Fix: include traces generated from @traceable decorator#32
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Seán (seanderoiste) wants to merge 2 commits into
Open
Fix: include traces generated from @traceable decorator#32Seán (seanderoiste) wants to merge 2 commits into
Seán (seanderoiste) wants to merge 2 commits into
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Problem: fetch_trace() returned [] for traces created with wrap_openai(), even though messages were visible in LangSmith UI. Root cause: wrap_openai stores messages in child LLM runs, not at the root level like LangChain/LangGraph traces. Solution: Added fallback to extract messages from child runs when root-level messages are not found. Finds the last LLM child run and combines inputs.messages with outputs.choices[0].message. Maintains backward compatibility with existing LangChain traces. Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Seán (seanderoiste)
changed the title
- Updated _extract_messages_from_child_runs() to fetch all child runs (not just LLM runs) - Extract key fields: name, run_type, inputs, outputs, error, status, start_time - Return child runs in chronological order - Include parent-level errors at the end This makes traces created with @Traceable decorator fully visible by extracting data from child runs.
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Include all child runs in trace output
What Changed
Added functionality to extract and display all child runs for traces that don't have a
messagesfield at the root level.Updated
_extract_messages_from_child_runs()to:Why
Traces created with the
@traceabledecorator don't populate amessagesfield at the root level. Instead, all information is stored in child runs. This change makes that information accessible.Example Output
[ { "name": "ChatOpenAI", "run_type": "llm", "inputs": {...}, "outputs": {...}, "error": null, "status": "success", "start_time": "2026-01-09T18:47:01.675132" }, { "name": "broken_tool", "run_type": "chain", "inputs": {"query": "Help user with something"}, "outputs": {"output": null}, "error": "RuntimeError('This tool is intentionally broken!')\n\nTraceback...", "status": "error", "start_time": "2026-01-09T18:47:03.688096" } ]