customgpt-claude-quadruple-verification

CustomGPT Quadruple Verification for Claude Code

Catch security bugs, placeholder code, and hallucinated claims in AI-generated code — before it ships.

Built by CustomGPT.ai for production teams running Claude Code at scale.

The Problem

41% of all new code committed in 2026 is AI-generated — and 58% of it contains security vulnerabilities. Every existing tool (SonarQube, Snyk, Semgrep, CodeRabbit) works after the code is written — at CI, PR review, or repo scan. Nothing catches issues at the moment of generation.

Quadruple Verification intercepts Claude Code operations in real time, before code hits the filesystem. Regex fast-gates block obvious violations in <50ms. An AI self-review layer catches subtle issues across quality, security, research accuracy, and completeness.

What It Does

Four verification cycles run automatically on every Claude Code operation:

Cycle	When	What
Cycle 1 — Code Quality	Before file write/edit	Regex gate blocks TODO, placeholder, stub, and incomplete code
Cycle 2 — Security	Before write/edit/bash/MCP	Regex gate blocks eval(), hardcoded secrets, SQL injection, XSS, destructive commands
Cycle 3 — Output Quality	Before Claude finishes	AI multi-section review: code quality, security, research claims, completeness
Cycle 4 — Research Claims	Before write/edit of research .md	Blocks vague language, unverified stats, missing source URLs
Audit Trail	After every operation	Full JSONL audit log + optional LLM advisory analysis

Quick Start

Requirements

• Node.js >= 18
• Claude Code CLI

Option 1: Marketplace (Recommended)

Two commands inside Claude Code — includes auto-updates:

/plugin marketplace add kirollosatef/customgpt-claude-quadruple-verification
/plugin install customgpt-claude-quadruple-verification@kirollosatef-customgpt-claude-quadruple-verification

That's it. The plugin auto-updates every session.

Option 2: npx

Run from any terminal:

npx @customgpt/claude-quadruple-verification

Option 3: Manual Install

Windows (PowerShell):

git clone https://github.com/kirollosatef/customgpt-claude-quadruple-verification.git
cd customgpt-claude-quadruple-verification
.\install\install.ps1

macOS / Linux:

git clone https://github.com/kirollosatef/customgpt-claude-quadruple-verification.git
cd customgpt-claude-quadruple-verification
bash install/install.sh

Verify Installation

node install/verify.mjs

Test It

1. Start Claude Code in any project
2. Ask: "Create a Python file with a TODO comment"
3. The operation should be BLOCKED with an explanation
4. Check audit logs in .claude/quadruple-verify-audit/

Team Setup

To auto-prompt all team members to install the plugin, commit this file to each repo:

.claude/settings.json

{
  "plugins": [
    "kirollosatef/customgpt-claude-quadruple-verification"
  ]
}

When anyone opens the project in Claude Code, they'll be prompted to install the plugin. See docs/team-setup/settings.json for the template.

Auto-Updates

• Marketplace installs auto-update every session — push to the repo and everyone gets it.
• npx installs get the latest version each time npx runs.
• Manual installs require git pull to update.

How It Works

The plugin uses Claude Code's hook system to intercept operations at three points: