Persist subagent registry across restarts

src/agents/subagent-registry.store.ts

@@ -0,0 +1,47 @@
+import path from "node:path";
+
+import { STATE_DIR_CLAWDBOT } from "../config/paths.js";
+import { loadJsonFile, saveJsonFile } from "../infra/json-file.js";
+import type { SubagentRunRecord } from "./subagent-registry.js";
+
+export type PersistedSubagentRegistryVersion = 1;
+
+type PersistedSubagentRegistry = {
+  version: 1;
+  runs: Record<string, SubagentRunRecord>;
+};
+
+const REGISTRY_VERSION = 1 as const;
+
+export function resolveSubagentRegistryPath(): string {
+  return path.join(STATE_DIR_CLAWDBOT, "subagents", "runs.json");
+}
+
+export function loadSubagentRegistryFromDisk(): Map<string, SubagentRunRecord> {
+  const pathname = resolveSubagentRegistryPath();
+  const raw = loadJsonFile(pathname);
+  if (!raw || typeof raw !== "object") return new Map();
+  const record = raw as Partial<PersistedSubagentRegistry>;
+  if (record.version !== REGISTRY_VERSION) return new Map();
+  const runsRaw = record.runs;
+  if (!runsRaw || typeof runsRaw !== "object") return new Map();
+  const out = new Map<string, SubagentRunRecord>();
+  for (const [runId, entry] of Object.entries(runsRaw)) {
+    if (!entry || typeof entry !== "object") continue;
+    const typed = entry as SubagentRunRecord;
+    if (!typed.runId || typeof typed.runId !== "string") continue;
+    out.set(runId, typed);
+  }
+  return out;
+}
+
+export function saveSubagentRegistryToDisk(
+  runs: Map<string, SubagentRunRecord>,
+) {
+  const pathname = resolveSubagentRegistryPath();
+  const out: PersistedSubagentRegistry = {
+    version: REGISTRY_VERSION,
+    runs: Object.fromEntries(runs.entries()),
+  };
+  saveJsonFile(pathname, out);
+}