diff --git a/python/packages/claude/agent_framework_claude/_agent.py b/python/packages/claude/agent_framework_claude/_agent.py
index e0224e76be0..fe2983eefdc 100644
--- a/python/packages/claude/agent_framework_claude/_agent.py
+++ b/python/packages/claude/agent_framework_claude/_agent.py
@@ -589,9 +589,11 @@ def _prepare_client_options(self, resume_session_id: str | None = None) -> SDKOp
             opts["cwd"] = cwd
         if permission_mode := self._settings.get("permission_mode"):
             opts["permission_mode"] = permission_mode
-        if max_turns := self._settings.get("max_turns"):
+        max_turns = self._settings.get("max_turns")
+        if max_turns is not None:
             opts["max_turns"] = max_turns
-        if max_budget_usd := self._settings.get("max_budget_usd"):
+        max_budget_usd = self._settings.get("max_budget_usd")
+        if max_budget_usd is not None:
             opts["max_budget_usd"] = max_budget_usd
 
         # Apply default options
diff --git a/python/packages/claude/tests/test_claude_agent.py b/python/packages/claude/tests/test_claude_agent.py
index cd62108ec51..d8af59a0b92 100644
--- a/python/packages/claude/tests/test_claude_agent.py
+++ b/python/packages/claude/tests/test_claude_agent.py
@@ -1157,6 +1157,25 @@ def test_prepare_client_options_with_settings(self, monkeypatch: pytest.MonkeyPa
             assert call_kwargs.get("model") == "opus"
             assert call_kwargs.get("max_turns") == 15
 
+    def test_prepare_client_options_preserves_explicit_zero_limits(self) -> None:
+        """Test that explicit zero limit values are preserved."""
+        agent = ClaudeAgent(
+            default_options={
+                "max_turns": 0,
+                "max_budget_usd": 0.0,
+            }
+        )
+
+        with patch("agent_framework_claude._agent.SDKOptions") as mock_opts:
+            mock_opts.return_value = MagicMock()
+            agent._prepare_client_options()  # type: ignore[reportPrivateUsage]
+            call_kwargs = mock_opts.call_args[1]
+
+            assert "max_turns" in call_kwargs
+            assert call_kwargs["max_turns"] == 0
+            assert "max_budget_usd" in call_kwargs
+            assert call_kwargs["max_budget_usd"] == 0.0
+
     def test_prepare_client_options_with_instructions(self) -> None:
         """Test building options with instructions parameter."""
         agent = ClaudeAgent(instructions="Be helpful")