How do you find adding new architectures to it? I've been meaning to add some architectures I want to Radare for a while now, but it's a bit daunting due to lack of docs and the build system is argh. And I've also been wanting to learn Rust, so this seems like an obvious fit for me...
Panopticon includes a simple disassembler framework. The basic idea is that you provide opcode patterns akin to regexp and write a function that emits mnemonics and code describing opcode semantics. There isn't much documentation, but you can take a look at the AVR and MOS 6502 disassemblers in lib/src/mos resp. lib/src/avr.
