Tweet new articles from a news feed

import xml.etree.ElementTree as ET
from clickruntime import on_trigger, report_fetched, state, http, credentials, ai

FEED = "https://example.com/news/rss"

@on_trigger
def run(event):
    posted = set(state.get("posted") or [])
    items = [i for i in ET.fromstring(http.get(FEED).content).iter("item") if i.findtext("link") not in posted]
    report_fetched(len(items))
    if not items:
        return {"summary": "No new items"}
    auth = {"Authorization": "Bearer " + credentials.connection("x", "main")}
    for item in items[:5]:
        link = item.findtext("link")
        line = ai.generate(f"Write a one-line tweet (max 200 chars, no hashtags) for this headline: {item.findtext('title')}", max_output_tokens=80).text.strip()
        tweet = {"text": f"{line[:250]} {link}"}
        image = item.find("enclosure")
        if image is not None and image.get("type", "").startswith("image/"):
            media = http.post("https://api.x.com/2/media/upload", headers=auth,
                              files={"media": http.get(image.get("url")).content}, data={"media_category": "tweet_image"}).json()
            tweet["media"] = {"media_ids": [media["data"]["id"]]}
        http.post("https://api.x.com/2/tweets", headers=auth, json=tweet).raise_for_status()
        posted.add(link)
    state.set("posted", list(posted)[-500:])
    return {"posted": len(items[:5])}