The definitive source of truth is here: github.com/WebAssembly/...
My c++ host implementation is here: github.com/GordonSmith/...

Yes — the host (c++, Rust, Java, etc) typically embeds a WebAssembly runtime (such as Wasmtime, WAMR, Chicory, or V8), which allows it to load and invoke guest WebAssembly modules—compiled from any language—while keeping them safely contained within the sandbox.

I have tried to keep current with the component model ABI specification (but depends on who is asking!).

I do embeddings not at the edge, but at the client (even better for the use case) using llama.cpp (in webassembly), it downloads the bge-base-en-v1.5-gguf embedding model as needed as well as a pre-calculated vector db (small enough to be to be in memory).

GitHub - microsoft/wassette: Wassette: A security-oriented runtime that runs WebAssembly Components via MCP Wassette: A security-oriented runtime that runs WebAssembly Components via MCP - microsoft/wassette

Something like: github.com/microsoft/wa...

I feel your pain - but if you have worked in the cross-compiler world (developing for platform X on platform Y) you will recognise a lot of those pain points and appreciate the "why" it is painful... IMO there is a critical mass now and you only need to look at all the "where" places it can be run!

Had to google "idempotent" due to AI review of my code (in hindsight I should have asked Chat GPT)...

When you say "the other one", I assume you mean another wasm module? If so, one wasm module, can't load another. But a single host can load two wasm modules and resolve their "imports" between them.

Ok, I will bite - what issues with WASI preview 3?

GitHub - GordonSmith/spin-vitepress: Vitepress + Spin Vitepress + Spin. Contribute to GordonSmith/spin-vitepress development by creating an account on GitHub.

I use spin + vitepress for such things. Here is a boilerplate repo: github.com/GordonSmith/... and generated site: vitepress.fermyon.app

Azure Data Lake Storage query acceleration - Azure Storage Query acceleration enables applications and analytics frameworks to dramatically optimize data processing by retrieving only the data that is required for a processing operation.

Any word on data accelerators being replaced with Hyperlight and Wasm?
learn.microsoft.com/en-us/azure/...

You may get better stack info, if you enable DWARF?

Partial implementation of the #WebAssembly Component Model ABI for C++ hosts starting to take shape:
github.com/GordonSmith/...

Kotlin?

I use the VitePress doc generator and it uses TextMate grammars via Shikira (from memory).

It does doesn't it!
But there is one significant difference: Java / JVM has full access to the host machine by default, while WebAssembly has zero access to the host machine by default...

Develop serverless WebAssembly apps with Spin Develop serverless WebAssembly apps with Spin

I would recommend taking a look at "spin" from fermyon: www.fermyon.com/spin

Ensure you using a fast host (wamr, wasmtime etc), then you do an AOT compile for that host.
The other trick in the bag is to use github.com/bytecodealli... which lets you pre-run your wasm module up to a defined point and snapshots at that point, ideal for pre-initializing runtimes etc.

Shamless plug - There is a vscode extension which wraps all this up into a notebook enivironment: marketplace.visualstudio.com/items?itemNa...

It also has an `export to html` option to host in a single page...

I think you are missing the "why" of the hype.
If you limit your world view to hosts that can already run JS/TS natively then you are correct.
But given WASM can also execute in so many places outside of browser engines and since Rust treats WASM as a first-class target, the hype train isn't over.