v1.0.9-preview.1

Feature: Agent Factories authoring surface [experimental]

Agent Factories let a trusted extension declare a JavaScript closure that orchestrates a fleet of subagents, then invoke it by name. The runtime invokes the factory closure over a reverse RPC call, passing primitives to spawn subagents, journal results (so a resumed run replays completed work for free), compose work in parallel or as a pipeline, and report progress. (#2114)

import { defineFactory, joinSession } from "`@github/copilot-sdk`/extension";

const myFactory = defineFactory({
  meta: { name: "my-factory", description: "Orchestrates subagents" },
  run: async ({ spawnAgent, journal }) => {
    const result = await spawnAgent({ prompt: "Summarize the repo" });
    return journal("done", result);
  },
});

const session = await joinSession({ factories: [myFactory] });
const run = await session.factory.run({ name: "my-factory", input: {} });

Everything is gated behind the runtime's agent_factories flag and billing gate, and all public types are marked @experimental.

New contributors

• @nytron88 made their first contribution in #2117
• @syedkazmi14 made their first contribution in #2101
• @smz202000 made their first contribution in #2019

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