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ALWAYS use when testing Angular applications with Cypress, E2E testing, or component testing in Angular.

Prompt engineering for production LLMs — structured outputs, RAG, tool workflows, and safety. Use when designing or debugging prompts for LLM APIs.

Guide the design and implementation of order lifecycle management in trading systems. Use when building an order state machine for an OMS or EMS, implementing…

Use this skill when designing free tools and calculators for lead generation and SEO

ALWAYS use when working with Angular Signals and HttpClient, toSignal, toObservable, or HTTP with signals.

Live affiliate program data from list.affitor.com. Search programs, compare commissions, check cookie days, find top performers. Use when researching affiliate programs, comparing options, or checking program details. Persistent daemon with cache — first call starts server (~2s), subsequent calls ~100ms.

Estimate potential future losses using VaR, Expected Shortfall, Monte Carlo simulation, and stress testing. Use when the user asks about Value-at-Risk, CVaR,…

Guides competitive idea generation and ranking using tree-structured search (up to N_I=21 candidates across technique/domain/formulation axes) and Elo…

Error pattern analysis and troubleshooting for Claude Code sessions. Categorizes errors (network, auth, model, tool, memory, permission) with known resolution…

ALWAYS use when working with Angular CLI, generating components, services, building applications, or workspace configuration in Angular projects.

ALWAYS use when working with Angular Components, component architecture, @Component decorator, inputs, outputs, or component design patterns.

Use when developing application modules or microservices with the tinystruct Java framework. Covers routing, context management, JSON handling with Builder,…

Summarizes WeChat group chat highlights into a structured digest using the local wx-cli binary (https://github.com/jackwener/wx-cli). Generates a normal digest…

ALWAYS use when working with Angular ViewChild, ContentChild, ViewChildren, or accessing DOM elements and child components in Angular.

View, search, and download academic papers from arXiv. Supports API queries, web scraping via Actionbook, and HTML paper reading via ar5iv. Use when user asks…

Optimize MATLAB code for better performance through vectorization, memory management, and profiling. Use when user requests optimization, mentions slow code,…

pydantic-ai-testing — an installable skill for AI agents, published by existential-birds/beagle.

Video, audio, and streaming media accessibility reference. WebVTT/SRT/TTML caption formats, audio description patterns, accessible media player ARIA, WCAG…

Use when creating animations that feel warm, welcoming, and make users feel comfortable engaging.

AWS Cognito user authentication and authorization service. Use when setting up user pools, configuring identity pools, implementing OAuth flows, managing user…