The mesh's one resolver, what every node asks, and a node's hosts file (hq ADR 0194, 0196, 0199)

- dnsmasq holds mesh-dns-resolver: provides wildcard-resolution mesh-wide, forwards every declared
  zone (zones fact), listens on the private address and loopback only, reads no hosts file and no
  operator's files, and no longer writes the container runtime's dns.
- resolv-conf names the mesh's resolver by address, then 1.1.1.1, timeout 1, one attempt; it now
  holds the runtime's live-restore, which dnsmasq held and every node needs.
- resolved-split-dns routes the suffix to the mesh's resolver by address, not 127.0.0.1.
- hosts: new module holding node-hosts-file — the machine's own lines in its block of /etc/hosts,
  the operator's lines kept, changed by entries/add/remove through sudo -n.

modules/hosts/tools/index.ts

@@ -0,0 +1,40 @@
+// The hosts file's tools: the node-hosts-file seat's three verbs (novox/hq ADR 0199) — the file's lines
+// with whose each is, add an operator's line, remove one. They change the machine's file and nothing
+// else; the controller holds none of it.
+
+import { registerModuleTools, type ToolDefinition } from "@novox/mesh-sdk/tools";
+import { HostsFile } from "../client.js";
+
+export function getSeatVerbs(hosts: HostsFile): ToolDefinition[] {
+  return [
+    {
+      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: {},
+      run: async () => hosts.entries(),
+    },
+    {
+      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. Nothing changes when they are already there.",
+      input: {
+        address: { type: "string", description: "the IPv4 or IPv6 address" },
+        names: { type: "string", description: "the names for it, separated by spaces" },
+      },
+      run: async (args) =>
+        hosts.add(String(args.address ?? ""), String(args.names ?? "").split(/[\s,]+/).filter(Boolean)),
+    },
+    {
+      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: { name: { type: "string", description: "a host name, or an address to remove every line of" } },
+      run: async (args) => hosts.remove(String(args.name ?? "")),
+    },
+  ];
+}
+
+const hosts = HostsFile.onThisMachine();
+// The seat's verbs under the seat's name: the runtime serves them as <node>/node-hosts-file.<verb>.
+registerModuleTools("node-hosts-file", () => getSeatVerbs(hosts));