Development

Browser automation for documentation discovery. Use when curl fails on JS-rendered sites, when detecting available browser tools, or when configuring browser-based documentation collection.

Generic BAML patterns for type-safe LLM prompting. Covers schema design, DTO generation, client wrappers, and cross-language codegen. Framework-agnostic.

Specialized knowledge of Bash and Zsh scripting, shell automation, command-line tools, and scripting best practices. Use when the user needs to write, debug, or optimize shell scripts, work with command-line tools, automate tasks with bash/zsh, or asks for shell script help.

Modern R development practices emphasizing tidyverse patterns (dplyr 1.1 and later, native pipe, join_by, .by grouping), rlang metaprogramming, performance optimization, and package development. Use when Claude needs to write R code, create R packages, optimize R performance, or provide R programming guidance.

Comprehensive Python programming guidelines based on Google's Python Style Guide. Use when Claude needs to write Python code, review Python code for style issues, refactor Python code, or provide Python programming guidance. Covers language rules (imports, exceptions, type annotations), style rules (naming conventions, formatting, docstrings), and best practices for clean, maintainable Python code.

Expert guidance for creating and working with marimo notebooks - reactive Python notebooks that can be executed as scripts and deployed as apps. Use when the user asks to create marimo notebooks, convert Jupyter notebooks to marimo, build interactive dashboards or data apps with marimo, work with marimo's reactive programming model, debug marimo notebooks, or needs help with marimo-specific features (cells, UI elements, reactivity, SQL integration, deploying apps, etc.).

Load common code patterns and abstractions used in this project. Use when implementing features to maintain consistency.

Pattern for respecting file ownership boundaries during implementation. Prevents conflicts in parallel work.

Contract lifecycle management - creation, consumption, modification, and resolution.

Analyzes and optimizes application performance across frontend, backend, and database layers. Use when diagnosing slowness, improving load times, optimizing queries, reducing bundle size, or when asked about performance issues.

Manages Git workflows including branching, commits, and pull requests. Use when working with Git, creating commits, opening PRs, managing branches, resolving conflicts, or when asked about version control best practices.

Designs and implements testing strategies for any codebase. Use when adding tests, improving coverage, setting up testing infrastructure, debugging test failures, or when asked about unit tests, integration tests, or E2E testing.

Designs software architecture and selects appropriate patterns for projects. Use when designing systems, choosing architecture patterns, structuring projects, making technical decisions, or when asked about microservices, monoliths, or architectural approaches.

Designs REST and GraphQL APIs including endpoints, error handling, versioning, and documentation. Use when creating new APIs, designing endpoints, reviewing API contracts, or when asked about REST, GraphQL, or API patterns.

Analyzes codebases to understand structure, tech stack, patterns, and conventions. Use when onboarding to a new project, exploring unfamiliar code, or when asked "how does this work?" or "what's the architecture?"

Create an issue in GitHub or Jira. Automatically detects if GitHub issues are enabled; if so creates a GitHub issue, otherwise creates a Jira issue.

仕様駆動開発（SDD）の**上流工程**を担当するSkill。

仕様駆動開発（SDD）ワークフローを自動発動で強制。Subtask開始時にAC確認、TDD実行、完了時にACチェックを実施。スコープ外実装を禁止。Use when implementing features, creating new functionality, or when "実装して", "作成して", "開発して" keywords appear.

This skill should be used when the user asks about "rust workspace", "rust best practices", "cargo workspace setup", "rust code organization", "rust dependency management", "rust testing strategy", "rust project", "scalable rust", "rust CI setup", or needs guidance on senior-level Rust development patterns, workspace design, code organization strategies, or production-ready Rust architectures.

Security review or audit of code, architecture, or infrastructure - Threat modeling sessions - Reviewing PRs for security implications

Extend and apply the Visual Experience Engine across landing pages, inspiration galleries, and demos using safe, persona-aware animations and layouts. Use when adding or modifying visual experiences.

Independent verification of task completion - eliminates self-attestation

Handles frontend/UX/route work for Unite-Hub. Fixes UI bugs, implements React components, updates layouts, ensures responsive design, and maintains shadcn/ui consistency.

Maintains documentation files (README.md, .claude/claude.md, .claude/agent.md, API docs) for Unite-Hub. Ensures docs stay in sync with codebase changes. Uses Haiku model for cost-effective documentation generation.