Add production readiness audit and infrastructure scaffolding

[Rajiv-Rago]

Summary

This PR adds comprehensive production readiness documentation and scaffolds two critical infrastructure systems: email notifications and distributed rate limiting. Both systems ship with zero-dependency defaults (console logger / in-memory store) and can be upgraded to production backends via environment variables.

Key Changes

Documentation

• AUDIT.md — Comprehensive production readiness audit covering legal/compliance, security, infrastructure, monitoring, and operational gaps. Identifies Tier 1 blockers (email service, payment integration, legal pages) and provides detailed status across 10 categories.
• INFRASTRUCTURE_SETUP.md — Step-by-step setup guide for email providers (SendGrid, AWS SES, Resend) and distributed rate limiting (Redis). Includes environment variable reference and custom provider extension patterns.
• PAGINATION_PLAN.md — Detailed plan for adding consistent pagination across 4 list-returning endpoints that currently lack it, with migration strategy for frontend consumers.

Email Service (lib/email/)

• types.ts — EmailProvider interface, EmailMessage, and SendResult types
• index.ts — sendEmail() entry point with provider resolution and singleton caching
• templates.ts — Transactional email templates (password reset, welcome email)
• providers/console.ts — Default console provider (logs emails, no dependency)
• providers/sendgrid.ts — SendGrid provider scaffold (requires @sendgrid/mail)
• providers/ses.ts — AWS SES provider scaffold (requires @aws-sdk/client-ses)
• providers/resend.ts — Resend provider scaffold (requires resend)

Rate Limiting (lib/rateLimit/)

• types.ts — RateLimitStore interface, RateLimitConfig, and RateLimitCheckResult types
• index.ts — checkRateLimit() entry point with store resolution, singleton caching, and centralized rule configuration
• stores/memory.ts — Default in-memory store with periodic cleanup (no dependency)
• stores/redis.ts — Redis store scaffold (requires ioredis)

Integration

• middleware.ts — Refactored to use new checkRateLimit() from lib/rateLimit; removed 60 lines of inline rate limiting logic
• app/api/auth/forgot-password/route.ts — Integrated sendEmail() to send password reset emails (previously logged to console)
• lib/env.ts — Added email provider configuration variables (EMAIL_PROVIDER, EMAIL_FROM_ADDRESS, SENDGRID_API_KEY, RESEND_API_KEY, AWS_REGION, APP_URL, APP_NAME)
• package.json — Pinned TypeScript to 5.9.3 for consistency

Implementation Details

• Zero-dependency defaults — Both systems work out-of-the-box with console/memory providers; real providers are only loaded when explicitly configured
• Dynamic requires — Email and rate limit providers use dynamic require() so dependencies are only needed when that provider is active
• Singleton pattern — Both systems cache provider/store instances to avoid repeated initialization
• Extensible design — Clear interfaces allow adding custom providers/stores without modifying core code
• Environment-driven — All configuration via environment variables; no code changes needed to swap providers
• Backward compatible — Middleware refactor maintains identical behavior; password reset flow now sends emails instead of logging

Notes

The audit identifies several production blockers (email service, payment integration, legal pages, analytics) that are now partially addressed by this infrastructure scaffolding. Email service is now functional; payment and legal pages remain out of scope for this PR.

https://claude.ai/code/session_01H4vpUYToUaNfQk38D8cmdR

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Project	Deployment	Actions	Updated (UTC)
lms	Ready	Preview, Comment	Feb 24, 2026 7:00am