Add "Ask Simba" option to scheduled messages

When use_agent is enabled, the scheduler runs the message content as a
prompt through the LangChain agent and sends Simba's response instead of
the raw content. Frontend adds an Ask Simba toggle with visual indicator.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

blueprints/scheduled_messages/__init__.py

@@ -23,6 +23,7 @@ def _serialize(msg: ScheduledMessage) -> dict:
         "scheduled_at": msg.scheduled_at.isoformat(),
         "status": msg.status.value,
         "recurrence": msg.recurrence.value,
+        "use_agent": msg.use_agent,
         "error_message": msg.error_message,
         "created_at": msg.created_at.isoformat(),
         "updated_at": msg.updated_at.isoformat(),
@@ -89,6 +90,8 @@ async def create_message():
 
     user_id = get_jwt_identity()
 
+    use_agent = bool(data.get("use_agent", False))
+
     msg = await ScheduledMessage.create(
         recipient=recipient,
         channel=channel_enum,
@@ -96,6 +99,7 @@ async def create_message():
         subject=subject,
         scheduled_at=scheduled_at,
         recurrence=recurrence_enum,
+        use_agent=use_agent,
         created_by_id=user_id,
     )
     return jsonify(_serialize(msg)), 201
@@ -131,6 +135,8 @@ async def update_message(msg_id: str):
             msg.recurrence = Recurrence(data["recurrence"])
         except ValueError:
             return jsonify({"error": f"Invalid recurrence: {data['recurrence']}"}), 400
+    if "use_agent" in data:
+        msg.use_agent = bool(data["use_agent"])
     if "scheduled_at" in data:
         try:
             scheduled_at = datetime.fromisoformat(data["scheduled_at"])

blueprints/scheduled_messages/models.py

@@ -36,6 +36,7 @@ class ScheduledMessage(Model):
     recurrence = fields.CharEnumField(
         enum_type=Recurrence, max_length=20, default=Recurrence.NONE
     )
+    use_agent = fields.BooleanField(default=False)
     error_message = fields.TextField(null=True)
     created_by = fields.ForeignKeyField(
         "models.User", related_name="scheduled_messages"

blueprints/scheduled_messages/scheduler.py

@@ -16,6 +16,19 @@ RECURRENCE_DELTAS = {
 }
 
 
+async def _run_agent(prompt: str) -> str:
+    """Run a prompt through the LangChain agent and return the response text."""
+    from blueprints.conversation.agents import main_agent
+    from blueprints.conversation.prompts import SIMBA_SYSTEM_PROMPT
+
+    messages_payload = [
+        {"role": "system", "content": SIMBA_SYSTEM_PROMPT},
+        {"role": "user", "content": prompt},
+    ]
+    response = await main_agent.ainvoke({"messages": messages_payload})
+    return response.get("messages", [])[-1].content
+
+
 async def _schedule_next_occurrence(msg: ScheduledMessage):
     """Create the next pending occurrence for a recurring message."""
     delta = RECURRENCE_DELTAS.get(msg.recurrence)
@@ -35,6 +48,7 @@ async def _schedule_next_occurrence(msg: ScheduledMessage):
         subject=msg.subject,
         scheduled_at=next_at,
         recurrence=msg.recurrence,
+        use_agent=msg.use_agent,
         created_by_id=msg.created_by_id,
     )
     logger.info(
@@ -56,11 +70,16 @@ async def scheduled_messages_loop():
 
             for msg in due:
                 try:
+                    send_content = msg.content
+
+                    if msg.use_agent:
+                        send_content = await _run_agent(msg.content)
+
                     if msg.channel == MessageChannel.IMESSAGE:
                         from blueprints.imessage import send_imessage
                         from utils.strip_markdown import strip_markdown
 
-                        await send_imessage(msg.recipient, strip_markdown(msg.content))
+                        await send_imessage(msg.recipient, strip_markdown(send_content))
 
                     elif msg.channel == MessageChannel.EMAIL:
                         from blueprints.email import send_email_reply
@@ -68,7 +87,7 @@ async def scheduled_messages_loop():
                         await send_email_reply(
                             to=msg.recipient,
                             subject=msg.subject or "(no subject)",
-                            body=msg.content,
+                            body=send_content,
                         )
 
                     msg.status = MessageStatus.SENT