feat(exec-events): bead-2 - async exec event context

src/infra/exec-events-context.ts

@@ -0,0 +1,23 @@
+import { AsyncLocalStorage } from "node:async_hooks";
+import type { ExecEventContext } from "./exec-events.js";
+
+const execEventContextStorage = new AsyncLocalStorage<ExecEventContext>();
+
+function hasContextValues(context: ExecEventContext | undefined): boolean {
+  if (!context) return false;
+  return Boolean(context.runId || context.toolCallId || context.sessionKey);
+}
+
+export function runWithExecEventContext<T>(context: ExecEventContext, fn: () => T): T {
+  const existing = execEventContextStorage.getStore();
+  const shouldBypass = !hasContextValues(context) && !hasContextValues(existing);
+  if (shouldBypass) return fn();
+
+  const merged = existing ? { ...existing, ...context } : { ...context };
+  return execEventContextStorage.run(merged, fn);
+}
+
+export function getExecEventContext(): ExecEventContext | undefined {
+  const store = execEventContextStorage.getStore();
+  return store ? { ...store } : undefined;
+}