A user-defined bridge gives a set of containers a network boundary and name-based discovery. Creating the network doesn't attach containers that already exist. A running process may still be unable to serve useful work. A healthcheck runs a small diagnostic command and records whether it succeeds. Compose describes several services and their connections in one file. Each service has its own image, runtime environment and mounts; project networks let services address one another by name.
Apply those boundaries to fresh fixtures. Inspect the requested name, namespace, path and value before reusing a command. The tasks mix earlier operations and include nearby wrong targets, so preserve unrelated work. Choose any supported approach that produces the complete requested state; the checker evaluates the result rather than a recorded command sequence.