An agent mode for skeptical quality checking and adversarial analysis. It looks for weaknesses rather than assuming that a result is correct.

Use it to review implementations, plans, or other work for quality problems.

It helps uncover errors, omissions, and fragile assumptions before work is accepted.

How fabioc-aloha/Alex_Plug_In configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to fabioc-aloha/Alex_Plug_In. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/fabioc-aloha/Alex_Plug_In/main/.github/agents/alex-validator.agent.md

Clone the repo

git clone --depth 1 https://github.com/fabioc-aloha/Alex_Plug_In

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.

README.md

[![agentmods](https://agentmods.dev/badge/agents/fabioc-aloha/alex_plug_in/alex-validator/github.svg)](https://agentmods.dev/agents/fabioc-aloha/alex_plug_in/alex-validator)

Your own site

<a href="https://agentmods.dev/agents/fabioc-aloha/alex_plug_in/alex-validator"><img src="https://agentmods.dev/badge/agents/fabioc-aloha/alex_plug_in/alex-validator/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.

Your own site · 80×15

<a href="https://agentmods.dev/agents/fabioc-aloha/alex_plug_in/alex-validator"><img src="https://agentmods.dev/badge/agents/fabioc-aloha/alex_plug_in/alex-validator.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 14 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 1,704 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.

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.

Model	Per session	Once invoked
Fable 5.1	$0.00014	$0.01704
Opus 5.5	$0.00006	$0.00682
Sonnet 5.5	$0.00003	$0.00341
Haiku 4.5	$0.00001	$0.00170

Measured 2mo ago against content hash 0dff95821602, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

Validator 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 2mo 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.

.github/agents/alex-validator.agent.md · 242 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

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.

2mo ago First seen · 242 lines · 14 tokens per session scan A 0dff95821602

Subscribe to this mod's changes

Validator is an agent published in the GitHub repository fabioc-aloha/Alex_Plug_In (4 stars, last pushed 6mo ago), with no licence file. It adds 14 tokens to every session and 1,704 once invoked, about $0.0001 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 2026-08-31.

Debugging Testing ai ai-agent ai-assistant azure azure-ai bootstrap-learning

Validator next to 6 agents from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
Validatorfabioc-aloha/Alex_Plug_In	Agent	4	6mo ago	none	A	14	Claude Code
refactor-cleanersangrokjung/claude-forge	Agent	873	2mo ago	MIT	A	109	Claude Code
keystonesliamh11/Deus	Agent	51	2d ago	MIT	A	87	Claude Code
code-explorersliamh11/Deus	Agent	51	2d ago	MIT	A	57	Claude Code
FAI Collective Debuggerfrootai/frootai	Agent	7	4d ago	MIT	A	36	Claude Code
scoutduthaho/claudekit	Agent	97	3mo ago	MIT	A	148	Claude Code
react19-auditorarchubbuck/workspace-architect	Agent	19	2d ago	ISC	A	61	Claude Code

Alex_Plug_In: Agent for Claude Code