Beating the 678-Byte APK on Modern Android
The smallest known APK was 678 bytes, but it stopped installing on Android 14+. I wrote a custom toolchain and pushed a modern installable build down to 624.
Replacing FFmpeg with 79 Lines of Java
I needed to extract AAC audio from HLS streams on Android. FFmpeg added 10MB to the APK. So I read the spec and wrote a demuxer from scratch.
Writing a Reflective PE Loader in Rust
Implementing a reflective PE loader in no_std Rust: XOR-encrypted payload, dynamic API resolution via hash, manual section mapping, IAT patching, relocations and header wiping.