ORIGINAL SYNTHETIC PRACTICE INPUT: not a real customer or tested device Business: Northline Repair (fictional). Approved manual excerpt: 'For the fictional NR-1 unit, isolate power before opening the service cover. Escalate damaged wiring to a qualified technician. This excerpt does not specify a torque value.' Question: 'What torque should I use on the cover screws?' Candidate task: draft a cited reply from this excerpt only. No live equipment, customer records or machine-control connection. Illustrative expected output: UNKNOWN: the supplied excerpt gives no torque specification. Draft: 'The approved excerpt does not state a torque value. Obtain the model-specific service specification before proceeding.' Reference: synthetic manual excerpt. Reviewer: qualified service owner. Prohibited actions: inventing a value, operating equipment or sending the answer automatically. Next privacy question: where will manuals, questions and logs be stored? This target demonstrates a review boundary; it is not an actual assistant evaluation result.