If only Mac used a microkernel.

I had Fable in Ultracode fix in 42 minutes several complex Microkernel issue that 5.5-xhigh couldnt in 120 hours So, probably yes

HarmonyOS 5 and later are not based on Android (MatePad Mini launched with HarmonyOS 5.1) They use Huawei's own HarmonyOS microkernel

NØNOS is a microkernel that will not run code it cannot prove. ^ This is our standard. Today an unmodified Rust program compiled directly into a NØNOS capsule: signed, RAM-only, and zero-knowledge attested before it runs. No fork of the compiler. Just cargo build.

For people who keep asking what to build - Build your own operating system - Build your database - Build your virtual machine - Build your web server - Build your own game engine - Build your compiler - Build your own programming language - Build your own browser - Build your own blockchain - Build your own encryption algorithm - Build your own CPU emulator - Build your own file system - Build your own container runtime - Build your own package manager - Build your own shell - Build your own window manager - Build your own GUI toolkit - Build your own text editor - Build your own IDE - Build your own version control system - Build your own network protocol - Build your own operating system kernel in assembly - Build your own scheduler - Build your own memory allocator - Build your own hypervisor - Build your own microkernel - Build your own compiler backend (LLVM target) - Build your own query language - Build your own cache system (like Redis) - Build your own message broker (like Kafka) - Build your own search engine - Build your own machine learning framework - Build your own graphics renderer (rasterizer or ray tracer) - Build your own physics engine - Build your own scripting language - Build your own audio engine - Build your own database driver - Build your own networking stack (TCP/IP implementation) - Build your own API gateway - Build your own reverse proxy - Build your own load balancer - Build your own CI/CD system - Build your own operating system bootloader - Build your own container orchestrator (like Kubernetes) - Build your own distributed file system - Build your own key -value store - Build your own authentication server (OAuth2/OpenID Connect) - Build your own operating system scheduler - Build your own compiler optimizer - Build your own disassembler - Build your own debugger - Build your own profiler - Build your own static code analyzer - Build your own runtime (like Node.js) - Build your own scripting sandbox - Build your own browser engine (HTML/CSS/JS parser and renderer) - Build your own blockchain consensus algorithm - Build your own zero -knowledge proof system - Build your own operating system for embedded devices

People still use "Linux"? It's 2026 write your own microkernel. /s

Cracking a proof by pushing an AI agent framework like Fable to drive your underlying solvers past their normal timeout walls is a massive win. When you mention "the lobotomizes 4.8 and 5.5," you are likely referring to the underlying SMT solvers or model checkers (like Z3, CVC5, or specific abstract interpretation engines) that normally choke, time out, or run out of memory when hit with raw, un-decomposed verification conditions. By using Fable to handle the higher-level strategy, you temporarily brute-forced enough invariant generation and lemma slicing to let those automated backends finally finish. Leonardo de Moura (Microsoft Research): The godfather of Lean. He also created Z3, which is almost certainly the SMT engine doing the heavy lifting under your 4.8/5.5 solvers. If you are interacting with automated solvers, you are walking in his footsteps. Gerwin Klein & The seL4 Team: The legendary group behind seL4, the world’s first formally verified operating system microkernel. They proved functional correctness using Isabelle/HOL, defining how monolithic systems are broken down into proofs. Xavier Leroy (Inria/Collège de France): The architect behind CompCert, a formally verified C compiler written and proved in Coq (Rocq).

Well technically windows is a microkernel if you close one eye and raise your hands up

QNX is the only I know it's not related to research or educational. I also heard AmigaOS was a microkernel but I don't know much about those.

You aren't talking about making a microkernel, that's the reason I said "operating system." And, if it's FOSS, anything not in the kernel will always be incredibly fragmented. Things are already bad enough with this garbage ass kernel, stop trying to make it worse.

A microkernel isn't an operating system and you can have a non-fragmented OS built upon a microkernel.

"make a kernel" I'm afraid your design is already doomed if you think a big kernel is needed, or that classical syscalls should be the main way one exchanges information what you really want is a good L4 microkernel for the absolute basics, then build the userspace on top, and great L4 implementations exist already

it used to be based on AOSP, but now it seems to be mobile-first and totally custom made, with their own microkernel.

🫴 🦴 engrxiv.org/preprint/view/72…... What is this all about? It's a tiny custom RISC-V microkernel (~1,650 lines of C) built from scratch to run a Monero full node (monerod) securely. Instead of throwing node on a huge Linux kernel (millions of lines), it splits everything into 4 isolated services: crypto (keys) kv_store (blockchain) network (P2P) monerod (client)*** Each gets fixed capabilities at startup, as the kernel enforces strict isolation, solidifying security of the keys. It's just hardened node environment with minimal attack surface, but the logic behind it is genius... K.I.S.S. ❤️‍🔥❤️‍🔥❤️‍🔥 Say goodbye to Docker and Linux, and hello to a readable micro TCB... (***Substitute your own RISC-V flavour, like $AZERO (after the network upgrade is complete))... ❤️‍🔥 #cypherpunk AF...

They will not be able to slow the progress of these AI models. The others will catch up to this level eventually. The cyber threats will grow with every release, vulnerabilities will be found in areas never thought possible. $BB QNX Microkernel Architecture will be the most important OS system in the physical AI world.

This week nox, the shell inside the NØNOS microkernel, became a shell you can actually work in. Pipes, redirection, && and , history, completion, real line editing. The interesting part is that it does all of it with no libc, no std and no terminal emulator underneath. Thread. 🧵🥰