cet-skill

cet-skill is a skill for Claude Code, Codex from mingchen666/Reviva. It costs 38 tokens per session (6,030 once invoked), scanned A, original, no licence file.

A CET-4 and CET-6 English exam preparation coach. CET-4 and CET-6 are standardised English tests commonly taken by students in China.

In plain words
What is it for?
Doing original practice, reviewing writing and translation, training reading and listening, receiving feedback, and planning study.
Why use it?
It provides structured practice and diagnosis so learners can identify weaknesses and improve specific skills.

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/mingchen666/reviva/cet-skill
Any agent
npx skills add mingchen666/Reviva --skill cet-skill
Clone the repo
git clone --depth 1 https://github.com/mingchen666/Reviva

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 cet-skill

README.md
[![agentmods](https://agentmods.dev/badge/skills/mingchen666/reviva/cet-skill.svg)](https://agentmods.dev/skills/mingchen666/reviva/cet-skill)
Your own site
<a href="https://agentmods.dev/skills/mingchen666/reviva/cet-skill"><img src="https://agentmods.dev/badge/skills/mingchen666/reviva/cet-skill.svg" alt="Measured on agentmods" height="20"></a>
Per session 38 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 6,030 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. 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 5.1 $0.00038 $0.06030
Opus 5 $0.00019 $0.03015
Sonnet 5 $0.00008 $0.01206
Haiku 4.5 $0.00004 $0.00603

Measured 6d ago against content hash 7cc9be864320, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, from the pricing page.

Security

Grade A, and why

cet-skill 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 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.

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.

electron/builtin-assets/skills/cet-skill/SKILL.md · 851 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. 6d ago First seen · 851 lines · 38 tokens per session scan A 7cc9be864320

Subscribe to this mod's changes

cet-skill is a skill published in the GitHub repository mingchen666/Reviva (219 stars, last pushed 9d ago), with no licence file. It adds 38 tokens to every session and 6,030 once invoked, about $0.0002 per session on Opus 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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