Module versions 

Version pins and the pipe name. An incompatible wire change bumps the pipe name itself (-v2), not just a number — see ARCHITECTURE.md.

Constants

ABI_VERSION

FFI ABI version — bumped when the in-process fmf_engine.dll POD layout changes incompatibly.

PIPE_NAME

Full pipe path (Rust side opens this).

PIPE_NAME_SHORT

Short name (C# NamedPipeClientStream takes the name without the \\.\pipe\ prefix; gen-contract radiates this one).

PROTOCOL_VERSION

Pipe wire protocol version — bumped when the named-pipe message format changes incompatibly (which also moves the pipe name to -v2).

SERVICE_NAME

SCM service name — deployment surface shared by fmf-service’s lifecycle subcommands and the app’s in-app service setup.