Send new sign-ups a welcome email matched to what they need

import base64
from google.oauth2.credentials import Credentials
from googleapiclient.discovery import build
from clickruntime import on_event, credentials, http, ai

HOST, NS = "https://kb-abc123.svc.aped-1234.pinecone.io", "product"  # your index host and namespace
def search(text, k=5):
    r = http.post(f"{HOST}/records/namespaces/{NS}/search", json={"query": {"inputs": {"text": text}, "top_k": k}}, headers={
        "Api-Key": credentials.secret("PINECONE_API_KEY"), "X-Pinecone-API-Version": "2025-04"}).json()
    return [h["fields"] for h in r["result"]["hits"]]
def send(to, subject, body):
    raw = f"To: {to}\r\nSubject: {subject}\r\nContent-Type: text/plain; charset=utf-8\r\n\r\n{body}"
    build("gmail", "v1", credentials=Credentials(credentials.connection("google", "work")), cache_discovery=False).users() \
        .messages().send(userId="me", body={"raw": base64.urlsafe_b64encode(raw.encode()).decode()}).execute()

@on_event
def handle(event):
    s = event.json or {}
    if not s.get("email"):
        return {"skipped": "no email"}
    need = s.get("goal") or s.get("role") or "getting started"
    info = "\n\n".join(h["chunk_text"] for h in search(need, 4))
    body = ai.generate(f"Write a 100-word welcome email from Sam at Acme Scheduling to {s.get('name', 'there')}, who wants: "
                       f"{need}. Point to the most relevant feature from this product info, with one next step. Body only."
                       f"\n{info}", max_output_tokens=250).text
    send(s["email"], "Welcome to Acme Scheduling", body)
    return {"sent": True}