/**
 * Resolve the local dev user's email for the current CLI invocation.
 *
 * Returns the resolved email, or `undefined` when no real identity is
 * available. Callers should let the downstream "no authenticated user"
 * error propagate — its message points the user at the two fixes
 * (sign in via the running app, or set `AGENT_USER_EMAIL`).
 */
export declare function resolveDevUserEmail(): Promise<string | undefined>;