claude-security

anthropics/claude-plugins-officialOfficial collectionSecurity Coding & code review

claude-security is a skill in anthropics/claude-plugins-official, last changed 25 Sept 2026. It can run shell commands, reach the network, name web addresses, pre-approve tools and run commands as it loads — read the findings before installing.

From the author

Claude Security: scan the codebase (the whole repository or a scoped part of it), scan changes (this branch's or a pull request's diff, or one commit), or suggest patches (findings turned into targeted patch files, each verified by a panel of agents, that you apply when you choose). Use when the user asks to scan, audit or check code with Claude Security, to scan their changes with Claude Security, or to fix or patch Claude Security findings.

What it can touch

Runs shell commands
Reaches the network
Names web addresses
Pre-approves tools
Runs commands as it loads
+2 more
- Pre-approves tools
- Runs commands as it loads

How much a skill can do, not whether it is risky.

Pattern check

3 items to review

Broad tools pre-approved in allowed-tools

R34 · High · SKILL.md:6 and 2 more

Commit a7ba5b9 · 3 Nov 2026

How the check works

Pattern check:3 items to reviewSee them

Install

Each tab says whether it installs commit a7ba5b9, the one we checked, or the latest version.

OpenCode also looks in .agents/skills/ and ~/.agents/skills/, so use the Any agent steps.

Goose also looks in .agents/skills/ and ~/.agents/skills/, so use the Any agent steps.

Windsurf (Devin Desktop) also looks in .agents/skills/ and ~/.agents/skills/, so use the Any agent steps.

Zed also looks in .agents/skills/ and ~/.agents/skills/, so use the Any agent steps.

Roo Code also looks in .agents/skills/ and ~/.agents/skills/, so use the Any agent steps.

Factory Droid also looks in .agents/skills/ and ~/.agents/skills/, so use the Any agent steps.

Junie also looks in .agents/skills/ and ~/.agents/skills/, so use the Any agent steps.

Amp also looks in .agents/skills/ and ~/.agents/skills/, so use the Any agent steps.

No install command here reaches Kiro. Copy the skill's folder into .kiro/skills/ in your project, or ~/.kiro/skills/ for all your projects. anthropics/claude-plugins-official/plugins/claude-security/skills/claude-security (opens in a new tab)

Antigravity also looks in .agents/skills/, so the Any agent steps reach it with This project. For All projects, see where Antigravity looks.

Cline also looks in .claude/skills/, so the Claude Code steps reach it with This project. For All projects, see where Cline looks.

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

Read these 3 items before installing, starting with Broad tools pre-approved in allowed-tools — SKILL.md:6

Pinned to commit a7ba5b9, the one we checked.

From your project's root folder:

tmp="$(mktemp -d)" &&git clone -q --depth 1 --filter=blob:none --no-checkout https://github.com/anthropics/claude-plugins-official.git "$tmp" &&git -C "$tmp" fetch -q --depth 1 origin a7ba5b93db0c7c8d17f3f1d25853adca79598a1a &&git -C "$tmp" sparse-checkout set -- plugins/claude-security/skills/claude-security &&git -C "$tmp" checkout -q a7ba5b93db0c7c8d17f3f1d25853adca79598a1a &&mkdir -p .claude/skills &&mkdir .claude/skills/claude-security &&cp -R "$tmp"/plugins/claude-security/skills/claude-security/. .claude/skills/claude-security/ &&rm -rf "$tmp"

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

Or install the claude-security plugin it ships in. Installs the latest version, not the one we checked. Installs everything in the plugin, including any hooks, MCP servers and scripts our check doesn't cover.

claude plugin marketplace add anthropics/claude-plugins-official --scope project &&claude plugin install claude-security@claude-plugins-official --scope project

Claude Code docs

Pinned to commit a7ba5b9, the one we checked.

Skills in the Claude apps belong to your account rather than to a project.

Make claude-security.zip, with the skill folder at the top level:

tmp="$(mktemp -d)" &&git clone -q --depth 1 --filter=blob:none --no-checkout https://github.com/anthropics/claude-plugins-official.git "$tmp" &&git -C "$tmp" fetch -q --depth 1 origin a7ba5b93db0c7c8d17f3f1d25853adca79598a1a &&git -C "$tmp" sparse-checkout set -- plugins/claude-security/skills/claude-security &&git -C "$tmp" checkout -q a7ba5b93db0c7c8d17f3f1d25853adca79598a1a &&out="$(mktemp -d)" &&cp -R "$tmp"/plugins/claude-security/skills/claude-security "$out"/claude-security &&(cd "$out" && zip -qr - claude-security) > claude-security.zip &&rm -rf "$tmp" "$out"

In Claude, open Customize > Skills, select +, then + Create skill > Upload a skill, and choose claude-security.zip.

On Free, Pro and Max plans, turn on Code execution and file creation (Create and edit files in newer settings) under Settings > Capabilities.

Claude apps docs

Pinned to commit a7ba5b9, the one we checked.

From your project's root folder:

tmp="$(mktemp -d)" &&git clone -q --depth 1 --filter=blob:none --no-checkout https://github.com/anthropics/claude-plugins-official.git "$tmp" &&git -C "$tmp" fetch -q --depth 1 origin a7ba5b93db0c7c8d17f3f1d25853adca79598a1a &&git -C "$tmp" sparse-checkout set -- plugins/claude-security/skills/claude-security &&git -C "$tmp" checkout -q a7ba5b93db0c7c8d17f3f1d25853adca79598a1a &&mkdir -p .agents/skills &&mkdir .agents/skills/claude-security &&cp -R "$tmp"/plugins/claude-security/skills/claude-security/. .agents/skills/claude-security/ &&rm -rf "$tmp"

Codex picks up new skills on its own; restart it if this one does not appear.

Codex docs

Pinned to commit a7ba5b9, the one we checked.

From your project's root folder:

tmp="$(mktemp -d)" &&git clone -q --depth 1 --filter=blob:none --no-checkout https://github.com/anthropics/claude-plugins-official.git "$tmp" &&git -C "$tmp" fetch -q --depth 1 origin a7ba5b93db0c7c8d17f3f1d25853adca79598a1a &&git -C "$tmp" sparse-checkout set -- plugins/claude-security/skills/claude-security &&git -C "$tmp" checkout -q a7ba5b93db0c7c8d17f3f1d25853adca79598a1a &&mkdir -p .cursor/skills &&mkdir .cursor/skills/claude-security &&cp -R "$tmp"/plugins/claude-security/skills/claude-security/. .cursor/skills/claude-security/ &&rm -rf "$tmp"

Cursor docs

Pinned to commit a7ba5b9, the one we checked.

From your project's root folder:

tmp="$(mktemp -d)" &&git clone -q --depth 1 --filter=blob:none --no-checkout https://github.com/anthropics/claude-plugins-official.git "$tmp" &&git -C "$tmp" fetch -q --depth 1 origin a7ba5b93db0c7c8d17f3f1d25853adca79598a1a &&git -C "$tmp" sparse-checkout set -- plugins/claude-security/skills/claude-security &&git -C "$tmp" checkout -q a7ba5b93db0c7c8d17f3f1d25853adca79598a1a &&mkdir -p .github/skills &&mkdir .github/skills/claude-security &&cp -R "$tmp"/plugins/claude-security/skills/claude-security/. .github/skills/claude-security/ &&rm -rf "$tmp"

In a running Copilot CLI session, run /skills reload.

Or install it with gh skill, which also installs the commit we checked. Needs GitHub CLI 2.90 or later.

gh skill install anthropics/claude-plugins-official plugins/claude-security/skills/claude-security/SKILL.md@a7ba5b93db0c7c8d17f3f1d25853adca79598a1a --agent github-copilot --scope project

Copilot & VS Code docs

Pinned to commit a7ba5b9, the one we checked.

From your project's root folder:

tmp="$(mktemp -d)" &&git clone -q --depth 1 --filter=blob:none --no-checkout https://github.com/anthropics/claude-plugins-official.git "$tmp" &&git -C "$tmp" fetch -q --depth 1 origin a7ba5b93db0c7c8d17f3f1d25853adca79598a1a &&git -C "$tmp" sparse-checkout set -- plugins/claude-security/skills/claude-security &&git -C "$tmp" checkout -q a7ba5b93db0c7c8d17f3f1d25853adca79598a1a &&mkdir -p .gemini/skills &&mkdir .gemini/skills/claude-security &&cp -R "$tmp"/plugins/claude-security/skills/claude-security/. .gemini/skills/claude-security/ &&rm -rf "$tmp"

In a running session, run /skills reload.

Or use Gemini CLI’s own installer. Installs the latest version, not the one we checked.

gemini skills install https://github.com/anthropics/claude-plugins-official.git --path plugins/claude-security/skills/claude-security --scope workspace

Gemini CLI docs

Pinned to commit a7ba5b9, the one we checked.

OpenCode, Goose, Windsurf (Devin Desktop), Zed, Roo Code, Factory Droid, Junie, Amp and Antigravity read .agents/skills in a project.

From your project's root folder:

tmp="$(mktemp -d)" &&git clone -q --depth 1 --filter=blob:none --no-checkout https://github.com/anthropics/claude-plugins-official.git "$tmp" &&git -C "$tmp" fetch -q --depth 1 origin a7ba5b93db0c7c8d17f3f1d25853adca79598a1a &&git -C "$tmp" sparse-checkout set -- plugins/claude-security/skills/claude-security &&git -C "$tmp" checkout -q a7ba5b93db0c7c8d17f3f1d25853adca79598a1a &&mkdir -p .agents/skills &&mkdir .agents/skills/claude-security &&cp -R "$tmp"/plugins/claude-security/skills/claude-security/. .agents/skills/claude-security/ &&rm -rf "$tmp"

Or use the skills CLI from skills.sh. Installs the latest version, not the one we checked. The skills CLI reports installs to skills.sh unless you set DISABLE_TELEMETRY=1.

npx skills@1.7.4 add anthropics/claude-plugins-official --skill claude-security

Agent Skills docs

Read SKILL.md first

Apache 2.0

Licence

45.9k

Repo stars

Folder last changed

Publisher

Files

Checked

3 Nov 2026

What it can touch

From the files and frontmatter at commit a7ba5b9. This is how much a skill can do, not whether it is risky.

Runs shell commands
Its instructions or files give the agent commands to run on your computer.
SKILL.md:32 (opens in a new tab) · SKILL.md:67 (opens in a new tab)
Reaches the network
It sends or fetches data over the internet, for example with curl, an HTTP library or a package install.
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
Pre-approves tools
Its allowed-tools field lists tools the agent may use without asking you first, in agents that honour it.
SKILL.md:6 (opens in a new tab)
Runs commands as it loads
Claude Code runs its !command lines when the skill loads, before the agent reads it, if your permission rules allow them.
SKILL.md:32 (opens in a new tab) · SKILL.md:67 (opens in a new tab)

Pattern check

Pattern check: 3 items to review · commit a7ba5b9 · 3 Nov 2026

R34 · HighBroad tools pre-approved in allowed-tools
SKILL.md:6 (opens in a new tab)
```
- Write
```
R44 · HighLoad-time command pre-approved by allowed-tools
SKILL.md:32 (opens in a new tab)
```
- Session start time (UTC): !`date -u +%Y%m%d-%H%M%S`
```

R44 · HighLoad-time command pre-approved by allowed-tools

SKILL.md:67

- Existing reports (blank when none): !`find . -maxdepth 1 -type d -name "CLAUDE-SECURITY-2*"`

We checked every text file in this skill, at commit a7ba5b9 on 3 Nov 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 works Report an incorrect finding

Outside links we did not follow

https://github.com/anthropic-experimental/sandbox-runtime

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 the strictest version of each rule among the agents we check.
- Warning
  The name "claude-security" uses the reserved word claude. Uploads to the Claude apps and API reject it. N5
  Fix: Choose a name without "anthropic" or "claude".
- Warning
  allowed-tools is a list; the spec defines a space-separated string. gh skill publish rejects a list, though Claude Code accepts one. O5
  Fix: Write it on one line: allowed-tools: Read Write Edit Glob Grep AskUserQuestion Workflow Workflow(claude-security:scan) Agent(claude-security:scan-inventory, claude-security:scan-researcher, claude-security:scan-verifier, claude-security…
- Warning
  Links to files that aren't in the skill folder: line 42: ${CLAUDE_SKILL_DIR}/jobs/scan-codebase.md, line 43: ${CLAUDE_SKILL_DIR}/jobs/scan-changes.md, line 44: ${CLAUDE_SKILL_DIR}/jobs/suggest-patches.md, line 51: ${CLAUDE_PLUGIN_ROOT}/scripts, line 52: ${CLAUDE_SKILL_DIR}/specs/report-spec.md and 1 more. B3
  Fix: Add the missing files or correct the paths, relative to SKILL.md.
- Note
  The first sentence of the description is 283 characters. Agents shorten long descriptions, so lead with the main job. D8
  Fix: Start with one short sentence that names the job.
- 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 over 100 lines with no table of contents at the top: jobs/scan-changes.md (147 lines), jobs/scan-codebase.md (127 lines), jobs/suggest-patches.md (126 lines) and specs/report-spec.md (220 lines). B5
  Fix: Add a short list of the sections at the top of each.
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
  Links to files that aren't in the skill folder: line 42: ${CLAUDE_SKILL_DIR}/jobs/scan-codebase.md, line 43: ${CLAUDE_SKILL_DIR}/jobs/scan-changes.md, line 44: ${CLAUDE_SKILL_DIR}/jobs/suggest-patches.md, line 51: ${CLAUDE_PLUGIN_ROOT}/scripts, line 52: ${CLAUDE_SKILL_DIR}/specs/report-spec.md and 1 more. B3
  Fix: Add the missing files or correct the paths, relative to SKILL.md.
- Note
  The name "claude-security" uses the reserved word claude. Claude Code loads it, but uploading it to claude.ai or the Claude API fails. N5
  Fix: Choose a name without "anthropic" or "claude".
- Note
  The first sentence of the description is 283 characters. Agents shorten long descriptions, so lead with the main job. D8
  Fix: Start with one short sentence that names the job.
- Note
  Reference files over 100 lines with no table of contents at the top: jobs/scan-changes.md (147 lines), jobs/scan-codebase.md (127 lines), jobs/suggest-patches.md (126 lines) and specs/report-spec.md (220 lines). B5
  Fix: Add a short list of the sections at the top of each.
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 name "claude-security" uses the reserved word claude. Anthropic's API docs don't allow "anthropic" or "claude" in skill names. N5
  Fix: Choose a name without "anthropic" or "claude".
- Warning
  Links to files that aren't in the skill folder: line 42: ${CLAUDE_SKILL_DIR}/jobs/scan-codebase.md, line 43: ${CLAUDE_SKILL_DIR}/jobs/scan-changes.md, line 44: ${CLAUDE_SKILL_DIR}/jobs/suggest-patches.md, line 51: ${CLAUDE_PLUGIN_ROOT}/scripts, line 52: ${CLAUDE_SKILL_DIR}/specs/report-spec.md and 1 more. B3
  Fix: Add the missing files or correct the paths, relative to SKILL.md.
- Note
  The description is 446 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.
- Note
  allowed-tools is a list; the spec defines a space-separated string. O5
  Fix: Write it on one line: allowed-tools: Read Write Edit Glob Grep AskUserQuestion Workflow Workflow(claude-security:scan) Agent(claude-security:scan-inventory, claude-security:scan-researcher, claude-security:scan-verifier, claude-security…
- Note
  Reference files over 100 lines with no table of contents at the top: jobs/scan-changes.md (147 lines), jobs/scan-codebase.md (127 lines), jobs/suggest-patches.md (126 lines) and specs/report-spec.md (220 lines). B5
  Fix: Add a short list of the sections at the top of each.
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
  Links to files that aren't in the skill folder: line 42: ${CLAUDE_SKILL_DIR}/jobs/scan-codebase.md, line 43: ${CLAUDE_SKILL_DIR}/jobs/scan-changes.md, line 44: ${CLAUDE_SKILL_DIR}/jobs/suggest-patches.md, line 51: ${CLAUDE_PLUGIN_ROOT}/scripts, line 52: ${CLAUDE_SKILL_DIR}/specs/report-spec.md and 1 more. B3
  Fix: Add the missing files or correct the paths, relative to SKILL.md.
- Note
  The first sentence of the description is 283 characters. Agents shorten long descriptions, so lead with the main job. D8
  Fix: Start with one short sentence that names the job.
- Note
  allowed-tools is a list; the spec defines a space-separated string. O5
  Fix: Write it on one line: allowed-tools: Read Write Edit Glob Grep AskUserQuestion Workflow Workflow(claude-security:scan) Agent(claude-security:scan-inventory, claude-security:scan-researcher, claude-security:scan-verifier, claude-security…
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
  Links to files that aren't in the skill folder: line 42: ${CLAUDE_SKILL_DIR}/jobs/scan-codebase.md, line 43: ${CLAUDE_SKILL_DIR}/jobs/scan-changes.md, line 44: ${CLAUDE_SKILL_DIR}/jobs/suggest-patches.md, line 51: ${CLAUDE_PLUGIN_ROOT}/scripts, line 52: ${CLAUDE_SKILL_DIR}/specs/report-spec.md and 1 more. B3
  Fix: Add the missing files or correct the paths, relative to SKILL.md.
- Note
  allowed-tools is a list; the spec defines a space-separated string. O5
  Fix: Write it on one line: allowed-tools: Read Write Edit Glob Grep AskUserQuestion Workflow Workflow(claude-security:scan) Agent(claude-security:scan-inventory, claude-security:scan-researcher, claude-security:scan-verifier, claude-security…

SKILL.md

Read SKILL.md on GitHub

Files

7 files

Path	Size
SKILL.md (opens in a new tab)	5.4 KB
jobs/scan-changes.md (opens in a new tab)	32.1 KB
jobs/scan-codebase.md (opens in a new tab)	28 KB
jobs/suggest-patches.md (opens in a new tab)	31.7 KB
role.md (opens in a new tab)	10.4 KB
specs/patch-spec.md (opens in a new tab)	11.2 KB
specs/report-spec.md (opens in a new tab)	14.5 KB

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All skills in anthropics/claude-plugins-official

Other Security skills

Same category, most repo stars first.

Skill	What it can touch	Pattern check	Licence	Updated
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agent-security-hardeningSecurity hardening guidance for AI agent frameworks that process untrusted content, invoke tools, write workspace files, manage runtime identifiers, or handle credentials. Use when building or reviewing an agent runtime, autonomous worker, tool gateway, memory service, or multi-tenant agent deployment. Do not use for general web application security or offensive testing. affaan-m/ECC Instructions only Pattern check: Nothing flaggedMITUpdated 9 Oct 2026	Instructions only	Pattern check: Nothing flagged	MIT	9 Oct 2026
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At a glance

What it can touch

Pattern check

Install

Claude Code

Claude apps

Codex

Cursor

Copilot & VS Code

Gemini CLI

Any agent

What it can touch

Pattern check

Outside links we did not follow

Format check

SKILL.md

Files

More from anthropics/claude-plugins-official

Other Security skills