/**
 * Configure multi_agent_v2 thread limits without forcing the feature on.
 *
 * Whether V2 is active is determined at runtime by the model's server-side
 * catalog entry (`ModelInfo.multi_agent_version`).  Forcing `enabled = true`
 * in config breaks models whose API does not support encrypted tool
 * parameters (e.g. gpt-5.5-medium, API-key-only models, third-party
 * providers).  The installer therefore only sets the tuning knob
 * (`max_concurrent_threads_per_session`) so that sessions that DO activate
 * V2 benefit from the higher limit.
 */
export declare function ensureCodexMultiAgentV2Config(config: string): string;