Swarm

{
  tools: {
    swarm: {
      enabled: true,
      maxConcurrent: 8,
      maxChildrenPerGroup: 50,
      maxTotalPerGroup: 200,
      waitTimeoutSecondsMax: 600,
      defaultAgentId: "",
    },
  },
}

{
  tools: {
    swarm: true,
  },
}

{
  tools: {
    codeMode: true,
    swarm: true,
  },
}

type AgentRunOptions = {
  label?: string;
  model?: string;
  thinking?: string;
  fastMode?: boolean | "auto";
  agentId?: string;
  schema?: Record<string, unknown>;
  phase?: string;
};

agents.run(prompt: string, options?: AgentRunOptions & { schema?: undefined }): Promise<string>;
agents.run<T>(prompt: string, options: AgentRunOptions & { schema: Record<string, unknown> }): Promise<T>;
phase(title: string): void;
log(message: string): void;

const reportSchema = {
  type: "object",
  properties: {
    finding: { type: "string" },
    evidence: { type: "array", items: { type: "string" } },
    confidence: { type: "number" },
  },
  required: ["finding", "evidence", "confidence"],
  additionalProperties: false,
};

const topics = ["authentication", "storage", "recovery"];
phase("Independent review");

const reports = await Promise.all(
  topics.map((topic) =>
    agents.run(`Review the ${topic} path. Return one finding with evidence.`, {
      label: `review-${topic}`,
      thinking: "high",
      fastMode: "auto",
      schema: reportSchema,
    }),
  ),
);

phase("Synthesis");
log(`Collected ${reports.length} independent reports.`);

return await agents.run(
  `Reconcile these reports and explain disagreements:\n${JSON.stringify(reports)}`,
  { label: "synthesis" },
);

const gateSchema = {
  type: "object",
  properties: {
    ready: { type: "boolean" },
    reason: { type: "string" },
    nextAction: { type: "string" },
  },
  required: ["ready", "reason", "nextAction"],
  additionalProperties: false,
};

let pass = 0;
let decision = { ready: false, reason: "Not checked", nextAction: "Review" };

while (!decision.ready && pass < 4) {
  pass += 1;
  phase(`Decision pass ${pass}`);
  decision = await agents.run(
    `Check whether the release evidence is complete. Previous decision: ${JSON.stringify(decision)}`,
    {
      label: `release-gate-${pass}`,
      schema: gateSchema,
    },
  );
  log(decision.reason);
}

if (!decision.ready) {
  throw new Error(`Gate still closed after ${pass} passes: ${decision.nextAction}`);
}

return decision;

{
  tools: { swarm: { enabled: true, defaultAgentId: "worker" } },
  agents: {
    list: [
      {
        id: "main",
        default: true,
        subagents: { allowAgents: ["worker"] },
      },
      { id: "worker", tools: { swarm: false } },
    ],
  },
}

const plan = await agents.run("Plan this job as independent tasks.", {
  schema: {
    type: "object",
    properties: { tasks: { type: "array", items: { type: "string" } } },
    required: ["tasks"],
    additionalProperties: false,
  },
});
return await Promise.all(plan.tasks.map((task) => agents.run(task)));

const tasks = [
  "Check the authentication path.",
  "Check the storage path.",
  "Check the recovery path.",
];

const launches = await Promise.all(
  tasks.map((task, index) =>
    tools.sessions_spawn({
      task,
      collect: true,
      label: `review-${index + 1}`,
    }),
  ),
);

for (const launch of launches) {
  if (launch.status !== "accepted") {
    throw new Error(launch.error ?? "Collector spawn was not accepted.");
  }
}

const pending = new Set(launches.map((launch) => launch.runId));
const completed = [];

while (pending.size > 0) {
  const ids = [...pending].slice(0, 1000);
  const batch = await tools.agents_wait({
    ids,
    timeoutSeconds: 30,
  });

  // Rotate this bounded window behind ids that have not been checked yet.
  for (const runId of ids) {
    if (pending.delete(runId)) pending.add(runId);
  }

  for (const item of batch.completed) {
    pending.delete(item.runId);
    if (item.status !== "done") {
      throw new Error(item.schemaError ?? item.result ?? `${item.runId}: ${item.status}`);
    }
    completed.push(item); // Process each result as soon as it finishes.
  }

  for (const failure of batch.errors ?? []) {
    pending.delete(failure.runId);
    throw new Error(`${failure.runId}: ${failure.error}`);
  }
}

return completed;

type AgentsWaitResult = {
  completed: Array<{
    runId: string;
    status: "done" | "failed" | "killed" | "timeout";
    result: string;
    structured?: unknown;
    schemaError?: string;
    sessionKey: string;
    label?: string;
    usage?: { inputTokens: number; outputTokens: number };
  }>;
  pending: string[];
  errors?: Array<{
    runId: string;
    error: "not_found" | "not_owner";
  }>;
};