card-twitter

Each tab says whether it installs commit 975fb3b, the one we checked, or the latest version.

tmp="$(mktemp -d)" &&
  git clone -q --depth 1 --filter=blob:none --no-checkout https://github.com/nexu-io/html-anything.git "$tmp" &&
  git -C "$tmp" fetch -q --depth 1 origin 975fb3bcb98f1777781fb4c738902d36e32c8c46 &&
  git -C "$tmp" sparse-checkout set -- next/src/lib/templates/skills/card-twitter &&
  git -C "$tmp" checkout -q 975fb3bcb98f1777781fb4c738902d36e32c8c46 &&
  mkdir -p .claude/skills &&
  mkdir .claude/skills/card-twitter &&
  cp -R "$tmp"/next/src/lib/templates/skills/card-twitter/. .claude/skills/card-twitter/ &&
  rm -rf "$tmp"

tmp="$(mktemp -d)" &&
  git clone -q --depth 1 --filter=blob:none --no-checkout https://github.com/nexu-io/html-anything.git "$tmp" &&
  git -C "$tmp" fetch -q --depth 1 origin 975fb3bcb98f1777781fb4c738902d36e32c8c46 &&
  git -C "$tmp" sparse-checkout set -- next/src/lib/templates/skills/card-twitter &&
  git -C "$tmp" checkout -q 975fb3bcb98f1777781fb4c738902d36e32c8c46 &&
  out="$(mktemp -d)" &&
  cp -R "$tmp"/next/src/lib/templates/skills/card-twitter "$out"/card-twitter &&
  (cd "$out" && zip -qr - card-twitter) > card-twitter.zip &&
  rm -rf "$tmp" "$out"

tmp="$(mktemp -d)" &&
  git clone -q --depth 1 --filter=blob:none --no-checkout https://github.com/nexu-io/html-anything.git "$tmp" &&
  git -C "$tmp" fetch -q --depth 1 origin 975fb3bcb98f1777781fb4c738902d36e32c8c46 &&
  git -C "$tmp" sparse-checkout set -- next/src/lib/templates/skills/card-twitter &&
  git -C "$tmp" checkout -q 975fb3bcb98f1777781fb4c738902d36e32c8c46 &&
  mkdir -p .agents/skills &&
  mkdir .agents/skills/card-twitter &&
  cp -R "$tmp"/next/src/lib/templates/skills/card-twitter/. .agents/skills/card-twitter/ &&
  rm -rf "$tmp"

tmp="$(mktemp -d)" &&
  git clone -q --depth 1 --filter=blob:none --no-checkout https://github.com/nexu-io/html-anything.git "$tmp" &&
  git -C "$tmp" fetch -q --depth 1 origin 975fb3bcb98f1777781fb4c738902d36e32c8c46 &&
  git -C "$tmp" sparse-checkout set -- next/src/lib/templates/skills/card-twitter &&
  git -C "$tmp" checkout -q 975fb3bcb98f1777781fb4c738902d36e32c8c46 &&
  mkdir -p .cursor/skills &&
  mkdir .cursor/skills/card-twitter &&
  cp -R "$tmp"/next/src/lib/templates/skills/card-twitter/. .cursor/skills/card-twitter/ &&
  rm -rf "$tmp"

tmp="$(mktemp -d)" &&
  git clone -q --depth 1 --filter=blob:none --no-checkout https://github.com/nexu-io/html-anything.git "$tmp" &&
  git -C "$tmp" fetch -q --depth 1 origin 975fb3bcb98f1777781fb4c738902d36e32c8c46 &&
  git -C "$tmp" sparse-checkout set -- next/src/lib/templates/skills/card-twitter &&
  git -C "$tmp" checkout -q 975fb3bcb98f1777781fb4c738902d36e32c8c46 &&
  mkdir -p .github/skills &&
  mkdir .github/skills/card-twitter &&
  cp -R "$tmp"/next/src/lib/templates/skills/card-twitter/. .github/skills/card-twitter/ &&
  rm -rf "$tmp"

gh skill install nexu-io/html-anything next/src/lib/templates/skills/card-twitter/SKILL.md@975fb3bcb98f1777781fb4c738902d36e32c8c46 --agent github-copilot --scope project

tmp="$(mktemp -d)" &&
  git clone -q --depth 1 --filter=blob:none --no-checkout https://github.com/nexu-io/html-anything.git "$tmp" &&
  git -C "$tmp" fetch -q --depth 1 origin 975fb3bcb98f1777781fb4c738902d36e32c8c46 &&
  git -C "$tmp" sparse-checkout set -- next/src/lib/templates/skills/card-twitter &&
  git -C "$tmp" checkout -q 975fb3bcb98f1777781fb4c738902d36e32c8c46 &&
  mkdir -p .gemini/skills &&
  mkdir .gemini/skills/card-twitter &&
  cp -R "$tmp"/next/src/lib/templates/skills/card-twitter/. .gemini/skills/card-twitter/ &&
  rm -rf "$tmp"

gemini skills install https://github.com/nexu-io/html-anything.git --path next/src/lib/templates/skills/card-twitter --scope workspace

tmp="$(mktemp -d)" &&
  git clone -q --depth 1 --filter=blob:none --no-checkout https://github.com/nexu-io/html-anything.git "$tmp" &&
  git -C "$tmp" fetch -q --depth 1 origin 975fb3bcb98f1777781fb4c738902d36e32c8c46 &&
  git -C "$tmp" sparse-checkout set -- next/src/lib/templates/skills/card-twitter &&
  git -C "$tmp" checkout -q 975fb3bcb98f1777781fb4c738902d36e32c8c46 &&
  mkdir -p .agents/skills &&
  mkdir .agents/skills/card-twitter &&
  cp -R "$tmp"/next/src/lib/templates/skills/card-twitter/. .agents/skills/card-twitter/ &&
  rm -rf "$tmp"

npx skills@1.7.4 add nexu-io/html-anything --skill card-twitter

From the files and frontmatter at commit 975fb3b. This is how much a skill can do, not whether it is risky.

What it can touch: Scripts or outside hosts

• Names web addresses

  It mentions outside web addresses the agent may visit. We list them but don't follow them.

Pattern check: nothing flagged · commit 975fb3b · 27 Oct 2026

We checked every text file in this skill, at commit 975fb3b on 27 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

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: zh_name, en_name, emoji, category, scenario, aspect_hint, tags, example_id and 4 more. 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

    The description doesn't say when to use the skill. D6

    Fix: Add a sentence such as "Use when …" naming the requests or files that should trigger it.

  • 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.

  • Note

    Reference files that SKILL.md doesn't link: example.md. Anthropic suggests linking every reference file directly from SKILL.md. B4

    Fix: Link each one from SKILL.md and say when to read it.

• 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: zh_name, en_name, emoji, category, scenario, aspect_hint, tags, example_id and 4 more. O1

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

  • Note

    Reference files that SKILL.md doesn't link: example.md. Anthropic suggests linking every reference file directly from SKILL.md. B4

    Fix: Link each one from SKILL.md and say when to read it.

• 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: zh_name, en_name, emoji, category, scenario, aspect_hint, tags, example_id and 4 more. O1

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

  • Note

    Reference files that SKILL.md doesn't link: example.md. Anthropic suggests linking every reference file directly from SKILL.md. B4

    Fix: Link each one from SKILL.md and say when to read it.

• 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: zh_name, en_name, emoji, category, scenario, aspect_hint, tags, example_id and 4 more. 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: zh_name, en_name, emoji, category, scenario, aspect_hint, tags, example_id and 4 more. O1

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

3 files