Module background_shell 

Background shell session lifecycle and shared manager state.

Structs

BackgroundShellManager

Manages background shell sessions - matches WCGW Python’s background_shells dict

ExitedShellInfo

Snapshot of a background shell that has exited but whose final output has not yet been consumed by the caller. We keep it around so the next call (typically a status_check) can return the trailing output before the entry is gone.