deepseek-ai/deepseek-harness · error · Error

session agent was disposed outside the server: ${params.sess

Error message

session agent was disposed outside the server: ${params.sessionId}

What it means

Error "session agent was disposed outside the server: ${params.sessionId}" thrown in deepseek-ai/deepseek-harness.

Source

Thrown at packages/sdk/server/src/server.ts:138

    if (!this.hasAdapterFor(this.provider)) {
      if (this.provider !== 'deepseek-official') throw new Error(`no adapter registered for provider "${this.provider}"`)
      this.llmFiber = await this.ctx.plugin(LlmDeepSeek, {})
    }
    return { serverInfo: { name: 'deepseek-harness-sdk-runtime', version: '0.0.1' } }
  }

  /**
   * Queue one identified prompt without assigning later activity to it.
   * @param params - target session and user content.
   * @returns the durable message identity.
   */
  async prompt(params: SessionPromptParams): Promise<SessionPromptResult> {
    const rec = await this.getOrCreateSession(params.sessionId)
    // An agent-loop-only reload disposes the loop's agents while this record
    // survives; a retained agent accepts followup() silently, so validate the
    // record against the live registry before delivery (as the ACP bridge does).
    if (this.ctx.agents.get(rec.handle.agent.id) !== rec.handle.agent) {
      throw new Error(`session agent was disposed outside the server: ${params.sessionId}`)
    }
    const message = createUserMessage({ content: params.contentBlocks, source: { kind: 'user' } })
    rec.handle.agent.followup(message)
    return { messageId: message.id }
  }

  /**
   * Dispose server-owned agents, adapter, and subscriptions to quiescence.
   * The surrounding context remains running.
   * @returns empty JSON-RPC result.
   */
  shutdown(): Promise<Record<string, never>> {
    this.shutdownTask ??= this.performShutdown()
    return this.shutdownTask
  }

  private async performShutdown(): Promise<Record<string, never>> {
    this.shuttingDown = true

View on GitHub (pinned to b150a551b8)

Solutions

1. Do not dispose the session agent directly; close sessions through the SDK server API.

When it happens

Trigger: Thrown at packages/sdk/server/src/server.ts:138 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/3d5a0f032d9d00d2. Report an issue: GitHub.