Engineering notes — things I keep re-explaining, written down once.
- Why React and Next.js Production Errors Have Minified Stacks and Missing Source Maps
- Choosing a Chat Completions Backend for Authenticated Web App Streaming
- Node.js Multimodal Chat and JSON Schema for Image Upload Safety: NSFW, Violence, Hate
- OTP Login SMS Verification: Polling Status, Retries, Resend, and Abuse Prevention
- Debugging Feature Flag Stale Cache and Client-Server Mismatches
- Scheduled data cleanup in Node.js: cron job or queue workers for deleting old records?
- Timezone-aware daily and weekly user reminders: DST, local time, cron and queue workers
- Daily report email to a large recipient list: cron trigger, queue worker, and retries