ctf-web

ctf-web is a skill for Claude Code, Codex from MateoBogo/CLEAVE. It costs 0 tokens per session (2,302 once invoked), scanned A, original, no licence file.

A web security testing skill for finding and explaining vulnerabilities in websites, APIs, authentication systems, and related technologies.

In plain words
What is it for?
Use it to test for issues such as SQL injection, cross-site scripting, request forgery, server-side request forgery, path traversal, and authentication flaws.
Why use it?
It helps developers investigate how attackers could exploit unsafe input handling, authentication, file uploads, requests, or parsers.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/mateobogo/cleave/ctf-web
Any agent
npx skills add MateoBogo/CLEAVE --skill ctf-web
Clone the repo
git clone --depth 1 https://github.com/MateoBogo/CLEAVE

Made for: Claude Code, Codex.

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 ctf-web

README.md
[![agentmods](https://agentmods.dev/badge/skills/mateobogo/cleave/ctf-web.svg)](https://agentmods.dev/skills/mateobogo/cleave/ctf-web)
Your own site
<a href="https://agentmods.dev/skills/mateobogo/cleave/ctf-web"><img src="https://agentmods.dev/badge/skills/mateobogo/cleave/ctf-web.svg" alt="Measured on agentmods" height="20"></a>
Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,302 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. Scan, not verified.
Origin unknown No closer match found 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 $0.00000 $0.02302
Opus 5 $0.00000 $0.01151
Sonnet 5 $0.00000 $0.00460
Haiku 4.5 $0.00000 $0.00230

Measured 4d ago against content hash 1e4a232eb1ca, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

ctf-web 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 4d 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

- [cves.md](cves.md) — Next.js middleware, urllib scheme, ExifTool DjVu, Ruby-SAML XPath, PaperCut
skills/ctf-web/SKILL.md · 87 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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. 4d ago First seen · 87 lines · 0 tokens per session scan A 1e4a232eb1ca

Subscribe to this mod's changes

ctf-web is a skill published in the GitHub repository MateoBogo/CLEAVE (4 stars, last pushed 3mo ago), with no licence file. It costs nothing until one of its globs matches a file; then it loads 2,302 tokens. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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