Invent and Simplify Questions

# pseudocode - not calling real SDKs
ACCOUNTS = [...]            # list of account ids or role ARNs
CPU_THRESHOLD = 2.0        # percent average CPU over 72h considered negligible
WINDOW_HOURS = 72
PAGE_SIZE = 100
RATE_LIMIT_BACKOFF = [1,2,4,8]

def assume_role(account): ...
def paginate_list(func, params):
    next_token = None
    while True:
        resp = func(**params, NextToken=next_token, MaxResults=PAGE_SIZE)
        for item in resp.get("Items", []):
            yield item
        next_token = resp.get("NextToken")
        if not next_token: break

def safe_call(callable, *args, **kwargs):
    for wait in RATE_LIMIT_BACKOFF:
        try:
            return callable(*args, **kwargs)
        except RateLimitError:
            sleep(wait)
    raise

def analyze_instance(account, instance):
    metrics = safe_call(get_cpu_metrics, instance.id, start=now()-72h, end=now())
    avg_cpu = compute_time_weighted_avg(metrics)
    owner = get_owner_from_tags_or_cmdb(instance)
    return { "account": account, "id": instance.id, "type": instance.type,
             "avg_cpu": avg_cpu, "owner": owner }

report = []
for acct in ACCOUNTS:
    creds = assume_role(acct)
    for inst in paginate_list(list_instances_using_creds(creds), params={}):
        info = analyze_instance(acct, inst)
        if info["avg_cpu"] <= CPU_THRESHOLD:
            info["recommended_action"] = "notify + schedule manual review (dry-run)"
            report.append(info)

write_report(report, format="csv")  # include contact, tags, launch time, recommendation
# safety: never terminate; add approval workflow links and TTL for re-evaluation