deepseek-ai/deepseek-harness · error · TypeError

time-context: refreshIntervalMs must be a non-negative safe

Error message

time-context: refreshIntervalMs must be a non-negative safe integer, got ${String(refreshIntervalMs)}

What it means

Error "time-context: refreshIntervalMs must be a non-negative safe integer, got ${String(refreshIntervalMs)}" thrown in deepseek-ai/deepseek-harness.

Source

Thrown at packages/context/time-context/src/index.ts:133

  formatter: Intl.DateTimeFormat,
  timeZone: string,
  browserContext: BrowserTimeZoneContext,
): string {
  const elapsed = previous === undefined ? 'unavailable' : formatDuration(now - previous)
  const baseline = step === 1 ? 'model-visible message' : 'step context'
  const browserText = renderBrowserTimeZoneContext(browserContext)
  return `Time sampled while preparing turn ${turn}, step ${step}: ${formatTimestamp(now, formatter, timeZone)}\n`
    + `${browserText}\n`
    + `Elapsed since the preceding ${baseline}: ${elapsed}.`
}

/** Reject refresh intervals that cannot represent an exact elapsed-millisecond threshold. */
function validateRefreshInterval(refreshIntervalMs: number | undefined): void {
  if (refreshIntervalMs !== undefined && (
    !Number.isSafeInteger(refreshIntervalMs)
    || refreshIntervalMs < 0
  )) {
    throw new TypeError(
      `time-context: refreshIntervalMs must be a non-negative safe integer, got ${String(refreshIntervalMs)}`,
    )
  }
}

/**
 * Register a prepended pre-step listener for the lifetime of `ctx`.
 * @param ctx - plugin context; the listener is disposed with it.
 * @param config - time zone and durable refresh scheduling configuration.
 * @throws when the refresh interval is invalid or the configured or process time zone cannot be resolved.
 */
export function apply(ctx: Context, config: Config): void {
  const timeZone = config.timeZone
  const refreshIntervalMs = config.refreshIntervalMs
  validateRefreshInterval(refreshIntervalMs)
  let fallbackFormatter: Intl.DateTimeFormat
  try {
    fallbackFormatter = createTimestampFormatter(timeZone)

View on GitHub (pinned to b150a551b8)

Solutions

1. Set refreshIntervalMs to a non-negative safe integer.

When it happens

Trigger: Thrown at packages/context/time-context/src/index.ts:133 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of deepseek-ai/deepseek-harness@b150a551b8 (2026-08-24). Data as JSON: /api/errors/415fb59b5dc0eb08. Report an issue: GitHub.