Zstd gets rather easier from dotnet 11, it becomes a near one-limer since it's getting added into System.IO.comoression.

I know this because my agent already knew this the other day when I was evaluating compression, but that's because it has access to search.

That's a key part of what makes agents good coders too, mine is often looking up and downloading the source for how libraries are implemented.

It seems unnatural to air-gap them for evaluation.

I guess they didn't want them just finding an existing library to copy, but it's not very "real-world" to deny the ability to search quickly.

That said, the best language is still just the one you know. No amount of token saving is worth getting a bunch of code back you can't easily understand and review.