Start client onboarding in Trello when a contract is signed

from clickruntime import on_event, credentials, http, notify, state

LIST_ID = "your-trello-list-id"
CHECKLIST = ["Send welcome email", "Book kickoff call", "Create shared folder", "Request tool access", "Send first invoice"]

@on_event
def handle(event):
    data = event.json or {}
    if data.get("status", data.get("event")) not in ("completed", "signed", "document.completed"):
        return {"skipped": "not a completed contract"}
    if state.get(f"seen:{event.event_id}"):
        return {"skipped": "duplicate"}
    client = data.get("client_name") or data.get("signer_name") or "New client"
    auth = {"key": credentials.secret("TRELLO_KEY"), "token": credentials.secret("TRELLO_TOKEN")}
    card = http.post("https://api.trello.com/1/cards",
                     params={**auth, "idList": LIST_ID, "name": f"Onboard {client}"}).json()
    cl = http.post("https://api.trello.com/1/checklists", params={**auth, "idCard": card["id"], "name": "Onboarding"}).json()
    for item in CHECKLIST:
        http.post(f"https://api.trello.com/1/checklists/{cl['id']}/checkItems", params={**auth, "name": item})
    notify.slack(f"New client signed: *{client}*. Onboarding card: {card['shortUrl']}", channel="#clients")
    state.set(f"seen:{event.event_id}", True)
    return {"card": card["id"]}