Function isRetryableStreamError

src/core/agent.ts:35–42

Transient failures worth auto-retrying: any transport/connection error (no * usable HTTP status — socket reset, DNS, timeout, TLS drop) plus 5xx/408/429 * server responses. Real 4xx client errors (auth, bad request) are not retried.

(error: unknown)

 *  usable HTTP status — socket reset, DNS, timeout, TLS drop) plus 5xx/408/429
 *  server responses. Real 4xx client errors (auth, bad request) are not retried. */
function isRetryableStreamError(error: unknown): boolean {
	const err = error as { status?: number; code?: number | string }
	const status = Number(err?.status ?? err?.code)
	if (Number.isFinite(status) && status !== 0) {
		return status >= 500 || status === 408 || status === 429
	}
	return true
}

function retryBackoffMs(attempt: number): number {
	return Math.min(500 * 2 ** attempt, 8000)