@juspay/neurolink/dist/utils/retryability.js

The pipe layer of an AI nervous system: one interface connecting provider neurons to your application, across three inference types — generate, stream and decide. `decide` returns typed, calibrated judgements from a non-generative model (~400ms, ~$0.00002

/**
 * Shared HTTP retryability constants.
 *
 * Centralises the status-code lists that were duplicated across
 * httpRetryHandler, neurolink.ts, fileDetector.ts, and errorHelpers.
 */
/** Server-side and rate-limiting codes worth retrying. */
export const RETRYABLE_HTTP_STATUS_CODES = [
    408, 429, 500, 502, 503, 504,
];
/** Client-error codes where retrying is pointless. */
export const NON_RETRYABLE_HTTP_STATUS_CODES = [
    400, 401, 403, 404, 405, 409, 422,
];
/** Check whether an HTTP status code is retryable. */
export function isRetryableStatusCode(code) {
    return RETRYABLE_HTTP_STATUS_CODES.includes(code);
}
/** Check whether an HTTP status code is non-retryable. */
export function isNonRetryableStatusCode(code) {
    return NON_RETRYABLE_HTTP_STATUS_CODES.includes(code);
}
/**
 * Detect a deterministic client-error (HTTP 400 / malformed request) signature
 * embedded in a provider error MESSAGE, for cases where the numeric status is
 * not exposed as a structured `status`/`statusCode` field. Vertex/Gemini wrap a
 * 400 INVALID_ARGUMENT inside the message string (e.g. `Google Vertex AI Invalid
 * Request: {"error":{"code":400,"status":"INVALID_ARGUMENT", …}}`), so the
 * object-level status check misses it and the fallback orchestrator keeps
 * retrying the identical, malformed payload on every other provider — they
 * reject it the same way. A 400 means the request itself is bad, so retrying is
 * pointless regardless of provider. Matches only unambiguous markers to avoid
 * misclassifying transient (5xx/429) failures.
 */
export function isDeterministicClientErrorMessage(message) {
    if (!message) {
        return false;
    }
    return (message.includes("INVALID_ARGUMENT") ||
        message.includes("Invalid JSON payload") ||
        /\bInvalid Request\b/i.test(message) ||
        /"code"\s*:\s*400\b/.test(message) ||
        /\b400\s+Bad Request\b/i.test(message));
}