/**
 * The caller's canonical person id (`prs_*`), which names the heartbeat topic.
 *
 * Mirrors `resolveCallerPersonUid` in hq-cli (`src/utils/vault-api.ts`) and the
 * backend's selection rule: the oldest person entity, ties broken by uid. The
 * `hq-outpost-heartbeat` bin needs it without the hq CLI.
 */
export declare function resolveCallerPersonUid(token: string, apiBaseUrl: string, fetchImpl?: typeof fetch): Promise<string>;
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