re-apk

re-apk is a skill for Claude Code from dslsdzc/rev-skills. It costs 45 tokens per session (3,795 once invoked), scanned A, original, Apache-2.0.

A guide to examining an Android application package (APK) without running it. It covers the app manifest, decompiled Java code, resources, permissions, components, and signs of packing or obfuscation.

In plain words
What is it for?
Use it to inspect APK files with tools such as jadx and apktool, review permissions and components, identify protection techniques, and prepare an app for deeper analysis.
Why use it?
It helps developers understand an Android app's contents and structure before deciding whether runtime analysis or unpacking is needed.

Skill for Claude Code

Written for Claude Code: installed under .claude/.

Good fit Use it to inspect APK files with tools such as jadx and apktool, review permissions and components, identify protection techniques, and prepare an app for deeper analysis.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/dslsdzc/rev-skills/re-apk
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 dslsdzc/rev-skills --skill re-apk
Clone the repo
git clone --depth 1 https://github.com/dslsdzc/rev-skills

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.

agentmods badge for re-apk

README.md
[![agentmods](https://agentmods.dev/badge/skills/dslsdzc/rev-skills/re-apk/github.svg)](https://agentmods.dev/skills/dslsdzc/rev-skills/re-apk)
Your own site
<a href="https://agentmods.dev/skills/dslsdzc/rev-skills/re-apk"><img src="https://agentmods.dev/badge/skills/dslsdzc/rev-skills/re-apk/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 re-apk

Your own site · 80×15
<a href="https://agentmods.dev/skills/dslsdzc/rev-skills/re-apk"><img src="https://agentmods.dev/badge/skills/dslsdzc/rev-skills/re-apk.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 45 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,795 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. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00045 $0.03795
Opus 5 $0.00023 $0.01898
Sonnet 5 $0.00009 $0.00759
Haiku 4.5 $0.00005 $0.00380

Measured 10d ago against content hash a8f90c07b331, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

re-apk 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 10d 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/re-apk/SKILL.md · 133 lines

How it starts

The opening of the file, as written. The whole thing — 133 lines — stays where its author put it; the contents beside it link to each section on GitHub.

APK 静态分析

何时使用 / 何时不用

  • 用:拿到 APK / 安卓应用包,需要看清单、Java 代码、资源、权限、组件结构
  • 用:需要识别加固 / 混淆(壳、资源混淆),为脱壳或补丁做准备
  • 不用:需要运行时 hook / 解密 / 绕过(走 [[re-frida]])
  • 不用:目标是原生库 .so 的逻辑(走 [[re-binary-core]] 的 [[re-format-elf]])
  • 不用:需要从运行时内存提取 DEX(走 [[re-memdump]])

工具准备

纯静态分析(解包 / 反编译)可免沙箱([[platform-tips]] 最高原则);涉及动态 / 脱壳转 [[re-frida]] / 脱壳域。所有工具先验证再使用。

jadx —— Java 反编译主力(含 JADX GUI)

  • 官方/GitHub release:https://github.com/skylot/jadx/releases 下载 jadx-<版本>.zip,解压后运行 bin/jadx(Linux/macOS)或 bin\jadx.bat(Windows);GUI 是 bin/jadx-gui
  • macOS: brew install jadx;Arch: pacman -S jadx
  • 依赖 Java 11+(官方要求 11+ 且 64 位):Linux apt install openjdk-17-jre / dnf install java-17-openjdk / pacman -S jre17-openjdk;macOS brew install openjdk
  • Windows/WSL: WSL 内用 Linux 版 zip
  • 验证: jadx --version;版本注——release zip 与 brew/pacman 包同步更新,以实测版本为准

apktool —— 解包 / 回编译(官方/GitHub release)

  • 依赖 Java 8+。官方 wrapper:从 https://github.com/iBotPeaches/Apktool/releases 下载 apktool_<版本>.jar 与 wrapper 脚本(Linux/macOS apktool、Windows apktool.bat),脚本与 jar 放同目录
  • Debian/Ubuntu: apt install apktool(仓库版较旧,命令行为兼容即可)
  • macOS: brew install apktool
  • Windows/WSL: WSL 内 Linux 版
  • 验证: apktool --version

aapt2 —— 资源转储 / 还原混淆资源

  • Android SDK build-tools 自带。安装 cmdline-tools 后:sdkmanager "build-tools;34.0.0",路径 $ANDROID_HOME/build-tools/34.0.0/aapt2
  • macOS: brew install --cask android-commandlinetoolssdkmanager "build-tools;34.0.0"
  • Windows: Android Studio → SDK Manager 勾选 build-tools
  • 验证: aapt2 version;版本注——build-tools 版本随 SDK 更新(示例 34.0.0,新版 SDK 自带更高版本),命令接口稳定,按已装版本使用即可

dex2jar(可选)—— dex → jar

  • GitHub release:https://github.com/pxb1988/dex2jar/releases 下载 zip,解压后 d2j-dex2jar.sh classes.dex 得 jar,再用 jd-gui 浏览
  • 需要 Java
  • 验证: d2j-dex2jar.sh --version

apksigner / keytool —— 重打包签名(smali 补丁配套)

  • apksigner 在 Android SDK build-tools(同 aapt2 路径);keytool 随 Java 自带
  • 验证: apksigner --versionkeytool -help

adb —— 设备安装 / 重打包闭环验证

  • Android SDK platform-tools 自带(sdkmanager "platform-tools"
  • Linux: apt install adb(Debian/Ubuntu);macOS: brew install --cask android-platform-tools;Arch: pacman -S android-tools
  • Windows: platform-tools zip 官方下载
  • 验证: adb version

Read the full file on GitHub · 133 lines

Files

What ships with it

2 files 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. 10d ago First seen · 133 lines · 45 tokens per session scan A a8f90c07b331

Subscribe to this mod's changes

re-apk is a skill published in the GitHub repository dslsdzc/rev-skills (52 stars, last pushed 12d ago), licensed Apache-2.0. It adds 45 tokens to every session and 3,795 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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