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 xyva-yuangui/XyvaClaw --skill test-runnergit clone --depth 1 https://github.com/xyva-yuangui/XyvaClawWrote 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/xyva-yuangui/xyvaclaw/test-runner)<a href="https://agentmods.dev/skills/xyva-yuangui/xyvaclaw/test-runner"><img src="https://agentmods.dev/badge/skills/xyva-yuangui/xyvaclaw/test-runner/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.
<a href="https://agentmods.dev/skills/xyva-yuangui/xyvaclaw/test-runner"><img src="https://agentmods.dev/badge/skills/xyva-yuangui/xyvaclaw/test-runner.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00003 | $0.01328 |
| Opus 5.5 | $0.00001 | $0.00531 |
| Sonnet 5.5 | $0.00001 | $0.00266 |
| Haiku 4.5 | $0.00000 | $0.00133 |
Grade A, and why
test-runner 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 1mo 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.
This is a copy
89% identical to test-runner — 15 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 — 207 lines — stays where its author put it; the contents beside it link to each section on GitHub.
test-runner
Write and run tests across languages and frameworks.
Framework Selection
| Language | Unit Tests | Integration | E2E |
|---|---|---|---|
| TypeScript/JS | Vitest (preferred), Jest | Supertest | Playwright |
| Python | pytest | pytest + httpx | Playwright |
| Swift | XCTest | XCTest | XCUITest |
Quick Start by Framework
Vitest (TypeScript / JavaScript)
npm install -D vitest @testing-library/react @testing-library/jest-dom
// vitest.config.ts
import { defineConfig } from 'vitest/config'
export default defineConfig({
test: {
globals: true,
environment: 'jsdom',
setupFiles: './tests/setup.ts',
},
})
npx vitest # Watch mode
npx vitest run # Single run
npx vitest --coverage # With coverage
Jest
npm install -D jest @types/jest ts-jest
npx jest # Run all
npx jest --watch # Watch mode
npx jest --coverage # With coverage
npx jest path/to/test # Single file
pytest (Python)
uv pip install pytest pytest-cov pytest-asyncio httpx
pytest # Run all
pytest -v # Verbose
pytest -x # Stop on first failure
pytest --cov=app # With coverage
pytest tests/test_api.py -k "test_login" # Specific test
pytest --tb=short # Short tracebacks
XCTest (Swift)
swift test # Run all tests
swift test --filter MyTests # Specific test suite
swift test --parallel # Parallel execution
Playwright (E2E)
npm install -D @playwright/test
npx playwright install
npx playwright test # Run all
npx playwright test --headed # With browser visible
npx playwright test --debug # Debug mode
npx playwright test --project=chromium # Specific browser
npx playwright show-report # View HTML report
What ships with it
4 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.
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.
- 1mo ago First seen · 207 lines · 3 tokens per session scan A 6dac7a9dd763
test-runner is a skill published in the GitHub repository xyva-yuangui/XyvaClaw (21 stars, last pushed 2mo ago), licensed MIT. It adds 3 tokens to every session and 1,328 once invoked, about $0.0000 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 89% identical to test-runner, differing in 15 lines, and is treated as a copy.
Other skills, from other repositories
develop-web-game
Use when Codex is building or iterating on a web game (HTML/JS) and needs a reliable development + testing loop: implement small changes, run a Playwright-based test script with short input bursts and intentional pauses, inspect screenshots/text, and review console errors with rendergametotext.
testing-expert
Expert-level software testing with unit tests, integration tests, E2E tests, TDD/BDD, and testing best practices. Use when the user mentions TDD, BDD, unit tests, integration tests, or end-to-end tests, or when the task involves Testing Fundamentals, Unit Testing, Integration Testing, or End-to-End Testing.
codexkit-test-hardening
Strengthen test coverage around changed behavior, edge cases, and regressions without writing noisy or brittle tests.
testing-strategies
Systematic testing for confidence without over-testing — the right test at the right level.
converter-qa
Test harness for validating converter outputs with 284 assertions across all converter muscles.
testing-strategy
Test selection and scope guidance: tiers, marks, batching, cross-module regressions. Loaded by the testing rule module. Triggers: 'which tests should I run', 'test scope', 'test tiers'. NOT for: writing tests (use test-driven-development) or fixing broken tests (use fixing-tests).