deepseek-ai/deepseek-harness · error · Error

agent "${entry.id}" was already announced

Error message

agent "${entry.id}" was already announced

What it means

Error "agent "${entry.id}" was already announced" thrown in deepseek-ai/deepseek-harness.

Source

Thrown at packages/core/agent/src/index.ts:555

        this.ctx.logger.warn(`agent "${entry.id}": agent/disposed listener threw: ${String(error)}`)
      }
    }
  }

  /**
   * Announce an agent previously inserted with {@link enter}.
   * @param agent - the live inserted agent to announce.
   * @throws if `agent` is not the exact live registry entry for its id, or its
   *   creation announcement already began (including a reentrant call from a
   *   creation listener).
   */
  announce(agent: Agent): void {
    const entry = this.store.get(agent.id)
    if (entry === undefined || entry.agent !== agent) {
      throw new Error(`agent "${agent.id}" is not live in this registry`)
    }
    if (entry.announced || entry.announcing) {
      throw new Error(`agent "${entry.id}" was already announced`)
    }
    // Mark before dispatch so a listener cannot recursively create a second
    // lifecycle edge; detach still pairs a partially delivered first edge.
    entry.announcing = true
    entry.announced = true
    const args: unknown[] = [entry.carrier, 'agent/created', { agent: entry.agent }]
    try {
      for (const callback of this.ctx.events.dispatch('emit', args)) {
        // A synchronous creation failure vetoes publication and rolls back.
        // Returned-promise rejection happens after this synchronous boundary, so
        // observe and report it instead of leaking an unhandled rejection.
        const returned: unknown = callback(...args)
        void Promise.resolve(returned).catch((error: unknown) => {
          this.ctx.logger.warn(`agent "${entry.id}": agent/created listener rejected: ${String(error)}`)
        })
      }
    } finally {
      entry.announcing = false

View on GitHub (pinned to b150a551b8)

Solutions

1. Announce each agent only once.

When it happens

Trigger: Thrown at packages/core/agent/src/index.ts:555 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/1edfd4fe28625f13. Report an issue: GitHub.