Hands-on notes on AI, open-source LLMs, developer tools, and the occasional weekend project.
Hands-on writing on local LLMs and AI tooling (Ollama, Gemma, Claude), developer environments (macOS, Linux, terminal workflows), Java and the JVM, and the kind of small web-infrastructure problems that quietly eat afternoons. Every post is written by a human, based on first-hand experience — no sponsored content and no AI-generated filler.
Bots hammering your API, brute-force attempts on /login, runaway clients eating connections — Nginx's built-in limit_req module stops abusive traffic in just a few lines of config. This guide starts from the leaky bucket algorithm, breaks down every parameter of limit_req_zone and limit_req with diagrams, compares the three common modes, and ends with battle-tested examples plus monitoring tips.
Anthropic launched Claude Design on April 17, 2026 — an experimental product powered by Claude Opus 4.7 that turns natural-language prompts into prototypes, slides, pitch decks, mockups, and one-pagers. It exports to Canva, PDF, PPTX, standalone HTML, and a Claude Code handoff bundle, and can ingest your codebase or design files to auto-build a reusable design system. This post covers the core features, subscription tiers, positioning against Figma, Canva, Google Stitch, v0, and Lovable, why Figma's stock dropped 7% on launch day, and the situations where Claude Design is not the right tool.
Open Terminal sitting at your Mac, then SSH into the same machine as the same user — both spawn what looks like the same zsh, but they behave very differently: keychain unlock state, environment variables, TCC permissions, pbcopy, TouchID, osascript notifications all diverge. Every one of those differences traces back to a single thing — whether launchctl managername reports Aqua or Background. This post walks through the gotchas you actually hit, the launchd domain machinery underneath, and how to make SSH sessions behave more like GUI ones when you're treating a Mac as a server.
Java 17 promoted sealed classes and interfaces to a standard feature after debuting as a preview in Java 15. This post walks through how sealed, non-sealed, permits, and final fit together to give you precise control over who can extend a class or implement an interface — plus a step-by-step animal hierarchy example (Animal → Chordata → Bird → Parrot / Penguin) that demonstrates every state in action.
Homebrew is the most popular package manager for macOS. Install, update, and remove software with a single command — no DMG downloads or manual configuration. This beginner's tutorial walks through installation, Formulae, Casks, upgrades, health checks, and running packages as system services.
Hibernate's LazyInitializationException ("failed to lazily initialize a collection") is a classic pitfall when reading foreign-key collections outside an active session. This article explains why it happens — fetch types, the session lifecycle, proxy traps — and walks through the recommended `@Transactional` fix plus the `FetchType.EAGER` alternative.