feat(auth): oauth multi-account failover

Author: gwizz

packages/opencode/src/auth/context.ts

@@ -0,0 +1,21 @@
+import { AsyncLocalStorage } from "async_hooks"
+
+type Store = {
+  oauthRecordByProvider: Map<string, string>
+}
+
+const storage = new AsyncLocalStorage<Store>()
+
+export function getOAuthRecordID(providerID: string): string | undefined {
+  return storage.getStore()?.oauthRecordByProvider.get(providerID)
+}
+
+export function withOAuthRecord<T>(providerID: string, recordID: string, fn: () => T): T {
+  const current = storage.getStore()
+  const next: Store = {
+    oauthRecordByProvider: new Map(current?.oauthRecordByProvider ?? []),
+  }
+  next.oauthRecordByProvider.set(providerID, recordID)
+
+  return storage.run(next, fn)
+}