MCP-Contracts Installation

Aktualisiert: 2025-12-31

Setup, Konfiguration und Registrierung des MCP-Contracts Servers.

Voraussetzungen

Installation

1. Verzeichnis erstellen

mkdir -p /var/www/mcp-servers/mcp_contracts
cd /var/www/mcp-servers/mcp_contracts

2. Virtual Environment

python3 -m venv venv
source venv/bin/activate
pip install mcp pymysql python-dotenv pyyaml

3. Struktur

/var/www/mcp-servers/mcp_contracts/
├── server.py
├── config.py
├── requirements.txt
├── venv/
├── domain/
│   ├── __init__.py
│   └── contracts.py
├── infrastructure/
│   ├── __init__.py
│   └── contract_repository.py
├── validators/
│   ├── __init__.py
│   ├── contract_validator.py
│   ├── rule_evaluator.py
│   └── scope_resolver.py
└── tools/
    ├── __init__.py
    └── contract_tools.py

4. Datenbank-Tabellen (ki_dev)

-- Contracts
CREATE TABLE IF NOT EXISTS contracts (
    id INT AUTO_INCREMENT PRIMARY KEY,
    uuid CHAR(36) NOT NULL,
    name VARCHAR(100) NOT NULL,
    version VARCHAR(20) NOT NULL,
    status ENUM('draft','active','deprecated') DEFAULT 'active',
    yaml_content TEXT NOT NULL,
    scope_description VARCHAR(500) DEFAULT NULL,
    created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
    created_by VARCHAR(100) DEFAULT 'system',
    updated_at DATETIME DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
    UNIQUE KEY uuid (uuid),
    UNIQUE KEY unique_name_version (name, version),
    INDEX idx_status (status),
    INDEX idx_name (name)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

-- History
CREATE TABLE IF NOT EXISTS contract_history (
    id INT AUTO_INCREMENT PRIMARY KEY,
    contract_id INT NOT NULL,
    previous_yaml TEXT DEFAULT NULL,
    previous_version VARCHAR(20) DEFAULT NULL,
    change_description TEXT DEFAULT NULL,
    changed_at DATETIME DEFAULT CURRENT_TIMESTAMP,
    changed_by VARCHAR(100) DEFAULT 'system',
    INDEX idx_contract_id (contract_id),
    FOREIGN KEY (contract_id) REFERENCES contracts(id) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

-- Validations
CREATE TABLE IF NOT EXISTS contract_validations (
    id INT AUTO_INCREMENT PRIMARY KEY,
    contract_id INT NOT NULL,
    validated_at DATETIME DEFAULT CURRENT_TIMESTAMP,
    result ENUM('passed','failed') NOT NULL,
    critical_count INT DEFAULT 0,
    major_count INT DEFAULT 0,
    minor_count INT DEFAULT 0,
    violations LONGTEXT CHECK (JSON_VALID(violations)),
    triggered_by ENUM('sync','manual','hook','mcp') DEFAULT 'mcp',
    target_path VARCHAR(255) DEFAULT NULL,
    duration_ms INT DEFAULT 0,
    INDEX idx_contract_id (contract_id),
    INDEX idx_validated_at (validated_at),
    INDEX idx_result (result),
    FOREIGN KEY (contract_id) REFERENCES contracts(id) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

Registrierung in Claude Code

# MCP-Server registrieren
claude mcp add mcp-contracts \
  --transport stdio \
  -- /var/www/mcp-servers/mcp_contracts/venv/bin/python \
     /var/www/mcp-servers/mcp_contracts/server.py

# Registrierung prüfen
claude mcp list

Test

# In Claude Code Session
contracts_list(compact=True)
contracts_statistics()

Fehlerbehebung

Server startet nicht

# Manuell testen
/var/www/mcp-servers/mcp_contracts/venv/bin/python \
  /var/www/mcp-servers/mcp_contracts/server.py

# Logs prüfen
tail -f ~/.claude/logs/mcp-*.log

Datenbankverbindung fehlgeschlagen

Tool nicht gefunden

# MCP-Server neu registrieren
claude mcp remove mcp-contracts
claude mcp add mcp-contracts ...

Berechtigungen

DB-UserDatenbankRechte
claude_codeki_devSELECT, INSERT, UPDATE, DELETE auf contracts*

Logging erfolgt in ki_dev.mcp_log.

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