SkillGild
Security

Security Guidance (Anthropic)

Anthropic's official security plugin: instant pattern warnings on edits for known-dangerous calls (unsafe deserialisation, raw innerHTML, hard-coded secrets) and a post-turn review that sends the diff to a fast model and feeds high-severity findings back to Claude to fix before you see the response.

skillgild install security-guidance
Works with
  • Claude Code
  • Codex
  • Cursor
  • Gemini CLI
and any agent that reads SKILL.md

License: Apache-2.0 · Created by Anthropic · The project lists support for Claude Code

Free

What you get

  • Anthropic's official security plugin: instant pattern warnings on edits for known-dangerous calls (unsafe deserialisation, raw innerHTML, hard-coded secrets) and a post-turn review that sends the diff to a fast model and feeds high-severity findings back to Claude to fix before you see the response.
  • Pairs with the built-in /security-review command.

Install the Security Guidance (Anthropic) skill

A community skill: it installs from its own repository and your agent runs the project's instructions locally with your own model. SkillGild lists it and credits the author; nothing runs on SkillGild.

  1. With the SkillGild CLI (needs git). It clones anthropics/claude-plugins-official and copies the skill folder into the right place for your agent; use --agent codex, cursor or gemini-cli for other clients.

    Terminal
    skillgild install security-guidance --agent claude-code
  2. Claude Code plugin marketplace.

    Terminal
    /plugin install security-guidance@claude-plugins-official
  3. Manual copy.

    Terminal
    Install from the official marketplace; Claude Code adds it automatically
  4. Or copy the folder yourself from anthropics/claude-plugins-official (folder plugins/security-guidance) into ~/.claude/skills/security-guidance/ for Claude Code, ~/.agents/skills/ for Codex, ~/.cursor/skills/ for Cursor or ~/.gemini/skills/ for Gemini CLI, then start a new session.

Try asking

Requests that trigger this skill once it is installed in your agent.

  • Review this PR for security issues before I merge
  • Check the upload handler for path traversal
  • Run /security-review on the pending changes

Questions

How do I install the Security Guidance (Anthropic) skill in Claude Code?

Run skillgild install security-guidance --agent claude-code: the SkillGild CLI clones anthropics/claude-plugins-official and copies the skill folder into ~/.claude/skills/security-guidance. You can also use the project's own commands shown above, or copy the folder yourself. Use --agent codex, cursor or gemini-cli for other clients.

Is Security Guidance (Anthropic) free and open source?

Yes. The upstream repository is published under the Apache-2.0 license by Anthropic. SkillGild lists and credits it and installs it from source; it does not host or run it.

Which agents does Security Guidance (Anthropic) work with?

The project lists Claude Code. It is a plain Agent Skills folder (SKILL.md plus supporting files), so any client that reads that format can load it.

Does Security Guidance (Anthropic) run on SkillGild?

No. Security Guidance (Anthropic) is a community skill: your agent runs its instructions locally with your own model, and SkillGild lists, credits and installs it. Hosted SkillGild skills are marked differently and run through the SkillGild MCP server.

Related guides

Setup steps and worked examples for this kind of skill.