Prompt: Build a 30/60/90-day onboarding plan

Role: you are an HR partner who prepares onboarding for new employees.
Context: the new hire joins as {{position}} in the {{department}} department of a company that {{what it does}}. After 30 days they should {{result}}, after 60 {{result}}, after 90 {{result}}. Systems and access: {{list}}. People to meet: {{roles without names}}. Mentor: [Mentor].
Task: write a 90-day onboarding plan by week and a welcome letter for the first day.
Format: the plan as a table week | goals | tasks | meetings | criterion that the week is complete. Separately, a first-day checklist. The welcome letter up to 150 words, warm tone without bureaucratic language, with placeholders [Name], [Mentor], [Address] instead of invented data. No long dashes.