: MIT1 GitHub starsUpdated 2 weeks ago

Directory evidence

Runtimes
Codex and Claude Code
Parsed components
1 skill or MCP entry
Source updated
Oct 4, 2026
Manifest status
Canonical path parsed

The directory validates manifest shape and source location. It does not execute the plugin or provide a security endorsement. Review the indexing methodology →

Install break-ui for Codex and Claude Code

Installs for the current user
codex plugin marketplace add ShanireZ/Aptinery
codex plugin marketplace upgrade aptinery
codex plugin add break-ui@aptinery

Paste and run these commands in a terminal with Codex. They add and refresh the aptinery catalog, then install this plugin.

Compatibility: the page URL and API slug “break-ui” remain stable.

  • Codex: break-ui@agent-plugin-marketplace → break-ui@aptinery

The installer fetches third-party code from the source repository shown on this page. This directory validates manifest structure and source location, but does not perform a security audit; review the manifest, components, and source before installing.

Get the source manually
git clone https://github.com/ShanireZ/Aptinery

Clone the source repository, then follow its setup instructions to add the plugin to a compatible client. The plugin root is plugins/break-ui/.

Plugin files

plugins/break-ui/
├── .codex-plugin/plugin.json
├── .claude-plugin/plugin.json
└── skills/break-ui/SKILL.md

Included Skills1

break-uiskills/break-ui/SKILL.md

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.

Plugin manifests2

plugins/break-ui/.codex-plugin/plugin.json
{
  "name": "break-ui",
  "version": "0.3.0",
  "description": "Stress-test a piece of UI with realistic worst-case data, report what breaks, and give the fix for each.",
  "author": {
    "name": "Emil Kowalski",
    "url": "https://github.com/emilkowalski"
  },
  "homepage": "https://github.com/ShanireZ/Aptinery",
  "repository": "https://github.com/ShanireZ/Aptinery",
  "license": "MIT",
  "keywords": [
    "agent-skills",
    "ui",
    "testing",
    "stress-test",
    "frontend"
  ],
  "skills": "./skills/",
  "interface": {
    "displayName": "Break UI",
    "shortDescription": "Break UI with worst-case data",
    "longDescription": "Feed a component or screen realistic worst-case data, render it behind a Demo data / Worst case toggle, and report every break with its fix.",
    "developerName": "Emil Kowalski",
    "category": "Design",
    "capabilities": [
      "Interactive",
      "Read",
      "Write"
    ],
    "websiteURL": "https://github.com/ShanireZ/Aptinery",
    "defaultPrompt": [
      "Break this UI with worst-case data.",
      "Stress-test this component and tell me what snaps."
    ],
    "brandColor": "#7C3AED",
    "screenshots": []
  }
}
plugins/break-ui/.claude-plugin/plugin.json
{
  "name": "break-ui",
  "version": "0.3.0",
  "description": "Stress-test a piece of UI with realistic worst-case data, report what breaks, and give the fix for each.",
  "author": {
    "name": "Emil Kowalski",
    "url": "https://github.com/emilkowalski"
  },
  "homepage": "https://github.com/ShanireZ/Aptinery",
  "repository": "https://github.com/ShanireZ/Aptinery",
  "license": "MIT",
  "keywords": [
    "agent-skills",
    "ui",
    "testing",
    "stress-test",
    "frontend"
  ],
  "skills": "./skills/"
}

For maintainers

If you maintain this plugin, link to this source-backed listing from your README so users can review its manifest and indexed components.

[break-ui on Agent Plugins Marketplace](https://pluginsmp.com/plugins/break-ui)