/** Map a runtime's replace/append system prompt onto Codex's thread-start/resume instructions fields. */
export declare function codexThreadInstructions(options: {
    systemPromptReplace?: string | undefined;
    systemPromptAppend?: readonly string[] | undefined;
}): {
    baseInstructions?: string;
    developerInstructions?: string;
};
//# sourceMappingURL=system-prompt.d.ts.map