alethia

alethia is a skill for Claude Code from vitron-ai/alethia-mcp. It costs 146 tokens per session (2,596 once invoked), scanned B, original, no licence file.

A skill for driving a real web browser using plain-English instructions through Alethia, a testing runtime. It supports browser testing and mentions accessibility and security audits.

In plain words
What is it for?
Use it to smoke-test pages, check accessibility against WCAG, run security audits against NIST SP 800-53, test the EA1 safety gate, and start coverage on an unknown page.
Why use it?
It removes the need to manually perform every browser check when testing an unfamiliar or local application.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the alethia plugin — 1 skill, 6 commands, 1 MCP server shipped together

Good fit Use it to smoke-test pages, check accessibility against WCAG, run security audits against NIST SP 800-53, test the EA1 safety gate, and start coverage on an unknown page.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/vitron-ai/alethia-mcp/alethia
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 vitron-ai/alethia-mcp --skill alethia
Clone the repo
git clone --depth 1 https://github.com/vitron-ai/alethia-mcp

Made for: Claude Code.

Or install alethia, the plugin that ships this one along with the rest of its 1 skill, 6 commands, 1 MCP server.

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 alethia

README.md
[![agentmods](https://agentmods.dev/badge/skills/vitron-ai/alethia-mcp/alethia/github.svg)](https://agentmods.dev/skills/vitron-ai/alethia-mcp/alethia)
Your own site
<a href="https://agentmods.dev/skills/vitron-ai/alethia-mcp/alethia"><img src="https://agentmods.dev/badge/skills/vitron-ai/alethia-mcp/alethia/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 alethia

Your own site · 80×15
<a href="https://agentmods.dev/skills/vitron-ai/alethia-mcp/alethia"><img src="https://agentmods.dev/badge/skills/vitron-ai/alethia-mcp/alethia.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 146 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,596 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 1 finding. 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00146 $0.02596
Opus 5 $0.00073 $0.01298
Sonnet 5 $0.00029 $0.00519
Haiku 4.5 $0.00015 $0.00260

Measured 11d ago against content hash 37366e55340b, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade B, and why

alethia scanned grade B 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 11d 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.

Recursive force deletemediumDestructive command

rm -rf with a variable or a broad path is one typo away from removing the wrong tree.

rm -rf ~/.npm/_npx

Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.

skills/alethia/SKILL.md · 217 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.

  1. 11d ago First seen · 217 lines · 146 tokens per session scan B 37366e55340b

Subscribe to this mod's changes

alethia is a skill published in the GitHub repository vitron-ai/alethia-mcp (1 stars, last pushed 23d ago), with no licence file. It adds 146 tokens to every session and 2,596 once invoked, about $0.0007 per session on Opus 5. A static security scan graded it B with 1 finding (recursive force delete). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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