security-review

A code-safety checklist for features that handle logins, user data, secrets, API endpoints, payments, or other sensitive information.

In plain words
What is it for?
Use it when adding authentication, validating forms or file uploads, creating API endpoints, managing credentials, or handling payments and sensitive data.
Why use it?
It helps prevent common security mistakes, such as putting passwords in source code or accepting unsafe input.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/codelably/harmony-claude-code/security-review
Any agent
npx skills add codelably/harmony-claude-code --skill security-review
Clone the repo
git clone --depth 1 https://github.com/codelably/harmony-claude-code

Made for: Claude Code, Codex.

Per session 36 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,591 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00036 $0.03591
Opus 5 $0.00018 $0.01795
Sonnet 5 $0.00007 $0.00718
Haiku 4.5 $0.00004 $0.00359

Measured 2d ago against content hash fd15ad46637f, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

security-review scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

docs/zh-TW/skills/security-review/SKILL.md · 495 lines

How it starts

The opening of the file, as written. The whole thing — 495 lines — stays where its author put it; the contents beside it link to each section on GitHub.

安全性審查技能

此技能確保所有程式碼遵循安全性最佳實務並識別潛在漏洞。

何時啟用

  • 實作認證或授權
  • 處理使用者輸入或檔案上傳
  • 建立新的 API 端點
  • 處理密鑰或憑證
  • 實作支付功能
  • 儲存或傳輸敏感資料
  • 整合第三方 API

安全性檢查清單

1. 密鑰管理

❌ 絕不這樣做
const apiKey = "sk-proj-xxxxx"  // 寫死的密鑰
const dbPassword = "password123" // 在原始碼中
✅ 總是這樣做
const apiKey = process.env.OPENAI_API_KEY
const dbUrl = process.env.DATABASE_URL

// 驗證密鑰存在
if (!apiKey) {
  throw new Error('OPENAI_API_KEY not configured')
}
驗證步驟
  • 無寫死的 API 金鑰、Token 或密碼
  • 所有密鑰在環境變數中
  • .env.local 在 .gitignore 中
  • git 歷史中無密鑰
  • 生產密鑰在託管平台(Vercel、Railway)中

2. 輸入驗證

總是驗證使用者輸入
import { z } from 'zod'

// 定義驗證 schema
const CreateUserSchema = z.object({
  email: z.string().email(),
  name: z.string().min(1).max(100),
  age: z.number().int().min(0).max(150)
})

// 處理前驗證
export async function createUser(input: unknown) {
  try {
    const validated = CreateUserSchema.parse(input)
    return await db.users.create(validated)
  } catch (error) {
    if (error instanceof z.ZodError) {
      return { success: false, errors: error.errors }
    }
    throw error
  }
}
檔案上傳驗證
function validateFileUpload(file: File) {
  // 大小檢查(最大 5MB)
  const maxSize = 5 * 1024 * 1024
  if (file.size > maxSize) {
    throw new Error('File too large (max 5MB)')
  }

  // 類型檢查
  const allowedTypes = ['image/jpeg', 'image/png', 'image/gif']
  if (!allowedTypes.includes(file.type)) {
    throw new Error('Invalid file type')
  }

  // 副檔名檢查
  const allowedExtensions = ['.jpg', '.jpeg', '.png', '.gif']
  const extension = file.name.toLowerCase().match(/\.[^.]+$/)?.[0]
  if (!extension || !allowedExtensions.includes(extension)) {
    throw new Error('Invalid file extension')
  }

  return true
}
驗證步驟
  • 所有使用者輸入以 schema 驗證
  • 檔案上傳受限(大小、類型、副檔名)
  • 查詢中不直接使用使用者輸入
  • 白名單驗證(非黑名單)
  • 錯誤訊息不洩露敏感資訊

3. SQL 注入預防

❌ 絕不串接 SQL
// 危險 - SQL 注入漏洞
const query = `SELECT * FROM users WHERE email = '${userEmail}'`
await db.query(query)

Read the full file on GitHub · 495 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 495 lines · 36 tokens per session scan A fd15ad46637f

Subscribe to this mod's changes

security-review is a skill published in the GitHub repository codelably/harmony-claude-code (42 stars, last pushed 6mo ago), licensed MIT. It adds 36 tokens to every session and 3,591 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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