Function overflow

packages/core/test/session-runner.test.ts:1180–1183

()

    Effect.gen(function* () {
      const session = yield* setupOverflowRecovery
      const overflow = () => [
        LLMEvent.stepStart({ index: 0 }),
        LLMEvent.providerError({ message: "prompt too long", classification: "context-overflow" }),
      ]
      responses = [
        overflow(),
        fragmentFixture("text", "text-summary", ["## Goal\n- Recover once"]).completeEvents,