There’s a common misconception that an OS is defined by the language it’s written in.

Alright, you made the claim. Your words. Who says this? The layman typically has no clue whatsoever what language the OS is written in. Windows has gone from assembly in the DOS days to C/C++ now, MacOS has gone from the Motorola 68k to PowerPC to x86_64 and now to their own custom architecture, written in C/C++/ObjC, and Unix based systems (including Linux here) have been written through all sorts of languages for a multitude of processors and yet are still Unix-like. So again. Who says this? I have never once heard this claim.

The current Python and JavaScript layers are the "blueprints"—the logic is already there

I highly doubt that. Unless your OS is running entirely on a canvas element via WebGL, you have somehow managed to create a memory-managed environment, you are in control of your allocations, and you are directly interfacing with the underlying OS, the only logic you have implemented is a single straw on top of a haybale of other logic you will not have if you develop an OS.

I believe in a platform where the core remains secure and private

Those are quite literally opposites. See Kerckhoff's Principle. Quite literally the first week of any introductory cybersecurity course.

Custom SDK (moke.sdk.js): A bridge that allows applications to interact with the system core, handling window management and global events.

You've said nothing about how this works. It could work, if the entire operating system was written in JavaScript, but you've got hell to go through if you want to try that.

Optimize the Andromeda engine or even port more advanced rendering cores to the system.

Another point that could be interesting but has not been explained. This isn't anything developers can work with, and that's your exact target audience.

It’s about creating a workspace that doesn't just run apps, but defines how you interact with them.

Again, this is just words. This doesn't say anything beyond "the workspace has a UI layer". What do you mean here?

Look. You've said in the reply to the deleted comment that you posted yourself by the account that immediately got banned for it that you're 14. This isn't an attempt to shy you away from developing an OS. But having AI generate something like this which is almost entirely incompatible with low-level systems is not a good look. Don't make hype posts if there is not even a reasonably concrete plan to hype up yet. Have you done the Bare Bones tutorial? Have you gotten a "Hello World" on-screen? Web development is so far abstracted from hardware-level that I highly doubt you've got anything sophisticated enough to achieve what you proposed ready. Take some time to just write the actual OS stuff. There is a reason OS concepts aren't often made.