Clear race timers so waits never outlive the operation

index.js

@@ -66,7 +66,10 @@ export function apply(ctx, config = {}) {
 
     // At the end of a turn: deliver late advice; a blocker forces one more step.
     disposers.push(agent.ctx.on('agent/turn-stopping', async ({ signal }) => {
-      if (st.pending) await Promise.race([st.pending, new Promise((r) => setTimeout(r, cfg.blocking ? cfg.timeoutMs : 4000))])
+      if (st.pending) {
+        let t
+        await Promise.race([st.pending, new Promise((r) => { t = setTimeout(r, cfg.blocking ? cfg.timeoutMs : 4000) })]).finally(() => clearTimeout(t))
+      }
       const notes = st.queue.splice(0)
       const block = notes.find((n) => n.verdict === 'blocker')
       if (block && !signal?.aborted) {