F9: Monetization MVP — Usage-Triggered Paywall & Notifications

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Summary

Hit a resource limit → get shown the plan that fits, in context. Core notification system for payment risk and renewal.

Acceptance Criteria

• Usage-triggered paywalls: hit resource limit → contextual plan display
• Core notification system: payment risk alerts
• Core notification system: renewal notifications
• In-app notifications
• Email notifications
• Behavioral upgrade nudges: production-pattern usage triggers plan-fit prompt

Sprint Assignment

• Sprint 2: Primary release

Success Metrics

• Signup → paid conversion
• Upgrade-prompt acceptance rate
• Non-renewal rate