building-chatgpt-apps
Skills（SKILL.md）は、AIエージェント（Claude Code、Cursor、Codexなど）に特定の能力を追加するための設定ファイルです。
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Use this skill when creating new Claude Code skills from scratch, editing existing skills to improve their descriptions or structure, or converting Claude Code sub-agents or slash commands to skills. This includes designing skill workflows, writing SKILL.md files, organizing supporting files with intention-revealing names, and leveraging CLI tools and appropriate scripting.
Expert at creating and modifying Claude Code slash commands. Auto-invokes when the user wants to create, update, modify, enhance, validate, or standardize slash commands, or when modifying command YAML frontmatter fields (especially 'model', 'allowed-tools', 'description'), needs help designing command workflows, or wants to understand command arguments and parameters. Also auto-invokes proactively when Claude is about to write command files (*/commands/*.md), or implement tasks that involve creating slash command components.
Create markdown indexes of GitHub repositories optimized for Claude project knowledge. Indexes enable retrieval of source content (.md, .qmd, .ipynb) via GitHub API without parsing rendered HTML/CSS/J
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LangGraph development for stateful multi-agent applications, cyclic workflows, conditional routing, human-in-the-loop patterns, and persistent state management. Use for complex AI orchestration, agent coordination, and production-grade agentic systems.
building-mcp-servers
Use when building MCP servers in TypeScript, Python, or C#; when implementing tools, resources, or prompts; when configuring Streamable HTTP transport; when migrating from SSE; when adding OAuth authentication; when seeing MCP protocol errors
Expert at creating and managing Claude Code plugins that bundle agents, skills, commands, and hooks into cohesive packages. Auto-invokes when the user wants to create, structure, validate, or publish a complete plugin, or needs help with plugin architecture and best practices. Also auto-invokes proactively when Claude is about to create plugin directory structures, write plugin.json manifests, or implement tasks that involve bundling components into a plugin package.
Expert at creating and modifying Claude Code skills. Auto-invokes when the user wants to create, update, modify, enhance, validate, or standardize skills, or when modifying skill YAML frontmatter fields (especially 'allowed-tools', 'description'), needs help designing skill architecture, or wants to understand when to use skills vs agents. Also auto-invokes proactively when Claude is about to write skill files (*/skills/*/SKILL.md), create skill directory structures, or implement tasks that involve creating skill components.
Use when building AI agents with Anthropic's Claude Agent SDK (formerly Claude Code SDK). Triggers include creating autonomous agents, building agentic applications, SDK-based automation, implementing hooks/subagents/MCP servers, session management, or agent tool usage. NOT when using Claude API directly (use anthropic-sdk) or building MCP servers from scratch (use mcp-builder).
Use when building AI agents with Google's Agent Development Kit (ADK). Triggers include creating ADK agents, Gemini-powered agents, multi-agent workflows, MCP integration with ADK, agent evaluation, workflow agents (Sequential/Parallel/Loop), Vertex AI deployment, or comparing OpenAI SDK with ADK. NOT when using other frameworks (OpenAI SDK, LangChain, CrewAI) or general LLM API calls.
Produce an LLM Build Pack (prompt+tool contract, data/eval plan, architecture+safety, launch checklist). Use for building with LLMs, GPT/Claude apps, prompt engineering, RAG, and tool-using agents.
Resource isolation strategies to prevent cascading failures and limit blast radius in distributed systems
Bundle size reduction strategies, icon optimization, tree-shaking, and performance analysis. Use when reducing bundle size or optimizing imports.
Reduce bundle size with splitting and compression.
Bundle and share code as gists or markdown. Use to create shareable code bundles, extract imports, and create GitHub gists.
How to create & maintain TypeDoc site documentation and the README for Bupkis
Business analysis skill for requirements gathering, market research, strategic analysis, and project brief creation. Use when users need to (1) Create comprehensive project briefs, (2) Conduct market or competitive analysis, (3) Facilitate brainstorming sessions, (4) Define problems and validate assumptions, (5) Elicit requirements through structured questioning, (6) Create user personas, or (7) Analyze project feasibility and scope
Expert in bridging the gap between business needs and technical solutions. Specializes in Requirements Engineering, BPMN, and Agile User Stories. Use when gathering requirements, creating user stories, modeling business processes, or translating business needs to technical specs.
Business process analysis, requirements documentation, and workflow optimization for retail, supply chain, and technology organizations
Perform comprehensive competitor analysis for any business. Produces an executive-summary markdown report with target customer profile, market positioning, pricing/business model, product features, funding/company size, SWOT analysis, and competitive matrix. All findings are data-grounded. Use when the user asks to analyze competitors, understand competitive landscape, compare a business to alternatives, or perform market research.
Master business documentation including BRD, FRD, specifications, and technical documentation for clear communication and requirements management.
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Expert in Japanese business communication covering keigo, email etiquette, meeting protocols, and corporate culture nuances
Implement business logic with ActiveInteraction and AASM state machines. Routes to specialized skills for typed operations and state management.
MBA-trained business strategist with full commercial awareness. USE WHEN user says 'business plan', 'financial analysis', 'P&L', 'cash flow', 'valuation', 'market analysis', 'competitive analysis', 'SWOT', 'business model', 'unit economics', 'fundraising', 'pitch deck', or needs strategic business guidance.
Beads Viewer - graph-aware triage engine for Beads issue tracker with 9 graph metrics (PageRank, betweenness, HITS, etc.), dependency-aware planning, and purpose-built robot protocol for AI agents.
Advanced memory and knowledge management workflows for Byterover MCP Server. Use when creating implementation reports with timelines, documenting features as PRDs, or syncing project documentation folders with automatic conflict resolution. Extends basic retrieve/store operations with structured workflows for documentation, analysis, and knowledge synthesis.
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c3-alter
Use when verifying C3 documentation quality - checks methodology compliance (layer rules, structure, diagrams) and implementation conformance (docs vs code drift)
Generate comprehensive C4 architecture documentation for an existing repository/codebase using a bottom-up analysis approach.
cache-clear
cache-metrics
Expert CAD Engineering Specialist with comprehensive knowledge of CAD
Expert skill for parametric 3D CAD model development with design intent and configuration management
caddy
Guidance for building and training with the Caffe deep learning framework on CIFAR-10 dataset. This skill applies when tasks involve compiling Caffe from source, training convolutional neural networks on image classification datasets, or working with legacy deep learning frameworks that have compatibility issues with modern systems.
Scans Cairo/StarkNet smart contracts for 6 critical vulnerabilities including felt252 arithmetic overflow, L1-L2 messaging issues, address conversion problems, and signature replay. Use when auditing StarkNet projects.
Use to enforce cadence rules, timezone coverage, and operational controls
Calendar event formatting, conflict detection, meeting optimization, and smart scheduling. Use when creating calendar events, finding meeting times, or managing schedules.
calendar-sync
Hard stop. Evidence-based calibration. Realign to North Star.
Practice wellness with Calm - track meditation and sleep sessions, view progress, and access content library
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Activate for marketing campaign planning, execution, and optimization. Use when launching campaigns, coordinating multi-channel efforts, managing budgets, or tracking campaign performance.
Gradually rolling out new versions to a subset of users, monitoring for issues, and expanding the rollout if everything looks healthy to minimize risk and enable fast rollback.
Evaluate GitHub contributors for MLOps/engineering roles. Use when analyzing candidates, researching GitHub profiles, or updating CONTRIBUTORS.md with hiring assessments.