Nobody likes writing tests. But everybody likes having them. AI coding tools have gotten surprisingly good at generating tests — and surprisingly bad at certain parts of it. The teams winning with AI in 2026 are not generating the most code. They are building processes to ship reliable code despite the fact that AI introduces roughly 1.7 times more bugs than humans, according to recent studies. Good test generation is a critical part of that process. ...

Most real applications are not just one container. A typical web app has: A web server (nginx) An API server (your app) A database (PostgreSQL) A cache (Redis) Running four separate docker run commands, connecting them manually, and managing their configuration is painful. Docker Compose solves this. What is Docker Compose? Docker Compose lets you define your entire application stack in a single YAML file. Then you start everything with one command: ...

AI coding tools are powerful, but they are blind. They can read your code, but they cannot see your GitHub issues. They can write database queries, but they do not know your schema. They can suggest fixes, but they cannot check your CI pipeline. MCP changes that. The Model Context Protocol connects your AI tools to external systems — databases, GitHub, file systems, APIs, and anything else you build a server for. Think of it as USB-C for AI. One standard protocol, many connections. ...

Most developers write prompts like text messages. Short, vague, and missing context. Then they wonder why AI generates code that misses the point. The difference between a prompt that produces usable code and one that produces garbage is not magic. It is structure. Research shows that well-structured prompts produce code that works on the first try significantly more often. And the sweet spot is shorter than you think — 150 to 300 words. ...

A Dockerfile is a text file with instructions that tell Docker how to build your image. Every Docker image — from nginx to postgres to your own app — starts with a Dockerfile. In this tutorial, you will learn every key Dockerfile instruction and write a complete, production-ready Dockerfile. Dockerfile Basics A Dockerfile is a plain text file named Dockerfile (no extension). Docker reads it top to bottom when building an image. Each instruction creates a new layer. ...

You use the same AI model as everyone else. You send similar prompts. But some developers get dramatically better results from AI coding tools. The difference is not the prompts — it is the context. Research shows that the same AI model swings from a 42% success rate to 78% on coding tasks based purely on the context it receives. That is not a small improvement. It is the difference between a tool that wastes your time and a tool that transforms your workflow. ...

GitHub Copilot has over 20 million users. It is the most widely adopted AI coding tool in the world. But most developers use it as a fancy autocomplete — they type code, Copilot suggests the next few lines, and they press Tab. That is maybe 30% of what Copilot can do. This article covers the rest: Agent Mode, the coding agent that turns issues into PRs, the CLI tool, and the features that make Copilot uniquely powerful for teams. ...

A lot happened in AI this week. Anthropic changed its mind about billing. A flaw in Microsoft Copilot could leak your 2FA codes. And a “homegrown” government model turned out to be a copy of two other models. Here is everything that matters for developers, in one short read. 1. Anthropic Paused Its Claude Billing Change Anthropic was about to change how the Claude Agent SDK is billed. Then it backed down. ...

Docker has two core concepts you must understand before anything else: images and containers. Beginners often confuse them. Once you understand the difference, everything else in Docker makes sense. What is a Docker Image? A Docker image is a read-only template. It contains everything your application needs to run: the OS filesystem, libraries, dependencies, and your application code. An image is built from a Dockerfile. Think of an image like a class in object-oriented programming. It defines what a container will look like. ...

Cursor is the most popular AI code editor in 2026. Millions of developers use it daily. But most of them only use Tab completion and basic chat. They are missing the features that make Cursor truly powerful. This article shows you everything Cursor can do — from inline editing to multi-file agents. By the end, you will use Cursor like a power user. If you need help choosing between Cursor and other tools, read Choosing Your AI Coding Tool first. For the Cursor vs Claude Code comparison, see our detailed comparison. ...