/**
 * Lightweight "is there a newer release?" check shared by the desktop tray and
 * the headless Linux agent. Apps poll the small `/dist/latest` JSON (a few
 * hundred bytes) — NOT the multi-MB binaries — and compare the published
 * `version` against their own. Downloading the actual build only happens when
 * the user explicitly clicks "Download" / runs the install script.
 */
export interface LatestDist {
    /** Latest published version, e.g. "1.0.18". null until a release is published. */
    version: string | null;
    /** Direct download paths (relative to the server origin), null if missing. */
    mac: string | null;
    /**
     * The macOS .pkg installer (the primary mac download once published) —
     * null until a pkg release exists, or when talking to an older server.
     * Optional so existing consumers constructing LatestDist keep compiling;
     * `fetchLatestDist` always fills it in (with an explicit null when absent).
     */
    macPkg?: string | null;
    win: string | null;
    agentLinuxX64: string | null;
    agentLinuxArm64: string | null;
}
/**
 * Compare dotted numeric versions ("1.0.18" vs "1.0.9"). Returns >0 if a>b,
 * <0 if a<b, 0 if equal. Missing/short segments count as 0; non-numeric parts
 * (e.g. a "-beta" suffix) are coerced to 0 so a malformed tag never throws.
 */
export declare function compareVersions(a: string, b: string): number;
/** True when `latest` is a strictly newer version than `current`. */
export declare function isNewerVersion(latest: string, current: string): boolean;
/**
 * Fetch the `/dist/latest` metadata blob. Returns null on any network error,
 * non-2xx, timeout, or malformed body — callers treat null as "couldn't check,
 * assume up to date" and never surface an error to the user.
 */
export declare function fetchLatestDist(serverUrl: string, timeoutMs?: number): Promise<LatestDist | null>;