diff --git a/src/conductor/ai/agents/testing/__init__.py b/src/conductor/ai/agents/testing/__init__.py
index cd4dffaa..30c357c6 100644
--- a/src/conductor/ai/agents/testing/__init__.py
+++ b/src/conductor/ai/agents/testing/__init__.py
@@ -52,6 +52,9 @@
 # Record/replay
 from conductor.ai.agents.testing.recording import record, replay
 
+# Semantic assertions
+from conductor.ai.agents.testing.semantic import assert_output_satisfies
+
 # Strategy validators
 from conductor.ai.agents.testing.strategy_validators import (
     StrategyViolation,
@@ -77,6 +80,8 @@
     "assert_guardrail_passed",
     "assert_guardrail_failed",
     "assert_max_turns",
+    # Semantic assertions
+    "assert_output_satisfies",
     # Fluent API
     "expect",
     "AgentResultExpectation",
diff --git a/tests/unit/ai/test_testing_semantic.py b/tests/unit/ai/test_testing_semantic.py
new file mode 100644
index 00000000..af727a3b
--- /dev/null
+++ b/tests/unit/ai/test_testing_semantic.py
@@ -0,0 +1,72 @@
+"""Tests for conductor.ai.agents.testing.semantic.
+
+Imported through the package rather than the submodule, deliberately: that is
+the path ``semantic.py``'s docstring tells users to take, so exercising it here
+keeps the re-export honest.  ``litellm`` is an optional dependency and is
+stubbed throughout, following ``test_guardrail.py``.
+"""
+
+import sys
+from unittest.mock import MagicMock, patch
+
+import pytest
+
+from conductor.ai.agents.result import AgentResult
+from conductor.ai.agents.testing import assert_output_satisfies
+
+
+def _judge_returning(payload: str) -> MagicMock:
+    response = MagicMock()
+    response.choices = [MagicMock()]
+    response.choices[0].message.content = payload
+    return response
+
+
+def _result(output: str = "Sunny in NYC, 22C") -> AgentResult:
+    return AgentResult(output=output)
+
+
+def test_passes_when_score_meets_threshold():
+    with patch.dict("sys.modules", {"litellm": MagicMock()}):
+        sys.modules["litellm"].completion.return_value = _judge_returning(
+            '{"score": 0.9, "reason": "covers NYC weather"}'
+        )
+
+        assert_output_satisfies(_result(), criterion="mentions NYC weather", threshold=0.7)
+
+
+def test_fails_below_threshold_and_reports_the_judge_reason():
+    with patch.dict("sys.modules", {"litellm": MagicMock()}):
+        sys.modules["litellm"].completion.return_value = _judge_returning(
+            '{"score": 0.2, "reason": "no weather at all"}'
+        )
+
+        with pytest.raises(AssertionError, match="no weather at all"):
+            assert_output_satisfies(_result(), criterion="mentions NYC weather", threshold=0.7)
+
+
+def test_criterion_and_output_reach_the_judge():
+    with patch.dict("sys.modules", {"litellm": MagicMock()}):
+        sys.modules["litellm"].completion.return_value = _judge_returning(
+            '{"score": 1.0, "reason": "ok"}'
+        )
+
+        assert_output_satisfies(_result("Sunny in NYC"), criterion="mentions NYC")
+
+        prompt = sys.modules["litellm"].completion.call_args.kwargs["messages"][1]
+        assert "mentions NYC" in prompt["content"]
+        assert "Sunny in NYC" in prompt["content"]
+
+
+def test_unparseable_judge_reply_fails_rather_than_passing():
+    with patch.dict("sys.modules", {"litellm": MagicMock()}):
+        sys.modules["litellm"].completion.return_value = _judge_returning("not json")
+
+        with pytest.raises(AssertionError, match="unparseable"):
+            assert_output_satisfies(_result(), criterion="anything")
+
+
+def test_missing_litellm_raises_with_an_install_hint():
+    with patch.dict("sys.modules", {"litellm": None}):
+        with pytest.raises(ImportError, match="litellm"):
+            assert_output_satisfies(_result(), criterion="anything")