Frontend

Implements Kysely type-safe SQL query builder with full TypeScript inference, migrations, and multi-database support. Use when building type-safe SQL queries, needing a lightweight ORM alternative, or wanting SQL control with TypeScript safety.

Use when code needs cleanup, simplification, or harmonization with codebase patterns. Identifies redundancies, removes complexity, and ensures adherence to project guidelines.

Use this skill when planning, researching, writing, reviewing, refactoring, or testing Go code (including creating unit tests, test files, and mocks). It provides comprehensive Go development guidelines including proverbs, SOLID principles, and testing standards. Apply these guidelines to ensure code quality, maintainability, and consistency in any Go project.

Builds user interfaces with React using components, hooks, state management, and modern patterns. Use when creating React components, managing state, handling side effects, optimizing performance, or integrating with frameworks.

Homeostatic actuator that tags code, tests, and commits with REQ-* keys for traceability. Adds "# Implements:" tags to code and "# Validates:" tags to tests. Use when code or tests are missing requirement tags.

React component patterns, styling conventions, and animation standards for CJS2026 UI development

Diagnose errors and failing tests in Laravel + React applications. Use when encountering bugs, exceptions,stack traces, 500 errors, TypeErrors, failing Pest/Vitest tests, or unexpected behavior. EXCLUSIVE to debugger agent.

Build Next.js 16 apps with App Router, Server Components/Actions, Cache Components ("use cache"), and async route params. Includes proxy.ts (replaces middleware.ts) and React 19.2.Use when: building Next.js 16 projects, or troubleshooting async params (Promise types), "use cache" directives, parallel route 404s (missing default.js), or proxy.ts CORS.

Guides adding new Higher Inductive Types to the ComputationalPaths library. Use when creating new HITs, defining fundamental group (pi1) calculations, implementing encode-decode proofs, or adding new topological spaces.

General development guidelines prioritizing readability over performance, with rules for meaningful comments. Use when writing any code in this project.

Guide for integrating Gemini AI models with Firebase using Firebase AI Logic SDK. This skill should be used when implementing Gemini features (chat, content generation, structured JSON output), configuring security (App Check), or troubleshooting issues (rate limits, schema errors).

Use when creating static websites with Next.js static export - covers YAML-based content, image optimization, form handling, SEO, and deployment to GitHub Pages/Netlify/Vercel

Use when implementing exchange rate functionality - provides complete patterns for fetching BTC/fiat exchange rates from Coinbase API, caching strategies, conversion utilities, and React hooks for displaying rates in UI

Design and build reusable UI components following Astro's server-first architecture with islands, proper component composition, TypeScript props, and strategic client-side hydration. Use this skill when creating or modifying Astro components, React/Vue/Svelte islands, layout components, or any reusable UI elements. When working on .astro component files, framework component files (.jsx, .tsx, .vue, .svelte), layout components, page components, component prop interfaces, slot implementations, client directive usage (client:load, client:idle, client:visible), scoped component styles, or component documentation and examples.

Expert guidance for debugging Next.js, React, and Playwright applications with modern tools and best practices.

Use this skill when the user wants to create Angular applications, generate Angular components/services/modules, or automate Angular development workflows. Handles scaffolding complete Angular apps with routing and guards, generating individual Angular artifacts, setting up project structure, and initializing git repositories with Angular best practices.

Follow development best practices including consistent project structure, clear documentation with README files, version control best practices with clear commit messages, environment configuration using environment variables, minimal dependency management, code review processes, testing requirements, feature flags for incomplete features, and changelog maintenance. Use this skill when organizing project files and directories, writing commit messages, managing dependencies, setting up environment configurations, establishing code review processes, or maintaining project documentation. This skill applies when working on project organization, git workflows, dependency management, or any project-level conventions.

Follow strict TDD methodology using Sherpa's workflow enforcement. Activates when implementing new features, adding functionality, or building code that requires tests. Ensures RED-GREEN-REFACTOR discipline with guide check/done tracking.

Create distinctive, production-grade frontend interfaces with high design quality. Use this skill when the user asks to build web components, pages, or applications. Generates creative, polished code that avoids generic AI aesthetics. (project)

Automates creation of MobX State Tree stores following Fitness Tracker App patterns for domain models, collections, and root store integration. Use when creating new MST stores, models, or extending existing store functionality with proper TypeScript typing, actions, views, and integration patterns.