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Use when building MCP servers, designing tools and resources, or implementing Model Context Protocol standards.
Codex または Claude でインストール この Prompt をコピーして Codex、Claude、または他のアシスタントに貼り付けると、Skill ページを確認してインストールできます。
SOC 職業分類に基づく
| name | mcp-builder |
| description | Use when building MCP servers, designing tools and resources, or implementing Model Context Protocol standards. |
| allowed-tools | Read, Write, Edit, Glob, Grep |
Principles for building MCP servers.
Model Context Protocol - standard for connecting AI systems with external tools and data sources.
| Concept | Purpose |
|---|---|
| Tools | Functions AI can call |
| Resources | Data AI can read |
| Prompts | Pre-defined prompt templates |
my-mcp-server/
├── src/
│ └── index.ts # Main entry
├── package.json
└── tsconfig.json
| Type | Use |
|---|---|
| Stdio | Local, CLI-based |
| SSE | Web-based, streaming |
| WebSocket | Real-time, bidirectional |
| Principle | Description |
|---|---|
| Clear name | Action-oriented (get_weather, create_user) |
| Single purpose | One thing well |
| Validated input | Schema with types and descriptions |
| Structured output | Predictable response format |
| Field | Required? |
|---|---|
| Type | Yes - object |
| Properties | Define each param |
| Required | List mandatory params |
| Description | Human-readable |
| Type | Use |
|---|---|
| Static | Fixed data (config, docs) |
| Dynamic | Generated on request |
| Template | URI with parameters |
| Pattern | Example |
|---|---|
| Fixed | docs://readme |
| Parameterized | users://{userId} |
| Collection | files://project/* |
| Situation | Response |
|---|---|
| Invalid params | Validation error message |
| Not found | Clear "not found" |
| Server error | Generic error, log details |
| Type | Encoding |
|---|---|
| Text | Plain text |
| Images | Base64 + MIME type |
| Files | Base64 + MIME type |
| Field | Purpose |
|---|---|
| command | Executable to run |
| args | Command arguments |
| env | Environment variables |
| Type | Focus |
|---|---|
| Unit | Tool logic |
| Integration | Full server |
| Contract | Schema validation |
Remember: MCP tools should be simple, focused, and well-documented. The AI relies on descriptions to use them correctly.
Activates the "Chameleon" persona for working in existing codebases shared with human teammates. Absorbs the codebase's established style and patterns before writing code. Issues explicit warnings when mimicking sub-optimal patterns. Use when the user says "hackathon", "team project", "internship", "other people's code", "brownfield", or asks to "match the existing style."
Structured task planning with clear breakdowns, dependencies, and verification criteria. Use when implementing features, refactoring, or any multi-step work.
Activates the Kairou Persona (The Architect) to create implementation plans, project specifications, and architectural blueprints. Use when the user asks to "plan", "roadmap", or "architect" a solution.
Create Excalidraw diagram JSON files that make visual arguments. Use when the user wants to visualize workflows, architectures, or concepts.
Use when designing APIs, selecting between REST/GraphQL/tRPC, determining response formats, versioning strategies, or pagination.
Use when creating full-stack applications from scratch, determining project types, selecting tech stacks, or coordinating multiple agents for complex builds.