A machine's uplink is a seat (hq ADR 0117)

the-uplink joins the closed set as a node seat delivering nothing. Its
holder is the module for the machine's own network manager, and keeps
that manager from contradicting the mesh — the resolver file left to
resolv-conf, mesh0 left alone — without ever declaring a link. Held
per machine, so a machine running two managers is refused at
assignment rather than found by its resolver being rewritten. The
count test moves to fifteen; one test holds the seat's shape.

internal/catalogue/seats.go

@@ -47,6 +47,13 @@ var seats = []Seat{
 	{Name: "the-private-network", Scope: ScopeNode, Decision: "novox/hq ADR 0110"},
 	{Name: "the-resolver-configuration", Scope: ScopeNode, Decision: "novox/hq ADR 0110"},
 	{Name: "the-showcase", Scope: ScopeNode, Decision: "novox/hq ADR 0110"},
+	// The program that manages the machine's own network. It delivers nothing: its holder only
+	// keeps the manager and the mesh from contradicting each other — the resolver file left to the
+	// mesh, the private network's interface left alone — and never declares a link, an address or
+	// a wireless network, because the link is the only channel a fix could arrive on. A seat
+	// rather than a condition in the resolver's module, so a machine running two managers is
+	// refused at assignment instead of found by the resolver being rewritten (novox/hq ADR 0117).
+	{Name: "the-uplink", Scope: ScopeNode, Decision: "novox/hq ADR 0117"},
 }
 
 // Seats is every seat the mesh defines, in reading order.