deepseek-ai/deepseek-harness · error · TypeError

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

Error message

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

What it means

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

Source

Thrown at packages/context/tmux-context/src/index.ts:202

      && event.data.source.kind === 'plugin'
      && event.data.source.plugin === name) {
      const [block] = event.data.content
      if (block?.type !== 'text') return undefined
      const newline = block.text.indexOf('\n')
      const state = newline === -1 ? '' : block.text.slice(newline + 1)
      return { state, time: event.time }
    }
  }
  return undefined
}

/** 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(
      `tmux-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 - durable refresh scheduling configuration.
 * @throws when the refresh interval is invalid.
 */
export function apply(ctx: Context, config: Config): void {
  const refreshIntervalMs = config.refreshIntervalMs
  validateRefreshInterval(refreshIntervalMs)

  ctx.on('agent/pre-step', async (
    { agent, turn, step, signal },
    next,

View on GitHub (pinned to b150a551b8)

Solutions

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

When it happens

Trigger: Thrown at packages/context/tmux-context/src/index.ts:202 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/ce012bd4c61c0944. Report an issue: GitHub.