jadx is a production-grade Android DEX/APK to Java source decompiler, providing both a command-line tool (jadx-cli) and a feature-rich Swing GUI (jadx-gui). The architecture is a multi-module Gradle project with a plugin system for input formats (DEX, Java class files, Smali, AAB, XAPK), decompilation passes, resource handling, and deobfuscation. The core decompilation pipeline uses a visitor pattern over a custom intermediate representation (IR) with type inference, SSA construction, region-based control flow, finally block extraction, and code generation. The codebase is actively maintained with a large test suite, but exhibits technical drift through deprecated APIs, complex state machines, and some unmaintained code paths. The plugin system and zip reader module are well-isolated and potentially reusable.