When a label is set (e.g. "bob"), the display becomes "bob (claude-implementer)"
so the agent type is always visible. Affects all three backends (docker,
macos-container, smolmachines) and the `cli.py list active` output.
Closes#243
`container system info` is not a valid subcommand and always returned
non-zero, causing a false-positive on the service check. Switch to
`container system status` which is the correct command.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Fail early with a clear message when the Apple Container system service
isn't running, instead of surfacing an opaque XPC connection error mid-build.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>