ecommerce-ab-testing

From the files and frontmatter at commit ee0fb29. This is how much a skill can do, not whether it is risky.

• Installs more skills

  It tells the agent to install other skills, plugins or tool servers.

  SKILL.md:19 (opens in a new tab)

• Runs shell commands

  Its instructions or files give the agent commands to run on your computer.

  SKILL.md:19 (opens in a new tab)

• Names web addresses

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

  Outside links we did not follow

Pattern check: nothing flagged · commit ee0fb29 · 29 Oct 2026

We checked every text file in this skill, at commit ee0fb29 on 29 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 specFails

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

  • Error

    The file doesn't start with a --- line, so it has no frontmatter. The spec requires a name and description there. F3

    Fix: Start the file with ---, then name: and description: lines, then a closing --- line.

• Claude CodePasses with warnings

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

  • Warning

    The file doesn't start with a --- line, so it has no frontmatter. Claude Code reads it all as instructions: the name falls back to the folder and the description to the first line. F3

    Fix: Start the file with ---, then name: and description: lines, then a closing --- line.

• 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

    The file doesn't start with a --- line, so it has no frontmatter. Anthropic's validator stops with "No YAML frontmatter found". F3

    Fix: Start the file with ---, then name: and description: lines, then a closing --- line.

• OpenAI (Codex & API)Fails

  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.

  • Error

    The file doesn't start with a --- line, so it has no frontmatter. Codex can't find a name or description and skips the skill. F3

    Fix: Start the file with ---, then name: and description: lines, then a closing --- line.

• VS Code & CopilotPasses with warnings

  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.

  • Warning

    The file doesn't start with a --- line, so it has no frontmatter. VS Code lists the skill under its folder name with no description for the agent to match. F3

    Fix: Start the file with ---, then name: and description: lines, then a closing --- line.

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