export type UpdatePolicy = 'off' | 'warn' | 'error' | 'force';
export declare function getCurrentVersion(): string | null;
export declare function semverGt(a: string, b: string): boolean;
/** Resolve the effective policy: 'auto' → warn when interactive, error when programmatic. */
export declare function resolvePolicy(): UpdatePolicy;
/** Run the self-update (visible npm output). Returns true on success. */
export declare function runUpdate(): boolean;
/**
 * Startup update check. Best-effort, gated by policy. Only runs for real global installs
 * (skips source/dev runs). Never throws.
 */
export declare function checkForUpdate(): Promise<void>;
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