bugfixes: transaction parameter collector, generic formatting messages, guardrails, prompts. Testing contas

tests/test_mcp_parameter_extraction_runtime.py

@@ -59,3 +59,54 @@ async def test_runtime_extracts_order_id_from_current_message():
     )
     assert result["order_id"] == "123"
     assert result["contract_key"] == "3000131180"
+
+class _ContestExtractLLM:
+    async def ainvoke(self, messages, **kwargs):
+        prompt = messages[0]["content"]
+        if "Campo: subject" in prompt:
+            return {"content": '{"subject": "TIM CTRL Redes Sociais 8.0"}'}
+        if "Campo: valor" in prompt:
+            return {"content": '{"valor": null}'}
+        return {"content": '{}'}
+
+
+class _ContestExtractRouter:
+    def parameter_extract_rules(self, tool_name):
+        return {
+            "subject": {
+                "from": "message",
+                "strategy": "llm",
+                "type": "string",
+                "description": "Extraia o item contestado.",
+            },
+            "valor": {
+                "from": "message",
+                "strategy": "llm",
+                "type": "number",
+                "description": "Extraia o valor explicitamente informado.",
+            },
+        }
+
+
+class _ContestExtractRuntime(AgentRuntimeMixin):
+    def __init__(self):
+        self.tool_router = _ContestExtractRouter()
+        self.llm = _ContestExtractLLM()
+
+
+@pytest.mark.asyncio
+async def test_new_transaction_current_message_overrides_stale_subject_from_context():
+    runtime = _ContestExtractRuntime()
+    result = await runtime._extract_mcp_parameters(
+        "contestar_cobranca",
+        {"subject": "TIM Fashion Mensal", "valor": 10.0},
+        {
+            "user_text": "nao contratei TIM CTRL Redes Sociais 8.0",
+            "sanitized_input": "nao contratei TIM CTRL Redes Sociais 8.0",
+        },
+        overwrite_from_message=True,
+    )
+    assert result["subject"] == "TIM CTRL Redes Sociais 8.0"
+    # null extraction does not destroy a pre-existing value; transaction start
+    # sanitization is about explicit current-message evidence, not blind clearing.
+    assert result["valor"] == 10.0