Development

Expert on Move programming language - abilities (copy/drop/store/key), generics, phantom types, references, global storage operations, signer pattern, visibility modifiers, friend functions, inline optimization, and advanced type system. Triggers on keywords move language, abilities, generics, phantom type, borrow global, signer, friend, inline, type parameter

MANDATORY for ANY questions about Acme Corp internal product codes, employee IDs, server names, project codes, or internal systems. Contains proprietary company data NOT available in public documentation.

Common Shopify Admin GraphQL API patterns for product queries, metafield operations, webhooks, and bulk operations. Auto-invoked when working with Shopify API integration.

This skill should be used when designing context management, implementing tiered fidelity, reducing token waste, applying Four Laws patterns, creating "NOT PASSED" sections, optimizing agent context, or debugging context-related issues. Provides SOTA patterns for context-efficient multi-agent systems achieving 60-80% token reduction.

Use when animation causes user confusion, delays task completion, or creates frustration

.NET/C#のコーディング規約、命名規則、レイアウト、C# 12/13/14の最新機能活用ガイドラインを定義する。C#/.NETコード作成時、クラス・メソッド命名時、コードフォーマット時、またはユーザーがコーディング規約、命名規則、C#ベストプラクティス、Primary Constructors、Collection Expressions、field キーワードに言及した際に使用する。

Guidance for working with Awkward Array 2.0 jagged arrays and records in Python. Use when building or debugging `awkward` workflows, including record construction with `ak.zip`, adding fields with `ak.with_field`, filtering/aggregation, combinatorics (`ak.cartesian`/`ak.combinations`), `argmin`/`argmax` slicing, flattening, sorting, and NumPy interop or common Awkward pitfalls.

Set up favicon and PWA manifest for website projects. Creates favicon.ico, apple-touch-icon, and site.webmanifest. Use at project end before release. Triggers on "favicon", "PWA", "manifest", "app icon".

Suggest refactoring opportunities to improve code structure and maintainability. Use when improving code design or reducing complexity.

Git commit best practices with conventional commits format and atomic commit principles. Use when committing code to ensure clear, meaningful commit history with proper type prefixes and semantic versioning support.

Recognize when user requests new feature implementation and prompt for TDD workflow. Triggers on phrases like "implement", "create function", "add feature", "build a", "write code for". Suggests generating failing tests first.

MANDATORY adversarial code review. Use before ANY commit to find security vulnerabilities, logic flaws, and edge cases. Actively tries to break the code.

Search Claude conversation history from JSONL files. Use when looking for previous discussions, past decisions, code solutions, or context from earlier conversations.

Execute a single phase from roadmap to working code autonomously

Auto-invoke when reviewing React, Vue, or frontend component code. Enforces component architecture, state management patterns, and UI best practices.

Leverage iterator chains for efficient, lazy data processing without intermediate allocations. Use when processing collections.

Persistence and human-in-the-loop patterns for LangGraph. Use when implementing checkpointing, saving/restoring graph state, adding human approval workflows, managing conversation memory across sessions, enabling time-travel debugging, or building fault-tolerant agents that resume from failures.

Manages parallel conversation branches using git worktrees. Use when you want to explore multiple solution approaches simultaneously, need to try different implementations, or want to checkpoint your current conversation state before branching into alternative paths.

Guide for creating Claude Code skills that mirror library documentation. Covers sync strategies, SKILL.md structure, and best practices.

Lombok annotations and best practices for Java 21+ projects. Use when reducing boilerplate, configuring builders, or choosing between Lombok and Records.