deepseek-ai/deepseek-harness · error

subagent-claude-code "${this.name}": child run failed (${sto

Error message

subagent-claude-code "${this.name}": child run failed (${stopReason}): %o

What it means

Error "subagent-claude-code "${this.name}": child run failed (${stopReason}): %o" thrown in deepseek-ai/deepseek-harness.

Source

Thrown at packages/subagent/subagent-claude-code/src/index.ts:114

        throw new Error(
          'subagent-claude-code: request was aborted before SDK startup',
        )
      }
      const failure = claudeCodeStartupFailure(error)
      this.ctx.logger.warn(
        `subagent-claude-code "${this.name}": child start failed: %o`,
        failure,
      )
      throw failure
    }
    const spec: ClaudeCodeRunSpec = {
      cwd,
      permissionMode: this.config.permissionMode,
      env: this.config.env,
      disposeGraceMs: this.config.disposeGraceMs,
      spawn: spawnSpec => this.ctx.subprocess.spawn(spawnSpec),
      onError: (error, stopReason) => {
        this.ctx.logger.warn(
          `subagent-claude-code "${this.name}": child run failed (${stopReason}): %o`,
          error,
        )
      },
    }
    return startClaudeCodeRun(request, spec)
  }
}

/**
 * Register one Profile-named Claude Code provider.
 * @param ctx - context carrying shared subagent and subprocess services.
 * @param config - registry name, permission mode, child environment, and disposal grace.
 */
export function apply(ctx: Context, config: Config): void {
  const resolved: ResolvedConfig = {
    providerName: config.providerName ?? DEFAULT_PROVIDER_NAME,
    env: config.env as Record<string, string>,

View on GitHub (pinned to b150a551b8)

Solutions

1. Review the child run output for the reported stopReason; fix the child agent error and retry the subagent task.

When it happens

Trigger: Thrown at packages/subagent/subagent-claude-code/src/index.ts:114 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/cf379e72e320e13c. Report an issue: GitHub.