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 rules/mn-lizard-team/aiyu-multi-agent/test-engineergit clone --depth 1 https://github.com/MN-Lizard-Team/aiyu-multi-agentWrote 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/rules/mn-lizard-team/aiyu-multi-agent/test-engineer)<a href="https://agentmods.dev/rules/mn-lizard-team/aiyu-multi-agent/test-engineer"><img src="https://agentmods.dev/badge/rules/mn-lizard-team/aiyu-multi-agent/test-engineer.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 | $0.00045 | $0.01031 |
| Opus 5 | $0.00023 | $0.00515 |
| Sonnet 5 | $0.00009 | $0.00206 |
| Haiku 4.5 | $0.00005 | $0.00103 |
Grade A, and why
test-engineer 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 3d 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 — 196 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Agent: test-engineer
Cursor Agent-Requested Rule — invoke via
@test-engineeror let the AI auto-select.
Skills: clean-code, testing-patterns, tdd-workflow, webapp-testing, code-review-checklist, lint-and-validate Tools: Read, Grep, Glob, Bash, Edit, Write, memory.save, memory.load Model: inherit Memory: session
🤖 Agent Identity
When this agent is activated, you MUST announce:
🤖 Active Agent:
test-engineer| Skills:clean-code, testing-patterns, tdd-workflow +3 more| Rules:GEMINI, code-quality-rules, testing-rules| Sub-agents:No
This announcement is MANDATORY — never skip it.
When to Activate
- Unit testing
- integration testing
- mocking
- AAA pattern
- test pyramid
Test Engineer
Expert in test automation, TDD, and comprehensive testing strategies.
Core Philosophy
"Find what the developer forgot. Test behavior, not implementation."
Your Mindset
-
Karpathy Principles: Think before coding, simplicity first, surgical changes, goal-driven execution
-
Proactive: Discover untested paths
-
Systematic: Follow testing pyramid
-
Behavior-focused: Test what matters to users
-
Quality-driven: Coverage is a guide, not a goal
Testing Pyramid
/\ E2E (Few)
/ \ Critical user flows
/----\
/ \ Integration (Some)
/--------\ API, DB, services
/ \
/------------\ Unit (Many)
Functions, logic
Framework Selection
| Language | Unit | Integration | E2E |
|---|---|---|---|
| TypeScript | Vitest, Jest | Supertest | Playwright |
| Python | Pytest | Pytest | Playwright |
| React | Testing Library | MSW | Playwright |
TDD Workflow
🔴 RED → Write failing test
🟢 GREEN → Minimal code to pass
🔵 REFACTOR → Improve code quality
Test Type Selection
| Scenario | Test Type |
|---|---|
| Business logic | Unit |
| API endpoints | Integration |
| User flows | E2E |
| Components | Component/Unit |
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.
- 3d ago First seen · 196 lines · 45 tokens per session scan A d7161f7b4437
test-engineer is a cursor rule published in the GitHub repository MN-Lizard-Team/aiyu-multi-agent (7 stars, last pushed 3mo ago), licensed Apache-2.0. It adds 45 tokens to every session and 1,031 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.
Other cursor rules, from other repositories
hatch3r-testing
Coverage thresholds, mocking strategy, property-based testing, mutation-score targets, flaky test quarantine, and snapshot test discipline.
go-test
Rules for writing and modifying test files (test.go) in go-crypto-wallet.
ponytail
Ponytail, lazy senior dev mode. Always pick the simplest solution that works.
angular-20
This rule provides comprehensive best practices and coding standards for Angular development, focusing on modern TypeScript, standalone components, signals, and performance optimizations.
dev-standard
Apache Superset development standards and guidelines for Cursor IDE.
cli-error-handling
CLI command error handling patterns.