Function elect_unmatched_server 

pub fn elect_unmatched_server(
    servers: &[McpServerStatus],
    configured: &[ConfiguredMcpServer],
    roots: &[RootProcess<'_>],
) -> Option<(u32, String)>

Pair the sole unmatched Connected stdio server with the sole unmatched candidate process, returning that process’s pid and the name its row takes.

A join by ELIMINATION, not identity - nothing observable ties a server to its process - so two leftovers on either side decline rather than guess.

What the Connected filter buys is narrow, and it is not liveness: it only guarantees the name attached comes from a server the CLI last reported as connected, so a Pending or Failed server can never lend its name. It does NOT establish that the elected process belongs to a live server. A server that connected and then died still reads Connected until the CLI notices, and there is no liveness signal on the wire to check - so in that window the sole remaining candidate can be paired with a dead server’s name. Declining on snapshot age would not help: in that case the snapshot is fresh and still says Connected.