Hallmark skill for Codex
Anti-AI-slop design skill for Claude Code, Cursor, and Codex.
How to install Hallmark in Codex
In Codex, ask the built-in skill installer for it:
$skill-installer install https://github.com/Nutlope/hallmark/tree/main/skills/hallmarkType this in Codex: $skill-installer is the skill installer built into Codex, and it downloads the skill from GitHub. Restart Codex if the skill doesn't show up. Check the repo README for any setup the skill needs. Source: Codex skills docs.
Or copy the skill folder (the one with SKILL.md) into ~/.agents/skills to use it in every project, or into .agents/skills in a repo to share it with that repo. Codex picks up new skills automatically. (where Codex loads skills)
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What it contains
Skills (1)
hallmark— Design skill for websites and new pages that look designed, not generated. Use when the user asks to build or design something new, or names Hallmark. Never use it on an existing design unless the user names Hallmark, as in `/hallmark redesign <path>`.
About this listing
Hallmark is a community collection of agent skills on GitHub by Nutlope: folders with a SKILL.md file, the format Codex loads skills from. Its README mentions Codex. It passed the CodexStacks quality filter for skills (at least 100 stars, pushed in the last 90 days, not a fork or a list, and at least one SKILL.md with a name and description). OpenAI hasn't reviewed it, but it passed our Codex install check on Oct 29, 2026 (an install and load check, not a code review). From its files we found 1 skill. It's one of 137 listings in the Creativity category (category assigned by CodexStacks from the repo's topics and description). It also appears in best Codex plugins for design and UI.
Hallmark FAQ
How do I install Hallmark in Codex?
In Codex, type $skill-installer install https://github.com/Nutlope/hallmark/tree/main/skills/hallmark. $skill-installer is the skill installer built into Codex (Codex skills docs). Or copy the skill folder (the one with SKILL.md) into ~/.agents/skills to use it in every project, or into .agents/skills in a repo to share it with that repo. Codex picks up new skills automatically.
Is Hallmark an official Codex skill?
No. Hallmark is a community repo on GitHub by Nutlope. It passed the CodexStacks quality filter, but OpenAI hasn't reviewed it, but it passed our Codex install check on Oct 29, 2026 (an install and load check, not a code review), so read the code before you install it.
What does Hallmark include?
From its manifest and repo files, Hallmark includes 1 skill: hallmark.
Details
- Type
- Skill
- Category
- Creativity (assigned by us)
- Source
- Community
- Author
- Nutlope
- License
- MIT
- GitHub stars
- 41,396 (at last sync)
- Last push
- 2026-10-28
- Source
- https://github.com/Nutlope/hallmark
- Website
- https://www.usehallmark.com/
- Listed via
- GitHub search: Codex skills (SKILL.md)
- Install check by CodexStacks
- Passed on Oct 29, 2026 with Codex CLI 0.163.0: Codex loaded its skills. proof · how we check
Something wrong or missing? Submit or improve this listing. Listings also refresh automatically every night.
For maintainers: badge and embeds
Maintain Hallmark? Add the badge; it links to this page.
Markdown
[](https://codexstacks.com/p/hallmark/)HTML
<a href="https://codexstacks.com/p/hallmark/"><img src="https://codexstacks.com/badge.svg" alt="Listed on CodexStacks" width="172" height="28"></a>Embed card (static HTML and inline CSS, no JavaScript). Preview:
<a href="https://codexstacks.com/p/hallmark/" style="display:block;max-width:380px;box-sizing:border-box;padding:14px 16px;border:1px solid #3a2c26;border-radius:12px;background:#0d0b0a;color:#f3ece6;font:14px/1.45 -apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;text-decoration:none"><span style="display:block;font-size:16px;font-weight:700;color:#f3ece6">Hallmark</span><span style="display:block;margin:2px 0 8px;font-size:12px;color:#b5a9a1">Community Codex skill · 1 skill</span><span style="display:block;margin:0 0 10px;color:#ddd3cc">Anti-AI-slop design skill for Claude Code, Cursor, and Codex.</span><span style="font-size:12px;font-weight:600;color:#ffb347">View on CodexStacks →</span></a>Markdown summary
**[Hallmark on CodexStacks](https://codexstacks.com/p/hallmark/)**: Community Codex skill with 1 skill.More on badges, embeds and keeping your listing up to date: CodexStacks for plugin authors.
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