Unexpected turn structure in W&B Weave trace #7222

Example: https://forge.coreweave.com/wandb/moz-bugbug/hackbot-dev/weave/agents/conversations/4f4b49fd-ba7f-4860-b538-be0b851755a2

Unexpected turn structure

• This trace is rooted at the tool or LLM span "chat claude-opus-5-5" instead of an agent (invoke_agent) span. Its parent agent span was never received, so the turn is missing its start and its initiating input. Check that the agent span was exported with the same trace ID.

Weave displays each trace as one turn. Keep the LLM (chat) and tool (execute_tool) spans for a complete exchange under the same agent (invoke_agent) span, in the same trace. Check for missing message content, split traces, or a run that ended early.
Learn how to structure agent spans