Not sure about vibe-coding it. While they aren't using v8, LLMs made it easier to understand v8 quirks and update v8 as they make weird changes every now and then. It couldn't write the runtime without help though.

For those curious: https://github.com/alshdavid/ion

Haha, is it really okay not to retract that that the official account previously posted a caricature criticizing Rust?