Function add

agents/reading-agent/main.py:1619–1622

(candidate: str)

    def add(candidate: str) -> None:
        cleaned = _clean_text(candidate)
        if cleaned.startswith(("http://", "https://")) and cleaned not in candidates:
            candidates.append(cleaned)

    if "nature.com" in host and path.startswith("/articles/") and not path.lower().endswith(".pdf"):
        add(urljoin(f"{parsed.scheme}://{parsed.netloc}", f"{path}_reference.pdf"))
        add(urljoin(f"{parsed.scheme}://{parsed.netloc}", f"{path}.pdf"))