Show HN: Anos – a hand-written ~100KiB microkernel for x86-64 and RISC-V (github.com)

Anos is an open-source “toy kernel” microkernel OS project for x86-64 PCs and RISC-V that uses a capability-based security model and runs a user-mode supervisor (“SYSTEM”). The GitHub repo describes its STAGE3 microkernel components (IPC, scheduling, memory management, and minimal drivers) and current progress toward multitasking and user-space device drivers, including SMP support on x86-64 (up to 16 cores) and partial support on RISC-V. It also outlines a WIP cross toolchain based on binutils, GCC, and Newlib, plus build/run instructions for QEMU and UEFI disk images.