feat(cron): bind scheduled automations to sessions

nanobot/agent/tools/cron.py

@@ -9,7 +9,6 @@ from typing import Any
 from nanobot.agent.tools.base import Tool, tool_parameters
 from nanobot.agent.tools.context import ContextAware, RequestContext
 from nanobot.agent.tools.schema import (
-    BooleanSchema,
     IntegerSchema,
     StringSchema,
     tool_parameters_schema,
@@ -38,10 +37,6 @@ _CRON_PARAMETERS = tool_parameters_schema(
         "ISO datetime for one-time execution (e.g. '2026-02-12T10:30:00'). "
         "Naive values use the tool's default timezone."
     ),
-    deliver=BooleanSchema(
-        description="Whether to deliver the execution result to the user channel (default true)",
-        default=True,
-    ),
     job_id=StringSchema("REQUIRED when action='remove'. Job ID to remove (obtain via action='list')."),
     required=["action"],
     description=(
@@ -76,11 +71,11 @@ class CronTool(Tool, ContextAware):
         return cls(cron_service=ctx.cron_service, default_timezone=ctx.timezone)
 
     def set_context(self, ctx: RequestContext) -> None:
-        """Set the current session context for delivery."""
+        """Set the current session context for scheduled automation ownership."""
         self._channel.set(ctx.channel)
         self._chat_id.set(ctx.chat_id)
         self._metadata.set(ctx.metadata)
-        self._session_key.set(ctx.session_key or f"{ctx.channel}:{ctx.chat_id}")
+        self._session_key.set(ctx.session_key or "")
 
     def set_cron_context(self, active: bool):
         """Mark whether the tool is executing inside a cron job callback."""
@@ -170,10 +165,9 @@ class CronTool(Tool, ContextAware):
                 "describing what to do when the job triggers "
                 "(e.g. the reminder text). Retry including message=\"...\"."
             )
-        channel = self._channel.get()
-        chat_id = self._chat_id.get()
-        if not channel or not chat_id:
-            return "Error: no session context (channel/chat_id)"
+        session_key = self._session_key.get()
+        if not session_key:
+            return "Error: scheduled automations must be created from a chat session"
         if tz and not cron_expr:
             return "Error: tz can only be used with cron_expr"
         if tz:
@@ -210,12 +204,8 @@ class CronTool(Tool, ContextAware):
             name=name or message[:30],
             schedule=schedule,
             message=message,
-            deliver=deliver,
-            channel=channel,
-            to=chat_id,
             delete_after_run=delete_after,
-            channel_meta=self._metadata.get(),
-            session_key=self._session_key.get() or None,
+            session_key=session_key,
         )
         return f"Created job '{job.name}' (id: {job.id})"