• Selectable desktop background with three modes: image (stretched wallpaper), solid (flat color), and jailbars (four brightness shades from one base), with a click-to-set RGB picker
• Original procedural wallpapers (no third-party assets): an 80s synthwave family (miami / outrun / mountains / road / vapor) and a tropical set, 1024×768
• Per-user accent theming — focused window title bars and the entire taskbar palette (bar, buttons, start-menu flyout) are derived from one accent color via scale_color
• Per-user settings layering over the registry: each login resolves its own desktop and accent, falling back to the machine default
• Live wallpaper Preview thumbnail (decoded + downscaled) and an Apply button in the Desktop pane
• New default boot: the synthwave "miami" wallpaper with a matching magenta-purple accent (0xC0308C); ttyv0 boots straight into /bin/views

• macOS-style single-window Settings app with a category sidebar: General, Desktop, Appearance, Network
• Desktop pane: background-mode tabs, wallpaper dropdown picker (keyboard navigable), live preview
• Appearance pane: accent RGB picker that writes the per-user override and re-themes views + taskbar live
• Network pane: DHCP/Static toggle with editable IP / netmask / gateway / DNS fields

• The 2004-era flat key/value ubistry rewritten as a hierarchical typed-tree registry: path-addressed string/int/bool leaves + ordered containers
• Persisted as text to /var/db/ubistry.db (load at boot, dirty-flag coalesced flush); served over MPI with a real GET/SET/ENUM/DEL request/reply protocol
• ubix_api client (ubistry_get/set/enum/del, plus per-user get_for/set_user) so any app can read/write config
• ulog()/ulogf() system-log wrapper (klog_write → logd → /var/log/messages) for background-service diagnostics
• Data-driven cascading start menu loaded from /views/startmenu (top-level categories + one submenu level, dispatched by exec path or @action)

• net_configure() syscall (slot 59) pushes a network config into the in-kernel lwIP stack on the tcpip thread
• DHCP and static configuration: bin/netcfg reads /net/* from the registry and applies it; runs at boot and is re-run by Settings
• Kernel still auto-DHCPs at boot, so networking works even if userland config fails

• Replaced UbixOS stub utilities (cat, ls, uname, stat) with busybox 1.36.1
• Text processing: grep, find, less, more, wc, head, tail, sort, cut, tr, uniq
• File operations: cp, mkdir, rm, mv, touch
• vi — busybox vi 1.36.1 ported to uBixOS

• objgfx PNG support: ogImage::Load() sniffs file magic and decodes PNG (any depth/color type) via vendored stb_image v2.30, alongside BMP
• Pseudo-terminal pool: graphical terminals run the user's interactive shell over a pty

• Pipe refcount + EOF handling corrected (no more 0xBEBEBEBE reads)
• Kernel now actually closes fd < 3 and allocates from the lowest free slot
• FAT ftruncate now shrinks the cluster chain instead of leaking clusters

• contrib/libcxxabi/ — minimal Itanium C++ ABI: new/delete, construction guards, pure virtual, __dso_handle
• contrib/libcxx/ — LLVM libc++ 18.1.8 subset: <string>, <vector>, <map>, <memory>, <algorithm>, <optional>, <variant>, charconv/ryu
• ubix.musl.cxx.prog.mk BSD make snippet for C++ programs with STL: -std=c++20 -fno-rtti -fno-exceptions
• C++ RAII wrappers: ubix::Mailbox, ubix::Shell, ubix::yield(), ubix::pid()
• bin/views, bin/taskbar, bin/term — migrated to STL (std::vector, std::string)

• QoS classes: SCHED_CLASS_RT, SCHED_CLASS_INTERACTIVE, SCHED_CLASS_NORMAL, SCHED_CLASS_BATCH
• I/O completion boost: tasks unblocked from I/O wait receive a transient priority increase
• CPU decay: long-running CPU-bound tasks shift down one QoS band automatically
• Starvation aging: tasks not scheduled for AGING_THRESHOLD ticks are promoted one band

• sigaction, sigprocmask, sigpending, sigsuspend fully implemented
• SA_SIGINFO frames with 128-byte musl-layout siginfo_t; SA_RESTART, SA_RESETHAND
• Process groups: setpgid, tcsetpgrp, Ctrl-C targets foreground pgrp
• SIGCHLD on child death; SIGSTOP/SIGCONT pause and resume
• AST delivery in timer ISR for SIG_DFL/SIG_IGN signals at user-mode preemption points

• Swap partition integration — 64 MB, clock-algorithm eviction (swap.c)
• Background pageout daemon — polls every 100 ticks, proactive reclaim (pageout.c)
• PAGE_SWAPPED PTE encoding; page fault handler restores from swap on fault

• Intrusive red-black tree (rbtree.c) replaces flat VMA array — O(log n) lookup
• vm_map_t embedded in kTask_t; fork copies, exec frees
• Demand-zero anonymous pages: mmap(MAP_ANON) reserves VMA only; fault backs
• MAP_FIXED and non-fixed anonymous mappings both supported

• /proc/mounts — walks mounted filesystem list; bin/mount rewritten to use it
• FD_TYPE_* and VFS_TYPE_* constants canonicalized across headers
• Ring-0 kernel stack enlarged from 4096 to 8192 bytes

• Fork now propagates pipe file descriptors with correct fd_type; pipe reads no longer block forever after fork
• FAT chdir deep-path stack overflow corrupting sig_pending — fixed by enlarging ring-0 stack
• Taskbar MPI wait retries on EINTR instead of treating signal interruption as error

• Full composited window system: Framebuffer, Window, WindowManager C++ classes
• Server-side decorations: title bar, close button, drag, Z-order, focus-follows-click
• bin/taskbar — taskbar ported to C++ with flyout launcher menu and clock
• bin/term — windowed VT100 terminal emulator using ogSurface and ogBitFont
• include/views/display_proto.h — MPI display protocol with DISPLAY_QUERY/DISPLAY_INFO
• Doom running windowed (vdoom) inside the compositor
• Tessera (Tetris clone) running as a windowed Views application

• bin/launcher/ — dead pre-2019 application, never integrated with MPI display stack
• lib/objgfx40/ — older objgfx fork, superseded by lib/objgfx/
• sys/sde/ — kernel-side Software Display Environment retired; replaced by userland compositor

• bin/ed/ — POSIX ed line editor: full address forms, all standard commands
• Syscall 42 sys_ttyctrl — kernel TTY raw/echo mode toggle
• TTY line discipline in atkbd.c: canonical mode, backspace, echo; raw mode for password masking

• fgetc returned 0 at EOF instead of -1 — fgets loops never terminated on short files
• Double-echo removed: echo now owned exclusively by keyboard ISR line discipline
• Login password prompt uses tty_setraw to mask input correctly

• musl libc 1.2.5 ported to uBixOS; replaces hand-rolled libc
• ELF dynamic linker — libexec/ld; PT_LOAD, PLT/GOT, RELA relocations
• tcsh 6.24.16 as default login shell
• FreeBSD syscall ABI compatibility layer (slot 0–500)
• AC97 audio codec driver with DMA ring-buffer playback
• DOOM port (vdoom) — fullscreen and windowed via SDE
• USB UHCI host controller — HID keyboard + mass storage

• O(1) priority bitmap scheduler (Phase 1 — 32-level bitmask, constant-time dequeue)
• procfs: /proc/<pid>/status, maps, cmdline
• FAT16/FAT32 VFS with LFN support
• IDE (ATA) driver with DMA
• Initial Views compositor (C-based, SDE-backed)
• MPI inter-process messaging system

• First public release of uBixOS — bare-metal i386 kernel with basic task scheduling
• Boot via GRUB; simple memory manager; hand-written GDT/IDT setup
• VGA text mode console output
• The kernel that kicked off a 20+ year project