The mesh's one resolver: its seat, a provider's address, zones, and a node's hosts file (hq ADR 0194, 0196, 0199)

- mesh-dns-resolver: a mesh seat delivering wildcard-resolution, so every node's resolver
  configuration resolves to its one holder; node-dns-resolver kept until nothing claims it.
- ${bound:<provision>:address}: the providing machine's private address, for the one consumer
  that cannot use a name — a machine's resolver configuration.
- zone: a module declares the zone it answers and the listen that answers it; the controller
  settles it per node, refuses duplicates and shadowing, and hands the resolver .Zones to forward.
- node-hosts-file: a node seat whose holder owns /etc/hosts, with entries/add/remove.
The resolver tests follow the catalogue: no runtime dns (containers copy the machine's resolvers),
live-restore held by resolv-conf, resolv.conf naming the resolver by address then a public one.

internal/catalogue/seats.go

@@ -107,7 +107,31 @@ var defaultSeats = []Seat{
 	// that machine unresolvable in the meantime. Deleted once no registered manifest claims it.
 	{Name: "mesh-build-machine", Scope: ScopeMesh,
 		Accepts: []string{"build"}, Emits: []string{"started", "built", "log.*"}, Decision: "novox/hq ADR 0190"},
+	// **The mesh's one resolver** (novox/hq ADR 0194, 0196): every node's internal domain, held in one
+	// place, and every node and container asks it first. Delivers what a machine's resolver
+	// configuration requires, so that requirement resolves to the holder wherever it is placed.
+	{Name: "mesh-dns-resolver", Scope: ScopeMesh, Delivers: "wildcard-resolution", Decision: "novox/hq ADR 0194"},
+	// **Retired by ADR 0194, kept while a manifest still claims it** — the same reason as
+	// mesh-build-machine above: a machine still holds it until the mesh's resolver replaces it, and
+	// removing the row first would make that machine unresolvable. Deleted once nothing claims it.
 	{Name: "node-dns-resolver", Scope: ScopeNode, Decision: "novox/hq ADR 0121"},
+	// **A machine's /etc/hosts is one module's** (novox/hq ADR 0199): its holder writes the machine's
+	// own lines and keeps every other line as the operator's, changed through these three verbs on that
+	// machine alone. The controller holds none of it.
+	{Name: "node-hosts-file", Scope: ScopeNode, Decision: "novox/hq ADR 0199",
+		Serves: []Verb{
+			{Name: "entries", Description: "Every line of this machine's /etc/hosts, each marked whose it is: " +
+				"the operator's, or the block of the module or tool that writes it.",
+				Input: schema(map[string]string{}, nil)},
+			{Name: "add", Description: "Add one address and its names to the operator's lines of this machine's " +
+				"/etc/hosts — a name for this machine's own programs, not the mesh's.",
+				Input: schema(map[string]string{"address": "the IPv4 or IPv6 address",
+					"names": "the names for it, separated by spaces"}, []string{"address", "names"})},
+			{Name: "remove", Description: "Remove one name, or every line of one address, from the operator's " +
+				"lines of this machine's /etc/hosts. A line a module writes is refused, naming the module.",
+				Input: schema(map[string]string{"name": "a host name, or an address to remove every line of"},
+					[]string{"name"})},
+		}},
 	// The intrusion prevention's verbs (novox/hq ADR 0179): what a person asks a machine's ban list
 	// whatever keeps it — who is banned and why, ban one address, let one go. Every holder serves all
 	// four; the jails themselves are composed from the modules the machine runs (to-be 31).