deepseek-ai/deepseek-harness · error · Error

subagent request was aborted before child publication

Error message

subagent request was aborted before child publication

What it means

Error "subagent request was aborted before child publication" thrown in deepseek-ai/deepseek-harness.

Source

Thrown at packages/subagent/subagent-in-process-driver/src/index.ts:107

}

/**
 * Establish and drive one in-process one-shot child. Fulfillment means the agent
 * is already published in the registry and transfers its turn, cancellation,
 * and disposal work through the returned run. Rejection means the agent
 * factory's unpublished creation transaction reached quiescence without
 * publishing a child. Every start appends its resolved descriptor inside the
 * child's initial turn.
 * @param request - the trusted typed start request, including its required signal.
 * @param options - the optional fork seed.
 * @returns a published holder-owned run.
 */
export async function startInProcessRun(
  request: ResolvedSubagentStartRequest,
  options: InProcessRunOptions,
): Promise<SubagentRun> {
  assertSubagentMaxDepth(request.maxDepth)
  if (request.signal.aborted) throw prePublicationAbort()
  const parent = request.parent
  const childDepth = resolveChildDepth(parent, request.maxDepth)

  const childId = SessionId(randomUUID())
  const seed = options.seed
  const activationBoundary = seed?.length ?? 0

  // Capture before the first await: a later parent switch belongs to the
  // parent's future.
  const inherited = captureDelegatedPolicyOverrides(parent)

  let structured: StructuredAttachment | undefined
  const setup = (childCtx: Context): void => {
    appendDelegatedPolicyOverrides((childCtx.agent as Agent).session, inherited)
    applyChildComposition(childCtx, parent, {
      persona: request.persona,
      toolFilter: request.toolFilter,
    })

View on GitHub (pinned to b150a551b8)

Solutions

1. Retry the subagent request and do not abort before the child is published.

When it happens

Trigger: Thrown at packages/subagent/subagent-in-process-driver/src/index.ts:107 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/196238e5abefe6be. Report an issue: GitHub.