feat: add exec host routing + node daemon

src/node-host/config.ts

@@ -0,0 +1,74 @@
+import crypto from "node:crypto";
+import fs from "node:fs/promises";
+import path from "node:path";
+
+import { resolveStateDir } from "../config/paths.js";
+
+export type NodeHostGatewayConfig = {
+  host?: string;
+  port?: number;
+  tls?: boolean;
+  tlsFingerprint?: string;
+};
+
+export type NodeHostConfig = {
+  version: 1;
+  nodeId: string;
+  token?: string;
+  displayName?: string;
+  gateway?: NodeHostGatewayConfig;
+};
+
+const NODE_HOST_FILE = "node.json";
+
+export function resolveNodeHostConfigPath(): string {
+  return path.join(resolveStateDir(), NODE_HOST_FILE);
+}
+
+function normalizeConfig(config: Partial<NodeHostConfig> | null): NodeHostConfig {
+  const base: NodeHostConfig = {
+    version: 1,
+    nodeId: "",
+    token: config?.token,
+    displayName: config?.displayName,
+    gateway: config?.gateway,
+  };
+  if (config?.version === 1 && typeof config.nodeId === "string") {
+    base.nodeId = config.nodeId.trim();
+  }
+  if (!base.nodeId) {
+    base.nodeId = crypto.randomUUID();
+  }
+  return base;
+}
+
+export async function loadNodeHostConfig(): Promise<NodeHostConfig | null> {
+  const filePath = resolveNodeHostConfigPath();
+  try {
+    const raw = await fs.readFile(filePath, "utf8");
+    const parsed = JSON.parse(raw) as Partial<NodeHostConfig>;
+    return normalizeConfig(parsed);
+  } catch {
+    return null;
+  }
+}
+
+export async function saveNodeHostConfig(config: NodeHostConfig): Promise<void> {
+  const filePath = resolveNodeHostConfigPath();
+  await fs.mkdir(path.dirname(filePath), { recursive: true });
+  const payload = JSON.stringify(config, null, 2);
+  await fs.writeFile(filePath, `${payload}\n`, { mode: 0o600 });
+  try {
+    await fs.chmod(filePath, 0o600);
+  } catch {
+    // best-effort on platforms without chmod
+  }
+}
+
+export async function ensureNodeHostConfig(): Promise<NodeHostConfig> {
+  const existing = await loadNodeHostConfig();
+  const normalized = normalizeConfig(existing);
+  await saveNodeHostConfig(normalized);
+  return normalized;
+}
+