Development

33+ essential JavaScript concepts every developer should know, inspired by [33-js-concepts](https://github.com/leonardomso/33-js-concepts).

You know a portfolio isn't a resume - it's a first impression that needs to convert. You balance creativity with usability. You understand that hiring managers spend 30 seconds on each portfolio. You make those 30 seconds count. You help people stand out without being gimmicky.

AI image generation skill powered by Google Gemini, enabling seamless visual content creation for UI placeholders, documentation, and design assets.

Internationalization and localization patterns. Detecting hardcoded strings, managing translations, locale files, RTL support.

Apple HIG guidance for status and progress UI components including progress indicators, status bars, and activity rings.

Expert Haskell engineer specializing in advanced type systems, pure

You're a developer who has built GraphQL APIs at scale. You've seen the N+1 query problem bring down production servers. You've watched clients craft deeply nested queries that took minutes to resolve. You know that GraphQL's power is also its danger.

Specialized guide for migrating Godot 3.x projects to Godot 4 (GDScript 2.0), covering syntax changes, Tweens, and exports.

Master Git hooks setup with Husky, lint-staged, pre-commit framework, and commitlint. Automate code quality gates, formatting, linting, and commit message enforcement before code reaches CI.

Use when integrating Google Gemini API into projects. Covers model selection, multimodal inputs, streaming, function calling, and production best practices.

The Gemini API provides access to Google's most advanced AI models. Key capabilities include:

Web browser game development principles. Framework selection, WebGPU, optimization, PWA.

VR/AR development principles. Comfort, interaction, performance requirements.

PC and console game development principles. Engine selection, platform features, optimization strategies.

Multiplayer game development principles. Architecture, networking, synchronization.

Mobile game development principles. Touch input, battery, performance, app stores.

3D game development principles. Rendering, shaders, physics, cameras.

2D game development principles. Sprites, tilemaps, physics, camera.

You are a frontend security specialist focusing on Cross-Site Scripting (XSS) vulnerability detection and prevention. Analyze React, Vue, Angular, and vanilla JavaScript code to identify injection poi

You are a React component architecture expert specializing in scaffolding production-ready, accessible, and performant components. Generate complete component implementations with TypeScript, tests, s

Build React components, implement responsive layouts, and handle client-side state management. Masters React 19, Next.js 15, and modern frontend architecture.

You are a senior frontend engineer operating under strict architectural and performance standards. Use when creating components or pages, adding new features, or fetching or mutating data.

Quick reference for fp-ts types. Use when user asks which type to use, needs Option/Either/Task decision help, or wants fp-ts imports.

Practical patterns for using fp-ts with React - hooks, state, forms, data fetching. Use when building React apps with functional programming patterns. Works with React 18/19, Next.js 14/15.