Skill UI

A set of behavioral guidelines derived from Andrej Karpathy's observations to help users writing, reviewing, or refactoring code with Large Language Models (LLMs). It guides developers to avoid overcomplication, make surgical changes, explicitly surface assumptions, and define verifiable success criteria, promoting clean, simple, and robust code development.

A comprehensive tool for managing the entire Android development lifecycle from the terminal. It allows users to create new projects, manage SDK packages, interact with emulators and physical devices, run detailed tests, inspect UI layouts, and search official Android documentation via CLI commands. Essential for professional Android developers.

A comprehensive guide for building production-ready Android applications. Covers native development with Kotlin and Java, cross-platform frameworks like Flutter and React Native, and hybrid architectures. Includes best practices for architecture, UI design, testing, CI/CD pipelines, performance optimization, and debugging to ensure high-quality app delivery.

A comprehensive guide for building production-quality Android applications using Jetpack Compose. This skill covers modern architectural patterns (MVVM/MVI), robust state management with StateFlow, optimized UI rendering, type-safe navigation setup, and performance best practices (e.g., recomposition control). Use this skill when developing complex, modern Android user interfaces.

Expert guidance for modern Angular (v20+) development, covering Signals, Standalone Components, Zoneless apps, SSR/Hydration and reactive patterns to build and optimize high-performance frontend applications.

Modern Angular UI patterns for loading states, error handling, and data display. Use when building UI components, handling async data, or managing component states. Ideal for frontend development tasks involving state management and user interface implementation.

This skill provides a comprehensive playbook for setting up and orchestrating multi-agent systems using the standalone Antigravity 2.0 Agent Manager alongside the Antigravity IDE. It guides developers on creating a dual-window workspace to coordinate specialized AI agents (e.g., front-end, back-end, QA) to work in parallel on a single codebase, significantly boosting development efficiency and managing concurrent code changes.

A comprehensive guide and skill for building robust, production-ready REST API endpoints. This skill covers full lifecycle development, including input validation, centralized error handling, authentication/authorization checks, CRUD operations, pagination, and generating proper API documentation. It ensures that back-end services are secure, scalable, and adhere to industry best practices.

This skill specializes in creating realistic mock services for development, testing, and demonstration purposes. It simulates real API behavior to enable parallel development and facilitate thorough testing. Use it for building mock APIs for frontend or integration testing, simulating partner APIs, creating demo environments, and validating API contracts before backend completion. Avoid using for production systems or security testing.

Learn to create, modify, and deploy serverless Apify Actors using CLI tools. Covers project setup, template selection, coding logic, configuration, and security best practices for web scraping and automation tasks.

Design and build official Apify integrations for company products with minimal external help. Covers workflow automation, AI agent plugins, framework packages, and direct clients. Includes guidance on vocabulary mirroring, asynchronous run flows, and cost controls. Use Apify MCP for research and follow category-specific reference files for UX design and capability matrices to ensure a first-class integration.

A goal-integrity skill for backend/API/persistence work that preserves existing behavior, handles tests/validation, mocks, and multi-part requests. Emits Goal Contracts, Deviation Notices, Phase Checks, and Final Audits. Ensures agents stay aligned with user's original intent during complex development tasks.