Skills
96,770 packaged capabilities and playbooks for agents. Install any of them with one command.
Development
Use when commits on a feature branch are messy, out of logical order, mix unrelated changes, or need restructuring before a PR - also triggered by "clean up history", "reorganize commits", "recompose branch", "make commits logical", or similar
Implement Recur checkout flows including embedded, modal, and redirect modes. Use when adding payment buttons, checkout forms, subscription purchase flows, or when user mentions "checkout", "結帳", "付款按鈕", "embedded checkout". Taiwan subscription billing via PAYUNi (recur.tw, 台灣訂閱金流).
Refactor ASP.NET Core/C# code to improve maintainability, readability, and adherence to best practices. Transforms fat controllers, duplicate code, and outdated patterns into clean, modern .NET code. Applies C# 12 features like primary constructors and collection expressions, SOLID principles, Clean Architecture patterns, and proper dependency injection. Identifies and fixes anti-patterns including service locator, captive dependencies, and missing async/await patterns.
Repository packaging for AI/LLM analysis. Capabilities: pack repos into single files, generate AI-friendly context, codebase snapshots, security audit prep, filter/exclude patterns, token counting, multiple output formats. Actions: pack, generate, export, analyze repositories for LLMs. Keywords: Repomix, repository packaging, LLM context, AI analysis, codebase snapshot, Claude context, ChatGPT context, Gemini context, code packaging, token count, file filtering, security audit, third-party library analysis, context window, single file output. Use when: packaging codebases for AI, generating LLM context, creating codebase snapshots, analyzing third-party libraries, preparing security audits, feeding repos to Claude/ChatGPT/Gemini.
Use when writing Python code with the Rich library — console output with markup, tables, progress bars, syntax highlighting, pretty printing, logging, or tracebacks. Covers Console, markup syntax, renderables (Panel/Table/Tree), Progress, Live, RichHandler, and the __rich_console__ protocol.
Gate 0 research phase for pre-dev workflow. Dispatches 4 parallel research agents to gather codebase patterns, external best practices, framework documentation, and UX/product research BEFORE creating PRD/TRD. Outputs research.md with file:line references and user research findings.
Use RocketSim to inspect visible UI and interact with iOS Simulator apps. Detects the installed RocketSim version, loads the matching bundled RocketSim CLI guidance, and helps agents read visible accessibility elements, navigate screens, tap, long-press, swipe, type text, press simulator hardware buttons, and automate simulator flows reliably. Use when: (1) the user mentions RocketSim, the rocketsim command, or RocketSim CLI, (2) interacting with an app in the iOS Simulator, (3) navigating or testing a simulator app with AI, (4) reading visible UI state or accessibility elements, (5) tapping, long-pressing, swiping, typing, or pressing simulator buttons, (6) using RocketSim instead of ad-hoc simulator automation.
Technical SEO auditor and fixer. Use when the user wants to: - Run a Lighthouse/PageSpeed audit on a website or local dev server - Analyze SEO, performance, accessibility, or best practices scores - Fix technical SEO issues in their codebase - Optimize meta tags, structured data, Core Web Vitals - Improve page speed, accessibility, or PWA compliance Triggers: "audit my site", "check SEO", "fix SEO", "lighthouse", "pagespeed", "improve performance", "meta tags", "structured data", "core web vitals"
Analyzes legacy RPG (Report Program Generator) programs from AS/400 and IBM i systems for migration to modern Java applications. Extracts business logic from RPG III/IV/ILE source code, identifies data structures (D-specs), file operations (F-specs), program dependencies (CALLB/CALLP), and converts RPG constructs to Java equivalents. Generates migration reports, complexity estimates, and Java implementation strategies with POJO classes, JPA entities, and service methods. Use when modernizing AS/400 or IBM i legacy systems, analyzing RPG source files (.rpg, .rpgle, .RPGLE), converting RPG to Java, mapping data specifications to Java classes, planning legacy system migration, or when user mentions RPG analysis, Report Program Generator, RPG III/IV/ILE, AS/400 modernization, IBM i migration, packed decimal conversion, or mainframe application rewrite.
Cross-cutting runtime APIs for Decentraland SDK7 scenes. Use when the user needs async operations (executeTask), HTTP requests (fetch, signedFetch), WebSocket connections, timers, realm/scene detection, restricted actions (movePlayerTo, teleportTo, triggerEmote, openExternalUrl), portable experiences, or the testing framework. Do NOT use for UI (see build-ui), multiplayer sync (see multiplayer-sync), or avatar/player data (see player-avatar).
Build and debug SceneKit scenes where one 3D object (a product, badge, coin, wheel) performs on a transparent stage inside a SwiftUI app - studio lighting, real shadows, baked keyframe choreography, hand-rolled physics, gestures and haptics, multi-scene sequencing. Use when working with SCNView or SceneView in SwiftUI, UIViewRepresentable 3D scenes, product or hero-object animation, roll or spin entrances, a first-frame hitch when a scene appears, shadows missing or wrong, metal rendering black, choreographed 3D motion that must stay interruptible, a continuous vapor stream (vent air, steam, mist) drawn as a shader-driven sheet, a liquid-metal or jelly blob (noise-deformed surface with mirror reflections and tap ripples), chrome or gold that looks cartoon-flat instead of real, HDRI image-based lighting, free trackball rotation of an actor, deterministic screenshot testing of shader-driven scenes, cutting an actor in two with a finger swipe (runtime mesh slicing with sealed cross-sections and a falling piece), a die-struck relief object (badge, coin, medallion) built from a heightfield with multiple finishes on one mesh, an actor crumbling into debris that falls and rests on the floor, reproducing a real object's motion from photos or video, or keyframed motion that stutters at its own keyframes. Not for RealityKit, ARKit, visionOS, or full game worlds.
Expert in building immersive scroll-driven experiences - parallax storytelling, scroll animations, interactive narratives, and cinematic web experiences. Like NY Times interactives, Apple product pages, and award-winning web experiences. Makes websites feel like experiences, not just pages. Use when "scroll animation, parallax, scroll storytelling, interactive story, cinematic website, scroll experience, immersive web, " mentioned.
A lightweight AI Agent harness / checkpoint-driven coding skill for strong models such as GPT-5.4 and expert users. It assumes the user has already sliced the task down to the smallest executable unit of chaos; the model decomposes, explores and pushes forward on its own, while the human keeps low-interference control through the final goal, minimal spec, restatement, checkpoints, evidence verification and write-back.
Designing search engines and vector DBs for full-text, vector, and hybrid retrieval, including permission-aware retrieval for multi-tenant or per-role corpora. Use for search design, index optimization, the RAG retrieval layer, or deciding where ACL filtering belongs in the query path.
Guides senior software engineering across languages and stacks—system and service design, RFCs, code review, refactoring, reliability patterns, testing strategy, performance analysis, technical decomposition, and engineering leadership on delivery teams. Use when designing services or modules, writing technical specs, reviewing PRs for architecture and correctness, improving legacy code, choosing trade-offs (coupling, consistency, latency), estimating complex work, or mentoring engineers—not for stack-specific full-stack UI delivery (senior-fullstack-developer), deployment rollout strategy (deployment-strategist), infrastructure/IaC (infrastructure-engineer), dedicated perf profiling and load testing (performance-engineer), org-wide security programs (cybersecurity), or cross-system ADRs and architecture review (senior-system-architecture).
Implement technical SEO infrastructure for Next.js apps. Use this skill when setting up sitemaps, robots.txt, meta tags, OpenGraph, structured data (JSON-LD), canonical URLs, and other technical SEO elements. Covers Next.js 15/16 App Router patterns and 2025 best practices.
Set up the `## Agent skills` block in AGENTS.md/CLAUDE.md and `docs/agents/` so engineering skills know this repo's issue tracker (GitHub or local markdown), triage label vocabulary, and domain docs layout. Run before first use of `to-issues`, `to-prd`, `triage`, `diagnose`, `tdd`, `improve-codebase-architecture`, or `zoom-out` — or if those skills seem to lack context about the issue tracker, triage labels, or domain docs.
Generates, details, splits, and maps agile user stories. Applies INVEST, 5Cs, BDD/Gherkin, "Three Amigos" approaches, NFRs/DoD assessment, 10 Story Splitting strategies, and the User Story Mapping model (Backbone, Narrative Flow, Slicing), maximizing value (Outcome) over quantity (Output).
Blockchain smart contract specialist for Solidity, EVM, security patterns, and gas optimizationUse when "smart contract, solidity, ethereum, evm, contract, web3, gas optimization, upgradeable contract, reentrancy, solidity, ethereum, smart-contracts, evm, web3, blockchain, defi, nft, security, gas" mentioned.
Use this skill when a user is choosing between SolvaPay surfaces rather than implementing one. Load for: any query that pits two options against each other ("checkout or SDK?", "MCP vs checkout?", "which one for my app?"), capability questions about SolvaPay, vague billing or monetization intent with no specific surface chosen, or assigned SolvaPay work without clear direction. Skip when the user has settled on exactly one surface and is asking to build it — single-surface intent plus implementation context (tech stack, command, or action verb) routes to that surface's dedicated skill instead.
Coding rules generator — Extract and generate coding-rules.md from project conventions. Scans CLAUDE.md, AGENTS.md, config files, existing source code, and installed skills to produce a unified coding-rules.md that spec-implement uses as a quality gate. English triggers: "Generate coding rules", "Create coding-rules.md", "Extract project rules" 日本語トリガー: 「コーディングルールを生成」「coding-rules.mdを作成」「プロジェクトルールを抽出」
Comprehensive Spring Framework and Spring Boot best practices including dependency injection patterns, bean lifecycle and scopes, REST API development, Spring Data JPA, service layer design, Spring Security, testing strategies, caching, AOP, async processing, error handling, and common anti-patterns. Essential reference for code reviews and Spring Boot application development.
Diagnose Kotlin + Spring failures from stack traces, startup logs, runtime logs, and related metric anomalies, then separate root causes from wrapper exceptions and propose safe next steps. Use when the application fails to start, an endpoint crashes, logs are noisy or deeply nested, or the agent must produce both a quick mitigation and a proper long-term fix without guessing.
Specialist for designing Swift libraries, SDKs, and logic layers. Use when building Swift packages, designing public APIs, or implementing Swift 6 concurrency patterns. Focuses on type safety, discoverability, and library evolution following Progressive Disclosure.
New to MCP?
From what the protocol is to installing your first server, these answers cover most first questions.
An open protocol that defines how AI applications connect to external tools and data in a uniform way. Clients talk to the model; MCP servers provide tools, resources and prompt templates. They exchange standard messages, so one server can be reused by many clients.