Expert Magic: The Gathering Commander (EDH) deck analysis, optimization, and building assistant. Use this skill whenever the user asks about Commander decks, EDH optimization, power level assessment, bracket placement, mana base construction, card cuts/additions, deck building, commander selection, synergy analysis, or multiplayer strategy. Also trigger on: 'analyze my deck', 'what should I cut', 'is this deck bracket 2 or 3', 'help me build around X commander', 'what ramp should I run', 'mana curve advice', 'budget upgrades for', 'how to improve my EDH deck', 'pregame conversation', 'power level check', 'Game Changers list', 'staples for', 'wincon', 'too much/not enough removal', or any mention of Commander, EDH, cEDH, multiplayer Magic deck building. Even if the user just pastes a decklist or a link to Moxfield/Archidekt, use this skill.
Clean / Hexagonal Architecture adapted to this Next.js 15 App Router + Prisma + React 19 project. Use when designing a new feature, adding a module, debating where code should live, reviewing a PR that crosses layers, or when the domain logic starts leaking into UI / routes.
Clean Code principles applied to this TypeScript / Next.js / React project, with a strong emphasis on eliminating duplication (DRY). Use before writing new code, during refactors, after Sonar flags duplicated_lines, or when reviewing a PR that adds similar-looking code to existing modules.
PageSpeed and Core Web Vitals checklist for web projects. Use when building UI, shipping a page, reviewing front-end code, or running /audit-code or /beautify on a web target.
Magic: The Gathering learning assistant and gameplay guide. Use this skill whenever someone asks how Magic works, wants to learn the game, needs gameplay concepts explained, or is discovering the Commander format. Trigger on: 'how does Magic work', 'explain MTG to me', 'I'm new to Magic', 'what are the phases', 'how does combat work', 'what is the stack', 'how do I start playing Commander', 'what is color identity', 'teach me MTG', 'explain mana', 'what does flying do', 'keyword abilities explained', 'how do turns work', 'EDH for beginners', 'how to build my first deck', or any question from someone learning Magic. Also trigger when someone understands basics but is transitioning to Commander/EDH and needs format-specific guidance. Even vague questions like 'I want to get into Magic' or 'my friend plays Commander and I want to learn' should trigger this skill.
Magic: The Gathering comprehensive rules reference and rules engine. Use this skill whenever the user asks about MTG rules, card interactions, game mechanics, timing, priority, layers, state-based actions, combat, stack resolution, or any rules question about Magic: The Gathering. Also trigger on: 'how does X work in MTG', 'can I do X in response to Y', 'what happens when', 'is this legal', 'rules question', 'judge call', 'layer system', 'replacement effects', 'triggered abilities', 'state-based actions', 'commander damage', 'color identity', or any dispute about how a card or mechanic works. Even casual questions like 'does this combo work' or 'what happens if I play X' should trigger this skill.
Professional TypeScript + React + Next.js coding standards enforcer. Use this skill whenever writing, reviewing, or refactoring TypeScript code in any project — whether it's a new feature, a bug fix, a refactoring pass, or a code review. Trigger on: any TypeScript or TSX file creation/editing, "clean up this code", "refactor", "optimize", "review my code", "best practice", "design pattern", "architecture", "performance", "type safety", "how should I structure this", "is this the right pattern", or any request involving writing production-quality TypeScript. Also trigger when the user pastes code and asks for improvements, when implementing a feature from scratch, or when discussing how to organize a React/Next.js codebase. Even if the user just says "write this function" — use this skill to ensure the output meets professional standards. Do NOT trigger for non-TypeScript languages (Python, Rust, Solidity have their own skills) unless the user explicitly asks for TS patterns applied elsewhere.