Impeccable: a command toolkit to improve the quality of AI assistant front-end design

Impeccable is an open source AI front-end design language and skills library, designed to help AI programming assistants (such as Claude Code, Cursor, etc.) to generate a higher quality, more aesthetic UI design, to avoid the uniform “AI plastic sense” interface. The project extends Anthropic's frontend-design with a skills library containing 7 domain-specific reference files, 20 control commands, and a well-organized guide to anti-patterns. With these resources, developers can explicitly guide AI in writing front-end code to avoid common design missteps (e.g., misuse of card nesting, use of pure gray and black, lack of visual rhythm, etc.), and support the use of simple slash commands (e.g., /audit, /normalize, /critique, /polish, etc.) to automate the review of AI-generated UI, normalization alignment, experience evaluation and detail polishing, thus significantly improving the performance of AI in the field of front-end UI/UX design.

Function List

• Provides 20 AI control commands: Includes/audit(Review UI quality and generate reports),/normalize(Alignment design system with normalized spacing),/critique(Conducting UX interaction reviews),/polish(final visual polish before going live), etc., covering the whole process of front-end design.
• Built-in 7 domain-specific reference documents: Expanding AI's knowledge in different professional dimensions such as typography, color, spacing, animation, component design, etc., so that AI has a deeper front-end design literacy.
• Anti-Shoddy Design Anti-Patterns Library (Anti-patterns): Clearly communicate to the AI “what not to do” when designing, e.g. don't use solid black/grey (should be tinted), don't abuse card nesting, don't use default or overused fonts, etc.
• Supports integration of multiple AI tools: Perfectly compatible with Anthropic's newly released Claude Code terminal tool, as well as providing ready-to-use configuration files and Prompt packages for Cursor, Windsurf and other AI programming editors.
• Comparison of before and after results: Provides real UI design comparison cases before and after using Impeccable instruction set, which is convenient for developers to visually evaluate its improvement effect on AI-generated code.

Using Help

Welcome to Impeccable, a programmer's assistant specifically designed to enhance AI programming assistants such as Claude Code, Cursor This is an open source instruction set and skill base for front-end interface (UI/UX) design capabilities. This help document will guide you in detail on how to install, how to operate the featured commands, and how to efficiently work with AI in real-world development to ensure that you can get started immediately after reading it!

I. How to install Impeccable

Depending on the AI tools you use every day, Impeccable offers a variety of installation and integration options:

1. Installation in Claude Code (recommended)
If you are using the Anthropic The official terminal AI programming assistant, Claude Code, installing Impeccable is as simple as running a command in the terminal:

• Step one: Open your terminal.
• Step two: Make sure you have globally installed and logged into Claude Code.
• Step Three: Copy and run the following command:
  claude install-skill https://github.com/pbakaus/impeccable
• Step Four: Once installed, Claude Code will automatically load Impeccable's library of 20 specialized commands and anti-patterns, which you can use in your conversations at any time.

2. Installation in the Cursor Editor
If you prefer to use Cursor, the AI-native code editor, you can inject Impeccable's capabilities into your project by copying the configuration file:

• Step one: Visit Impeccable's GitHub repository or the official website to download the latest project tarball and extract it.
• Step two: Locate the unzipped folder of the dist/cursor/.cursor Catalog.
• Step Three: Copy all configuration files in this directory directly to the root directory of the local project you are developing in the .cursor folder.
• Step Four: Restarting your Cursor editor or refreshing the context will cause Cursor to adhere to Impeccable's design specifications by default when generating code for this project.

3. use in other AI tools (e.g., Claude on the Web, ChatGPT, v0, etc.)
If you are not using the local client described above, you can still enjoy Impeccable's design guidance by copying the Prompt manually:

• Step one: Open Impeccable's open source repository and go to the folder where the rules or prompts are stored (such as the dist 或 src）。
• Step two: The design principles, anti-pattern rules, and operating instruction descriptions organized therein are copied in their entirety.
• Step Three: Before asking the AI a question, feed them to the AI as a context (System Prompt) or send them directly as the first message of the conversation and tell it, “In the next front-end development, please strictly follow these design specifications.”

II. Core featured directives and specific operational processes

At the heart of Impeccable are 20 carefully crafted slash (/) commands. Mastering these commands gives you absolute control over the quality of the UI generated by your AI. Here are a few of the most common and core directives in action:

1. /audit -- Automated UI quality review

• Feature Description: Runs a quality check and outputs a detailed UI review report. This command will only point out design issues with the current UI interface.No direct code changes。
• Applicable Scenarios: Before you let the AI drastically change the code, understand what's not compliant on the current page.
• Example of operation:
  • /audit blog(UI quality review of blog syndication pages and post detail pages)
  • /audit dashboard(Checking the standardization of the various components of the console dashboard)

2. /normalize -- Alignment of normative and design systems

• Feature Description: Align code with standard UI design systems. It will help you fix messy spacing, irregular font sizes, and replace fragmented color values with uniform design Token.
• Applicable Scenarios: Upon completion of the /audit Use it after the review, or if you feel the AI-generated interface is a bit cluttered and unaligned.
• Example of operation:
  • /normalize blog(Application Design) Token (and fix the spacing on the blog page)
  • /normalize buttons(Standardize the style and size of all buttons in a project)

3. /critique -- In-depth UX (user experience) review

• Feature Description: Provides high level feedback on interaction and user experience design. Instead of focusing on the details of the code, it provides feedback from the perspective of usability, ease of use, and gives AI suggestions.
• Applicable Scenarios: When you're looking for feedback and inspiration on UI design, rather than straight technical fixes.
• Example of operation:
  • /critique landing page(Review the overall user experience and conversion dynamics of the landing page)
  • /critique onboarding(Checking the new user orientation process for cognitive load)

4. /polish -- Visual refinement

• Feature Description: Putting the finishing touches on the UI. Fix minor pixel imperfections, adjust contrast, and optimize white space to make pages look more polished and professional.
• Applicable Scenarios: The final step before deploying the code to the production environment and officially releasing it.
• Example of operation:
  • /polish feature modal(Meticulous visual optimization of pop-up components for new features before going live)

III. Advanced: how to combine instructions to complete complex workflows

Impeccable is also powerful in that you can combine multiple commands and let the AI optimize your project in one fell swoop, following a specific process.

• Full process automation optimization: If you want to completely refurbish a module, you can enter:
  /audit /normalize /polish blog
  Execution Logic: The AI will start with a thorough review of the blog module, followed by applying specifications to fix the cluttered design, and finally a high-precision visual polish before output.
• Experience and robustness are both improved: If you want to optimize a core process (e.g. payment), you can enter:
  /critique /harden checkout
  Execution Logic: The AI will first optimize the interaction of the payment process from a UX perspective and then use the /harden The directive adds error handling logic for various edge cases to the page, ensuring that the interface not only looks good, but is stable.

Anti-Pattern Principles for Keeping AI Away from “Bad Design”

In addition to active commands, Impeccable also has a rich built-in library of “Anti-patterns”, which is also its secret weapon that allows the AI to write more advanced UI. You don't need to mention it too often when working with AI on a day-to-day basis, as AI will implicitly adhere to the following principles:

1. Don't abuse pointless card nesting: Impeccable puts a strict stop to AI's bad habit of putting a card border around every element.
2. Reject pure black and pure gray: Realistic high level design rarely uses solid black or gray, often with a hint of warm or cool tones. impeccable forces the AI to use dark colors with a hint of tint to enhance the texture of the interface.
3. Disable the over proliferation of neutral fonts: While AI by default prefers to use the system's own fonts or universal fonts such as Arial, Inter, etc., Impeccable advocates the inclusion of more characterful fonts in the typography depending on the tone of the page.

With these detailed tutorials and tips, you are now fully familiar with Impeccable. Call on the AI assistants in your projects and experience design-inspired front-end development!

application scenario

1. Corporate website and landing page development
   Use Impeccable's/critique和/polishThe instruction allows the AI assistant to say goodbye to the uniform AI template style and generate the official website of the enterprise with advanced texture, good typography and dynamic effects, which greatly improves the conversion rate.
2. Complex Management Backend and Dashboard Refactoring
   When reconfiguring a large and confusing admin backend, it is possible to do so through the/audit和/normalizeCommand combinations, the AI assistant can automatically identify design inconsistencies and align the design system with one click to unify the global spacing and color tone.
3. Interaction-intensive product prototyping
   For products with a large number of forms, pop-ups, and action links, utilize Impeccable's anti-nesting card rules and/hardenRobustness directives, AI assistants can write high-quality interaction code that is well-structured, nerd-proof, and error-proof.

QA

1. Does Impeccable only work with Claude Code?
   It isn't. While it has built-in support for direct installation of Claude Code, it also has specialized profiles for AI-native editors like Cursor, Windsurf, etc., and you can even manually extract the cue words in them for use in any large language model.
2. Why does the UI I generate using AI always look like the typical “AI plastic style”?
   Because the big models are trained from massive amounts of code across the web, the default will be to favor the use of the most modest templates (e.g., Inter fonts, purple gradients, multi-layer card nesting, etc.) Impeccable is designed to address this pain point by correcting for this preference of the AI with explicit antipatterns and commands.
3. Will using Impeccable change my existing project UI framework?
   No. Impeccable is a set of design language logic and directives that is not dependent on a specific front-end framework. Whether you're using React, Vue, Tailwind CSS or pure CSS, it can improve the quality of the code produced by guiding the AI mindset.