Skill UI

This skill provides a comprehensive, read-only audit of a development workspace, including active repositories, installed plugins, connected services, and environment configurations. It analyzes existing capabilities against best practices to identify functional gaps and recommends the most valuable ECC-native skills, hooks, and workflows needed to enhance the development experience. Ideal for setup planning and architectural reviews.

This guide provides comprehensive testing patterns for C# and .NET applications. It covers best practices using xUnit, FluentAssertions, and advanced techniques like mocking (NSubstitute/Moq), parameterized testing, and full integration testing using Testcontainers and WebApplicationFactory. Ideal for improving test quality, coverage, and developing robust, maintainable codebases.

This comprehensive guide covers idiomatic C# and modern .NET best practices for building robust, high-performance, and maintainable applications. Topics include immutability, dependency injection, explicit coding, proper async/await usage, the Options pattern, and the Result pattern. Essential reading for developers designing services with ASP.NET Core.

This resource is designed to document and guide the implementation of various architectural patterns and best practices when developing backend applications using the NestJS framework. It helps developers structure their code for maximum scalability and maintainability.

A comprehensive collection of agent skills for rigorously auditing digital interfaces and user flows. It evaluates designs against 168 research-backed UX/UI principles, detects common design antipatterns, and provides specialized review for AI-powered interfaces, ensuring adherence to modern best practices.

This skill functions as a Brand Psychologist and Semiotics Researcher. It diagnoses the subconscious signals (visual, verbal, behavioral) a market currently associates with a brand, identifying the 'perception gap' between the current schema and the desired brand position. It then prescribes minimal, high-leverage changes across all touchpoints to achieve perceptual alignment and build trust.

This skill simulates a Social Psychologist to diagnose specific trust barriers a target audience holds toward a brand, offer, or category. It prescribes the exact, strategic signals (e.g., credentials, transparency, proofs) needed to build credibility. Use it when communicating with skeptical audiences or when existing messaging fails to convert due to lack of trust. It calibrates trust across ability, benevolence, and integrity.

This skill provides comprehensive guardrails for handling Protected Health Information (PHI) in US healthcare software. It guides development teams on data classification, security best practices, access control, and audit logging to ensure strict adherence to HIPAA regulations. Use it when dealing with patient data storage, transmission, or processing to prevent breaches and maintain compliance.

This guide addresses the critical difference between standard Node.js SHA3-256 and the Keccak-256 hash function required by Ethereum. Using the wrong hash function can silently corrupt calculated function selectors, event topics, storage slots, and derived addresses. It provides best practices and code examples for using dedicated libraries (like ethers, viem, web3.js) to ensure correct, Ethereum-compliant hashing in JavaScript and TypeScript environments.

A comprehensive guide covering how to design, implement, and test state management using the bloc and flutter_bloc packages. Learn best practices for modeling state (sealed classes vs. enums), differentiating between Cubit and Bloc, handling naming conventions, and structuring your application architecture for scalability and testability.

This guide provides detailed best practices for writing and maintaining comprehensive End-to-End (E2E) test cases for the 'lark-cli' tool. It covers the entire workflow, from exploring live help documentation and identifying leaf commands, to structuring state-proving tests (e.g., read-after-write assertions) and generating the required `coverage.md` artifact. Use this when adding or significantly updating E2E coverage for any specific functional domain.

This comprehensive guide outlines idiomatic and high-quality coding standards for Dart and Flutter. It covers best practices for naming conventions, type annotations, class structure, file organization, and documentation, ensuring developers write clean, readable, and maintainable Dart codebases.