everything_claudecode: Skill for Claude Code

.agents/skills/mcp-server-patterns/SKILL.md

mcp-server-patterns is a skill for Claude Code from SiniyaYousuf/everything_claudecode. It costs 44 tokens per session (880 once invoked), scanned A, a copy of mcp-server-patterns, MIT.

A guide to building MCP servers with the Node.js and TypeScript SDK. MCP is a standard that lets AI assistants call tools, read information, and use reusable prompts from your server.

In plain words
What is it for?
Use it when creating or maintaining MCP tools, read-only resources, prompts, transports, or Zod-based input validation.
Why use it?
It explains how to choose between local and remote connections and how to validate and register the server features an assistant can use.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: installed under .agents/ (shared by several agents).

This is SiniyaYousuf/everything_claudecode's own configuration. It tells Claude Code how to work on everything_claudecode itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything everything_claudecode configures →

Part of the everything-claude-code plugin — 29 skills, 29 commands shipped together

Reuse

Borrowing it

Nothing to install: this file belongs to SiniyaYousuf/everything_claudecode. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/SiniyaYousuf/everything_claudecode/main/.agents/skills/mcp-server-patterns/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/SiniyaYousuf/everything_claudecode

Made for: Claude Code.

Or install everything-claude-code, the plugin that ships this one along with the rest of its 29 skills, 29 commands.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for mcp-server-patterns

README.md
[![agentmods](https://agentmods.dev/badge/skills/siniyayousuf/everything_claudecode/mcp-server-patterns.svg)](https://agentmods.dev/skills/siniyayousuf/everything_claudecode/mcp-server-patterns)
Your own site
<a href="https://agentmods.dev/skills/siniyayousuf/everything_claudecode/mcp-server-patterns"><img src="https://agentmods.dev/badge/skills/siniyayousuf/everything_claudecode/mcp-server-patterns.svg" alt="Measured on agentmods" height="20"></a>
Per session 44 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 880 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 94% copy Near-identical to another mod in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00044 $0.00880
Opus 5 $0.00022 $0.00440
Sonnet 5 $0.00009 $0.00176
Haiku 4.5 $0.00004 $0.00088

Measured 6d ago against content hash 8da7edb0647f, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

mcp-server-patterns scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 6d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

This is a copy

94% identical to mcp-server-patterns — 3 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.agents/skills/mcp-server-patterns/SKILL.md · 68 lines

How it starts

The opening of the file, as written. The whole thing — 68 lines — stays where its author put it; the contents beside it link to each section on GitHub.

MCP Server Patterns

The Model Context Protocol (MCP) lets AI assistants call tools, read resources, and use prompts from your server. Use this skill when building or maintaining MCP servers. The SDK API evolves; check Context7 (query-docs for "MCP") or the official MCP documentation for current method names and signatures.

When to Use

Use when: implementing a new MCP server, adding tools or resources, choosing stdio vs HTTP, upgrading the SDK, or debugging MCP registration and transport issues.

How It Works

Core concepts

  • Tools: Actions the model can invoke (e.g. search, run a command). Register with registerTool() or tool() depending on SDK version.
  • Resources: Read-only data the model can fetch (e.g. file contents, API responses). Register with registerResource() or resource(). Handlers typically receive a uri argument.
  • Prompts: Reusable, parameterised prompt templates the client can surface (e.g. in Claude Desktop). Register with registerPrompt() or equivalent.
  • Transport: stdio for local clients (e.g. Claude Desktop); Streamable HTTP is preferred for remote (Cursor, cloud). Legacy HTTP/SSE is for backward compatibility.

The Node/TypeScript SDK may expose tool() / resource() or registerTool() / registerResource(); the official SDK has changed over time. Always verify against the current MCP docs or Context7.

Connecting with stdio

For local clients, create a stdio transport and pass it to your server’s connect method. The exact API varies by SDK version (e.g. constructor vs factory). See the official MCP documentation or query Context7 for "MCP stdio server" for the current pattern.

Keep server logic (tools + resources) independent of transport so you can plug in stdio or HTTP in the entrypoint.

Remote (Streamable HTTP)

For Cursor, cloud, or other remote clients, use Streamable HTTP (single MCP HTTP endpoint per current spec). Support legacy HTTP/SSE only when backward compatibility is required.

Read the full file on GitHub · 68 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 6d ago First seen · 68 lines · 44 tokens per session scan A 8da7edb0647f

Subscribe to this mod's changes

mcp-server-patterns is a skill published in the GitHub repository SiniyaYousuf/everything_claudecode (14 stars, last pushed 5mo ago), licensed MIT. It adds 44 tokens to every session and 880 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. It is 94% identical to mcp-server-patterns, differing in 3 lines, and is treated as a copy.

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