macos-reverse

macos-reverse is a skill for Claude Code, Codex from Asaiuta/reverse-workbench-skill. It costs 35 tokens per session (571 once invoked), scanned A, a copy of macos-reverse, MIT.

A guide for reverse engineering macOS applications and Mach-O files, the executable format used by Apple platforms. It covers code signing, Objective-C and Swift programs, system services, and runtime behavior.

In plain words
What is it for?
Use it to inspect app bundles and libraries, review signatures and dependencies, recover Objective-C or Swift structure, trace sensitive system behavior, and analyze macOS malware.
Why use it?
It helps when a macOS program must be understood without source code, including software that uses Apple security controls or behaves like malware. Combining file inspection with runtime observation exposes both structure and activity.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to inspect app bundles and libraries, review signatures and dependencies, recover Objective-C or Swift structure, trace sensitive system behavior, and analyze macOS malware.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/asaiuta/reverse-workbench-skill/macos-reverse
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.

Any agent
npx skills add Asaiuta/reverse-workbench-skill --skill macos-reverse
Clone the repo
git clone --depth 1 https://github.com/Asaiuta/reverse-workbench-skill

Made for: Claude Code, Codex.

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 macos-reverse

README.md
[![agentmods](https://agentmods.dev/badge/skills/asaiuta/reverse-workbench-skill/macos-reverse.svg)](https://agentmods.dev/skills/asaiuta/reverse-workbench-skill/macos-reverse)
Your own site
<a href="https://agentmods.dev/skills/asaiuta/reverse-workbench-skill/macos-reverse"><img src="https://agentmods.dev/badge/skills/asaiuta/reverse-workbench-skill/macos-reverse.svg" alt="Measured on agentmods" height="20"></a>
Per session 35 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 571 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 100% copy Near-identical to another mod 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 $0.00035 $0.00571
Opus 5 $0.00017 $0.00285
Sonnet 5 $0.00007 $0.00114
Haiku 4.5 $0.00003 $0.00057

Measured 3d ago against content hash 727633a83f01, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

macos-reverse 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 3d 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.

Origin

This is a copy

100% identical to macos-reverse — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

skills/macos-reverse/SKILL.md · 74 lines

What it actually says

macOS / Mach-O Reverse Engineering

ACTION REQUIRED(读完后立刻执行)

  1. NOW: 读取 ../field-journal/precedent-reverse.md
  2. NOW: 确认目标为 macOS/Mach-O/App bundle(iOS IPA → mobile-reverse/
  3. NEXT: tool-index;jtool2/lldb 等
  4. ACT: 签名与装载信息 → 静态 → 动态(lldb/Frida)

适用场景

  • Mach-O 可执行文件 / dylib / framework
  • .app bundle、LaunchAgent/Daemon
  • Objective-C / Swift 符号与 runtime
  • 公证/签名、Hardened Runtime、TCC 相关行为分析
  • macOS 恶意软件静态/动态分析(联合 malware-analysis)

工作流

1. 包体与签名

file target
codesign -dv --verbose=4 target
spctl -a -vv target 2>&1
otool -L target

2. 静态

□ class-dump / swift-demangle / Hopper / Ghidra / IDA
□ 字符串与 XPC 服务名、TCC 敏感 API
□ LC_LOAD_dylib 依赖与 rpath

3. 动态

□ lldb / Frida
□ fs_usage / log stream 观察
□ 网络:联合 protocol-reverse 或代理

工具链

工具 用途
otool / nm / codesign 系统自带
Hopper / Ghidra / IDA 反编译
class-dump / dsdump ObjC
Frida / lldb 动态
jtool2 Mach-O

参考

  • references/macho-triage.md
  • ../mobile-reverse/(iOS) ../ghidra-reverse/ ../malware-analysis/

路由上下文

上游: MASTER R31
下游: iOS → mobile-reverse;通用样本 → malware-analysis

任务完成自检

  • 是否记录签名/Hardened Runtime 状态?
  • 是否有地址级/符号级结论?
  • Checklist?
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. 3d ago First seen · 74 lines · 35 tokens per session scan A 727633a83f01

Subscribe to this mod's changes

macos-reverse is a skill published in the GitHub repository Asaiuta/reverse-workbench-skill (2 stars, last pushed 23d ago), licensed MIT. It adds 35 tokens to every session and 571 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to macos-reverse, differing in 0 lines, and is treated as a copy.

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