EU AI Act System Classifier — Deployment Guide

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See CHANGELOG.md for version history.

Overview

EU AI Act System Classifier — a structured AI Act assessment skill for Claude that provides:

Art. 2 scope-exclusion analysis (military, personal use, pure R&D, pre-market, international law enforcement) with system-description-informed targeting
Art. 3(1) AI system definition test — 7-criteria analysis grounded in Commission guidelines and the OECD AI framework
Open-source exemption checklists — dedicated paths for Art. 2(12) (AI systems) and Art. 53(2) (GPAI models)
Art. 5 prohibited-practice screening with subject-centric reading per Commission Guidelines
High-risk classification — Annex I product safety route + Annex III application-based route
Art. 6(3) exception assessment with Art. 6(4) documentation requirements
GPAI model assessment running in parallel with risk-tier classification — standard GPAI (Art. 53) and systemic-risk GPAI (Art. 55)
Art. 50 transparency-obligation triggers with Code of Practice multi-layered marking guidance
Sector-specific guidance for high-risk Annex III categories (employment, education, biometrics, law enforcement, etc.)
Compliance deadline lookup by risk tier and provider/deployer role
Classification Dashboard output — single-page summary with legal basis, deadlines, and follow-up actions

File Structure

ai-act-classifier/
├── SKILL.md                              # Main skill instructions (deploy this)
├── CHANGELOG.md                          # Version history
├── evals/
│   └── evals.json                        # 3 test cases (with-skill vs. baseline)
└── references/
    ├── ai-system-definition.md           # Art. 3(1) 7-criteria test + worked examples
    ├── scope-exclusions.md               # Art. 2 exclusion checklists (incl. open-source)
    ├── prohibited-practices.md           # Art. 5 prohibitions — full subject-centric analysis
    ├── high-risk-annexes.md              # Annex I + Annex III routes
    ├── art6-exception.md                 # Art. 6(3) exception with Art. 6(4) docs
    ├── gpai-systemic-risk.md             # Art. 51/53/55 GPAI thresholds and obligations
    ├── art50-transparency.md             # Art. 50 transparency + Code of Practice marking
    ├── sector-guidance.md                # Sector-specific high-risk guidance
    ├── jurisdiction-requirements.md      # Member-state-specific implementation notes
    ├── compliance-deadlines.md           # Deadlines by tier + role
    ├── enforcement-framework.md          # Penalties, market surveillance, AI Office
    └── case-studies.md                   # Worked classification examples

Deployment

Claude.ai (User Skills)

Go to Settings → Profile → Custom Skills (or equivalent)
Upload the entire ai-act-classifier/ folder structure
The skill will auto-trigger when you mention AI Act classification, risk tiers, KI-Verordnung, Annex III, prohibited practices, or GPAI systemic risk

Claude Code / Custom MCP Setup

Copy the ai-act-classifier/ folder to your skills directory:

cp -r ai-act-classifier/ /path/to/your/skills/user/ai-act-classifier/

Ensure the skill is registered in your configuration

Usage

Quick Start

Describe the AI technology you want to classify:

> "We're building a CV-screening tool that ranks job applicants for our HR team.
> It uses a fine-tuned LLM to score candidates against job descriptions. Do we
> need to treat this as high-risk under the AI Act?"

The skill will activate and walk you through the classification.

Trigger Phrases

"Classify an AI system under the AI Act" / "AI Act risk tier"
"Is this an AI system?" / "Art. 3(1)" / "Prohibited practice?"
"High-risk classification" / "Annex III" / "Art. 6 exception"
"GPAI systemic risk" / "KI-Verordnung" / "Risikoklassifizierung"

> For a pure article-lookup question without producing a classification, answer
> it directly from the cited regulation text rather than running the classifier.

Workflow

Phase	Description
Phase 1: Scope Gate	Art. 2 exclusion analysis (military, personal, R&D, pre-market, ILE) + open-source checklist (Art. 2(12) / Art. 53(2))
Phase 2: AI System Test	Art. 3(1) 7-criteria definition test grounded in Commission guidelines and OECD framework
Phase 3: Risk Classification	Steps 1–3 in sequence (Art. 5 → Annex I → Annex III + Art. 6(3) exception); Step 4 GPAI assessment runs in parallel; Step 5 Art. 50 transparency check
Phase 4: Classification Dashboard	Single-page output: risk tier, legal basis, deadlines, obligations summary, next-step recommendations

Capabilities Summary

Feature	Description
Scope Exclusion (Art. 2)	System-description-informed targeting — only relevant exclusions surfaced
Open-Source Checklist	Dedicated 3-step process for Art. 2(12) AI systems and Art. 53(2) GPAI models
AI System Definition	7-criteria Art. 3(1) test with Commission/OECD guidance
Prohibited Practices	Art. 5 screening — subject-centric reading per Commission Guidelines
High-Risk: Annex I	Product-safety route (Art. 6(1))
High-Risk: Annex III	Application-based route (Art. 6(2)) with Art. 6(3) exception
Art. 6(3) Exception	Documented carve-out with Art. 6(4) registration obligations
GPAI Assessment	Parallel track — standard GPAI (Art. 53) + systemic-risk GPAI (Art. 55)
Art. 50 Transparency	Interaction, synthetic content, emotion recognition, deepfake labeling
Sector Guidance	Targeted guidance for Annex III categories (employment, education, biometrics, etc.)
Jurisdiction Notes	Member-state-specific implementation requirements
Deadline Lookup	Compliance dates by tier (prohibited / high-risk / GPAI / Art. 50 / minimal)
Classification Dashboard	Single-page summary output

Regulatory Basis

Document	Reference
EU AI Act	Regulation (EU) 2024/1689
Commission Guidelines on AI System Definition	Art. 3(1) interpretation
Commission Guidelines on Prohibited AI Practices	Art. 5 enforcement reading
Commission Guidelines on High-Risk Classification	Art. 6 + Annex III
OECD AI Framework	Underlying technical definition
GPAI Code of Practice	Art. 53/55 implementation
Art. 50 Code of Practice (Transparency)	Multi-layered marking framework

License & Disclaimer

This skill provides structured guidance based on the EU AI Act (Regulation (EU) 2024/1689), Commission guidelines, and the OECD AI framework. It does not constitute legal advice. Final classification decisions should involve qualified legal counsel with AI Act expertise.

Licensed under AGPL-3.0.

> Quality assurance: this skill ships with evaluation tests in the evals/ folder, which I run to check its outputs against expected results.

Created by Oliver Schmidt-Prietz — OneZero Legal