Scale
- Half a million first-party lines (509,590)
- 3,491 files · 5,357 host unit tests
- 102 syscalls · 103 multicall applets
- 3,552 commits · ~30/day avg · 118 days
Okei OS
A 64-bit operating system built from scratch. We boot it in QEMU, VirtualBox, and a custom browser emulator — Multiboot2 kernel, Ext4, GNU Bash, and Okei Desktop. Pre-alpha and not public yet.
Status · 15 August 2026
Where the project is now
Private tree is a product-shaped OS: Bash, Okei Desktop, real networking, HTTPS/scp/git, and QEMU-proven desktop click-paths. Active engineering is a first-party house-clean — read every in-tree file, write contracts, file findings; review commits do not silently “fix.” Later host-unit children may wire helpers. On 9 August 2026 we first booted on a physical Raspberry Pi 5 with an HDMI text console (OKEIOS_AARCH64_FB_BOARD_OK). QEMU free-path SSH gates stay green; board userspace and headed Terminal free-path SSH polish continue.
House-clean (13–15 Aug)
812 H children closed. 1,038 files on the ledger (of 3,491). 2,411 findings filed, not a fix list. Kernel ~82% + all of libc + more than half of Okei Desktop. Tests and scripts not started.
Solid today
CA-verified HTTPS, Dropbear scp, freestanding git, Vim/PTY/tmux, desktop click-paths + title-close + PPM/BMP, shared newlib + opt-in bash-dyn, VBox public ping / self-SSH / curl okeios.org. Product /bin/bash stays static.
Open residual
Rest of the house-clean (tests, scripts, leftover drivers/apps); Pi 5 board userspace; headed Terminal free-path SSH UX; headed remote X PRESENT. Not a public download.
Platform
What we've built so far
A private make all produces a bootable ISO with kernel, GNU userspace, and Okei Desktop. That image boots under QEMU, VirtualBox, and a web x86_64 emulator. Separately, an AArch64 flash image boots on a Raspberry Pi 5 to an HDMI boot console.
curl okeios.org/helloworld). Same capture as the 28 Jul milestone (illustrated here for the product stack).
OKEIOS_AARCH64_FB_BOARD_OK and
OKEIOS PI BOARD HDMI CONSOLE.
Kernel EL1 + DTB probe live; virtio absent (expected on board);
userspace still NO_USER until microSD root lands.
Kernel
Monolithic ring-0 core: scheduling, 4-level paging, Ext4 VFS, PTY, in-kernel TCP/IP, ptrace, AHCI/NVMe. Multiboot2 on QEMU, VirtualBox, and the web emulator.
Userspace tools
Upstream ports — GNU Bash 5.2, Vim, coreutils, grep, sed, find, bc, curl, wget, Dropbear (+ scp), strace, freestanding git and OpenSSH client, tmux — plus okeios-box (103 applets) and opt-in PIE bash-dyn. Product /bin/bash stays static.
Okei Desktop v1
Display server, panel, Start menu, 21 registered apps (Terminal, Notepad, Calculator, Chess, Solitaire, Asteroids, Settings, and more). Title-close and QEMU click-path gates on shipped apps.
Quality gates
5,357 host unit-test definitions plus QEMU/VirtualBox smokes for net, storage, desktop, multicall, git, and SSH. Not every suite is re-run for each site edit.
3552
git commits
3491
first-party files
510k
lines of code
5357
host unit tests
103
multicall applets
102
system calls
First-party scope matches scripts/marketing_metrics.sh (15 Aug 2026): kernel, boot, userspace, tests, scripts, GRUB, image config — not vendored third-party trees.
Growth track: 1,369 files / 292k LOC (23 Jul) → 2,075 / 342k (28 Jul) → 2,450 / 397k (4 Aug) → 2,827 / 434k (6 Aug) → 2,954 / ~450k (9 Aug) → 3,033 / ~459k (14 Aug) → 3,491 / 509,590 now — first time over half a million first-party lines. Syscalls 89 → 102. House-clean (13–15 Aug): 739 commits, +65,666 / −6,491 lines, 1,255 source files touched.
Timeline
Milestones
Reverse chronological. Eyebrow dates are capture or land dates from our private trees — not website-publish dates.
Milestone · 15 August 2026
Half a million first-party lines
The in-tree count crossed 500,000 lines — 509,590 today, in 3,491 files. That is kernel, boot, userspace, tests, scripts, GRUB, and image config. It is not vendored Bash, Vim, or the toolchain. One hundred and eighteen days after the first SlimOS commit (19 Apr), the private tree is a half-million-line operating system we boot ourselves.
How it grew
292k on 23 Jul → 450k on 9 Aug → 459k on 14 Aug → 510k on 15 Aug. About 217k first-party lines in three weeks, then the last 50k in a day of leftover splits and host units.
What the number is
Same find as scripts/marketing_metrics.sh. C, headers, assembly, shell, Python, linker scripts, GRUB/image config. Third-party ports stay out of the total on purpose.
What it is not
Not a finished product, not a public tree, not a claim that 2,411 house-clean findings are fixed. Size is a milestone. Behavior still has to earn each gate.
Alongside
3,552 commits (~30/day). 5,357 host unit-test definitions. 102 syscalls. Pi 5 HDMI boot already landed. House-clean still walking the rest of the tree.
Status · 13–15 August 2026
First-party house-clean: a thousand files on the ledger
Before a public tree, every first-party file is being read by hand. Review commits add contract comments and a ledger row. They do not close the bugs they find. Later host-unit children may wire helpers and can change product policy.
Pace
739 commits since 13 Aug (304 / 327 / 206 on 13–15). 812 H children closed. Parent epic stays open until all 3,491 metrics files have a row.
Read so far
1,038 ledger rows — kernel 714/870, all of userspace/libc, Okei Desktop 230/396. Tests (1,437) and scripts (310) not started.
Catalog
2,411 findings (1,228 contract, 1,101 logic, 82 security) and 2,367 missing-test rows. Filing is not fixing.
Diff
Since 13 Aug: +65,666 / −6,491. Source +53,941 / −4,239 across 1,255 first-party files. Ledger docs are a large share of the rest.
Milestone · 9 August 2026
Raspberry Pi 5 boots with HDMI console
First physical Raspberry Pi 5 (1 GiB) boot of the AArch64 kernel with a real HDMI text console via the VideoCore property mailbox. Capture on a wall monitor shows board markers end-to-end from framebuffer init through DTB and syscall table.
okeios-pi5-aarch64.img.What works
FB_BOARD_OK, HDMI paint, EL1, DTB probe, VBAR/SVC table. Soft virtio correctly reports VIRTIO_NONE.
Next on board
Userspace after NO_USER (1 GiB-safe load + microSD root), debug UART base map, then shell on HDMI.
QEMU path
AArch64 virt bash + interactive CLI remain the daily software gate for the same tree.
Honesty
HDMI console ≠ board shell. SDHCI root and board UART still open task gates.
Milestone · 6 August 2026
HTTPS, scp, git, and desktop click-paths
Closed CA-verified HTTPS (curl + wget), Dropbear scp put/get, freestanding git porcelain, live ssh -X x11-req smoke (protocol path), Vim/PTY/tmux, title-bar close campaign, image PPM+BMP Open/Save, and QEMU click-paths across shipped desktop apps. Product Bash remained static.
Net
Real CA verify; scp session-close green; product /bin/ssh stays Dropbear dbclient.
Git & editors
Guest add/commit/status/diff/log; Vim edit round-trip; Multiboot tmux.
Desktop
File Manager, Calculator, Chess, Solitaire, Task Manager Kill, Calendar, Theme, Network, Asteroids, Font Viewer, Settings — host selftest + QEMU markers.
Scale then
~434k LOC · 4,210 unit tests · 2,827 files · 102 syscalls.
Milestone · 5 August 2026
Shared libc, dyn bash, Bash honesty
PIC newlib as shared libraries, opt-in bash-dyn (guest dyn smoke), DT_GNU_HASH, and honest Bash sleep/getppid/alarm/ttyname paths. Product /bin/bash stayed statically linked. okeios-box at 103 applets.
Milestone · 4 August 2026
Multicall, terminal stability, sparse root, USB HID
okeios-box multicall expansion, terminal stability suite (single finish predicate, FG_EXIT on all zombie deaths), sparse demand Ext4 root, xHCI HID software path, product DNS, gzip Multiboot module.
Milestone · 1 August 2026
Pipeline stability and product tools
Multi-loop Bash pipelines that survive real work; FHS-style PATH; upstream find/bc/kill; product smoke for grep/ps/scp; NVMe root e2e; RO text COW on fork. Footprint then ~366k LOC.
Milestone · 28 July 2026
VirtualBox desktop curls okeios.org
Under Oracle VirtualBox, Okei Desktop Terminal runs curl okeios.org/helloworld and prints the live greeting — DNS, TCP, and HTTP through the in-kernel stack.
Milestone · 27 July 2026
Self-SSH, ~16s desktop path, strace, NVMe
Guest self-SSH over loopback TCP, VirtualBox GUI path cut to ~16 s to Terminal (lab bench), upstream strace 6.9 on real ptrace, PCIe NVMe driver.
Milestone · 23 July 2026
VirtualBox boots and pings the Internet
Same Multiboot2 ISO under VirtualBox reaches interactive Bash; guest ping google.com receives a public ICMP reply.
Milestone · 11 July 2026
Bash in a web x86_64 emulator
Real Multiboot2 kernel and userspace reach interactive bash-5.2# in a custom browser emulator (sibling okeios-web) — not v86, not QEMU-in-WASM.
Milestone · 26 June 2026
Okei Desktop in QEMU
Terminal, Chess, and the desktop panel together — Desktop v1 visual from a private make all image.
Milestone · 21 June 2026
Project renamed to Okei OS
Codebase and product language standardized on Okei OS and Okei Windows (desktop). Public and marketing names use Okei Desktop for the GUI; source trees keep the okeiwin prefix as an implementation detail.
Milestone · 21 April 2026
First ISO build and QEMU boot loop
Within days of the repository starting, the tree produced a bootable ISO and launched QEMU. Same-day work fixed Multiboot long-mode entry, page-directory layout, and identity-mapped kernel paging — the “getting code working” phase.
Milestone · 19 April 2026
Git history begins
First commit on master: project scaffolding, Multiboot2 stubs, GDT/IDT, VGA/serial, page allocator, scheduler sketch, VFS notes, Makefile/QEMU, and phased task tracking. Project age is counted from this commit.
Honest status. Okei OS is private pre-alpha — not a download, not open source yet. What “works” is what we verify with builds, QEMU gates, VirtualBox boots, and the web emulator. The house-clean is a read-and-file campaign plus host-unit extracts — not a claim that 2,411 findings are fixed. Pi 5 board userspace, headed Terminal outbound SSH polish, and remote X PRESENT remain lab residuals. Optimistic about a public open-source release soon; no hard calendar date.
Basics
What is an operating system?
An operating system is the brain and nervous system of a computer — the software that wakes up the hardware, manages memory, talks to display and keyboard, and gives applications a safe place to run. Building one from scratch means owning every layer of that story.
Direction
Where we are headed
Near-term: installable pre-GUI release — reproducible build/install, newlib sysroot, Bash as the interactive shell, real userspace networking, PTY substrate — then deeper GUI polish. Longer term: local-first tooling and creator workflows.
Productivity & Office
Browser, email, notes, documents, spreadsheets — on the Horizon map, not built today.
Creator's Suite
Page design, image/video, CAD-style tools for makers.
On-device AI
Local intelligence without cloud dependency.
Aether windowing
Capability-secure remote surfaces over the network.
FAQ
Common questions
What is Okei OS?
A from-scratch 64-bit OS with a custom kernel, GNU Bash, upstream utility ports, and Okei Desktop v1. Private pre-alpha — we boot it in QEMU, VirtualBox, and a browser emulator.
Can I download or run it?
Not yet. No public repository, ISO, or hosted emulator. A public open-source release is a near-term goal without a fixed ship date.
Is there a web browser or office suite?
No. Those categories are on the Horizon — direction only.
Where is the technical truth?
The OS page has architecture, boot path, ports, and known gaps — still our private tree, not a public binary.
Open source · soon
Availability
Okei OS is not public yet — no open repository, no downloadable ISO, no hosted emulator for visitors. We are preparing an open-source release and are optimistic it can go public soon, once build, test, and contribution workflows are solid enough to invite others in.