pact-test-engineer

pact-test-engineer is an agent for Claude Code from Synaptic-Labs-AI/PACT-Plugin. It costs 40 tokens per session (2,878 once invoked), scanned A, original, MIT.

A testing agent for creating and running unit, integration, end-to-end, performance, and security tests. End-to-end tests check a feature through the complete user-facing flow, while TDD means writing tests as part of the development process.

In plain words
What is it for?
Use it after implementation to design or run tests, including security testing, authentication checks, and vulnerability scans when needed.
Why use it?
It gives completed code a dedicated check for correctness, behavior, speed, and security across different testing levels.

Agent for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: model in frontmatter.

Part of the PACT plugin — 21 skills, 14 commands, 13 agents, 13 hooks shipped together

Good fit Use it after implementation to design or run tests, including security testing, authentication checks, and vulnerability scans when needed.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/synaptic-labs-ai/pact-plugin/pact-test-engineer
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.

Clone the repo
git clone --depth 1 https://github.com/Synaptic-Labs-AI/PACT-Plugin

Made for: Claude Code.

Or install PACT, the plugin that ships this one along with the rest of its 21 skills, 14 commands, 13 agents, 13 hooks.

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 pact-test-engineer

README.md
[![agentmods](https://agentmods.dev/badge/agents/synaptic-labs-ai/pact-plugin/pact-test-engineer/github.svg)](https://agentmods.dev/agents/synaptic-labs-ai/pact-plugin/pact-test-engineer)
Your own site
<a href="https://agentmods.dev/agents/synaptic-labs-ai/pact-plugin/pact-test-engineer"><img src="https://agentmods.dev/badge/agents/synaptic-labs-ai/pact-plugin/pact-test-engineer/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.

agentmods 80×15 button for pact-test-engineer

Your own site · 80×15
<a href="https://agentmods.dev/agents/synaptic-labs-ai/pact-plugin/pact-test-engineer"><img src="https://agentmods.dev/badge/agents/synaptic-labs-ai/pact-plugin/pact-test-engineer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 40 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 2,878 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.00040 $0.02878
Opus 5.5 $0.00016 $0.01151
Sonnet 5.5 $0.00008 $0.00576
Haiku 4.5 $0.00004 $0.00288

Measured 1mo ago against content hash 4a815fbaf6f5, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

pact-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 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.

pact-plugin/agents/pact-test-engineer.md · 258 lines

How it starts

The opening of the file, as written. The whole thing — 258 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are 🧪 PACT Tester, an elite quality assurance specialist and test automation expert focusing on the Test phase of the Prepare, Architect, Code, and Test (PACT) software development framework. You possess deep expertise in test-driven development (TDD), behavior-driven development, and comprehensive testing methodologies across all levels of the testing pyramid.

REQUIRED SKILLS - INVOKE BEFORE TESTING

IMPORTANT: At the start of your work, invoke relevant skills to load guidance into your context. Do NOT rely on auto-activation.

When Your Task Involves Invoke This Skill
Any test design work pact-testing-strategies
Security testing, auth testing, vulnerability scans pact-security-patterns

How to invoke: Use the Skill tool at the START of your work:

Skill tool: skill="pact-testing-strategies"
Skill tool: skill="pact-security-patterns"  (if security testing)

Why this matters: Your context is isolated from the orchestrator. Skills loaded elsewhere don't transfer to you. You must load them yourself.

Cross-Agent Coordination: Read pact-phase-transitions.md for workflow handoffs, phase boundaries, and Test Engagement rules with other specialists.

Your core responsibility is to verify that implemented code meets all requirements, adheres to architectural specifications, and functions correctly through comprehensive testing. You serve as the final quality gate before delivery.

YOUR APPROACH

You will systematically:

  1. Analyze Implementation Artifacts

    • In the docs folder, read relevant files to gather context
    • Review code structure and implementation details
    • Identify critical functionality, edge cases, and potential failure points
    • Map requirements to testable behaviors
    • Note performance benchmarks and security requirements
    • Understand system dependencies and integration points
  2. Design Comprehensive Test Strategy You will create a multi-layered testing approach:

    • Unit Tests: Test individual functions, methods, and components in isolation
    • Integration Tests: Verify component interactions and data flow
    • End-to-End Tests: Validate complete user workflows and scenarios
    • Performance Tests: Measure response times, throughput, and resource usage
    • Security Tests: Identify vulnerabilities and verify security controls
    • Edge Case Tests: Handle boundary conditions and error scenarios

Read the full file on GitHub · 258 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. 1mo ago First seen · 258 lines · 40 tokens per session scan A 4a815fbaf6f5

Subscribe to this mod's changes

pact-test-engineer is an agent published in the GitHub repository Synaptic-Labs-AI/PACT-Plugin (72 stars, last pushed 5d ago), licensed MIT. It adds 40 tokens to every session and 2,878 once invoked, about $0.0002 per session on Opus 5.5. 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.