/**
 * @octomil/browser — Persistent install ID for telemetry resource attributes.
 *
 * Generates a UUID on first SDK initialization and persists it to
 * `localStorage` under the key `octomil_install_id`. On subsequent inits,
 * reads from the persisted value. This provides a stable anonymous
 * identifier for the `octomil.install.id` OTLP resource attribute.
 */
/**
 * Returns the persistent install ID, creating it if necessary.
 *
 * On first call, checks `localStorage` for a stored value. If none exists,
 * generates a new UUID via `crypto.randomUUID()` and persists it. The result
 * is cached in memory for subsequent calls.
 *
 * If `localStorage` is unavailable (e.g., private browsing, SSR), a new
 * random UUID is generated and cached in memory only (not persisted).
 */
export declare function getInstallId(): string;
/**
 * Returns the cached install ID without accessing localStorage.
 *
 * Returns null if `getInstallId()` has not been called yet.
 */
export declare function getCachedInstallId(): string | null;
/**
 * Clears the in-memory cache. Primarily for testing.
 *
 * Does NOT remove the persisted value from localStorage.
 */
export declare function resetInstallIdCache(): void;
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