fix(exec): uncap config exec timeout; 0 means no limit (#3595)

tests/tools/test_tool_validation.py

@@ -4,6 +4,7 @@ import sys
 from typing import Any
 
 import pytest
+from pydantic import ValidationError
 
 from nanobot.agent.tools import (
     ArraySchema,
@@ -16,7 +17,7 @@ from nanobot.agent.tools import (
 )
 from nanobot.agent.tools.base import Tool
 from nanobot.agent.tools.registry import ToolRegistry
-from nanobot.agent.tools.shell import ExecTool
+from nanobot.agent.tools.shell import ExecTool, ExecToolConfig
 from nanobot.security.network import configure_ssrf_whitelist
 
 
@@ -663,6 +664,26 @@ async def test_exec_timeout_capped_at_max() -> None:
     assert "Exit code: 0" in result
 
 
+def test_exec_config_timeout_uncapped_and_zero() -> None:
+    """Config timeout is no longer capped at 600 and accepts 0 = no limit (#3595)."""
+    assert ExecToolConfig(timeout=0).timeout == 0
+    assert ExecToolConfig(timeout=3600).timeout == 3600
+    with pytest.raises(ValidationError):
+        ExecToolConfig(timeout=-1)
+
+
+def test_resolve_timeout_config_uncapped_and_unlimited() -> None:
+    """Config timeout drives the hard timeout uncapped; 0 means no limit (#3595)."""
+    assert ExecTool(timeout=3600)._resolve_timeout(None) == 3600
+    assert ExecTool(timeout=0)._resolve_timeout(None) is None
+
+
+def test_resolve_timeout_per_call_still_capped() -> None:
+    """Per-call (LLM) timeout stays capped at _MAX_TIMEOUT even with unlimited config."""
+    assert ExecTool(timeout=0)._resolve_timeout(9999) == ExecTool._MAX_TIMEOUT
+    assert ExecTool(timeout=60)._resolve_timeout(120) == 120
+
+
 # --- _resolve_type and nullable param tests ---