V3 Security Overhaul

V3 Security Overhaul is a skill for Claude Code from mandelbro/awesome-claude-hooks. It costs 52 tokens per session (592 once invoked), scanned A, a copy of V3 Security Overhaul, Apache-2.0.

A security overhaul plan for claude-flow v3 that addresses listed vulnerabilities and applies safer defaults for dependencies, passwords, credentials, and input validation.

In plain words
What is it for?
Use it to review the threat model, update vulnerable dependencies, strengthen password handling, remove hardcoded credentials, and validate inputs.
Why use it?
It reduces known security weaknesses and gives security work a defined process for design, remediation, and testing.

Skill for Claude Code

Written for Claude Code: installed under .claude/.

Good fit Use it to review the threat model, update vulnerable dependencies, strengthen password handling, remove hardcoded credentials, and validate inputs.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/mandelbro/awesome-claude-hooks/v3-security-overhaul
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add mandelbro/awesome-claude-hooks --skill v3-security-overhaul
Clone the repo
git clone --depth 1 https://github.com/mandelbro/awesome-claude-hooks

Made for: Claude Code.

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 V3 Security Overhaul

README.md
[![agentmods](https://agentmods.dev/badge/skills/mandelbro/awesome-claude-hooks/v3-security-overhaul/github.svg)](https://agentmods.dev/skills/mandelbro/awesome-claude-hooks/v3-security-overhaul)
Your own site
<a href="https://agentmods.dev/skills/mandelbro/awesome-claude-hooks/v3-security-overhaul"><img src="https://agentmods.dev/badge/skills/mandelbro/awesome-claude-hooks/v3-security-overhaul/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 V3 Security Overhaul

Your own site · 80×15
<a href="https://agentmods.dev/skills/mandelbro/awesome-claude-hooks/v3-security-overhaul"><img src="https://agentmods.dev/badge/skills/mandelbro/awesome-claude-hooks/v3-security-overhaul.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 52 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 592 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin 100% copy Near-identical to another mod 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 $0.00052 $0.00592
Opus 5 $0.00026 $0.00296
Sonnet 5 $0.00010 $0.00118
Haiku 4.5 $0.00005 $0.00059

Measured 7d ago against content hash 4123b78d5a2d, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

V3 Security Overhaul scanned grade A with 1 finding 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 7d 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.

Runs shell commandslowCapability

Expected in a hook, worth knowing in a rule or an instructions file.

import { execFile } from 'child_process';
Origin

This is a copy

100% identical to V3 Security Overhaul — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.claude/skills/v3-security-overhaul/SKILL.md · 82 lines

What it actually says

V3 Security Overhaul

What This Skill Does

Orchestrates comprehensive security overhaul for claude-flow v3, addressing critical vulnerabilities and establishing security-first development practices using specialized v3 security agents.

Quick Start

# Initialize V3 security domain (parallel)
Task("Security architecture", "Design v3 threat model and security boundaries", "v3-security-architect")
Task("CVE remediation", "Fix CVE-1, CVE-2, CVE-3 critical vulnerabilities", "security-auditor")
Task("Security testing", "Implement TDD London School security framework", "test-architect")

Critical Security Fixes

CVE-1: Vulnerable Dependencies

npm update @anthropic-ai/claude-code@^2.0.31
npm audit --audit-level high

CVE-2: Weak Password Hashing

// ❌ Old: SHA-256 with hardcoded salt
const hash = crypto.createHash('sha256').update(password + salt).digest('hex');

// ✅ New: bcrypt with 12 rounds
import bcrypt from 'bcrypt';
const hash = await bcrypt.hash(password, 12);

CVE-3: Hardcoded Credentials

// ✅ Generate secure random credentials
const apiKey = crypto.randomBytes(32).toString('hex');

Security Patterns

Input Validation (Zod)

import { z } from 'zod';

const TaskSchema = z.object({
  taskId: z.string().uuid(),
  content: z.string().max(10000),
  agentType: z.enum(['security', 'core', 'integration'])
});

Path Sanitization

function securePath(userPath: string, allowedPrefix: string): string {
  const resolved = path.resolve(allowedPrefix, userPath);
  if (!resolved.startsWith(path.resolve(allowedPrefix))) {
    throw new SecurityError('Path traversal detected');
  }
  return resolved;
}

Safe Command Execution

import { execFile } from 'child_process';

// ✅ Safe: No shell interpretation
const { stdout } = await execFile('git', [userInput], { shell: false });

Success Metrics

  • Security Score: 90/100 (npm audit + custom scans)
  • CVE Resolution: 100% of critical vulnerabilities fixed
  • Test Coverage: >95% security-critical code
  • Implementation: All secure patterns documented and tested
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. 7d ago First seen · 82 lines · 52 tokens per session scan A 4123b78d5a2d

Subscribe to this mod's changes

V3 Security Overhaul is a skill published in the GitHub repository mandelbro/awesome-claude-hooks (1 stars, last pushed 5mo ago), licensed Apache-2.0. It adds 52 tokens to every session and 592 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 1 finding (runs shell commands). It is 100% identical to V3 Security Overhaul, differing in 0 lines, and is treated as a copy.

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