def my_llm_parse(system_prompt: str, user_content: str) -> list[dict]:
    ...  # user's LLM client, returns the kept-entries JSON list

toc_df = reconstruct_toc_from_body(
    line_df,
    span_df=span_df,
    mode="no_toc",
    max_passes=3,
    llm_parse=my_llm_parse,
)