meta-skill-tester

meta-skill-tester is a skill for Claude Code from modu-ai/moai-cowork. It costs 191 tokens per session (3,968 once invoked), scanned A, original, Apache-2.0.

A testing tool for checking the quality of coding-agent skills. It compares results with and without a skill, runs regression and chain tests, measures usage and time, and produces a scored report.

In plain words
What is it for?
Use it to run A/B tests, regression tests, chain tests, rubric scoring, and comparisons of output quality, accuracy, completeness, token use, and time.
Why use it?
It reveals whether a skill actually improves results and whether later edits cause regressions. A baseline is the comparison result produced without the skill.

Skill for Claude Code

Written for Claude Code: user-invocable in frontmatter. Also seen: mentions Claude Code.

Part of the moai-coworker plugin — 32 skills shipped together

Good fit Use it to run A/B tests, regression tests, chain tests, rubric scoring, and comparisons of output quality, accuracy, completeness, token use, and time.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/modu-ai/moai-cowork/meta-skill-tester
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 modu-ai/moai-cowork --skill meta-skill-tester
Clone the repo
git clone --depth 1 https://github.com/modu-ai/moai-cowork

Made for: Claude Code.

Or install moai-coworker, the plugin that ships this one along with the rest of its 32 skills.

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 meta-skill-tester

README.md
[![agentmods](https://agentmods.dev/badge/skills/modu-ai/moai-cowork/meta-skill-tester/github.svg)](https://agentmods.dev/skills/modu-ai/moai-cowork/meta-skill-tester)
Your own site
<a href="https://agentmods.dev/skills/modu-ai/moai-cowork/meta-skill-tester"><img src="https://agentmods.dev/badge/skills/modu-ai/moai-cowork/meta-skill-tester/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 meta-skill-tester

Your own site · 80×15
<a href="https://agentmods.dev/skills/modu-ai/moai-cowork/meta-skill-tester"><img src="https://agentmods.dev/badge/skills/modu-ai/moai-cowork/meta-skill-tester.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 191 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,968 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 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 $0.00191 $0.03968
Opus 5 $0.00096 $0.01984
Sonnet 5 $0.00038 $0.00794
Haiku 4.5 $0.00019 $0.00397

Measured 7d ago against content hash 3dd98e7a518f, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

meta-skill-tester 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 7d 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.

plugins/moai-coworker/skills/meta-skill-tester/SKILL.md · 386 lines

How it starts

The opening of the file, as written. The whole thing — 386 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Skill Tester — 스킬 품질 검증 도구 (루브릭 + 체인 내장)

moai-coworker | revfactory/harness 테스트 방법론 기반 single source of truth for: 4차원 스코어링 루브릭, 스킬 체인 검증 프로토콜

개요

meta-skill-builder로 생성된 스킬 또는 기존 스킬의 품질을 검증합니다. harness의 A/B 테스트 방법론을 구현하여 baseline(스킬 없음)과 with-skill(스킬 사용)을 비교하며, 4차원 스코어링 루브릭체인 검증 프로토콜을 본문에 직접 포함하여 별도 rules 파일 참조 없이 단독으로 동작합니다.

트리거 키워드

스킬 테스트 검증 A/B 테스트 baseline 회귀 테스트 체인 테스트 meta-skill-tester 품질 측정 루브릭 스코어링 4차원 평가

워크플로우

1. [로드]    → 대상 스킬의 tests/test-cases.yaml 로드
2. [선택]    → 테스트 모드 선택 (A/B | 회귀 | 체인 | 루브릭 단독)
3. [실행]    → 테스트 프롬프트를 Claude Code에 실행
4. [측정]    → 토큰 사용량, 출력 품질, 시간 측정
5. [스코어]  → 4차원 루브릭 가중 평균 산출
6. [비교]    → baseline vs with-skill 결과 비교
7. [보고]    → 스코어 리포트 생성

실행 규칙

테스트 모드

Mode 1: A/B 테스트 (신규 스킬 검증)

meta-skill-builder Phase 5에서 사용하는 기본 모드입니다.

절차:

  1. Baseline 실행: 스킬 없이 동일 프롬프트를 Claude Code에 실행
  2. With-Skill 실행: 스킬 로드 후 동일 프롬프트 실행
  3. 비교 측정:
메트릭 측정 방법 개선 기준
토큰 사용량 input + output 토큰 -10% 이상 감소
출력 품질 루브릭 스코어 +0.15 이상 향상
정확성 assertion 통과율 80% 이상
완전성 필수 출력 포함 여부 100%

샘플 사이즈 가이드:

예상 개선율 최소 샘플 수
>= 20% 2-3회
10-20% 3-5회
< 10% 5회 이상
Mode 2: 회귀 테스트 (기존 스킬 수정 후)

스킬 수정 시 기존 테스트 케이스가 여전히 통과하는지 확인합니다.

절차:

  1. 수정 전 마지막 테스트 결과를 baseline으로 로드
  2. 수정 후 동일 테스트 케이스 재실행
  3. 비교: 기존 통과 항목이 미통과로 변경되면 regression

회귀 판정:

변화 판정
기존 통과 → 여전히 통과 PASS
기존 통과 → 미통과 REGRESSION (수정 롤백 필요)
기존 미통과 → 통과 IMPROVEMENT
새로운 테스트 추가 INFO (비교 불가)
Mode 3: 체인 테스트 (스킬 조합 검증)

여러 스킬이 순차적으로 연결되는 체인을 테스트합니다. 프로젝트에 정의된 모든 스킬 체인이 검증 대상입니다.

3-1. Chain Definition Format
chain:
  name: "blog-publishing"
  description: "Blog post creation → AI slop review → optional media generation"
  steps:
    - skill: "moai-marketer:content-blog"
      output_type: "markdown"
      provides: ["blog_draft"]
    - skill: "moai-coworker:ai-slop-reviewer"
      input_from: ["blog_draft"]
      output_type: "markdown"
      provides: ["reviewed_draft"]
    - skill: "moai-media:media-higgsfield-image"
      input_from: ["reviewed_draft"]
      output_type: "image_url"
      optional: true
      provides: ["cover_image"]

Read the full file on GitHub · 386 lines

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. 7d ago First seen · 386 lines · 191 tokens per session scan A 3dd98e7a518f

Subscribe to this mod's changes

meta-skill-tester is a skill published in the GitHub repository modu-ai/moai-cowork (300 stars, last pushed 8d ago), licensed Apache-2.0. It adds 191 tokens to every session and 3,968 once invoked, about $0.0010 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 2026-09-03.