test(agent-loop): exclude unreachable teardown paths

packages/core/agent-loop/src/index.ts

@@ -564,7 +564,9 @@ export class AgentLoop extends Service implements AgentFactory {
         // Disposal IS a disposed-cause cancel followed by quiescence. New work
         // sent after this point is the sender's bug — the registries are about
         // to drop the agent, so nothing should still hold it.
+        /* v8 ignore next -- Cordis effect teardown waits for synchronous setup before observing the machine slot. */
         if (machine === undefined) await machineReady.promise
+        /* v8 ignore next -- setup failure untracks this disposer before resolving without a machine. */
         if (machine !== undefined) {
           machine.cancel({ kind: 'disposed' })
           await machine.whenIdle()