feat: IL-306 Traces now log exceptions

CHANGELOG.md

@@ -12,6 +12,7 @@
 - feature: Added `Runner.failed_runs(..)` and `Evaluator.failed_evaluations(..)` to retrieve all failed run / evaluation lineages
 - feature: Added `.successful_example_outputs(..)` and `.failed_example_outputs(..)` to `RunRepository` to match the evaluation repository
 - feature: Added optional argument to set an id when creating a `Dataset` via `DatasetRepository.create_dataset(..)`
+- feature: Traces now log exceptions using the `ErrorValue` type.
 
 ### Fixes
 

src/intelligence_layer/core/tracer/tracer.py

@@ -1,3 +1,4 @@
+import traceback
 from abc import ABC, abstractmethod
 from contextlib import AbstractContextManager
 from datetime import datetime, timezone
@@ -126,6 +127,12 @@ def ensure_id(self, id: Optional[str]) -> str:
         return id if id is not None else str(uuid4())
 
 
+class ErrorValue(BaseModel):
+    error_type: str
+    message: str
+    stack_trace: str
+
+
 class Span(Tracer, AbstractContextManager["Span"]):
     """Captures a logical step within the overall workflow
 
@@ -187,8 +194,15 @@ def __exit__(
         self,
         exc_type: Optional[type[BaseException]],
         exc_value: Optional[BaseException],
-        traceback: Optional[TracebackType],
+        _traceback: Optional[TracebackType],
     ) -> None:
+        if exc_type is not None and exc_value is not None and _traceback is not None:
+            error_value = ErrorValue(
+                error_type=str(exc_type.__qualname__),
+                message=str(exc_value),
+                stack_trace=str(traceback.format_exc()),
+            )
+            self.log(error_value.message, error_value)
         self.end()
 
 

src/intelligence_layer/evaluation/run/domain.py

@@ -20,7 +20,7 @@ class FailedExampleRun(BaseModel):
     @staticmethod
     def from_exception(exception: Exception) -> "FailedExampleRun":
         return FailedExampleRun(
-            error_message=f"{type(exception)}: {str(exception)}\n{traceback.format_exc()}"
+            error_message=f"{type(exception).__qualname__}: {str(exception)}\n{traceback.format_exc()}"
         )
 
 

tests/core/test_tracer.py

@@ -32,6 +32,7 @@
     utc_now,
 )
 from intelligence_layer.core.tracer.persistent_tracer import TracerLogEntryFailed
+from intelligence_layer.core.tracer.tracer import ErrorValue
 
 
 @fixture
@@ -113,6 +114,22 @@ def test_can_add_parent_and_child_entries() -> None:
     assert isinstance(parent.entries[0].entries[0], LogEntry)
 
 
+def test_task_logs_error_value() -> None:
+    tracer = InMemoryTracer()
+
+    with pytest.raises(ValueError):
+        with tracer.task_span("failing task", None):
+            raise ValueError("my bad, sorry")
+
+    assert isinstance(tracer.entries[0], InMemoryTaskSpan)
+    assert isinstance(tracer.entries[0].entries[0], LogEntry)
+    error = tracer.entries[0].entries[0].value
+    assert isinstance(error, ErrorValue)
+    assert error.message == "my bad, sorry"
+    assert error.error_type == "ValueError"
+    assert error.stack_trace.startswith("Traceback")
+
+
 def test_task_automatically_logs_input_and_output(
     complete: Task[CompleteInput, CompleteOutput],
 ) -> None: