fix subagent max iteration limit

tests/agent/tools/test_self_tool_runtime_sync.py

@@ -0,0 +1,29 @@
+"""Focused tests for MyTool runtime sync side effects."""
+
+from unittest.mock import MagicMock
+
+import pytest
+
+from nanobot.agent.tools.self import MyTool
+
+
+@pytest.mark.asyncio
+async def test_my_tool_max_iterations_syncs_subagent_limit() -> None:
+    loop = MagicMock()
+    loop.max_iterations = 40
+    loop._runtime_vars = {}
+    loop.subagents = MagicMock()
+    loop.subagents.max_iterations = loop.max_iterations
+
+    def _sync_subagent_runtime_limits() -> None:
+        loop.subagents.max_iterations = loop.max_iterations
+
+    loop._sync_subagent_runtime_limits = _sync_subagent_runtime_limits
+
+    tool = MyTool(loop=loop)
+
+    result = await tool.execute(action="set", key="max_iterations", value=80)
+
+    assert "Set max_iterations = 80" in result
+    assert loop.max_iterations == 80
+    assert loop.subagents.max_iterations == 80