deepseek-ai/deepseek-harness · error · SubagentError

subagent-delivery-unavailable

subagent-delivery-unavailable

Error message

subagent follow-up is temporarily unavailable

What it means

Error "subagent follow-up is temporarily unavailable" thrown in deepseek-ai/deepseek-harness.

Source

Thrown at packages/host/apiproxy/src/api-proxy.ts:870

  if (error instanceof SubagentError) {
    switch (error.code) {
      case 'NOT_RESUMABLE':
        return err(request, {
          code: 'subagent-not-resumable',
          message: 'subagent cannot be resumed',
          details: { childSessionId },
        })
      case 'UNAUTHORIZED':
        return err(request, {
          code: 'subagent-unauthorized',
          message: 'subagent does not belong to this parent',
          details: { childSessionId },
        })
      case 'DRAINING':
      case 'ACTIVATION_CLOSING':
      case 'CONTINUATION_UNAVAILABLE':
      case 'PERSISTENCE_UNAVAILABLE':
        return err(request, {
          code: 'subagent-delivery-unavailable',
          message: 'subagent follow-up is temporarily unavailable',
          details: { childSessionId },
        })
      default:
        break
    }
  }
  return err(request, { code: 'internal', message: 'subagent prompt failed', details: {} })
}

/** Stable RPC face of the missing projections capability, shared by every catalog read path. */
function projectionsUnavailableError(): RpcError {
  return {
    code: 'internal',
    message: 'subagent catalog is unavailable: this deployment does not mount the sessionProjections registry (load @deepseek-ai/dsh-session-projection)',
    details: {},
  }

View on GitHub (pinned to b150a551b8)

Solutions

1. Wait for the in-flight state to settle and retry the subagent follow-up.

When it happens

Trigger: Thrown at packages/host/apiproxy/src/api-proxy.ts:870 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/a484e0e8f0dc9687. Report an issue: GitHub.