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test-quality

test-quality is a skill for Claude Code, Codex from antoniocascais/claude-code-toolkit. It costs 79 tokens per session (1,037 once invoked), scanned A, original, AGPL-3.0.

Guidance for creating effective unit tests, which check small parts of a program in isolation. It also covers reviewing tests, improving them, and checking how well they cover important cases.

In plain words
What is it for?
Use it when writing, reviewing, or strengthening unit tests, designing test cases, or assessing whether test coverage is meaningful.
Why use it?
It helps avoid tests that pass without catching real bugs, including tests that cover only the easiest path through the code.

Skill for Claude CodeCodex

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

not rated 13repo 3mo ago A scan 79 tokens AGPL-3.0

Good fit Use it when writing, reviewing, or strengthening unit tests, designing test cases, or assessing whether test coverage is meaningful.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/antoniocascais/claude-code-toolkit/test-quality
View source ↗ antoniocascais/claude-code-toolkit
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 antoniocascais/claude-code-toolkit --skill test-quality
Clone the repo
git clone --depth 1 https://github.com/antoniocascais/claude-code-toolkit

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 test-quality

README.md
[![agentmods](https://agentmods.dev/badge/skills/antoniocascais/claude-code-toolkit/test-quality/github.svg)](https://agentmods.dev/skills/antoniocascais/claude-code-toolkit/test-quality)
Your own site
<a href="https://agentmods.dev/skills/antoniocascais/claude-code-toolkit/test-quality"><img src="https://agentmods.dev/badge/skills/antoniocascais/claude-code-toolkit/test-quality/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 test-quality

Your own site · 80×15
<a href="https://agentmods.dev/skills/antoniocascais/claude-code-toolkit/test-quality"><img src="https://agentmods.dev/badge/skills/antoniocascais/claude-code-toolkit/test-quality.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 79 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,037 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00079 $0.01037
Opus 5.5 $0.00032 $0.00415
Sonnet 5.5 $0.00016 $0.00207
Haiku 4.5 $0.00008 $0.00104

Measured 2mo ago against content hash 5ee59594e2ab, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

test-quality 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.

skills/test-quality/SKILL.md · 123 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. 2mo ago First seen · 123 lines · 79 tokens per session scan A 5ee59594e2ab

Subscribe to this mod's changes

test-quality is a skill published in the GitHub repository antoniocascais/claude-code-toolkit (13 stars, last pushed 3mo ago), licensed AGPL-3.0. It adds 79 tokens to every session and 1,037 once invoked, about $0.0003 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.

TestingUnit testing
Related

test-quality compared with skills from other repositories

test-quality next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
test-qualityantoniocascais/claude-code-toolkitSkill133mo agoAGPL-3.0A79Claude Code, Codex
test-masterJeffallan/claude-skillsSkill12k7d agoMITA104Claude Code
migrate-xunit-to-xunit-v3dotnet/skillsSkill5.8kyesterdayMITA149Claude Code
go-testingGentleman-Programming/gentle-aiSkill8.4kyesterdayMITA26Claude Code, Codex
principle-test-behavior-not-implementationmichael-denyer/pstack-claudeSkill4.1kyesterdayMITA50Claude Code
dart-testdartsim/dartSkill1.2kyesterdayBSD-2-ClauseA18Claude Code, Codex
test-generatorrshankras/claude-code-apple-skillsSkill8642d agoMITA33Claude Code