What is android-analysis?

Guidance for inspecting compiled Android and Java files, including APK, AAR, JAR, and DEX packages. Decompilation turns compiled code back into a readable approximation for analysis.

Use it to decompile apps and libraries, inspect manifests and resources, study obfuscated code, investigate integrations, or compare binary versions.

It helps select the right inspection tool and understand code, resources, app structure, or library behavior when the original source is unavailable.

android-analysis — Skill for Claude Code and Codex by and3r817: Guidance for inspecting compiled Android and Java files, including…

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/and3r817/dot-claude-plugins/android-analysis

Any agent

npx skills add and3r817/dot-claude-plugins --skill android-analysis

Clone the repo

git clone --depth 1 https://github.com/and3r817/dot-claude-plugins

Made for: Claude Code, Codex.

Or install android-analysis, the plugin that ships this one along with the rest of its 1 skill, 1 command.

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/skills/and3r817/dot-claude-plugins/android-analysis.svg)](https://agentmods.dev/skills/and3r817/dot-claude-plugins/android-analysis)

Your own site

<a href="https://agentmods.dev/skills/and3r817/dot-claude-plugins/android-analysis"><img src="https://agentmods.dev/badge/skills/and3r817/dot-claude-plugins/android-analysis.svg" alt="Measured on agentmods" height="20"></a>

Per session 63 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 4,340 The whole file, excluding the scripts and references it only reads on demand.

Security scan B 1 finding. 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.

Model	Per session	Once invoked
Fable 5	$0.00063	$0.04340
Opus 5	$0.00032	$0.02170
Sonnet 5	$0.00013	$0.00868
Haiku 4.5	$0.00006	$0.00434

Measured 4d ago against content hash 0b87ce701a75, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade B, and why

android-analysis scanned grade B with 1 finding 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 4d 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.

Unrestricted tool accessmediumExcessive agency

A wildcard tool grant or "run any command" leaves no least-privilege boundary at all.

allowed-tools: Read, Grep, Glob, Bash(jadx:*), Bash(apktool:*), Bash(apkanalyzer:*), Bash(java:*), Bash(unzip:*), Bash(jar:*), Bash(tree:*), WebFetch, WebSearch

android-analysis/skills/android-analysis/SKILL.md · 535 lines

How it starts

The opening of the file, as written. The whole thing — 535 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Android & Java Binary Analysis

Purpose

Comprehensive reverse engineering toolkit combining JADX (Android DEX), CFR (Java JAR), apktool (Smali), and apkanalyzer (structure inspection) to decompile compiled binaries into readable source code. This skill provides systematic guidance for choosing the optimal tool for each reverse engineering scenario.

When to Use This Skill

Invoke this skill when:

Decompiling APKs to Java source code for analysis
Reverse engineering AAR/JAR libraries to understand implementations
Extracting AndroidManifest.xml, resources, or assets from APKs
Analyzing obfuscated or ProGuard/R8-protected code
Understanding third-party SDK behavior or security practices
Investigating app architecture, API integrations, or authentication flows
Comparing different APK/library versions
User explicitly mentions "decompile", "reverse engineer", "jadx", "apktool", or requests binary analysis

Core Concepts

Tool Selection Matrix

File Type Decision:

APK → JADX (DEX to Java) or apktool (DEX to Smali)
AAR → Extract classes.jar → CFR (best) or JADX (acceptable)
JAR → CFR (primary) or Vineflower (modern Java 21+)
DEX → JADX only

JADX (Android DEX Decompiler)

Best for: APK and DEX files only
Always use: --deobf flag for obfuscated code
Use when: Analyzing Android apps, need GUI, or working with multi-format archives
Limitation: Poor Java decompilation quality (fails Lambda/Stream operations)

CFR (Java JAR Decompiler)

Best for: JAR files and extracted classes.jar from AAR
Fastest speed (6.5s for 1.5MB JAR) with best readability
Modern Java support (5-14) with excellent Lambda/Stream handling
Use when: Analyzing Java libraries, need accurate decompilation, or JADX output is unreadable

Vineflower (Modern Java Decompiler)

Best for: Java 21+ projects (records, sealed classes, pattern matching)
Multithreaded decompilation with clean output formatting
IntelliJ IDEA plugin available
Use when: Working with cutting-edge Java features

Read the full file on GitHub · 535 lines

Files

What ships with it

7 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.

4d ago First seen · 535 lines · 63 tokens per session scan B 0b87ce701a75

Subscribe to this mod's changes

android-analysis is a skill published in the GitHub repository and3r817/dot-claude-plugins (2 stars, last pushed 8mo ago), licensed MIT. It adds 63 tokens to every session and 4,340 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it B with 1 finding (unrestricted tool access). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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orchestrator

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android-analysis