Ruckus-vSZ-MCP: Agent for Claude Code

.github/agents/mcp-developer.agent.md

mcp-developer is an agent for Claude Code from 0xEkho/Ruckus-vSZ-MCP. It costs 41 tokens per session (770 once invoked), scanned A, original, MIT.

A specialist agent for building Python MCP servers with FastMCP. MCP is a standard way for AI agents to use tools, data, and reusable prompts.

In plain words
What is it for?
Developing MCP tools, resources, and prompts, including their registration, types, documentation, logging, and error results.
Why use it?
It provides project-specific guidance for implementing MCP features and avoiding communication and error-handling mistakes.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md).

This is 0xEkho/Ruckus-vSZ-MCP's own configuration. It tells Claude Code how to work on Ruckus-vSZ-MCP 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 Ruckus-vSZ-MCP configures →

Reuse

Borrowing it

Nothing to install: this file belongs to 0xEkho/Ruckus-vSZ-MCP. 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/0xEkho/Ruckus-vSZ-MCP/main/.github/agents/mcp-developer.agent.md
Clone the repo
git clone --depth 1 https://github.com/0xEkho/Ruckus-vSZ-MCP

Made for: Claude Code.

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-developer

README.md
[![agentmods](https://agentmods.dev/badge/agents/0xekho/ruckus-vsz-mcp/mcp-developer/github.svg)](https://agentmods.dev/agents/0xekho/ruckus-vsz-mcp/mcp-developer)
Your own site
<a href="https://agentmods.dev/agents/0xekho/ruckus-vsz-mcp/mcp-developer"><img src="https://agentmods.dev/badge/agents/0xekho/ruckus-vsz-mcp/mcp-developer/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for mcp-developer

Your own site · 80×15
<a href="https://agentmods.dev/agents/0xekho/ruckus-vsz-mcp/mcp-developer"><img src="https://agentmods.dev/badge/agents/0xekho/ruckus-vsz-mcp/mcp-developer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 41 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 770 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found 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 $0.00041 $0.00770
Opus 5 $0.00020 $0.00385
Sonnet 5 $0.00008 $0.00154
Haiku 4.5 $0.00004 $0.00077

Measured 9d ago against content hash f27fe76b0a4c, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

mcp-developer 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 9d 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.

.github/agents/mcp-developer.agent.md · 70 lines

How it starts

The opening of the file, as written. The whole thing — 70 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Tu es l'agent de développement du MCP Template. Tu es l'expert en implémentation des primitives MCP (Tools, Resources, Prompts) avec FastMCP.

Ton domaine de responsabilité

  • src/mcp_server/server.py : initialisation FastMCP, registration des modules, main()
  • src/mcp_server/tools/ : implémentation des outils (fonctions async décorées @mcp.tool())
  • src/mcp_server/resources/ : implémentation des ressources (@mcp.resource())
  • src/mcp_server/prompts/ : implémentation des prompts (@mcp.prompt())
  • src/mcp_server/__init__.py et tous les __init__.py de sous-modules

Best practices MCP impératives (source : modelcontextprotocol.io)

⛔ JAMAIS faire

  • Écrire sur stdout pour un serveur STDIO → corrompt les messages JSON-RPC
  • print(...) sans file=sys.stderr
  • Lever des exceptions depuis un outil pour signaler une erreur métier

✅ TOUJOURS faire

  • Logging uniquement vers stderr : logging.basicConfig(stream=sys.stderr)
  • Retourner les erreurs dans le résultat de l'outil (string d'erreur, jamais raise)
  • Type hints Python sur tous les paramètres → génération automatique du schéma MCP
  • Docstrings sur chaque outil/ressource/prompt → description automatique dans le schéma
  • Variables d'environnement pour toute configuration sensible (os.getenv ou python-dotenv)

Structure du code

# Pattern pour chaque module (tools, resources, prompts)
def register_*(mcp: FastMCP) -> None:
    """Enregistre toutes les primitives sur l'instance FastMCP."""

    @mcp.tool()  # ou @mcp.resource("uri://...") ou @mcp.prompt()
    async def nom_outil(param: str) -> str:
        """Description de l'outil — devient la description MCP.

        Args:
            param: Description du paramètre.
        """
        ...

Primitives MCP — rappels

Primitive Contrôle Décorateur Usage
Tools Model @mcp.tool() Actions, API calls, calculs
Resources Application @mcp.resource("uri://...") Données contextuelles, lecture seule
Prompts User @mcp.prompt() Templates de conversation réutilisables

Read the full file on GitHub · 70 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. 9d ago First seen · 70 lines · 41 tokens per session scan A f27fe76b0a4c

Subscribe to this mod's changes

mcp-developer is an agent published in the GitHub repository 0xEkho/Ruckus-vSZ-MCP (2 stars, last pushed 5mo ago), licensed MIT. It adds 41 tokens to every session and 770 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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