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Agent skill

A2ui Test Quality Check

by a2ui-project in a2ui-project/a2ui

Auditing test suites for assertion utility, boundary cases coverage, and verification strength.

Apache-2.0Auto-check passedTesting & QA

Install A2ui Test Quality Check

skills CLI
$ npx skills add a2ui-project/a2ui --skill a2ui-test-quality-check -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install a2ui-project/a2ui a2ui-test-quality-check --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/a2ui-project/a2ui.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/a2ui-test-quality-check .claude/skills/a2ui-test-quality-check && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
a2ui-test-quality-check
GitHub stars
17k
Token cost
~620 tokens
SKILL.md length
314 words
Files
1
Skills in repo
20
Repo updated
First seen
Licence
Apache-2.0

At a glance

Auditing test suites for assertion utility, boundary cases coverage, and verification strength.

  • Works in 5 steps: Locate Test Suites → Audit Assertion Quality → Audit Behavioral and Boundary Coverage → …
  • Tasks that involve Test generation
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

A2ui Test Quality Check is an agent skill from a2ui-project/a2ui. Auditing test suites for assertion utility, boundary cases coverage, and verification strength.

Its SKILL.md is about 620 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Testing & QA, covering Test generation. The licence is Apache-2.0.

When your agent uses it

  • Tasks that involve Test generation

Example prompts

  • “/a2ui-test-quality-check”

Workflow steps

5 steps, taken from the first numbered list in SKILL.md.

  1. Locate Test Suites
  2. Audit Assertion Quality
  3. Audit Behavioral and Boundary Coverage
  4. Audit Mocking Realism
  5. Format the Report

What it can do on your machine

Read from SKILL.md and the folder at commit 03b77ae. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

A2ui Test Quality Check loads about 620 tokens when it runs. Until then it costs about 30 tokens; SKILL.md has 314 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~30
When it runs · the whole SKILL.md, loaded when a task matches
~620

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from a2ui-project/a2ui at commit 03b77ae, republished under its Apache-2.0 licence (© a2ui-project). 314 words, ~620 tokens.

Download SKILL.mdSave it as .claude/skills/a2ui-test-quality-check/SKILL.md (or your agent's skills folder).
name
a2ui-test-quality-check
description
Auditing test suites for assertion utility, boundary cases coverage, and verification strength.

A2UI Test Quality & Assertions Auditing Skill

This skill guides you through the process of auditing codebase test suites to verify that tests are providing robust, meaningful assertions and verifying critical invariants, rather than simply running paths for code coverage.

Instructions

  1. Locate Test Suites:

    • Find all test directories and test files in each platform's implementation folder (e.g. tests/, test/, *Tests.swift).

  2. Audit Assertion Quality:

    • For each test case, inspect the assertions used:
      • Flag "weak assertions" that only verify non-null or truthy values without checking specific payload structure, field values, or types (e.g. expect(result).not.toBeNull() on a complex object).
      • Flag "empty tests" that execute code blocks but lack any assertions or mocks verifications (e.g. executing to check for lack of exceptions, unless it is explicitly marked as a no-throw smoke test).
      • Ensure that return models, state side effects, and events dispatched have corresponding value-matching assertions.

  3. Audit Behavioral and Boundary Coverage:

    • Review if tests exist for typical logical edge cases:
      • Null, empty, or overflow values.
      • Invalid JSON or parsing errors (e.g., throwing correct exceptions).
      • Exception propagation and error boundaries.
      • Timeout handling and cleanup side effects.
    • Look for cases where tests might pass when they should fail.
    • Cross-reference with the codebase's main files: if a file has complex parsing/validation code, ensure there are dedicated failing test cases asserting that errors are reported correctly.

  4. Audit Mocking Realism:

    • Ensure mocks and stubs verify their call parameters (e.g., verifying that a mock transport received the exact payload sent by the SDK, rather than just asserting it was called).

  5. Format the Report:

    • Build a Markdown report summarizing the findings:
      • Table of audited test suites and files.
      • Weak Assertions: List of test cases that rely on weak or missing assertions.
      • Missing Edge Case Tests: Critical logic boundaries and exception paths lacking tests.
      • Mocking Mismatches: Mock implementations that fail to verify call structures.
    • Return this Markdown report as your final response.

© a2ui-project, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in .agents/skills/a2ui-test-quality-check of a2ui-project/a2ui.

Open the folder on GitHubat commit 03b77ae

Compare with similar skills

A2ui Test Quality Check next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

A2ui Test Quality Check compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
A2ui Test Quality Check this skilla2ui-project/a2ui17k—~620Automated safety check: PassApache-2.0
Emcaklofas/kicad-happy1.4k1 repos~2.8kAutomated safety check: PassMIT
Swig Testswig/swig6.3k—~2.3kAutomated safety check: PassCustom licence
Generate Test Cases342164796/generate-test-cases1191 repos~2.9kAutomated safety check: PassNone
Wioworkersio/skills200—~5.8kAutomated safety check: PassMIT
Verify Cc Safety Netkenryu42/cc-safety-net1.6k—~2kAutomated safety check: PassMIT

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Categories

Questions about A2ui Test Quality Check

What does A2ui Test Quality Check do?

Auditing test suites for assertion utility, boundary cases coverage, and verification strength. A2ui Test Quality Check is an agent skill from a2ui-project/a2ui. Auditing test suites for assertion utility, boundary cases coverage, and verification strength.

When should I use A2ui Test Quality Check?

A2ui Test Quality Check fits situations like: tasks that involve Test generation.

How do I install A2ui Test Quality Check in Claude Code?

Run `npx skills add a2ui-project/a2ui --skill a2ui-test-quality-check -a claude-code`. Or copy the skill folder (.agents/skills/a2ui-test-quality-check in a2ui-project/a2ui) into .claude/skills/a2ui-test-quality-check in your project. Claude Code loads it when a task matches its description.

How do I install A2ui Test Quality Check in Codex?

Run `npx skills add a2ui-project/a2ui --skill a2ui-test-quality-check -a codex`. Or copy the skill folder (.agents/skills/a2ui-test-quality-check in a2ui-project/a2ui) into .agents/skills/a2ui-test-quality-check in your project. Codex loads it when a task matches its description.

Can I use A2ui Test Quality Check in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add a2ui-project/a2ui --skill a2ui-test-quality-check -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/a2ui-test-quality-check, .gemini/skills/a2ui-test-quality-check, .github/skills/a2ui-test-quality-check and .opencode/skills/a2ui-test-quality-check in your project.

What does A2ui Test Quality Check need to run?

SKILL.md names no scripts, command-line tools or credentials: A2ui Test Quality Check is instructions for the agent only.

Does A2ui Test Quality Check access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is A2ui Test Quality Check safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does A2ui Test Quality Check use?

A2ui Test Quality Check is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does A2ui Test Quality Check use?

About 620 tokens (SKILL.md is roughly 2.5k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to A2ui Test Quality Check?

Skills that share tags, products or a category with A2ui Test Quality Check: Emc (aklofas/kicad-happy, 1.4k stars), Swig Test (swig/swig, 6.3k stars), Generate Test Cases (342164796/generate-test-cases, 119 stars) and Wio (workersio/skills, 200 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains A2ui Test Quality Check?

a2ui-project (a GitHub organization) maintains it in a2ui-project/a2ui, which has 16,638 GitHub stars. The repository holds 20 skills in this directory. The repository was last updated on October 9, 2026.

Source: a2ui-project/a2ui on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.