Today, we released the 1.0 version of the CHERIoT specification! For those reading about CHERIoT for the first time, it is a hardware-software co-design project that aims to produce secure microcontroller-class systems for connected devices. We start with a foundational guarantee of memory safety (the hardware will trap on buffer overflows or use after free errors, even in assembly code) and build rich (and usable) compartmentalisation abstractions on top.