Skills

email-marketing

email-marketing is a skill in nexu-io/open-design, last changed 27 Jul 2026. It is instructions only: no scripts, no named hosts and no pre-approved tools. Our pattern check flagged nothing at commit 325494e on 26 Oct 2026.

Pattern check: nothing flagged · commit 325494e · 26 Oct 2026

Install
From the author
A brand product-launch email — masthead with wordmark, hero image block, headline lockup with skewed-italic accent, body copy, primary CTA, and a specifications grid. Pure HTML email layout (centered single column, table fallback). Use when the brief asks for an "email", "newsletter blast", "MJML", "product launch email", or "email template".
Licence
Apache 2.0
Repo stars
104.2k
Folder last changed
27 Jul 2026 (opens in a new tab)
Publisher
nexu-io
Files
2 files
Checked
325494e (opens in a new tab) · 26 Oct 2026

Install

Each tab says whether it installs commit 325494e, the one we checked, or the latest version.

No tab for your agent? Use Any agent for OpenCode, Goose, Windsurf (Devin Desktop), Zed, Roo Code, Factory Droid, Junie, Amp and Antigravity, and Claude Code for Cline. Kiro needs the folder copied by hand.

Pinned to commit 325494e, the one we checked.

From your project's root folder:

tmp="$(mktemp -d)" &&
  git clone -q --depth 1 --filter=blob:none --no-checkout https://github.com/nexu-io/open-design.git "$tmp" &&
  git -C "$tmp" fetch -q --depth 1 origin 325494e5a1e5858f7aa63bd71d7f326bdf911e7f &&
  git -C "$tmp" sparse-checkout set -- design-templates/email-marketing &&
  git -C "$tmp" checkout -q 325494e5a1e5858f7aa63bd71d7f326bdf911e7f &&
  mkdir -p .claude/skills &&
  mkdir .claude/skills/email-marketing &&
  cp -R "$tmp"/design-templates/email-marketing/. .claude/skills/email-marketing/ &&
  rm -rf "$tmp"

If Claude Code was already running and this created the skills folder, run /reload-skills.

Claude Code docs (opens in a new tab)

What it can touch

From the files and frontmatter at commit 325494e. This is how much a skill can do, not whether it is risky.

What it can touch: Instructions only

It is instructions only: no scripts, no named hosts and no pre-approved tools.

Pattern check

Pattern check: nothing flagged · commit 325494e · 26 Oct 2026

We checked every text file in this skill, at commit 325494e on 26 Oct 2026, against 45 published patterns such as download-and-run commands, hidden text and credential access. We don't run the skill, we don't read the web pages it points to, and we can't judge everything its instructions might lead an agent to do. In published tests, pattern checks like this one missed most malicious skills. Read the skill before you install it — especially anything it asks you to download or run.

How the check worksReport an incorrect finding

Format check

Each agent reads SKILL.md a little differently. We check the file against each one's published rules; we don't run the skill in any agent.

  • Agent Skills specPasses with warnings

    The open format from agentskills.io, held to what the strictest agents enforce, so one folder loads everywhere.

    • Warning

      The frontmatter uses [ ] or { } values. Most agents accept them, but the spec's validator (skills-ref) rejects the file. F4

      Fix: Write lists as "- item" lines and maps as indented key: value lines, without anchors or tags.

    • Warning

      Fields outside the spec: triggers and od. Uploads to the Claude apps and API, and the spec's validator, reject the file; most agents ignore these fields. O1

      Fix: Delete them for a portable skill, or keep them if you only target the agents that read them.

    • Note

      There is no license field, so readers can't tell whether they may reuse the skill. O2

      Fix: Add license: with an SPDX name such as MIT or Apache-2.0, or the name of a bundled licence file.

  • Claude CodePasses

    Claude Code reads its own extra fields, ignores unknown ones, and still loads a skill whose frontmatter is broken, without its fields.

    • Note

      Claude Code ignores fields it doesn't know: triggers and od. O1

      Fix: Check the spelling against Claude Code's field list, or delete them.

  • Claude apps & API uploadFails

    Uploading to claude.ai or the Claude API, or packaging with Anthropic's script, accepts only the six spec fields and stops on anything else.

    • Error

      Upload and packaging fail on fields outside the spec: triggers and od. O1

      Fix: Delete them, and keep your own data under metadata as text values.

    • Note

      The description is 344 characters. The claude.ai Help Center says 200 at most, though Anthropic's API docs and validator allow 1,024. D4

      Fix: If the claude.ai upload refuses it, trim the description to 200 characters.

  • OpenAI (Codex & API)Passes with warnings

    Codex finds SKILL.md by its exact name and needs a description; OpenAI's Skills API checks the frontmatter against the spec and caps uploads.

    • Warning

      Fields outside the spec: triggers and od. Codex ignores them; OpenAI doesn't say whether its upload accepts them. O1

      Fix: Delete them, or move your own data under metadata as text values.

  • VS Code & CopilotPasses

    VS Code reads skills one folder below .github/skills, .claude/skills or .agents/skills and falls back to the folder name when the name is missing or differs; GitHub's Copilot docs require the exact name SKILL.md.

    • Note

      VS Code ignores fields it doesn't support: triggers and od. O1

      Fix: Delete them unless another agent you target reads them.

SKILL.md

Files

2 files

PathSize
SKILL.md (opens in a new tab)3.4 KB
example.html (opens in a new tab)9.6 KB

Copies

These share its SKILL.md or its name and description but not all its files, so we list them separately.

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