Scope entity resolution reasoning effort independently

tests/test_llm_context_efficiency.py

@@ -50,3 +50,37 @@ def test_identity_projection_keeps_readable_evidence_and_legacy_requests(stage):
         assert value == context["sources"][key]
     assert len(new["messages"][1]["content"]) < len(old["messages"][1]["content"]) / 2
     assert data["output_schema"] == new["output_schema"]
+
+
+@pytest.mark.parametrize("version,expected", [
+    ("entity_resolution_plan_v1", "low"),
+    ("entity_resolution_assessment_v3", "low"),
+    ("case_interpretation_resolved_v3", "medium"),
+    ("hypothesis_generation_v1", "medium"),
+    ("investigation_v1", "medium"),
+    ("entity_resolution_assessment_v3_suffix", "medium"),
+])
+def test_identity_override_is_scoped_at_http_transport(http_endpoint, version, expected):
+    url, seen, _ = http_endpoint
+    provider = ProviderConfig(id="test", model="fixture", base_url=url,
+        reasoning_effort="medium", entity_resolution_reasoning_effort="low", max_output_tokens=16384)
+    config = GatewayConfig((provider,))
+    query = request()
+    query['prompt_version'] = version
+    asyncio.run(LLMGateway(config).complete_round(query))
+    assert seen[0]['body']['reasoning_effort'] == expected
+    assert seen[0]['body'][provider.token_parameter] == 16384
+    assert provider.reasoning_effort == "medium"
+    assert config.snapshot()['providers'][0]['entity_resolution_reasoning_effort'] == "low"
+
+
+@pytest.mark.parametrize("effort", [True, 8192, [], "unlimited"])
+def test_invalid_identity_reasoning_override(effort):
+    with pytest.raises(LLMError, match="LLM_CONFIG"):
+        ProviderConfig(id="test", model="fixture", base_url="http://localhost",
+            entity_resolution_reasoning_effort=effort)
+
+
+def test_omitted_identity_override_preserves_previous_snapshot():
+    provider = ProviderConfig(id="test", model="fixture", base_url="http://localhost", reasoning_effort="medium")
+    assert 'entity_resolution_reasoning_effort' not in GatewayConfig((provider,)).snapshot()['providers'][0]