feat: wire ara-research-manager into memory consolidation

After _consolidate_memory completes (on /new or auto-compact), spawn
a background ara-pm subagent that runs the ara-research-manager skill
on /workspace/ara-projects/nanobot/. Fire-and-forget via asyncio.create_task.
Silently skips if ara-projects/nanobot/ doesn't exist.

nanobot/agent/loop.py

@@ -1051,9 +1051,33 @@ Respond with ONLY valid JSON, no markdown fences."""
             session.messages = self._trim_to_clean_boundary(session.messages, keep_count) if keep_count else []
             self.sessions.save(session)
             logger.info(f"Memory consolidation done, session trimmed to {len(session.messages)} messages")
+            self._spawn_ara_research_manager()
         except Exception as e:
             logger.error(f"Memory consolidation failed: {e}")
 
+    def _spawn_ara_research_manager(self) -> None:
+        """Fire-and-forget: update the nanobot ARA trace after memory consolidation.
+
+        Uses the SpawnTool which already has channel/chat_id context from the
+        last message. Silently skips if ARA path doesn't exist or spawn fails.
+        """
+        import os
+        ara_path = os.path.join(self.workspace, "ara-projects", "nanobot")
+        if not os.path.isdir(ara_path):
+            return
+        spawn_tool = self.tools.get("spawn")
+        if not isinstance(spawn_tool, SpawnTool):
+            return
+        task = (
+            f"Read /root/.nanobot/workspace/skills/ara-research-manager/SKILL.md "
+            f"and run the per-turn procedure on the nanobot ARA at {ara_path}/. "
+            f"Capture any research events from this session."
+        )
+        asyncio.create_task(
+            spawn_tool.execute(task=task, label="ara-pm", model="claude-haiku-4-5")
+        )
+        logger.debug("ARA research-manager task spawned")
+
     async def process_direct(
         self,
         content: str,