Observability troubleshooting

Symptom	Likely cause
Ledger empty	Wrong workspace root; obs disabled; hooks not merged
No Langfuse trace	Keys missing; flush not run; 429 rate limit
Three sessions for one pipeline	Separate conversation_id per Task (expected today)
Usage all zero	Looking at a Task trace; or flush before afterAgentResponse
Model auto-smart	Placeholder until end-of-turn hooks
Scores all unattributed	No subagentStart + step_context from the loader

pipeline-kit doctor
pipeline-kit obs status
wc -l .pipeline/state/obs/events.jsonl
tail -f .pipeline/state/obs/events.jsonl

Open the project folder that contains .cursor/hooks.json as the only workspace root.