Tmux handles pane splitting and window management well out of the box, but most people stop there. The real gains come from treating tmux as infrastructure. You script your session layouts so one command rebuilds your whole dev environment. You keep sessions alive across reboots so you never lose context. You add plugins for clipboard sync, fuzzy finding, and pattern matching. With tmux 3.6a and a few good plugins, your terminal becomes a persistent, scriptable IDE rather than a simple multiplexer.

Aider is the open-source AI pair programming tool that shipped before Claude Code , Codex CLI , and Gemini CLI . It is still the only major AI coding assistant that lets you pick whichever language model you want. Claude, GPT-5, Gemini, DeepSeek, Grok, a local model through Ollama : Aider connects to all of them. The project sits at 42K GitHub stars, 5.7 million pip installs, and 15 billion tokens per week. It ships under Apache 2.0, so the tool itself costs nothing. You only pay for API tokens at provider rates, which runs $30 to $60 per month for most developers.

Tailwind CSS v4 is a ground-up rewrite. The JavaScript-based PostCSS plugin is gone. In its place is a Rust-powered engine called Oxide. Configuration moves from tailwind.config.js into CSS-native @theme directives. Full builds run up to 5x faster, and incremental builds over 100x faster. The entry point is now a single @import "tailwindcss" line instead of three @tailwind directives. Most v3 projects can migrate in under an hour with the official @tailwindcss/upgrade codemod. Still, knowing what changed, and why, prevents surprises during the move.

Sway is the most stable, battle-tested tiling compositor for developers who want an i3-like setup with zero surprises. Hyprland offers the flashiest animations and deepest customization. It also demands more tinkering. COSMIC from System76 is the best pick if you want a polished, full desktop with tiling built in, instead of stitching a compositor together by hand.

The right pick depends on how you actually work. How many monitors do you run? Do you want to set up everything by hand? How much patience do you have for the odd glitch? Those answers map straight to the splits across design, display handling, tiling models, plugins, and real-world stability.

The numbers are in, and they’re bad. Escape.tech scanned 5,600 vibe-coded apps in the wild. It found over 2,000 bugs, more than 400 exposed secrets, and 175 leaks of personal data, including medical records and IBANs. A separate December 2025 audit by Tenzai found 69 flaws across just 15 test apps built with five popular AI coding tools. Georgia Tech’s Vibe Security Radar tracked CVEs caused by AI-generated code. They climbed from 6 in January 2026 to 35+ by March. The incidents aren’t hypothetical now. They’re outages, leaked databases, and wiped customer records.

A WebSocket chat needs two pieces. The server holds open connections and sends each message to every client. The browser client opens a socket, sends text on form submit, and shows new messages in the page. This build uses Node.js with the ws library and plain JavaScript on the client. No React, no Socket.IO, no build step. The whole thing fits in under 150 lines and handles dozens of users at once on a cheap server. This tutorial walks through every part.