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everything-react-native-expo: Skill for Claude Code

.claude/skills/security-review/SKILL.md

security-review is a skill for Claude Code from JubaKitiashvili/everything-react-native-expo. It costs 10 tokens per session (680 once invoked), scanned A, original, MIT.

A security-audit workflow for React Native mobile applications. It checks local storage, network traffic, authentication, secrets, and platform protections such as iOS Keychain, Android Keystore, and secure Expo storage.

In plain words
What is it for?
Use it before production deployment, after adding login or payments, during sensitive code review, or for a recurring mobile security check.
Why use it?
It helps find common ways sensitive data or credentials can be exposed before release or after security-sensitive changes. The checklist also covers token expiry, logout, HTTPS, and certificate pinning.

Skill for Claude Code

Written for Claude Code: installed under .claude/.

This is JubaKitiashvili/everything-react-native-expo's own configuration. It tells Claude Code how to work on everything-react-native-expo itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything everything-react-native-expo configures →

Part of the erne-universal plugin — 45 skills, 12 agents shipped together

not rated 45repo +1 5mo ago A scan 10 tokens original MIT
View source ↗ JubaKitiashvili/everything-react-native-expo erne.dev
Reuse

Borrowing it

Nothing to install: this file belongs to JubaKitiashvili/everything-react-native-expo. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/JubaKitiashvili/everything-react-native-expo/main/.claude/skills/security-review/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/JubaKitiashvili/everything-react-native-expo

Made for: Claude Code.

Or install erne-universal, the plugin that ships this one along with the rest of its 45 skills, 12 agents.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for security-review

README.md
[![agentmods](https://agentmods.dev/badge/skills/jubakitiashvili/everything-react-native-expo/security-review/github.svg)](https://agentmods.dev/skills/jubakitiashvili/everything-react-native-expo/security-review)
Your own site
<a href="https://agentmods.dev/skills/jubakitiashvili/everything-react-native-expo/security-review"><img src="https://agentmods.dev/badge/skills/jubakitiashvili/everything-react-native-expo/security-review/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for security-review

Your own site · 80×15
<a href="https://agentmods.dev/skills/jubakitiashvili/everything-react-native-expo/security-review"><img src="https://agentmods.dev/badge/skills/jubakitiashvili/everything-react-native-expo/security-review.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 10 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 680 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.00010 $0.00680
Opus 5 $0.00005 $0.00340
Sonnet 5 $0.00002 $0.00136
Haiku 4.5 $0.00001 $0.00068

Measured 12d ago against content hash 3b2d36c77205, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, 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 12d 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.

.claude/skills/security-review/SKILL.md · 100 lines

How it starts

The opening of the file, as written. The whole thing — 100 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Security Review

You are performing a security audit on a React Native application. This skill provides a systematic security checklist specific to mobile apps.

When to Use This Skill

Invoke when:

  • Before deploying to production
  • After adding authentication or payment features
  • During code review of sensitive features
  • Periodically as a security health check

Audit Categories

1. Data Storage Security

  • Sensitive data uses expo-secure-store (Expo) or Keychain/Keystore (bare)
  • No sensitive data in AsyncStorage (it's unencrypted)
  • No secrets in source code or environment files committed to git
  • .env is in .gitignore
  • API keys use EAS Secrets for builds (not hardcoded)

2. Network Security

  • All API calls use HTTPS
  • Certificate pinning implemented for sensitive endpoints
  • Auth tokens stored securely, not in plain AsyncStorage
  • Token refresh logic handles expiration correctly
  • No sensitive data in URL query parameters

3. Authentication & Authorization

  • Passwords never stored locally
  • Biometric auth uses platform APIs (FaceID, fingerprint)
  • Session tokens have reasonable expiry
  • Logout clears all sensitive cached data
  • Deep links validate auth state before navigating

4. Code Security

  • No eval() or dynamic code execution
  • WebView javaScriptEnabled only when necessary
  • Input validation on all user inputs
  • SQL injection prevention (parameterized queries)
  • No debug logging of sensitive data

5. Build Security

  • ProGuard/R8 enabled for Android release builds
  • iOS binary stripped in release
  • Source maps not included in production bundles
  • App Transport Security (ATS) properly configured (iOS)
  • Android networkSecurityConfig restricts cleartext traffic

6. Platform-Specific

iOS:

  • Privacy Manifest (iOS 17+) includes required reasons
  • Keychain access group properly configured
  • No private API usage
  • Background fetch/processing doesn't leak data

Read the full file on GitHub · 100 lines

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. 12d ago First seen · 100 lines · 10 tokens per session scan A 3b2d36c77205

Subscribe to this mod's changes

security-review is a skill published in the GitHub repository JubaKitiashvili/everything-react-native-expo (45 stars, last pushed 5mo ago), licensed MIT. It adds 10 tokens to every session and 680 once invoked, about $0.0001 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.

MobileSecurity
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