/**
 * Shared utilities for sanitizing OpenAI/Synthetic request parameters
 * before sending them over the wire. CLI "ephemeral" settings often
 * contain UX toggles (context limits, shell replacement, etc.) that
 * must never be forwarded to the API.
 */
export declare function filterOpenAIRequestParams(source: Record<string, unknown> | null | undefined): Record<string, unknown> | undefined;