auth-agent

auth-agent is a skill for Claude Code, Codex from ok-helloworld/vibe-pentest. It costs 109 tokens per session (6,248 once invoked), scanned A, original, AGPL-3.0.

A security-testing guide for checking login, account recovery, session, and identity-provider weaknesses. It covers areas such as OAuth, SAML, OIDC, CSRF, CAPTCHA bypasses, and user enumeration.

In plain words
What is it for?
It is for assessing login flows, password resets, session handling, CAPTCHA protections, and integrations with identity systems. It does not validate leaked JWTs, keys, or hard-coded credentials; api-agent handles those checks.
Why use it?
It helps find ways attackers might bypass authentication, guess or abuse accounts, or take over sessions. Password testing is performed only when the user has authorised it and the test conditions allow it.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing.

Good fit It is for assessing login flows, password resets, session handling, CAPTCHA protections, and integrations with identity systems. It does not validate leaked JWTs, keys, or hard-coded credentials; api-agent handles those checks.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/ok-helloworld/vibe-pentest/auth-agent
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 ok-helloworld/vibe-pentest --skill auth-agent
Clone the repo
git clone --depth 1 https://github.com/ok-helloworld/vibe-pentest

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 auth-agent

README.md
[![agentmods](https://agentmods.dev/badge/skills/ok-helloworld/vibe-pentest/auth-agent/github.svg)](https://agentmods.dev/skills/ok-helloworld/vibe-pentest/auth-agent)
Your own site
<a href="https://agentmods.dev/skills/ok-helloworld/vibe-pentest/auth-agent"><img src="https://agentmods.dev/badge/skills/ok-helloworld/vibe-pentest/auth-agent/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 auth-agent

Your own site · 80×15
<a href="https://agentmods.dev/skills/ok-helloworld/vibe-pentest/auth-agent"><img src="https://agentmods.dev/badge/skills/ok-helloworld/vibe-pentest/auth-agent.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 109 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 6,248 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 5.1 $0.00109 $0.06248
Opus 5.5 $0.00044 $0.02499
Sonnet 5.5 $0.00022 $0.01250
Haiku 4.5 $0.00011 $0.00625

Measured 1mo ago against content hash 6c16ed63821b, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

auth-agent scanned grade A with 0 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 1mo 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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

agents/auth-agent/SKILL.md · 280 lines

The source is not reproduced here

Licensed AGPL-3.0

The repository is licensed AGPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

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. 1mo ago Changed · +9 lines 6c16ed63821b
  2. 1mo ago Changed · -2 lines fea00a356bc4
  3. 2mo ago Changed · -1 lines 7a4effd3d4bb
  4. 2mo ago Changed 8f5a982a79e0
  5. 2mo ago First seen · 274 lines · 109 tokens per session scan A c279cf0aaead

Subscribe to this mod's changes

auth-agent is a skill published in the GitHub repository ok-helloworld/vibe-pentest (374 stars, last pushed 1mo ago), licensed AGPL-3.0. It adds 109 tokens to every session and 6,248 once invoked, about $0.0004 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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