Fabian Magrini | Blog

Skills are everywhere. Since Anthropic launched Claude Code , the ecosystem has exploded with custom "Skills"—directories of instructions and scripts that teach Claude how to handle specific domains. But there is a problem: almost nobody is testing them. Most developers "vibe-check" their skills with a few manual prompts, see a good response, and ship it. You wouldn’t ship a TypeScript library without a test suite, so why ship a Skill without an evaluation? This is a practical guide to fixing that. What Are Claude Code Skills? Agent Skills are folders that augment Claude's capabilities without retraining the model. They follow a progressive disclosure pattern, meaning Claude only loads the full instructions when it thinks they are relevant. At a minimum, a skill requires a SKILL.md file in .claude/skills/ : --- name: ts-zod-architect description: Use this skill when the user wants to define data models or API schema...

If you’ve been following the TypeScript ecosystem lately, you know we are standing on the precipice of the biggest shift in the language’s history. Microsoft has just announced the TypeScript 6.0 Beta (released Feb 11, 2026), and while it brings excellent new features, its true purpose is to serve as the final bridge to the revolutionary TypeScript 7.0 —the native, Go-based compiler rewrite known internally as "Project Corsa." In this post, we’ll break down exactly what is shipping in TypeScript 6.0, what the native future of TypeScript 7.0 looks like, and how you should prepare your codebase today. TypeScript 6.0: The Bridge to the Future Status: Beta available now ( npm install -D typescript@beta ); Stable release planned for March 17, 2026 . TypeScript 6.0 is a historic release. It is officially the last major version of TypeScript based on the original JavaScript/TypeScript codebase ...

Work in progress https://gist.github.com/fabianmagrini/27cf52240cd062f9b0c4b412797b84e9