mcp-server-development SKILL.md skillA
This file is byte-identical to the first copy the registry indexed. Same content hash, so the same checks give both the same grade.
mcp-server-development from akiojin/llmlb is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add akiojin/llmlb/mcp-server-development@git:20251220.2c0f56ePins git:20251220.2c0f56e in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- akiojin/llmlb
- Path
.codex/skills/mcp-server-development/SKILL.md- Versions recorded
- 1
- Latest version
- git:20251220.2c0f56e, committed Dec 20, 2025
- Size
- 5,876 bytes
- Repository stars
- 10
- License
- MIT
Expert guidance for building MCP (Model Context Protocol) servers using the TypeScript SDK. Use when developing MCP servers, implementing tools/resources/prompts, or working with the @modelcontextprotocol/sdk package. Covers server initialization, request handlers, Zod schemas, error handling, and JSON-RPC patterns.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
This skill provides comprehensive guidance for building robust MCP servers, with specific focus on the unity-mcp-server architecture and patterns.
## Core Philosophy
MCP servers bridge AI assistants to external systems. They must be:
- **Reliable**: Handle errors gracefully, never crash unexpectedly
- **Discoverable**: Tools should have clear, self-documenting schemas
- **Performant**: Minimize latency, especially for stdio transport
- **Protocol-compliant**: Follow JSON-RPC 2.0 and MCP spec exactly
## Architecture Patterns
### Handler-Based Design
**ALWAYS** use a handler class per tool. Each handler encapsulates:
- Input validation (Zod schema)
- Business logic execution
- Error handling and response formatting
```javascript
// Pattern: One handler per tool
export class SystemPingToolHandler extends BaseToolHandler {
constructor(unityConnection) {
super({
name: 'system_ping',
description: 'Check Unity Editor connectivity',
inputSchema: { type: 'object', properties: {} }
});
this.unityConnection = unityConnection;
}
async execute(params) {
const result = await this.unityConnection.send({ command: 'ping' });
…Read the whole file at its exact version.
How to install
mdr add akiojin/llmlb/mcp-server-development@sha256:5864dcb3f259193fThe line at the top of this page pins the label git:20251220.2c0f56e, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_reolt6nycfq6bcrq)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Dec 20, 2025.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (5876 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
akiojin/llmlb · 10 stars · license MIT · pushed 2026-10-19 · branch develop
API
GET https://markdownregistry.com/api/v1/artifacts/art_reolt6nycfq6bcrq GET https://markdownregistry.com/api/v1/resolve?ref=akiojin/llmlb/mcp-server-development GET https://markdownregistry.com/api/v1/blob/5864dcb3f259193f3e80b70a415962d35ef71aa0bb7ce045d20a2b54130bd600
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.