Send new feed posts to Telegram, never twice

import feedparser
from clickruntime import on_trigger, credentials, http, ai, report_fetched

FEED = "https://blog.northwind.example/feed"
CHANNEL = "@northwind_updates"
SUPABASE = "https://your-project.supabase.co/rest/v1"

def sb(method, path, **kw):
    key = credentials.secret("SUPABASE_KEY")
    r = http.request(method, f"{SUPABASE}/{path}", **kw, headers={"apikey": key, "Authorization": f"Bearer {key}", "Prefer": "return=representation,resolution=merge-duplicates"})
    return r.raise_for_status() or (r.json() if r.content else None)

def tg(method, **params):
    return http.post(f"https://api.telegram.org/bot{credentials.secret('TELEGRAM_BOT_TOKEN')}/{method}", json=params).json()

@on_trigger
def run(event):
    items = feedparser.parse(http.get(FEED).content).entries[:30]
    ids = [e.get("id") or e.link for e in items]
    known = {r["id"] for r in sb("GET", "posts", params={"select": "id", "id": f"in.({','.join(chr(34) + i + chr(34) for i in ids)})"})} if ids else set()
    new = [e for e, i in zip(items, ids) if i not in known][::-1]
    report_fetched(len(new))
    if not new:
        return {"summary": "Nothing new"}
    sb("POST", "posts", json=[{"id": e.get("id") or e.link, "title": e.title, "url": e.link} for e in new])
    for e in new:
        text = f"<b>{e.title}</b>\n{e.link}"
        try:
            text += "\n" + ai.generate(f"One-line summary: {e.get('summary', '')[:1500]}", max_output_tokens=40).text
        except ai.AIError:
            pass
        tg("sendMessage", chat_id=CHANNEL, text=text, parse_mode="HTML")
    return {"sent": len(new)}