feat: Add /export command for session export (Markdown/JSON) to CLI and Gateway

hermes_state_portability.py

@@ -291,6 +291,42 @@ class SessionPortabilityMixin:
         base["messages"] = [msg for seg in segments for msg in (seg.get("messages") or [])]
         return base
 
+    @staticmethod
+    def format_session_as_markdown(export_data: Dict[str, Any]) -> str:
+        """Format exported session data as a readable Markdown document."""
+        lines = []
+        session_id = export_data.get("id", "Unknown")
+        lines.append(f"# Session Export: {session_id}\n")
+        
+        title = export_data.get("title")
+        if title:
+            lines.append(f"**Title**: {title}")
+
+        created_at = export_data.get("created_at")
+        if created_at:
+            lines.append(f"**Started**: {created_at}")
+
+        if title or created_at:
+            lines.append("\n---\n")
+
+        for msg in export_data.get("messages", []):
+            role = msg.get("role", "unknown").capitalize()
+            content = msg.get("content", "")
+
+            if role == "User":
+                lines.append(f"## {role}\n\n{content}\n")
+            elif role == "Assistant":
+                reasoning = msg.get("reasoning", "")
+                if reasoning:
+                    lines.append(f"## {role} (Reasoning)\n\n{reasoning}\n")
+                lines.append(f"## {role}\n\n{content}\n")
+            elif role == "Tool":
+                lines.append(f"### Tool Result\n\n```\n{content}\n```\n")
+            else:
+                lines.append(f"## {role}\n\n{content}\n")
+
+        return "\n".join(lines)
+
     def export_all(self, source: str = None) -> List[Dict[str, Any]]:
         """
         Export all sessions (with messages) as a list of dicts.