- Implement Limine v8 boot protocol requests in dedicated PT_LOAD RW segment - Configure IOPL=3 and SSE in arch setup for Ring 3 drivers and libc - Unify scheduler context switching via switch_to and preempt_tick - Support dual-source keyboard/serial input in sys_key_read - Add automated 'make image' and 'make run' targets for instant QEMU launch - Complete interactive UNIX-like shell (osh) with built-in commands & ramdisk