What is re-ios CLAUDE.md?

A set of Claude Code instructions for re-ios, an MCP server for examining and instrumenting iOS applications. It covers static analysis of IPA and Mach-O files and live analysis with Frida, a runtime inspection tool.

Analyzing iOS app packages, Objective-C and Swift code, frameworks, encryption, runtime classes, in-app purchases, network traffic, and FairPlay protection.

It gives the coding agent project-specific guidance for handling the repository and its iOS analysis tools.

How gyh20062008-commits/re-ios configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to gyh20062008-commits/re-ios. 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/gyh20062008-commits/re-ios/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/gyh20062008-commits/re-ios

Made for: Claude Code.

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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/gyh20062008-commits/re-ios/claude-md/github.svg)](https://agentmods.dev/instructions/gyh20062008-commits/re-ios/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/gyh20062008-commits/re-ios/claude-md"><img src="https://agentmods.dev/badge/instructions/gyh20062008-commits/re-ios/claude-md/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/gyh20062008-commits/re-ios/claude-md"><img src="https://agentmods.dev/badge/instructions/gyh20062008-commits/re-ios/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 988 This file is loaded in full into every session.

When invoked 988 The same file — it is already loaded in full.

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.

Model	Per session	Once invoked
Fable 5.1	$0.00988	$0.00988
Opus 5.5	$0.00395	$0.00395
Sonnet 5.5	$0.00198	$0.00198
Haiku 4.5	$0.00099	$0.00099

Measured 2mo ago against content hash 0c9be4825184, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

re-ios CLAUDE.md 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 2mo 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.md · 129 lines

How it starts

The opening of the file, as written. The whole thing — 129 lines — stays where its author put it; the contents beside it link to each section on GitHub.

re-ios v0.2.0

MCP server for iOS reverse engineering: static analysis (IPA, Mach-O, ObjC, Swift) + dynamic instrumentation (Frida: IAP hook, network intercept, FairPlay decryption).

Structure

re-ios/
  src/re_ios/
    server.py              # FastMCP app — 27 tools
    models.py              # Pydantic models
    errors.py              # Exception hierarchy
    logger.py              # Logging
    macho/parser.py        # Mach-O static analysis (ObjC, Swift, frameworks, archs, encryption)
    frida/
      device.py            # Device/process management
      session.py           # Script injection & RPC
      scripts/
        enumerate_classes.js   # Runtime ObjC enumeration
        dump_ipa.js            # FairPlay cryptid detection
        hook_iap.js            # StoreKit IAP hook
        hook_network.js        # NSURLSession/CFNetwork hook
    ipa/
      unpack.py            # IPA parse, extract, entitlements
      decrypt.py           # FairPlay decryption orchestration
    analysis/
      static.py            # Report generation & endpoint scanning
      dynamic.py           # Dynamic analysis orchestration
  pyproject.toml

Tools (31 total)

System

check_ios — server status & capability report

IPA Analysis

parse_ipa_tool — full IPA metadata extraction
unpack_ipa_tool — extract IPA to directory
get_ipa_entitlements — extract entitlements

Mach-O Static Analysis

analyze_macho_objc — ObjC class dump (nm+strings)
analyze_macho_objc_deep — ObjC class dump (class-dump, fallback to nm)
analyze_swift_symbols — Swift symbol demangling
analyze_linked_frameworks — linked libs/frameworks enumeration
check_macho_encryption — cryptid / FairPlay detection
analyze_macho_archs — architecture listing
full_static_analysis — all-of-the-above pipeline

Frida Device Management

frida_list_devices — list USB/local/remote devices
frida_device_info — device details
frida_list_processes — running processes
frida_find_process — find PID by name or bundle ID
frida_spawn_app — spawn app by bundle ID
frida_resume_app — resume spawned process
frida_kill_app — kill process

Read the full file on GitHub · 129 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.

2mo ago First seen · 129 lines · 988 tokens per session scan A 0c9be4825184

Subscribe to this mod's changes

re-ios CLAUDE.md is an instructions file published in the GitHub repository gyh20062008-commits/re-ios (3 stars, last pushed 4mo ago), licensed MIT. It adds 988 tokens to every session, about $0.0040 per session on Opus 5.5. 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 2026-08-31.

Debugging Mobile

re-ios CLAUDE.md next to 6 instructions from other repositories
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re-ios: Instructions file for Claude Code