Everyone has seen Windows binaries run on Linux. This goes the other way: Mach-O executables built for macOS, running unmodified on Linux ARM64 with no virtual machine underneath. The prototypes are honest about where they stand — 7-Zip passes a multi-threaded test over an 8,000-file tree at about five times slower than native, curl clears 200-plus commands and options, Xcode’s git does the basics. Kakehashi is Japanese for a bridge between two things.