Semgrep Security Scan
trailofbits/skills
Detects languages, proposes rulesets for approval, then runs the approved Semgrep scan across a codebase and merges the output into one SARIF file.
A skill your agent uses for authorized source-code security review and SAST workflows including Semgrep, CodeQL patterns, dangerous API hunting, and fix verification.
Install Code Audit
The automated check flagged lines worth reading first. See the safety section below.
$ npx skills add zhaoxuya520/reverse-skill --skill code-audit -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install zhaoxuya520/reverse-skill code-audit --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/zhaoxuya520/reverse-skill.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/code-audit .claude/skills/code-audit && 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-audit" agent skill from https://github.com/zhaoxuya520/reverse-skill/tree/main/skills/code-audit into .claude/skills/code-audit/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "code-audit", 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/zhaoxuya520/reverse-skill/tree/main/skills/code-auditType 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 zhaoxuya520/reverse-skill --skill code-audit -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install zhaoxuya520/reverse-skill code-audit --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/zhaoxuya520/reverse-skill.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/code-audit .agents/skills/code-audit && 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-audit" agent skill from https://github.com/zhaoxuya520/reverse-skill/tree/main/skills/code-audit into .agents/skills/code-audit/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "code-audit", 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 zhaoxuya520/reverse-skill --skill code-audit -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install zhaoxuya520/reverse-skill code-audit --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/zhaoxuya520/reverse-skill.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/code-audit .cursor/skills/code-audit && 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-audit" agent skill from https://github.com/zhaoxuya520/reverse-skill/tree/main/skills/code-audit into .cursor/skills/code-audit/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "code-audit", 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/zhaoxuya520/reverse-skill.git --path skills/code-audit--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 zhaoxuya520/reverse-skill --skill code-audit -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install zhaoxuya520/reverse-skill code-audit --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/zhaoxuya520/reverse-skill.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/code-audit .gemini/skills/code-audit && 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-audit" agent skill from https://github.com/zhaoxuya520/reverse-skill/tree/main/skills/code-audit into .gemini/skills/code-audit/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "code-audit", 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 zhaoxuya520/reverse-skill code-auditInstalls 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 zhaoxuya520/reverse-skill --skill code-audit -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/zhaoxuya520/reverse-skill.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/code-audit .github/skills/code-audit && 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-audit" agent skill from https://github.com/zhaoxuya520/reverse-skill/tree/main/skills/code-audit into .github/skills/code-audit/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "code-audit", 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 zhaoxuya520/reverse-skill --skill code-audit -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install zhaoxuya520/reverse-skill code-audit --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/zhaoxuya520/reverse-skill.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/code-audit .opencode/skills/code-audit && 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-audit" agent skill from https://github.com/zhaoxuya520/reverse-skill/tree/main/skills/code-audit into .opencode/skills/code-audit/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "code-audit", 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-audit- GitHub stars
- 40k
- Used in
- 2 other repos
- Token cost
- ~374 tokens
- SKILL.md length
- 91 words
- Files
- 2 (incl. references)
- Skills in repo
- 19
- Repo updated
- First seen
- Licence
- MIT
At a glance
A skill your agent uses for authorized source-code security review and SAST workflows including Semgrep, CodeQL patterns, dangerous API hunting, and fix verification.
- Works in 4 steps: 范围与威胁模型 → 自动扫描 → 人工验证（MUST） → …
- Authorized source-code security review and SAST workflows including Semgrep
- SKILL.md covers ACTION REQUIRED（读完后立刻执行）, 适用场景, 工作流 and 工具链, plus 3 more sections
- Calls semgrep
What it does
Code Audit is an agent skill from zhaoxuya520/reverse-skill. Use for authorized source-code security review and SAST workflows including Semgrep, CodeQL patterns, dangerous API hunting, and fix verification.
Its SKILL.md is about 370 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files, including reference files (for example `references/sast-review-checklist.md`).
It sits in Security, covering Static analysis and SAST and Security review. It works with Semgrep. The repository describes itself as: Reverse Engineering / Authorized Penetration Testing / Security Research Skill Router Pack AI-powered routing + On-demand toolchain bootstrapping + Self-evolving knowledge base…. The licence is MIT.
When your agent uses it
- Authorized source-code security review and SAST workflows including Semgrep
- CodeQL patterns
- Dangerous API hunting
- Fix verification
Example prompts
- “/code-audit”
Requirements
- Python 3
Workflow steps
4 steps, taken from the step headings in SKILL.md.
What it can do on your machine
Read from SKILL.md and the folder at commit cab634b. 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
Shell commands in SKILL.md call:
semgrep
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 Audit loads about 374 tokens when it runs, and up to ~452 if it reads all its reference files. Until then it costs about 39 tokens; SKILL.md has 91 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: warnings
The automated check found patterns that need a careful read before installing.
- WarningTells the agent its actions are pre-authorized / not to stop for confirmationSKILL.md:10
ield-journal/precedent-pentest.md` 或代码审计授权
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
The full file from zhaoxuya520/reverse-skill at commit cab634b, republished under its MIT licence (© zhaoxuya520). 91 words, ~374 tokens.
Download SKILL.mdSave it as
.claude/skills/code-audit/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.- name
- code-audit
- description
- Use for authorized source-code security review and SAST workflows including Semgrep, CodeQL patterns, dangerous API hunting, and fix verification.
Source Code Security Audit
ACTION REQUIRED（读完后立刻执行）
NOW: 读取../field-journal/precedent-pentest.md或代码审计授权NOW: 确认有源码/仓库访问（无源码二进制 → 转 RE skill）NOW: 明确语言栈与范围（目录/服务/PR diff）NEXT: tool-index；semgrep 等ACT: 威胁建模草图 → 自动扫描 → 人工验证
适用场景
- 白盒审计、PR/差分安全审查
- Semgrep / CodeQL / Bandit / gosec 等 SAST
- 危险 API、注入点、鉴权缺失、加密误用
- 与
supply-chain-security/分工：本 skill 偏自有代码逻辑，供应链偏依赖与管道
工作流
1. 范围与威胁模型
□ 信任边界：用户输入、文件、反序列化、SSRF、鉴权中间件
□ 高价值资产：鉴权、支付、管理端、密钥处理2. 自动扫描
semgrep --config auto .
# 或项目规则包
semgrep --config p/owasp-top-ten .3. 人工验证（MUST）
□ 每个 SAST 命中：可达性？可利用性？误报？
□ 鉴权：IDOR/越权、缺校验、错误的多租户隔离
□ 注入：SQL/命令/模板/LDAP
□ 加密：硬编码密钥、ECB、自定义 crypto4. 产出
Finding：位置 + 数据流 + PoC + 修复建议
可选 ATT&CK / CWE 编号工具链
| 工具 | 语言/场景 |
|---|---|
| Semgrep | 多语言快速规则 |
| CodeQL | 深数据流（GitHub） |
| Bandit | Python |
| gosec / staticcheck | Go |
| SpotBugs / FindSecBugs | Java |
参考
references/sast-review-checklist.md../supply-chain-security/../api-security/../llm-security/（Agent 代码）
路由上下文
上游: MASTER R26
角色: ops/role-map.md cae
下游: 依赖漏洞 → supply-chain；运行时验证 → pentest-tools
任务完成自检
- 是否人工验证而非只贴扫描器输出？
- 是否含修复建议？
- 是否限定在授权仓库范围？
- Checklist？
© zhaoxuya520, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
SKILL.md and 1 other file (references) in skills/code-audit of zhaoxuya520/reverse-skill.
- SKILL.md
- references/sast-review-checklist.md
Open the folder on GitHubat commit cab634b
Used in 2 other repositories
We found 2 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 2 other GitHub owners. This page covers the copy in zhaoxuya520/reverse-skill, which our catalogue first saw on October 7, 2026.
Compare with similar skills
Code Audit 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 Audit this skillzhaoxuya520/reverse-skill | 40k | 2 repos | ~374 | Automated safety check: Warn | MIT | |
| Semgrep Security Scantrailofbits/skills | 7.4k | — | ~3.7k | Automated safety check: Notes | CC-BY-SA-4.0 | |
| Code Auditsickn33/agentic-awesome-skills | 47k | 1 repos | ~480 | Automated safety check: Pass | MIT | |
| Semgrepalpha-omega-security/scrutineer | 239 | — | ~439 | Automated safety check: Pass | MIT | |
| Warden Scanjeremylongshore/tons-of-skills-marketplace | 2.8k | — | ~750 | Automated safety check: Notes | MIT | |
| Kedro Security Reviewkedro-org/kedro | 11k | — | ~3.3k | Automated safety check: Pass | Custom licence |
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- Official
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Kedro Plugins Security Review
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Related
Works with
Categories
Questions about Code Audit
What does Code Audit do?
A skill your agent uses for authorized source-code security review and SAST workflows including Semgrep, CodeQL patterns, dangerous API hunting, and fix verification. Code Audit is an agent skill from zhaoxuya520/reverse-skill. Use for authorized source-code security review and SAST workflows including Semgrep, CodeQL patterns, dangerous API hunting, and fix verification.
When should I use Code Audit?
Code Audit fits situations like: authorized source-code security review and SAST workflows including Semgrep; codeQL patterns; dangerous API hunting; fix verification.
How do I install Code Audit in Claude Code?
Run `npx skills add zhaoxuya520/reverse-skill --skill code-audit -a claude-code`. Or copy the skill folder (skills/code-audit in zhaoxuya520/reverse-skill) into .claude/skills/code-audit in your project. Claude Code loads it when a task matches its description.
How do I install Code Audit in Codex?
Run `npx skills add zhaoxuya520/reverse-skill --skill code-audit -a codex`. Or copy the skill folder (skills/code-audit in zhaoxuya520/reverse-skill) into .agents/skills/code-audit in your project. Codex loads it when a task matches its description.
Can I use Code Audit 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 zhaoxuya520/reverse-skill --skill code-audit -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-audit, .gemini/skills/code-audit, .github/skills/code-audit and .opencode/skills/code-audit in your project.
What does Code Audit need to run?
Going by SKILL.md and its folder, Code Audit needs the command-line tools its instructions call (semgrep). Our summary lists: Python 3.
Does Code Audit 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 Audit safe to install?
Our automated static check of SKILL.md flagged 1 warning(s): tells the agent its actions are pre-authorized / not to stop for confirmation. Read the flagged lines before installing; the check is not a guarantee either way.
What licence does Code Audit use?
Code Audit is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Code Audit use?
About 374 tokens (SKILL.md is roughly 1.5k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 78 tokens, read only when the agent opens those files.
What are the alternatives to Code Audit?
Skills that share tags, products or a category with Code Audit: Semgrep Security Scan (trailofbits/skills, 7.4k stars), Code Audit (sickn33/agentic-awesome-skills, 47k stars), Semgrep (alpha-omega-security/scrutineer, 239 stars) and Warden Scan (jeremylongshore/tons-of-skills-marketplace, 2.8k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Code Audit?
zhaoxuya520 (a GitHub user) maintains it in zhaoxuya520/reverse-skill, which has 40,325 GitHub stars. The repository holds 19 skills in this directory. The repository was last updated on September 22, 2026.
Source: zhaoxuya520/reverse-skill on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.