Claude Code Skills Marketplace is a collection and marketplace of skills, plugins, agents, and instructions that extend Claude Code with specialized development workflows. It is for developers who want to install existing workflows or create, validate, and package their own Claude Code skills.
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.
npx agentmods add skills/daymade/claude-code-skills/qa-expertnpx skills add daymade/claude-code-skills --skill qa-expertgit clone --depth 1 https://github.com/daymade/claude-code-skillsWrote 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.
[](https://agentmods.dev/skills/daymade/claude-code-skills/qa-expert)<a href="https://agentmods.dev/skills/daymade/claude-code-skills/qa-expert"><img src="https://agentmods.dev/badge/skills/daymade/claude-code-skills/qa-expert.svg" alt="Measured on agentmods" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00088 | $0.02542 |
| Opus 5 | $0.00044 | $0.01271 |
| Sonnet 5 | $0.00018 | $0.00508 |
| Haiku 4.5 | $0.00009 | $0.00254 |
Grade A, and why
qa-expert 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 yesterday.
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.
This is a copy
95% identical to test-suite-architect — 3 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 289 lines — stays where its author put it; the contents beside it link to each section on GitHub.
QA Expert
Establish world-class QA testing processes for any software project using proven methodologies from Google Testing Standards and OWASP security best practices.
When to Use This Skill
Trigger this skill when:
- Setting up QA infrastructure for a new or existing project
- Writing standardized test cases (AAA pattern compliance)
- Executing comprehensive test plans with progress tracking
- Implementing security testing (OWASP Top 10)
- Filing bugs with proper severity classification (P0-P4)
- Generating QA reports (daily summaries, weekly progress)
- Calculating quality metrics (pass rate, coverage, gates)
- Preparing QA documentation for third-party team handoffs
- Enabling autonomous LLM-driven test execution
Quick Start
One-command initialization:
python scripts/init_qa_project.py <project-name> [output-directory]
What gets created:
- Directory structure (
tests/docs/,tests/e2e/,tests/fixtures/) - Tracking CSVs (
TEST-EXECUTION-TRACKING.csv,BUG-TRACKING-TEMPLATE.csv) - Documentation templates (
BASELINE-METRICS.md,WEEKLY-PROGRESS-REPORT.md) - Master QA Prompt for autonomous execution
- README with complete quickstart guide
For autonomous execution (recommended): See references/master_qa_prompt.md - single copy-paste command for 100x speedup.
Core Capabilities
1. QA Project Initialization
Initialize complete QA infrastructure with all templates:
python scripts/init_qa_project.py <project-name> [output-directory]
Creates directory structure, tracking CSVs, documentation templates, and master prompt for autonomous execution.
Use when: Starting QA from scratch or migrating to structured QA process.
2. Test Case Writing
Write standardized, reproducible test cases following AAA pattern (Arrange-Act-Assert):
- Read template:
assets/templates/TEST-CASE-TEMPLATE.md - Follow structure: Prerequisites (Arrange) → Test Steps (Act) → Expected Results (Assert)
- Assign priority: P0 (blocker) → P4 (low)
- Include edge cases and potential bugs
What ships with it
9 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- .security-scan-passed 187 B
- assets/templates/TEST-CASE-TEMPLATE.md 4.4 KB
- references/day1_onboarding.md 9.5 KB
- references/google_testing_standards.md 5.0 KB
- references/ground_truth_principle.md 9.8 KB
- references/llm_prompts_library.md 16 KB
- references/master_qa_prompt.md 12 KB
- scripts/calculate_metrics.py 2.8 KB runs code
- scripts/init_qa_project.py 12 KB runs code
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.
- yesterday First seen · 289 lines · 88 tokens per session scan A 9c38813fe3b9
qa-expert is a skill published in the GitHub repository daymade/claude-code-skills (1,375 stars, last pushed yesterday), licensed MIT. It adds 88 tokens to every session and 2,542 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. It is 95% identical to test-suite-architect, differing in 3 lines, and is treated as a copy.
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