Get a brief on external guests before each meeting

from datetime import datetime, timedelta, timezone
from google.oauth2.credentials import Credentials
from googleapiclient.discovery import build
from clickruntime import on_trigger, credentials, http, state, notify, ai

MY_DOMAIN, MY_SLACK_ID = "example.com", "U012ABCDEF"
SKIP = {MY_DOMAIN, "gmail.com", "outlook.com"}

@on_trigger
def run(event):
    now = datetime.now(timezone.utc)
    cal = build("calendar", "v3", credentials=Credentials(credentials.connection("google", "work")), cache_discovery=False)
    events = cal.events().list(calendarId="primary", timeMin=now.isoformat(), timeMax=(now + timedelta(minutes=35)).isoformat(),
                               singleEvents=True).execute().get("items", [])
    briefed = set(state.get("briefed") or [])
    for ev in events:
        domains = {a["email"].split("@")[1] for a in ev.get("attendees", [])} - SKIP
        if not domains or ev["id"] in briefed:
            continue
        sites = "\n\n".join(f"{d}:\n{http.get(f'https://{d}', timeout=10).text[:3000]}" for d in domains)
        brief = ai.generate(f"Write a 3-line brief per company for a meeting:\n{sites}", max_output_tokens=400).text
        notify.slack(f"Brief for *{ev['summary']}*:\n{brief}", channel=MY_SLACK_ID)
        briefed.add(ev["id"])
    state.set("briefed", list(briefed)[-500:])
    return {"meetings": len(events)}