Prompt Engineering
& LLM Guides
Practical guides on writing better prompts, cutting token costs and building with LLM APIs, for ChatGPT, Claude and Gemini users.
pgvector vs Pinecone for Node.js Embeddings
pgvector vs Pinecone for Node.js apps: when Postgres vector search beats a dedicated vector database, with real code and a clear recommendation.
Caching OpenAI API Responses in Node.js
Caching OpenAI API responses in Node.js with Redis: exact-match vs semantic caching, the real tradeoffs, and code that actually cuts your costs.
Debug a Stack Trace Faster With AI
How to debug a Node.js stack trace with AI the right way: the exact prompt structure that gives real fixes instead of generic null-check guesses.
Cursor-Based Pagination for REST APIs
Offset pagination slows down and returns duplicate rows at scale. Here's why that happens and how to implement cursor-based pagination in a REST API.
Node.js 'Headers Already Sent' Error Fix
Node.js's 'Cannot set headers after they are sent' error explained: why it happens, the real fix, and how to stop it recurring in production.
Stream OpenAI API Responses in Node.js with SSE
Learn how to stream OpenAI API responses in Node.js using Server-Sent Events, with real Express code and the mistakes that break streaming in production.
How to Upload Files in React and Node.js
A step-by-step guide to handling file uploads in a full-stack app: multipart form data in React, Multer on the Node.js API, and the mistakes that break it.
Fix OpenAI API Rate Limit Errors in Node.js
Get 429 rate_limit_exceeded errors from the OpenAI API in Node.js? Here is the real fix: exponential backoff, retry-after handling, and concurrency limits.
Fix Invalid JSON from LLM API Responses
Why LLM APIs return invalid JSON and how to fix it for good: structured output modes, schema validation, and a safe parse-and-repair fallback in Node.js.
Stay ahead of the curve
Get the latest prompt engineering strategies, token optimization tricks, and platform updates delivered straight to your inbox once a month. No spam.