testcase-designer

testcase-designer is a skill for Claude Code, Codex from dangnhit/qa-tester. It costs 36 tokens per session (412 once invoked), scanned A, original, Apache-2.0.

A planner for deterministic browser test cases, meaning repeatable checks with clear steps, selectors, coverage, and declared side effects.

In plain words
What is it for?
Use it to create, revise, parameterize, or review test cases for web features and import completed drafts into a QA plan.
Why use it?
It turns approved requirements into traceable tests and prevents unsupported browser actions from being assumed.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

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/dangnhit/qa-tester/testcase-designer
Any agent
npx skills add dangnhit/qa-tester --skill testcase-designer
Clone the repo
git clone --depth 1 https://github.com/dangnhit/qa-tester

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 testcase-designer

README.md
[![agentmods](https://agentmods.dev/badge/skills/dangnhit/qa-tester/testcase-designer.svg)](https://agentmods.dev/skills/dangnhit/qa-tester/testcase-designer)
Your own site
<a href="https://agentmods.dev/skills/dangnhit/qa-tester/testcase-designer"><img src="https://agentmods.dev/badge/skills/dangnhit/qa-tester/testcase-designer.svg" alt="Measured on agentmods" height="20"></a>
Per session 36 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 412 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00036 $0.00412
Opus 5 $0.00018 $0.00206
Sonnet 5 $0.00007 $0.00082
Haiku 4.5 $0.00004 $0.00041

Measured 6d ago against content hash 40d0e1f438ab, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

testcase-designer 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.

skills/testcase-designer/SKILL.md · 30 lines

What it actually says

Testcase designer

Execution kind: agent-authored. Read artifact contracts, safety, and browser adapters. Draft bounded test-case artifacts with stable selectors and declared side effects; leave unsupported browser work to the runtime.

Resolve ./node_modules/.bin/qa-skill, then qa-skill on PATH. Stop if unavailable and never use remote npx. Import completed testcase drafts only as part of an atomic planning bootstrap.

Example — add a case:

QA_SKILL="${PWD}/node_modules/.bin/qa-skill"; [ -x "$QA_SKILL" ] || QA_SKILL="$(command -v qa-skill)" || exit 1
"$QA_SKILL" workflow bootstrap --root . --environment-file environment.json --requirement-file drafts/requirements.json --plan-file drafts/plan.json --test-case-file drafts/login-case.json --coverage-file drafts/coverage.json

PowerShell:

$QaSkill = Join-Path $PWD "node_modules/.bin/qa-skill.cmd"
if (-not (Test-Path $QaSkill)) { $QaSkill = (Get-Command qa-skill -ErrorAction Stop).Source }
& $QaSkill workflow bootstrap --root . --environment-file environment.json --requirement-file drafts/requirements.json --plan-file drafts/plan.json --test-case-file drafts/login-case.json --coverage-file drafts/coverage.json

Example — standalone: bootstrap the complete planning bundle and validate the terminal plan profile.

Example — full run: register approved cases, scaffold full-workflow.json from the returned source run ID, then run it.

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 · 30 lines · 36 tokens per session scan A 40d0e1f438ab

Subscribe to this mod's changes

testcase-designer is a skill published in the GitHub repository dangnhit/qa-tester (2 stars, last pushed 27d ago), licensed Apache-2.0. It adds 36 tokens to every session and 412 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 2026-08-31.

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