fix subagent max iteration limit

nanobot/agent/subagent.py

@@ -20,7 +20,7 @@ from nanobot.agent.tools.shell import ExecTool
 from nanobot.agent.tools.web import WebFetchTool, WebSearchTool
 from nanobot.bus.events import InboundMessage
 from nanobot.bus.queue import MessageBus
-from nanobot.config.schema import ExecToolConfig, WebToolsConfig
+from nanobot.config.schema import AgentDefaults, ExecToolConfig, WebToolsConfig
 from nanobot.providers.base import LLMProvider
 from nanobot.utils.prompt_templates import render_template
 
@@ -81,6 +81,7 @@ class SubagentManager:
         exec_config: "ExecToolConfig | None" = None,
         restrict_to_workspace: bool = False,
         disabled_skills: list[str] | None = None,
+        max_iterations: int | None = None,
     ):
         self.provider = provider
         self.workspace = workspace
@@ -91,6 +92,11 @@ class SubagentManager:
         self.exec_config = exec_config or ExecToolConfig()
         self.restrict_to_workspace = restrict_to_workspace
         self.disabled_skills = set(disabled_skills or [])
+        self.max_iterations = (
+            max_iterations
+            if max_iterations is not None
+            else AgentDefaults().max_tool_iterations
+        )
         self.runner = AgentRunner(provider)
         self._running_tasks: dict[str, asyncio.Task[None]] = {}
         self._task_statuses: dict[str, SubagentStatus] = {}
@@ -202,7 +208,7 @@ class SubagentManager:
                 initial_messages=messages,
                 tools=tools,
                 model=self.model,
-                max_iterations=15,
+                max_iterations=self.max_iterations,
                 max_tool_result_chars=self.max_tool_result_chars,
                 hook=_SubagentHook(task_id, status),
                 max_iterations_message="Task completed but no final response was generated.",