To be honest I don't see how a "style guide" is going to help. C++ has had all sorts of guidelines and style guides for decades and it helps a bit but... not really.

It does help though without requiring a complete rewrite in another language, which is prone to causing entirely new issues and reintroducing old, fixed ones.

Like I said, Rust does a much better job at avoiding these. "Claude rewrite this in Rust" doesn't give you those benefits for free.

Is this style guide not a style guide?

It's a start, but doesn't say much about methods to avoid the memory issues that they supposedly had issues with. If they intended to actually use it, maybe it'd have more than 7 commits from 8 months ago. Maybe they would have updated it with patterns to prevent new bugs in the future based on the bugs they ran into. That didn't happen, though.