SOP Opera

What it does

• Fuses gas readings, work permits, isolation state and worker location into hazard pathways — the danger that only exists when four boring facts line up.
• Cut the false negative rate from 44.5% to 0% across 593 statutorily labelled cases, and alarms 28 minutes before a conventional single sensor threshold fires.
• LangGraph multi agent assessment pipeline with conditional agent fan-out and hybrid pgvector/SQL retrieval over a clause level regulatory corpus.
• The risk verdict stays fully deterministic, and every generated citation is validated against the evidence it was retrieved from — no confidently invented regulations.
• Durable Postgres job queue plus a non-blocking WebSocket layer with per client backpressure, so a slow browser never stalls the pipeline.
• Hash chained, tamper evident audit trail: edit or reorder a recorded safety decision and the verification endpoint names the exact sequence where it happened.