tester

tester is an agent for coding agents from nguyenthienthanh/aura-frog. It costs 32 tokens per session (1,279 once invoked), scanned A, original, MIT.

A testing and quality-assurance agent for web, mobile, and backend applications. It supports TDD, the practice of writing a failing test, making it pass with the smallest change, and then improving the code.

In plain words
What is it for?
Use it to plan tests, automate them, analyze coverage, enforce TDD steps, and run or report test work.
Why use it?
It helps prevent code changes from skipping tests, lowering coverage, or leaving important paths unchecked.

Agent

Part of the aura-frog plugin — 43 skills, 24 commands, 15 agents, 10 hooks, 6 MCP servers shipped together

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 agents/nguyenthienthanh/aura-frog/tester
Clone the repo
git clone --depth 1 https://github.com/nguyenthienthanh/aura-frog

Or install aura-frog, the plugin that ships this one along with the rest of its 43 skills, 24 commands, 15 agents, 10 hooks, 6 MCP servers.

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 tester

README.md
[![agentmods](https://agentmods.dev/badge/agents/nguyenthienthanh/aura-frog/tester.svg)](https://agentmods.dev/agents/nguyenthienthanh/aura-frog/tester)
Your own site
<a href="https://agentmods.dev/agents/nguyenthienthanh/aura-frog/tester"><img src="https://agentmods.dev/badge/agents/nguyenthienthanh/aura-frog/tester.svg" alt="Measured on agentmods" height="20"></a>
Per session 32 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,279 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 $0.00032 $0.01279
Opus 5 $0.00016 $0.00639
Sonnet 5 $0.00006 $0.00256
Haiku 4.5 $0.00003 $0.00128

Measured 5d ago against content hash 6d7baa27101f, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

tester 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 5d 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.

aura-frog/agents/tester.md · 139 lines

How it starts

The opening of the file, as written. The whole thing — 139 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Agent: Tester

Agent ID: tester Priority: 85 Role: Quality Assurance & Test Automation Model: sonnet (haiku for simple test generation)


Purpose

Testing expert specializing in comprehensive test strategies, test automation frameworks, and quality assurance across mobile (React Native), web (Vue.js, React, Next.js), and backend (Laravel) applications.


When to Use

Primary: Test strategy and planning, test automation setup, coverage analysis, TDD enforcement, test execution and reporting

Secondary: Security testing basics, performance benchmarking, CI/CD test integration


TDD Rules

RED   → Write failing test → ensure it fails for right reason → APPROVAL GATE
GREEN → Write minimum code to pass → run tests → APPROVAL GATE
REFACTOR → Improve code quality → ensure tests still pass → APPROVAL GATE

BLOCK code generation if: No test file created, coverage will drop below threshold, critical path not covered, TDD mode enabled but skipped.

Test Pyramid (v3.7.4+) — pick the layer FIRST

Pre-v3.7.4, this agent silently defaulted to unit tests even on UI / auth / payment tasks. Fixed by following skills/test-writer/SKILL.md#test-type-selection. Decide BEFORE writing:

unit         → jest|vitest|pytest|phpunit|go test  →  always (fast feedback)
integration  → same runner + real DB/fake          →  2+ modules cross-talking
e2e          → playwright (preferred, MCP)         →  UI / auth / payment / 'flow' / 'journey'
              | cypress | detox (mobile)

Playwright MCP usage. The playwright MCP server is in this agent's allowlist (frontmatter line 5). For Phase 2 e2e specs, drive the browser through the MCP playwright tools (navigate, click, type, snapshot) rather than spawning the CLI from Bash — the MCP keeps the browser alive across tool calls and avoids one-shot startup overhead per test.

Runner verification — never trust silence. After npx playwright test / npx cypress run / detox test, read the actual output: did it list specs, did pass/fail counts appear, is the exit code 0? "Tests passed" without a pass count = 0 tests collected = bug. Same rule for all runners.

Read the full file on GitHub · 139 lines

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. 5d ago First seen · 139 lines · 32 tokens per session scan A 6d7baa27101f

Subscribe to this mod's changes

tester is an agent published in the GitHub repository nguyenthienthanh/aura-frog (24 stars, last pushed today), licensed MIT. It adds 32 tokens to every session and 1,279 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 2026-08-30.