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Alexander Opalic is a full stack developer passionate about web experiences, tech trends, and continuous learning.

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Mutation testing reveals test gaps by introducing bugs and checking if tests fail, offering a more reliable measure of test quality than code coverage alone.
Create a real-time, offline-capable todo app with Jazz and Vue 3, leveraging collaborative data structures for seamless synchronization and user experience.
Agent teams in Claude Code enable direct communication among AI sessions, improving collaboration for complex tasks while emphasizing the need for prior planning.
A detailed guide on using Claude Code for Spec-Driven Development to efficiently migrate a sync engine from SQLite to IndexedDB through structured phases and AI assistance.
The post explores how GitHub Copilot agents enhance LLM capabilities through tools, context engineering, and specialized subagents for improved automation in VS Code.
Create a conversational AI interface for your personal knowledge base that allows you to query notes and receive synthesized answers based on your own insights.
In five years, developers will rely on AI to generate code, shifting the focus from coding to software engineering and strategic decision-making.
Quinn, an AI-powered QA engineer, automates browser testing using Claude Code and Playwright MCP, enhancing efficiency and bug detection in software development.
The article discusses a custom Test-Driven Development (TDD) workflow using Claude Code, addressing its limitations in implementing TDD effectively. It introduces a multi-agent system that utilizes Claude's 'Skills' and 'Hooks' to...
A structured ESLint setup for Vue projects is shared, focusing on readability, maintainability, and effective coding practices to enhance collaboration and reduce technical debt.
A new skill for Claude Code allows users to search conversation history, making it easier to recall past solutions and discussions for improved coding efficiency.
A practical guide to testing Vue 3 applications with Vitest, focusing on composable unit tests, integration tests, and effective data management strategies.
A walkthrough skill for AI coding agents creates interactive diagrams to help visual learners navigate and understand complex codebases quickly and effectively.
VS Code's January 2026 update enhances Copilot with smarter subagents, a new skills system, and significant terminal improvements for better user workflows.
The post argues against using Nuxt's MCP for AI, promoting custom research agents that efficiently access current documentation via llms.txt instead.
A guide on utilizing Claude Code's tools for effective project context management and workflow automation, focusing on CLAUDE.md, slash commands, subagents, and skills.
Customize Claude Code's spinner verbs with One Piece references for a more engaging user experience by modifying the settings in ~/.claude/settings.json.
Maintaining a concise CLAUDE.md and using automated tools for coding standards can enhance AI coding efficiency and prevent context overload.
Enhancing Claude Code with Age of Empires sound effects through a hooks system improves workflow and adds fun to the terminal experience.
VMark provides animated hand-drawn annotations for presentations, enhancing emphasis and audience focus through various customizable annotation types and timing controls.
This guide provides key patterns for creating reliable and maintainable Vue 3 composables, emphasizing best practices in structure, naming, and TypeScript usage.
The blog post explains how to use hooks in Claude Code to receive desktop notifications for specific events, such as permission prompts and idle waits. It provides a step-by-step guide on setting up these notifications, including ...
Transform your blog posts into engaging slides with presentation mode by using simple markdown syntax and keyboard shortcuts.
A guide to creating a custom status line for Claude Code that displays model and context information in the terminal.