Prompt Engineering
& LLM Guides
Practical guides on writing better prompts, cutting token costs and building with LLM APIs, for ChatGPT, Claude and Gemini users.
Fix Node.js MaxListenersExceededWarning
Node's MaxListenersExceededWarning means a listener is piling up somewhere. Here's how to find and fix the real leak instead of raising the limit.
AI Prompt to Turn a Bug Report Into a Test
An AI prompt that turns a vague bug report into a reproducible failing test, so you fix the real cause instead of guessing and hoping it sticks.
AI Prompt to Fix a Flaky CI Test
A practical AI prompt for diagnosing a flaky CI test fast, so you find the real race condition causing it instead of adding another retry or timeout.
console.log vs debugger in Node.js
console.log vs debugger in Node.js: when print debugging is fine, when breakpoints actually save you time, and the workflow I use on client projects.
Debug a Node.js Memory Leak with AI
A practical AI prompt that uses a real heap snapshot retainer path to actually find a Node.js memory leak instead of just confirming one exists.
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.
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.
React 'Maximum Update Depth Exceeded' Fix
Fix React's Maximum update depth exceeded error for good: the two real causes, render-time setState and unstable useEffect deps, with working code fixes.
Fix PHP 'Allowed Memory Size Exhausted'
PHP Allowed memory size exhausted fatal error, explained: what triggers it, the quick php.ini fix, and the chunk()/cursor() code fix that stops it recurring.
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