Security Analyzer
aiskillstore/marketplace
Comprehensive security vulnerability analysis for codebases and infrastructure.
Security guidelines for writing secure code. An agent skill from semgrep/skills.
Install Code Security
$ npx skills add semgrep/skills --skill code-security -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install semgrep/skills code-security --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/semgrep/skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/code-security .claude/skills/code-security && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "code-security" agent skill from https://github.com/semgrep/skills/tree/main/skills/code-security into .claude/skills/code-security/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "code-security", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/semgrep/skills/tree/main/skills/code-securityType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add semgrep/skills --skill code-security -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install semgrep/skills code-security --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/semgrep/skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/code-security .agents/skills/code-security && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "code-security" agent skill from https://github.com/semgrep/skills/tree/main/skills/code-security into .agents/skills/code-security/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "code-security", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add semgrep/skills --skill code-security -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install semgrep/skills code-security --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/semgrep/skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/code-security .cursor/skills/code-security && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "code-security" agent skill from https://github.com/semgrep/skills/tree/main/skills/code-security into .cursor/skills/code-security/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "code-security", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/semgrep/skills.git --path skills/code-security--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add semgrep/skills --skill code-security -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install semgrep/skills code-security --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/semgrep/skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/code-security .gemini/skills/code-security && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "code-security" agent skill from https://github.com/semgrep/skills/tree/main/skills/code-security into .gemini/skills/code-security/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "code-security", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install semgrep/skills code-securityInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add semgrep/skills --skill code-security -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/semgrep/skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/code-security .github/skills/code-security && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "code-security" agent skill from https://github.com/semgrep/skills/tree/main/skills/code-security into .github/skills/code-security/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "code-security", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add semgrep/skills --skill code-security -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install semgrep/skills code-security --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/semgrep/skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/code-security .opencode/skills/code-security && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "code-security" agent skill from https://github.com/semgrep/skills/tree/main/skills/code-security into .opencode/skills/code-security/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "code-security", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
code-security- GitHub stars
- 322
- Token cost
- ~1.2k tokens
- SKILL.md length
- 467 words
- Files
- 34
- Skills in repo
- 2
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
Security guidelines for writing secure code. An agent skill from semgrep/skills.
- Works in 4 steps: Identify the language and what the code… → Check the relevant rules below — focus… → Read the specific rule file from rules/… → …
- Reviewing code for vulnerabilities
- SKILL.md covers How to Use This Skill, Language-Specific Priority Rules, Categories and Quick Reference
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Code Security is an agent skill from semgrep/skills, published by the product's own GitHub organization. Security guidelines for writing secure code. Use when writing code, reviewing code for vulnerabilities, or asking about secure coding practices like 'check for SQL injection' or 'review security'. IMPORTANT: Always consult this skill when writing or reviewing any code that handles user input, authentication, file operations, database queries, network requests, cryptography, or infrastructure configuration (Terraform, Kubernetes, Docker, GitHub Actions) — even if the user doesn't explicitly mention security. Also…
Its SKILL.md is about 1.2k tokens, which your agent loads only when the skill is triggered. The skill folder holds 34 other files (for example `AGENTS.md`, `README.md` and `metadata.json`).
It sits in Security, covering Web application vulnerabilities, Security review and Infrastructure as code. It works with Docker, GitHub Actions, Kubernetes and Terraform. The repository describes itself as: A collection of skills for AI coding agents from Semgrep.
When your agent uses it
- Reviewing code for vulnerabilities
- Asking about secure coding practices like check for SQL injection
- Review security
- Users ask to review my code
Example prompts
- “check for SQL injection”
- “review security”
- “t explicitly mention security. Also use when users ask to”
- “/code-security”
Requirements
- Docker
Workflow steps
4 steps, taken from the first numbered list in SKILL.md.
- Identify the language and what the code does (handles input? queries a DB? reads files?)
- Check the relevant rules below — focus on Critical and High impact first
- Read the specific rule file from rules/ for detailed code examples in that language
- Apply the secure patterns, or flag the vulnerable patterns if reviewing
What it can do on your machine
Read from SKILL.md and the folder at commit 68177b8. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Code Security loads about 1.2k tokens when it runs. Until then it costs about 153 tokens; SKILL.md has 467 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 467 words (~1,249 tokens).
“Comprehensive security rules for writing secure code across 15+ languages. Covers OWASP Top 10, infrastructure security, and coding best practices with 28 rule categories.”
- name
- code-security
Files
SKILL.md and 33 other files in skills/code-security of semgrep/skills.
- SKILL.md
- AGENTS.md
- README.md
- metadata.json
- rules/_sections.md
- rules/_template.md
- rules/authentication-jwt.md
- rules/best-practice.md
- rules/code-injection.md
- rules/command-injection.md
- rules/correctness.md
- rules/csrf.md
- rules/docker.md
- rules/github-actions.md
- rules/insecure-crypto.md
- rules/insecure-deserialization.md
- rules/insecure-transport.md
- rules/kubernetes.md
- rules/maintainability.md
- rules/memory-safety.md
- … and 14 more
Open the folder on GitHubat commit 68177b8
Compare with similar skills
Code Security next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Code Security this skillsemgrep/skills | 322 | — | ~1.2k | Automated safety check: Pass | Custom licence | |
| Security Analyzeraiskillstore/marketplace | 430 | — | ~1.2k | Automated safety check: Notes | None | |
| Devops Excellencemajiayu000/spellbook | 286 | — | ~2.4k | Automated safety check: Notes | MIT | |
| Devops Deploymentyonatangross/orchestkit | 288 | — | ~2.7k | Automated safety check: Pass | MIT | |
| Devops EngineerYikai-Liao/symusic | 189 | 1 repos | ~1.5k | Automated safety check: Pass | MIT | |
| Senior DevOps Toolkitmaslennikov-ig/claude-code-orchestrator-kit | 259 | 6 repos | ~1.1k | Automated safety check: Notes | Custom licence |
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Related
Works with
Categories
Questions about Code Security
What does Code Security do?
Security guidelines for writing secure code. An agent skill from semgrep/skills. Code Security is an agent skill from semgrep/skills, published by the product's own GitHub organization. Security guidelines for writing secure code.
When should I use Code Security?
Code Security fits situations like: reviewing code for vulnerabilities; asking about secure coding practices like check for SQL injection; review security; users ask to review my code.
How do I install Code Security in Claude Code?
Run `npx skills add semgrep/skills --skill code-security -a claude-code`. Or copy the skill folder (skills/code-security in semgrep/skills) into .claude/skills/code-security in your project. Claude Code loads it when a task matches its description.
How do I install Code Security in Codex?
Run `npx skills add semgrep/skills --skill code-security -a codex`. Or copy the skill folder (skills/code-security in semgrep/skills) into .agents/skills/code-security in your project. Codex loads it when a task matches its description.
Can I use Code Security in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add semgrep/skills --skill code-security -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/code-security, .gemini/skills/code-security, .github/skills/code-security and .opencode/skills/code-security in your project.
What does Code Security need to run?
SKILL.md names no scripts, command-line tools or credentials: Code Security is instructions for the agent only. Our summary lists: Docker.
Does Code Security access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Code Security safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Code Security use?
Code Security has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.
How many tokens does Code Security use?
About 1.2k tokens (SKILL.md is roughly 5k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Code Security?
Skills that share tags, products or a category with Code Security: Security Analyzer (aiskillstore/marketplace, 430 stars), Devops Excellence (majiayu000/spellbook, 286 stars), Devops Deployment (yonatangross/orchestkit, 288 stars) and Devops Engineer (Yikai-Liao/symusic, 189 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Code Security?
semgrep (a GitHub organization, an official publisher) maintains it in semgrep/skills, which has 322 GitHub stars. The repository holds 2 skills in this directory. The repository was last updated on July 28, 2026.
Source: semgrep/skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.