Errors

import requests

resp = requests.post(f"{API}/excel/generate", headers=headers, json=body)
if not resp.ok:
    err = resp.json()
    code = err.get("error", "unknown")
    msg = err.get("message", "")

    if code == "preflight_failed":
        # Fix the prompt or attach missing assets
        print(f"Rejected: {msg}")
    elif code == "insufficient_credits":
        # Show a billing prompt to the user
        redirect_to_billing()
    elif code == "rate_limit_exceeded":
        # Honor Retry-After
        retry_after = int(resp.headers.get("Retry-After", "30"))
        time.sleep(retry_after)
        # then retry
    elif resp.status_code >= 500:
        # Transient — retry with exponential backoff
        retry_with_backoff()
    else:
        # Permanent — don't retry
        raise RuntimeError(f"{code}: {msg}")

const resp = await fetch(`${API}/excel/generate`, {
  method: "POST", headers, body: JSON.stringify(body),
});
if (!resp.ok) {
  const err = await resp.json();
  const { error: code, message } = err;

  switch (code) {
    case "preflight_failed":
      throw new ValidationError(message);
    case "insufficient_credits":
      return redirectToBilling();
    case "rate_limit_exceeded":
      const retryAfter = Number(resp.headers.get("Retry-After") || "30");
      await sleep(retryAfter * 1000);
      // retry
      break;
    default:
      if (resp.status >= 500) {
        await retryWithBackoff();
      } else {
        throw new Error(`${code}: ${message}`);
      }
  }
}