deepseek-ai/deepseek-harness · error · WorkflowError

AGENT_RESULT

AGENT_RESULT

Error message

child agent run failed: ${renderThrown(error)}

What it means

Error "child agent run failed: ${renderThrown(error)}" thrown in deepseek-ai/deepseek-harness.

Source

Thrown at packages/workflow/workflow-worker-thread/src/runtime.ts:315

      }
      const info: WorkflowAgentInfo = { seq, label, ...phase !== undefined ? { phase } : {}, childId: SessionId(run.id) }
      this.observer.agentStart(info)
      try {
        let result
        try {
          result = await run.result
        } catch (error: unknown) {
          // A rejected child result is an INFRASTRUCTURE fault relayed by the
          // host — distinct from a child that failed and resolved. Pair the
          // lifecycle before propagating, and propagate FATAL: an ordinary
          // throw would dissolve to a per-item null inside the combinators,
          // and a broken provider must not read as a failed child.
          if (this.isCancelled()) {
            this.observer.agentEnd({ ...info, outcome: 'cancelled' })
            throw this.cancelledError()
          }
          this.observer.agentEnd({ ...info, outcome: 'failed' })
          throw new WorkflowError(`child agent run failed: ${renderThrown(error)}`, 'AGENT_RESULT', { cause: error })
        }
        if (result.stopReason === 'completed') {
          if (opts.schema !== undefined) {
            // The provider honored outputSchema (capability-gated at start), so
            // a completed run without a structured value is a child failure.
            if (result.structured === undefined) {
              this.observer.agentEnd({ ...info, outcome: 'failed' })
              return null
            }
            this.observer.agentEnd({ ...info, outcome: 'completed' })
            return result.structured
          }
          this.observer.agentEnd({ ...info, outcome: 'completed' })
          return outputText(result.output)
        }
        // A cancelled RUN kills the script; a child that failed for its own
        // reasons resolves null (scripts .filter(Boolean) per the CC contract).
        if (this.isCancelled()) {

View on GitHub (pinned to b150a551b8)

Solutions

1. Read the embedded child-run error and fix the child agent's failure (provider error, prompt issue); then re-run.

When it happens

Trigger: Thrown at packages/workflow/workflow-worker-thread/src/runtime.ts:315 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/75e39e52176c38f1. Report an issue: GitHub.