DexKit is a high-performance C++ library for runtime parsing and querying of Android DEX bytecode, primarily used by Xposed module developers to locate obfuscated classes, methods, and fields. It provides a rich DSL in Kotlin/Java for constructing structural queries based on annotations, opcodes, string usage, field/method references, and more. The core engine parses DEX files from APK archives, builds in-memory indexes, and uses algorithms like Aho-Corasick for substring matching and the Hungarian algorithm for unordered set matching. Communication between the native C++ layer and JVM is handled via FlatBuffers serialization. The library also includes an optional caching layer (`DexKitCacheBridge`) for persisting query results across app restarts. It is distributed as an Android AAR via Maven Central and includes a demo app and unit tests.