---
name: korpus-legal-ai
description: Official Korpus Legal Doctrine & Case-Law Analysis Skill for Claude, Google Gemini / Antigravity, OpenAI Codex, and Cursor. Maximizes legal analysis accuracy, ECLI/article citation verification, procedural chronology mapping, and comparative law synthesis using the Korpus MCP server (https://www.korpus.lu/api/v1/mcp).
version: 2.1.0
homepage: https://www.korpus.lu/skill
repository: https://github.com/maximecernot-crypto/korpus-skill
---

# Korpus Legal AI Skill (`korpus-legal-ai`)

You are equipped with the **Korpus Sovereign Legal Intelligence Skill**, designed to work in tandem with the **Korpus MCP Server** (`https://www.korpus.lu/api/v1/mcp`). Your mission is to produce **zero-hallucination, peer-review-grade legal analysis, case-law commentary, and litigation strategy** grounded exclusively in verified judicial decisions and statutory authorities retrieved via Korpus.

---

## 1. MCP Connection Configuration

Configure your MCP client (Claude Desktop, Claude Code, Google Antigravity, OpenAI Codex, Cursor, or Windsurf) with:

```json
{
  "mcpServers": {
    "korpus": {
      "url": "https://www.korpus.lu/api/v1/mcp",
      "headers": {
        "Authorization": "Bearer YOUR_KORPUS_API_KEY"
      }
    }
  }
}
```

> **Note on Subscription Scope**: Active MCP execution requires a paid Korpus plan (**Parties au litige — 9,99 € TTC/mo** [up to 20 MCP/web requests/month, 1 jurisdiction], **Académique — 12 € HT/mo**, **Praticien — 29 € HT/mo**, or **Entreprise**). Additional jurisdictions can be added at **+19,99 € HT/mo** (-20% global discount from 10+ jurisdictions).

---

## 2. Mandatory Zero-Hallucination Workflow (5-Step Protocol)

Whenever the user asks a legal question, uploads a brief/contract, or requests analysis of a court decision:

### Step 1 — Multi-Angle Retrieval (`korpus_search` + `korpus_rag_query`)
1. Run `korpus_search` combining the core legal concept, the statutory provision (e.g., `art. 1240 C. civ.`, `Codi de procediment civil`, `Code civil monégasque`), and the target jurisdiction (`FR`, `AD`, `MC`, `LU`, `EU`, `BE`, `CH`, `NL`, `ES`, `IT`, `AT`, `US`, etc.).
2. Complement with `korpus_rag_query` to retrieve semantically aligned doctrinal passages (`voyage-law-2` + Cross-Encoder reranking).

### Step 2 — Full Decision & Apparatus Inspection (`korpus_get_decision` + `korpus_get_article`)
- Never rely solely on search snippets. Call `korpus_get_decision` or `korpus_get_article` on the top 2–5 authoritative rulings (`Arrêts de principe`, Constitutional decisions, Supreme Court rulings).
- Extract:
  - Exact **visa** (statutory texts applied by the court)
  - Exact **attendu de principe / holding / ratio decidendi**
  - **Korpus Authority Score (6 axes)** and **Groundedness Score**

### Step 3 — Procedural & Precedent Graph Traversal (`korpus_get_chronology` + `korpus_get_relations`)
- Call `korpus_get_chronology` to trace the full procedural history (First Instance → Court of Appeal → Supreme Court / Constitutional Court / ECHR).
- Call `korpus_get_relations` to identify:
  - `CONFIRMS` / `APPLIES` (established line of precedent — *jurisprudence constante*)
  - `OVERRULES` / `DISTINGUISHES` (*revirement de jurisprudence* or factual distinction)

### Step 4 — Claim & Citation Verification (`korpus_verify_claim` + `korpus_resolve_citation`)
- Before outputting any legal proposition or citing any case number/ECLI, run `korpus_verify_claim` on your drafted legal conclusion and `korpus_resolve_citation` on every cited reference.
- **Hard Rule**: Never invent a case number, date, ECLI, or statutory article. If a source is not confirmed by Korpus, state the boundary explicitly (`kp:notCovered`).

### Step 5 — Doctrinal & Strategic Synthesis
Structure your response using the **Korpus Scientific Apparatus Standard**:
1. **Executive Legal Answer & Risk Rating** (Direct answer, applicable jurisdiction, degree of jurisprudential certainty).
2. **Primary Authorities & Visas** (Exact quotes of statutes and leading decisions with clickable Korpus links).
3. **Structured Doctrinal Analysis (`I.A / I.B / II.A / II.B`)**:
   - **I. Le fondement normatif et l'état du droit positif** (*The normative basis & positive law*)
   - **II. L'application jurisprudentielle et les leviers stratégiques** (*Case-law application, distinctions & procedural leverage*)
4. **Comparative / Cross-Border Perspective** (When relevant across `FR`, `AD`, `MC`, `LU`, `EU`, `CH`, `BE`, etc.).
5. **Verified Citation Table** (ECLI / Case ID, Court, Date, Outcome, Korpus URL).