48f9f9ce79
Added detailed guidance for 20+ email types organized by category: Onboarding: - New users series, new customers series - Key onboarding step reminders, new user invites Retention: - Upgrade to paid/higher plan, ask for review - Proactive support, usage reports, NPS, referral program Billing: - Switch to annual, failed payment recovery - Cancellation survey, renewal reminders Usage: - Daily/weekly/monthly summaries - Key event and milestone notifications Win-Back: - Expired trials, cancelled customers Campaigns: - Monthly roundup, seasonal promotions - Product updates, industry news, pricing updates Also added email audit checklist for program review. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>