/**
 * Account rotation — cycles Codex API accounts before each agent spawn.
 *
 * Uses `codex-accounts next` to rotate the active account in ~/.codex/auth.json.
 * Cross-process file lock ensures only one rotation happens at a time, even
 * across multiple MCP server instances on the same machine.
 */
/**
 * Enabled by default; disabled only when CODEX_ROTATE is explicitly "0" or "false".
 */
export declare function isRotationEnabled(): boolean;
/**
 * One-time startup validation for codex-accounts binary.
 */
export declare function validateAccountsBinary(): void;
/**
 * Rotate to the next configured account.
 */
export declare function rotateAccount(): Promise<void>;
/**
 * Best-effort shutdown cleanup.
 */
export declare function cleanupRotationLock(): void;
/**
 * Test helper: reset module state and optionally override lock file location.
 */
export declare function resetForTesting(overrideLockPath?: string): void;
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