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Compare and select investment vehicles including mutual funds, ETFs, index funds, and separately managed accounts. Use when the user asks about ETF vs mutual…

Writes Kani bounded model checker proofs for Rust programs. Proves conservation, isolation, arithmetic safety, and access control properties. Use when the user asks for Kani proofs, bounded model checking, or exhaustive formal verification -- or when code contains kani::, #[kani::proof], or #[kani::unwind]. Do NOT use for fuzzing (proptest, quickcheck, cargo-fuzz), property testing, or Miri.

Use when managing Xiaohongshu shop daily operations, handling inventory and orders, processing customer purchases, coordinating shipping and fulfillment, or…

Analyze stocks and cryptocurrencies using Yahoo Finance data. Supports portfolio management (create, add, remove assets), crypto analysis (Top 20 by market…

Compiler sanitizer skill for runtime bug detection in C/C++. Use when enabling and interpreting AddressSanitizer (ASan), UndefinedBehaviorSanitizer (UBSan),…

Background context for invoice-system input tax credit rules (仕入税額控除) in the shinkoku tax filing plugin. Contains eligibility requirements, the 6 permanent exceptions (帳簿のみ保存の恒久特例), transitional measures for purchases from tax-exempt businesses, and storage requirements. This skill is not user-invocable — Claude loads it automatically when responding to input tax credit questions under the invoice system.

Core Python development concepts, idioms, best practices, and language features. Covers Python 3.10+ features, type hints, async/await, and Pythonic patterns. For running scripts, see uv-run. For project setup, see uv-project-management. Use when user mentions Python, type hints, async Python, decorators, context managers, or writing Pythonic code.

next-forge expert guidance — production-grade Turborepo monorepo SaaS starter by Vercel. Use when working in a next-forge project, scaffolding with `npx…

Baseline C# skill loaded for every .NET code path. Guides language patterns (records, pattern matching, primary constructors, C# 8-15), coding standards,…

Step-by-step playbook for developing a NocoBase plugin, covering scaffolding, server-side code (collections, APIs, ACL, migrations), client-side code (blocks,…

Migrates apps from @coinbase/onchainkit to standalone wagmi/viem components. Handles provider replacement (OnchainKitProvider to WagmiProvider), wallet component replacement (Wallet/ConnectWallet to custom WalletConnect), and transaction component replacement. Use when the user says "migrate my onchainkit", "replace onchainkit provider", "migrate my wallet component", "replace my onchainkit wallet", "migrate my transaction component", "remove onchainkit dependency", or "move off onchainkit".

Creates step-by-step decomposition plans and migration roadmaps for breaking apart monolithic applications. Use when asking "what order should I extract…

Evaluate investment performance on a risk-adjusted basis using industry-standard ratios and capture analysis. Use when the user asks about Sharpe ratio,…

Apply Kahneman and Thaler's behavioral economics principles to marketing—understand how customers actually make decisions and design experiences that work with…

Use when creating image-based posts for Xiaohongshu, designing carousel content with multiple images, structuring visual tutorials or guides, or combining…

ALWAYS use when working with Angular Bootstrap, ng-bootstrap, Bootstrap components in Angular, or Bootstrap 5 integration.

Use when creating animations that soothe users, reduce anxiety, or create peaceful, meditative experiences.

Automatic graph layout using dagre with React Flow (@xyflow/react). Use when implementing auto-layout, hierarchical layouts, tree structures, or arranging…

The 100th skill! Your intelligent guide to all 99 other skills. Recommends the perfect skill for any task, creates skill combinations, and helps you discover…

Set of skills for developing/building apps on Monad. Always start with this skill, this skill helps the agent/llm maneuver and choose the right skills for the…