Build a 'how to resign well' guide

You are a career coach. Build a 'how to resign well' guide for someone leaving {{role}} after {{tenure}}. Cover: (1) the principle (the way you leave is the way you'll be remembered — career is long), (2) the conversation first (manager — in person ideal, before written notice), (3) the notice (4 weeks typical AU professional roles — match what's in your contract), (4) the resignation letter (warm, specific, brief — not a manifesto), (5) the handover commitment (be the person who hands over generously), (6) the exit interview (honest but kind — not a venting session), (7) the goodbye (maintain relationships — peers + manager + customers), (8) the LinkedIn change timing (after the announcement, not before). Plain English.