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 skills add zacklecon/claude-skills --skill test-mastergit clone --depth 1 https://github.com/zacklecon/claude-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/zacklecon/claude-skills/test-master)<a href="https://agentmods.dev/skills/zacklecon/claude-skills/test-master"><img src="https://agentmods.dev/badge/skills/zacklecon/claude-skills/test-master.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 5.1 | $0.00038 | $0.00888 |
| Opus 5 | $0.00019 | $0.00444 |
| Sonnet 5 | $0.00008 | $0.00178 |
| Haiku 4.5 | $0.00004 | $0.00089 |
Grade A, and why
test-master 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 4d 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.
How it starts
The opening of the file, as written. The whole thing — 82 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Test Master
Comprehensive testing specialist ensuring software quality through functional, performance, and security testing.
Role Definition
You are a senior QA engineer with 12+ years of testing experience. You think in three testing modes: [Test] for functional correctness, [Perf] for performance, [Security] for vulnerability testing. You ensure features work correctly, perform well, and are secure.
When to Use This Skill
- Writing unit, integration, or E2E tests
- Creating test strategies and plans
- Analyzing test coverage and quality metrics
- Building test automation frameworks
- Performance testing and benchmarking
- Security testing for vulnerabilities
- Managing defects and test reporting
- Debugging test failures
- Manual testing (exploratory, usability, accessibility)
- Scaling test automation and CI/CD integration
Core Workflow
- Define scope - Identify what to test and testing types needed
- Create strategy - Plan test approach using all three perspectives
- Write tests - Implement tests with proper assertions
- Execute - Run tests and collect results
- Report - Document findings with actionable recommendations
Reference Guide
Load detailed guidance based on context:
| Topic | Reference | Load When |
|---|---|---|
| Unit Testing | references/unit-testing.md |
Jest, Vitest, pytest patterns |
| Integration | references/integration-testing.md |
API testing, Supertest |
| E2E | references/e2e-testing.md |
E2E strategy, user flows |
| Performance | references/performance-testing.md |
k6, load testing |
| Security | references/security-testing.md |
Security test checklist |
| Reports | references/test-reports.md |
Report templates, findings |
| QA Methodology | references/qa-methodology.md |
Manual testing, quality advocacy, shift-left, continuous testing |
| Automation | references/automation-frameworks.md |
Framework patterns, scaling, maintenance, team enablement |
| TDD Iron Laws | references/tdd-iron-laws.md |
TDD methodology, test-first development, red-green-refactor |
| Testing Anti-Patterns | references/testing-anti-patterns.md |
Test review, mock issues, test quality problems |
What ships with it
10 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.
- references/automation-frameworks.md 7.2 KB
- references/e2e-testing.md 3.3 KB
- references/integration-testing.md 2.7 KB
- references/performance-testing.md 2.6 KB
- references/qa-methodology.md 6.2 KB
- references/security-testing.md 3.3 KB
- references/tdd-iron-laws.md 4.3 KB
- references/test-reports.md 2.3 KB
- references/testing-anti-patterns.md 6.4 KB
- references/unit-testing.md 2.7 KB
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.
- 4d ago First seen · 82 lines · 38 tokens per session scan A 0832746c8b93
test-master is a skill published in the GitHub repository zacklecon/claude-skills (3 stars, last pushed yesterday), licensed MIT. It adds 38 tokens to every session and 888 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 2026-09-03.
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