export type ApiKeyName = "openai" | "huggingface" | "pexels";
/**
 * Read a stored API key. Returns undefined when none is saved.
 * The key store is cached after first load.
 */
export declare function getStoredApiKey(name: ApiKeyName): string | undefined;
/**
 * Persist an API key. Trims whitespace; throws if empty.
 */
export declare function setStoredApiKey(name: ApiKeyName, key: string): void;
/**
 * Convenience: env var first, then the stored value. The order matches
 * how the vision modules already work — they default to the env var,
 * and now they get a sensible fallback when it's not set.
 */
export declare function resolveApiKey(envVar: string, name: ApiKeyName): string | undefined;
export declare const API_KEYS_FILE: string;
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