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Prompt Engineering & LLM Guides

Practical guides on writing better prompts, cutting token costs and building with LLM APIs, for ChatGPT, Claude and Gemini users.

AllAI Prompt EngineeringAI and Backend IntegrationAI for DevelopersDatabase OptimizationDebugging and TroubleshootingDevOps and DeploymentDeveloper ProductivityFull-Stack DevelopmentGit and Version ControlLaravel and PHP DevelopmentNode.js and Backend DevelopmentPerformance OptimizationREST APIsReact and Frontend DevelopmentServer ConfigurationShopify DevelopmentTrending AI Prompts and ToolsWeb SecurityWordPress and WooCommerce#legacy-code
AI Prompt for Unit Tests on Legacy CodeTrending AI Prompts and Tools
Oct 8, 20265 min read

AI Prompt for Unit Tests on Legacy Code

The exact AI prompt for unit tests I use on untested legacy PHP functions, built around real guarantees instead of a vague write-tests request.

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AI Refactoring: Breaking Up a God ClassAI for Developers
Sep 30, 20265 min read

AI Refactoring: Breaking Up a God Class

A real AI refactoring workflow for breaking up a legacy god class safely: the prompts that work, and the ones that quietly break production.

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AI Prompt to Write Unit Tests for Legacy PHPLaravel and PHP Development
Sep 26, 20266 min read

AI Prompt to Write Unit Tests for Legacy PHP

Learn how to write an AI prompt that generates real unit tests for legacy PHP code, including the hidden edge cases a generic prompt misses.

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5 AI Prompts to Refactor Messy CodeTrending AI Prompts and Tools
Sep 19, 20265 min read

5 AI Prompts to Refactor Messy Code

5 AI prompts that turn vague refactor requests into mergeable code — name the exact smell, protect behavior, and lock in tests before you touch anything.

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