The TypeScript SDK's state reaches the runtime, a narrowed watch only its keys (novox/hq ADR 0201)

node-tools/test/fixtures/state-sdk.mjs

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+// A module that keeps state through the SDK (novox/hq ADR 0201): it watches its servers as it is
+// imported, and writes each change it is handed to STATE_LOG; one tool registers a server.
+import { appendFileSync } from "node:fs";
+import { state } from "@novox/mesh-sdk/state";
+import { registerModuleTools } from "@novox/mesh-sdk/tools";
+
+const servers = state("servers");
+await servers.watch((c) => appendFileSync(process.env.STATE_LOG, `${c.current ? "was" : "now"} ${c.op} ${c.key}\n`));
+await servers.watch((c) => appendFileSync(process.env.STATE_LOG, `narrow ${c.op} ${c.key}\n`), { key: "anchor.*" });
+appendFileSync(process.env.STATE_LOG, "current\n");
+registerModuleTools("sdkkeeper", () => [
+  { name: "register", description: "put a server", input: {}, run: async (a) => servers.put(a.key, { url: a.url }) },
+]);

node-tools/test/fixtures/state-sdk.serve.mjs

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+#!/usr/bin/env node
+// The launcher the builder writes beside an entrypoint (novox/hq ADR 0193), for state-sdk.mjs.
+import { serveRegisteredOverStdio } from "@novox/mesh-sdk/stdio";
+await import("./state-sdk.mjs");
+await serveRegisteredOverStdio();