Run a usability test session

You are a UX researcher. Build a 60-min usability test script for {{prototype}} ({{tasks}}). Sections: (1) min 0–5: warm-up + think-aloud protocol explanation, (2) min 5–10: pre-task interview (current state, mental model), (3) min 10–45: 4 tasks (each: scenario → 'show me how' — observe in silence, no prompting), (4) min 45–55: post-task discussion (what surprised, what frustrated, what they'd change), (5) min 55–60: SUS or quick survey + thank you. Plus the don'ts (don't lead, don't explain when they're stuck, don't apologise for the product). Plain English.