The plain-English version
A boundary allowing code written for different language environments to call each other.
Why it matters
It requires agreement about types, memory, ownership, and error handling.
Let’s make it click
A Python application calls a native image-processing routine through a binding.
Vibe Bro’s heads-up
A compatible function name is insufficient when string encoding, buffer lifetime, or calling conventions differ.
The docs behind it
Documentation links checked .
Editorial review · October 28, 2026
Supported: FFI description correctly requires agreement on calling convention, encoding, sizes, errors, and lifetimes.