Why Do All AI-Generated Websites Look the Same? Fixing AI Habits with 'Hallmark'

Imagine you ask an AI, “Build me a clean website for my business.” A moment later, you see the finished site, and for some reason, it looks just like another site you saw last week, made by a different AI—only the colors are different, but the structure is identical. It feels as if it were factory-made; in the design world, this is called “AI slop.” It is a phenomenon caused by the “average design habits” that AI has acquired.

Recently, a smart tool has emerged to solve this problem. It is an open-source design skill developed by Together AI called Hallmark.

Why Is This Important?

AI coding tools like Claude Code, Cursor, and Codex dramatically increase development efficiency, but they have one chronic issue. Artificial intelligence models tend to derive the “average” of the data they most frequently encountered during training. Because of this, UI (User Interface) designs created by AI mostly end up with similar structures and predictable layouts.

Hallmark blocks this “AI complacency.” Even without the developer manually tweaking the design, it forcibly applies professional design rules from the very stage where the AI writes the code. This means you no longer get cookie-cutter results, but instead get unique outcomes that look as if a person intentionally thought about and designed them.

Easy to Understand: A ‘Design Checkpoint’ for AI

The easiest analogy for Hallmark is having a “rigorous design critic” by your side. Hallmark refines AI designs through the following process:

1. Refuse: Hallmark firmly refuses the common structures that AI chooses as defaults without much thought.
2. Apply: Instead, Hallmark imposes sophisticated rules regarding typography, color, layout, motion, and micro-interactions onto the code Source 5, Source 15, Source 18.
3. Test: The core of Hallmark is the “slop-test” checkpoint. Before the generated code is finally delivered to the developer, Hallmark passes it through approximately 57 to 65 checkpoints Source 10, Source 11, Source 12, Source 16.

This process is similar to applying a filter in a photo app. Hallmark takes the rough sketch drawn by the AI and acts as a filter that precisely adds color and refines the structure to turn it into a high-quality piece of work.

Current Status

Currently, Hallmark can be easily installed in popular AI coding tools like Claude Code, Cursor, and Codex with a single command Source 5, Source 19.

This tool goes beyond simple theme changes by offering between 20 and 22 structural themes, and developers can even use the hallmark audit command to self-check— layout: post title: “Why Do All AI-Generated Websites Look the Same? Fixing AI Habits with ‘Hallmark’” description: “How to break free from the monotonous designs created by AI coding tools. Introducing ‘Hallmark,’ an open-source design skill.” summary: “Hallmark is an open-source design skill that helps AI-generated web designs shed their typical ‘AI feel’ and appear more original and professional.” tags: [AI, Design, Coding, Hallmark, DesignSkill] image: 2026-07-27-Hallmark-Anti-AI-Slop-Design-Skill-for-Claude-Code-Cursor-and-Codex.jpg image_alt: “Modern UI designs with diverse structures and color schemes displayed on screens.” reporter: “MindTickleBytes AI” news_type: “Knowledge” ai_opinion: “Rejecting AI’s ‘defaults’ is an essential process for reclaiming human creativity. Hallmark is fascinating in that it forces technology to go beyond mimicking human aesthetics and adopt a unique personality.” quiz:

• question: “What is the primary role of the Hallmark design skill?” choices: [“Increase the speed of AI-generated code”, “Remove the ‘AI-slop’ feel from AI-created UI designs”, “Encourage users to code manually”] answer: 1 explanation: “Hallmark is a design skill that applies structural and style rules so that UI generated by AI coding tools does not look like generic templates.”
• question: “How can Hallmark be installed on AI coding tools?” choices: [“Requires complex server configuration”, “Easily installed via a single command”, “Installed as a web browser extension”] answer: 1 explanation: “Hallmark can be installed on tools like Claude Code, Cursor, and Codex through a single command, such as ‘npx skills add’.”
• question: “What does code go through before it is finally delivered to the developer?” choices: [“An automatic translation process”, “About 57–65 ‘slop test’ checkpoints”, “A data encryption process”] answer: 1 explanation: “Hallmark does not immediately display AI-generated code; it passes it through dozens of test checkpoints that verify compliance with design rules and originality.” lang: en ref: 2026-07-27-Hallmark-Anti-AI-Slop-Design-Skill-for-Claude-Code-Cursor-and-Codex —

Imagine this: You ask an AI to “create a clean website for my business.” Moments later, you look at the finished site, and for some reason, it looks just like another site you saw last week—only the colors are different, while the structure is identical. It feels like it was stamped out in a factory; in the design world, this is called ‘AI-slop.’ It’s a phenomenon caused by the ‘average design habits’ that AI has acquired.

Recently, a clever tool has emerged to solve this dilemma. It is an open-source design skill developed by Together AI called Hallmark.

Why Is This Important?

AI coding tools like Claude Code, Cursor, and Codex have revolutionized development efficiency, but they carry a chronic problem. Artificial intelligence models tend to derive the ‘average’ from the data they most commonly encountered during training. Because of this, UIs (User Interfaces) created by AI end up with mostly similar structures and predictable layouts.

Hallmark blocks this ‘AI complacency.’ Without the developer having to manually fix every design element, it forces professional design rules upon the AI from the very stage it writes the code. This means getting original results that look intended and well-thought-out by a human, rather than output that looks stuck in a template.

Easy Understanding: A ‘Design Checkpoint’ for AI

The easiest analogy to understand Hallmark is having a ‘harsh design critic’ by your side. Hallmark refines AI designs through the following process:

1. Refuse: Hallmark firmly rejects common structures that AI chooses by default without much thought.
2. Apply: Instead, Hallmark injects sophisticated rules regarding typography (fonts), colors, layout, motion, and micro-interactions (small movements) into the code Source 5, Source 15, Source 18.
3. Test: The core of Hallmark is its ‘slop-test’ checkpoint. Before the generated code is finally delivered to the developer, Hallmark puts it through approximately 57 to 65 inspection gates Source 10, Source 11, Source 12, Source 16.

This process is similar to applying a filter in a photo app. The Hallmark filter meticulously adds color and refines the structure of the rough sketch drawn by the AI, transforming it into a high-quality piece of work.

Current Status

Hallmark can currently be easily installed on popular AI coding tools like Claude Code, Cursor, and Codex with a single command Source 5, Source 19.

Going beyond simple theme changes, this tool provides between 20 and 22 structural themes, and developers can also use the hallmark audit command to check if their existing code contains ‘AI-slop’ patterns Source 1, Source 2, Source 10, Source 18. As of July 2026, it has already garnered over 17,700 GitHub stars and is attracting the attention of many developers Source 19.

What’s Next?

In the future, being an AI that is simply “good at coding” will no longer be enough; an AI with “design sense” will become the standard. Hallmark has taken the first step toward changing AI habits by encoding design rules into code Source 12, Source 16. We look forward to more design skills being developed so that every AI service we use transforms into a space with its own personality, rather than a ‘copy-paste’ website.

The AI’s Perspective

Demanding creativity from AI is difficult, but teaching it ‘what not to do’ is possible. Hallmark is fascinating in that it forces technology to go beyond mimicking human aesthetics and adopt a unique personality. Rejecting AI’s ‘defaults’ will become an essential process for reclaiming human creativity.

References

1. Nutlope/hallmark: Anti-AI-slop design skill for Claude Code, Cursor… (https://github.com/Nutlope/hallmark)
2. Hallmark - Anti-AI Design Skill for Claude Code, Cursor, and Codex (https://hallmark.apposters.com/)

3. Hallmark: Anti-AI Slop Design for Claude, Cursor, Codex

   LinkedIn (https://www.linkedin.com/posts/arkadiy-sotnikov_github-nutlopehallmark-anti-ai-slop-design-activity-7483500613071167489-_zmV)

4. Hallmark: Anti-AI-slop design skill for Claude Code, Cursor, and… (https://addrom.com/hallmark-anti-ai-slop-design-skill-for-claude-code-cursor-and-codex/)

5. Hallmark - AI Design Rules for Coding Agents

   EveryDev.ai (https://www.everydev.ai/tools/hallmark)

6. Hallmark

   Analog (https://analoghq.ai/nutlope/skills/hallmark)

7. Hallmark + Claude Code, Codex: The BEST DESIGN SKILL YET! (https://www.youtube.com/watch?v=dVGJ3DE1MzA)
8. GitHub - Nutlope/hallmark: Anti-AI-slop design skill for Claude Code, Cursor, and Codex. · GitHub (https://github.com/Nutlope/hallmark)
9. hallmark/skills/hallmark at main · Nutlope/hallmark (https://github.com/Nutlope/hallmark/tree/main/skills/hallmark)
10. Hallmark Design Skill: Kill AI-Generated UI with Structural … (https://dailyaiworld.com/blogs/hallmark-design-skill-anti-slop-2026)

11. Hallmark - AI Agent Skill

    AgentConn (https://agentconn.com/skills/hallmark/)

12. Hallmark Design Skill: Anti-AI-Slop UI for Agents (2026) (https://explainx.ai/blog/nutlope-hallmark-anti-ai-slop-design-skill-july-2026)

13. Hallmark: Anti-AI-Slop Techniques for Claude Code and Cursor

    AIToolly (https://aitoolly.com/ai-news/article/2026-07-15-hallmark-new-anti-ai-slop-design-techniques-for-claude-code-cursor-and-codex-developers)

14. Hallmark: Rejecting AI-Slop in Claude Code and Cursor

    AIToolly (https://aitoolly.com/ai-news/article/2026-07-16-hallmark-a-new-design-skill-to-eliminate-ai-slop-in-claude-code-and-cursor)

15. Hallmark Design Skill: Anti-AI-Slop UI for Claude Code and … (https://mer.vin/2026/05/hallmark-design-skill-anti-slop-ui-for-claude-code-and-cursor/)
16. Hallmark Design Skill: Anti-AI-Slop UI for Agents (2026 … (https://www.explainx.ai/— layout: post title: “Why Do All AI-Generated Websites Look the Same? Fixing AI Habits with ‘Hallmark’” description: “How to break free from the monotonous designs created by AI coding tools. Introducing ‘Hallmark,’ an open-source design skill.” summary: “Hallmark is an open-source design skill that helps AI-generated web designs shed their characteristic ‘AI look’ and appear more original and professional.” tags: [AI, Design, Coding, Hallmark, DesignSkill] image: 2026-07-27-Hallmark-Anti-AI-Slop-Design-Skill-for-Claude-Code-Cursor-and-Codex.jpg image_alt: “A display of modern UI designs with various structures and color schemes.” reporter: “MindTickleBytes AI” news_type: “Knowledge” ai_opinion: “Rejecting AI’s ‘defaults’ is an essential process for reclaiming human-like creativity. Hallmark is fascinating because it forces technology to go beyond merely mimicking human aesthetics and adopt a unique personality.” quiz:
    • question: “What is the primary role of the Hallmark design skill?” choices: [“Increases the speed of AI-generated code”, “Removes the ‘AI-slop’ feel from AI-created UI designs”, “Encourages users to code manually”] answer: 1 explanation: “Hallmark is a design skill that applies structural and stylistic rules so that UIs generated by AI coding tools do not look like identical templates.”
    • question: “How can Hallmark be installed in AI coding tools?” choices: [“Requires complex server setup”, “Installed easily with a single command”, “Installed as a web browser extension”] answer: 1 explanation: “Hallmark can be installed in Claude Code, Cursor, Codex, and others via a single command such as ‘npx skills add’.”
    • question: “What does code go through before it is finally delivered to the developer?” choices: [“An automatic translation process”, “About 57–65 ‘slop test’ gates”, “A data encryption process”] answer: 1 explanation: “Instead of immediately showing AI-generated code, Hallmark puts it through dozens of test gates that verify adherence to design rules and originality.” lang: en ref: 2026-07-27-Hallmark-Anti-AI-Slop-Design-Skill-for-Claude-Code-Cursor-and-Codex —

Imagine you ask an AI, “Build me a clean website for my business.” A moment later, you see the completed site, and for some reason, it looks exactly like another site you saw made by AI last week, just with different colors. It feels cookie-cutter; in the design world, this is called ‘AI slop.’ It is a phenomenon caused by the ‘average design habits’ that AI has adopted.

Recently, a smart tool has emerged to solve this problem. It is an open-source design skill developed by Together AI called Hallmark.

Why Is This Important?

AI coding tools like Claude Code, Cursor, and Codex have dramatically improved development efficiency, but they carry one chronic issue: artificial intelligence models tend to derive the ‘average’ from the data they encountered most frequently during their training process. Because of this, most UI (User Interface) created by AI ends up with similar structures and clichéd layouts.

Hallmark blocks this ‘AI complacency.’ Without the developer needing to manually edit every design, professional design rules are forcibly applied starting from the stage where the AI writes the code. This means you no longer get cookie-cutter template results, but rather original output that looks like it was intentionally crafted by a human.

Easy to Understand: A ‘Design Checkpoint’ for AI

The easiest analogy for understanding Hallmark is having a ‘harsh design critic’ by your side. Hallmark refines AI designs through the following process:

1. Refuse: Hallmark firmly rejects common structures that AI chooses by default without much thought.
2. Apply: Instead, Hallmark injects sophisticated rules regarding typography (fonts), color, layout, motion, and micro-interactions into the code Source 5, Source 15, Source 18.
3. Test: The core of Hallmark is its ‘slop-test’ gates. Before the generated code is finally delivered to the developer, Hallmark passes it through approximately 57 to 65 inspection gates Source 10, Source 11, Source 12, Source 16.

This process is similar to applying a filter in a photo app. On the rough sketch AI drew, the ‘Hallmark filter’ meticulously adds color and refines the structure, transforming it into a high-quality piece of work.

Current Status

Currently, Hallmark can be easily installed in popular AI coding tools like Claude Code, Cursor, and Codex with a single command Source 5, Source 19.

This tool goes beyond simple theme changes to provide between 20 and 22 structural themes, and developers can also use the hallmark audit command to check if their existing code contains ‘AI slop’ patterns Source 1, Source 2, Source 10, Source 18. As of July 2026, it has already received over 17,700 stars on GitHub, drawing significant attention from many developers Source 19.

What Comes Next?

Moving forward, being an “AI that writes code well” will not be enough; “AI with a sense of design” will become the standard. Hallmark has taken the first step in changing AI’s habits by encoding design rules into code Source 12, Source 16. We look forward to more design skills being developed so that every AI service we use transforms into a space with its own personality, rather than a “copy-paste” website.

AI’s Perspective

Demanding creativity from AI is difficult, but teaching it “what not to do” is possible. Hallmark is fascinating because it forces technology to go beyond merely mimicking human aesthetics and adopt a unique personality. Rejecting AI’s ‘defaults’ will become an essential process for reclaiming human-like creativity.

References

1. Nutlope/hallmark: Anti-AI-slop design skill for Claude Code, Cursor… (https://github.com/Nutlope/hallmark)
2. Hallmark - Anti-AI Design Skill for Claude Code, Cursor, and Codex (https://hallmark.apposters.com/)

3. Hallmark: Anti-AI Slop Design for Claude, Cursor, Codex

   LinkedIn (https://www.linkedin.com/posts/arkadiy-sotnikov_github-nutlopehallmark-anti-ai-slop-design-activity-7483500613071167489-_zmV)

4. Hallmark: Anti-AI-slop design skill for Claude Code, Cursor, and… (https://addrom.com/hallmark-anti-ai-slop-design-skill-for-claude-code-cursor-and-codex/)

5. Hallmark - AI Design Rules for Coding Agents

   EveryDev.ai (https://www.everydev.ai/tools/hallmark)

6. Hallmark

   Analog (https://analoghq.ai/nutlope/skills/hallmark)

7. Hallmark + Claude Code, Codex: The BEST DESIGN SKILL YET! (https://www.youtube.com/watch?v=dVGJ3DE1MzA)
8. GitHub - Nutlope/hallmark: Anti-AI-slop design skill for Claude Code, Cursor, and Codex. · GitHub (https://github.com/Nutlope/hallmark)
9. hallmark/skills/hallmark at main · Nutlope/hallmark (https://github.com/Nutlope/hallmark/tree/main/skills/hallmark)
10. Hallmark Design Skill: Kill AI-Generated UI with Structural … (https://dailyaiworld.com/blogs/hallmark-design-skill-anti-slop-2026)

11. Hallmark - AI Agent Skill

    AgentConn (https://agentconn.com/skills/hallmark/)

12. Hallmark Design Skill: Anti-AI-Slop UI for Agents (2026) (https://explainx.ai/blog/nutlope-hallmark-anti-ai-slop-design-skill-july-2026)

13. Hallmark: Anti-AI-Slop Techniques for Claude Code and Cursor

    AIToolly (https://aitoolly.com/ai-news/article/2026-07-15-hallmark-new-anti-ai-slop-design-techniques-for-claude-code-cursor-and-codex-developers)

14. Hallmark: Rejecting AI-Slop in Claude Code and Cursor

    AIToolly (https://aitoolly.com/ai-news/article/2026-07-16-hallmark-a-new-design-skill-to-eliminate-ai-slop-in-claude-code-and-cursor)

15. Hallmark Design Skill: Anti-AI-Slop UI for Claude Code and … (https://mer.vin/2026/05/hallmark-design-skill-anti-slop-ui-for-claude-code-and-cursor/)
16. Hallmark Design Skill: Anti-AI-Slop UI for Agents (2026 … (https://www.explainx.ai/blog/nutlope-hallmark-anti-ai-slop-design-skill-july-2026)
17. Hallmark Guide: Anti-AI-Slop Design for Claude Code, Curs… (https://opentools.ai/resources/hallmark)
18. GitHub - adeoyewole028/hallmark-design-skills: Anti-AI-slop … (https://github.com/adeoyewole028/hallmark-design-skills)

19. hallmark — Anti-AI-slop design skill for Claude …

    GitTrend (https://gittrend.io/repo/Nutlope/hallmark)