fix(models): synchronize canonical runtime selection

nanobot/agent/loop.py

@@ -533,9 +533,15 @@ class AgentLoop:
         self.subagents.max_iterations = self.max_iterations
 
     def invalidate_runtime_config(self) -> None:
-        """Invalidate runtime config and notify clients to refresh its catalog."""
+        """Invalidate runtime config for lazy refresh at the next admission."""
         self.runtime_resolver.invalidate()
-        self._publish_runtime_selection(self.runtime_resolver.runtime)
+
+    def refresh_runtime_config(self) -> LLMRuntime:
+        """Refresh runtime config now and publish the canonical selection."""
+        self.runtime_resolver.invalidate()
+        runtime = self.runtime_resolver.admit()
+        self._publish_runtime_selection(runtime)
+        return runtime
 
     def runtime_for_session(
         self,
@@ -1787,7 +1793,7 @@ class AgentLoop:
                 session.provider_state = None
                 self.sessions.save(session)
             ctx.input_persisted_early = True
-        ctx.delivery.record_runtime(runtime)
+        await ctx.delivery.runtime_admitted(runtime)
 
         ctx.request_context = self._request_context_for_turn(ctx)
         if ctx.kind is TurnKind.USER:

nanobot/agent/turn_delivery.py

@@ -189,7 +189,15 @@ class TurnDelivery:
                 started_at=started_at,
             )
 
-    def record_runtime(self, runtime: LLMRuntime) -> None:
+    async def runtime_admitted(self, runtime: LLMRuntime) -> None:
+        """Record the immutable runtime and expose it at the lifecycle seam."""
+        if self.route.publish_lifecycle:
+            await self.runtime_event_publisher.turn_runtime_admitted(
+                self.delivery_message,
+                self.session_key,
+                runtime,
+            )
+            return
         self.runtime_event_publisher.record_turn_runtime(self.session_key, runtime)
 
     def record_latency(self, latency_ms: int | None) -> None: