Engineering notes — things I keep re-explaining, written down once.
- Compare GPT, Claude, Gemini, and OpenAI-Compatible LLM APIs for Support Chatbots
- Retry-Safe Fallback Models Behind One API Key for a SaaS Chatbot
- Ask Your Docs in Node.js: Structured JSON Answers with Citations and Semantic Search
- Debug Password Reset Email Template Variables and Placeholder API Errors
- Building a Node.js Uptime Dashboard from Metrics and Logs
- Object storage for SaaS user documents: private buckets and presigned download links
- Export download links: private object storage and short-lived presigned URLs