European-Parliament-MCP-Server: Skill for Claude Code

.github/skills/architecture-documentation/SKILL.md

architecture-documentation is a skill for Claude Code, Codex from Hack23/European-Parliament-MCP-Server. It costs 31 tokens per session (4,023 once invoked), scanned A, original, Apache-2.0.

A documentation guide for describing software structure, security boundaries, data flows, and planned changes with C4 diagrams and Mermaid charts.

In plain words
What is it for?
Use it to create architecture and security files, map systems and dependencies, record design decisions, and review how data moves through a project.
Why use it?
It turns complex architecture into consistent documents that developers and security reviewers can understand.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

This is Hack23/European-Parliament-MCP-Server's own configuration. It tells Claude Code and Codex how to work on European-Parliament-MCP-Server 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 European-Parliament-MCP-Server configures →

Needs its repository: it reads a path above its own folder, which exists only inside the repository. The line is **Evidence**: [.github/skills/gdpr-compliance/SKILL.md](../gdpr-compliance/SKILL.md).

Reuse

Borrowing it

Nothing to install: this file belongs to Hack23/European-Parliament-MCP-Server. 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/Hack23/European-Parliament-MCP-Server/main/.github/skills/architecture-documentation/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/Hack23/European-Parliament-MCP-Server

Made for: Claude Code, Codex.

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 architecture-documentation

README.md
[![agentmods](https://agentmods.dev/badge/skills/hack23/european-parliament-mcp-server/architecture-documentation/github.svg)](https://agentmods.dev/skills/hack23/european-parliament-mcp-server/architecture-documentation)
Your own site
<a href="https://agentmods.dev/skills/hack23/european-parliament-mcp-server/architecture-documentation"><img src="https://agentmods.dev/badge/skills/hack23/european-parliament-mcp-server/architecture-documentation/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 architecture-documentation

Your own site · 80×15
<a href="https://agentmods.dev/skills/hack23/european-parliament-mcp-server/architecture-documentation"><img src="https://agentmods.dev/badge/skills/hack23/european-parliament-mcp-server/architecture-documentation.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 31 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,023 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. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 2 findings, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • medium Data Exfiltration · line 99
    Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.
    Fix: Verify the destination URL is trusted and necessary. Remove or replace with documented APIs. Ensure no secrets, tokens, or PII are transmitted.
  • medium Agent Snooping · line 206
    Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.
    Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
How audits are shown
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 $0.00031 $0.04023
Opus 5 $0.00015 $0.02011
Sonnet 5 $0.00006 $0.00805
Haiku 4.5 $0.00003 $0.00402

Measured 11d ago against content hash c926899b82d3, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

architecture-documentation 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 11d 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/skills/architecture-documentation/SKILL.md · 456 lines

How it starts

The opening of the file, as written. The whole thing — 456 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Architecture Documentation Skill

Context

This skill applies when:

  • Creating SECURITY_ARCHITECTURE.md for new repositories
  • Documenting system architecture using C4 model
  • Creating Mermaid diagrams for security architecture
  • Planning future security architecture (FUTURE_SECURITY_ARCHITECTURE.md)
  • Documenting data flows and trust boundaries
  • Creating architecture decision records (ADRs)
  • Conducting architecture reviews

This skill enforces Hack23 Secure Development Policy Section 🏗️ requirements for comprehensive architecture documentation.

Rules

1. C4 Architecture Model (Policy Section 📐)

  1. Level 1 - Context: System context with external dependencies
  2. Level 2 - Container: Applications, data stores, microservices
  3. Level 3 - Component: Internal components within containers
  4. Level 4 - Code: Implementation details (optional, for critical security)

2. Required Documentation Files (Policy Section 🏗️)

  1. SECURITY_ARCHITECTURE.md: Current security architecture
  2. FUTURE_SECURITY_ARCHITECTURE.md: Planned security improvements
  3. ARCHITECTURE.md: General system architecture
  4. DATA_FLOW.md: Data flow diagrams with classifications
  5. DEPLOYMENT.md: Deployment architecture and infrastructure

3. Mandatory Security Architecture Content (Policy Section 🏗️.3)

  1. Authentication & Authorization: Auth mechanisms and identity management
  2. Data Protection: Encryption, data classification, GDPR compliance
  3. Network Security: Network topology, VPCs, security groups
  4. Audit & Logging: Logging strategy, audit trails, SIEM integration
  5. Threat Model Integration: Links to threat model documentation
  6. Compliance Mapping: ISO 27001, NIST CSF, CIS Controls mapping

4. Mermaid Diagram Standards (Policy Section 🏗️)

  1. Color Coding: Red (untrusted), Green (trusted), Yellow (external), Blue (data)
  2. Trust Boundaries: Clearly marked trust boundaries
  3. Data Flow: Direction and data classification labels
  4. Security Controls: Security controls annotated on diagram
  5. Legend: Always include legend explaining symbols

Read the full file on GitHub · 456 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. 11d ago First seen · 456 lines · 31 tokens per session scan A c926899b82d3

Subscribe to this mod's changes

architecture-documentation is a skill published in the GitHub repository Hack23/European-Parliament-MCP-Server (28 stars, last pushed yesterday), licensed Apache-2.0. It adds 31 tokens to every session and 4,023 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 2026-08-30.

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